2021 Mazda Mazda3

The volume 2021 Mazda3 sedan trim (Select, FWD, six-speed automatic) uses the naturally aspirated Skyactiv-G 2.5 rated at 186 hp, unchanged from the BP generation's 2019 launch; 2021's news is the added 2.5 Turbo above it, not a change to the volume engine.

Peak torque of the volume trim's naturally aspirated 2.5 is 186 lb-ft and arrives high at 4,000 rpm, so the car has to be revved to move briskly — mid-pack for a non-turbo compact and far below the turbo's 310–320 lb-ft at 2,000–2,500 rpm.

Instrumented tests of the 186-hp naturally aspirated 2.5 sedan cluster around 7.0–7.3 s for FWD, with Car and Driver recording 7.5 s for the heavier 2021 AWD sedan; ≈7.1 s is the fair figure for the FWD volume car — adequate but slower than turbocharged compact rivals.

The naturally aspirated Skyactiv-G 2.5 is linear, quiet at cruise and free of turbo lag, and reviewers call it smooth-revving, but tall gearing means it must be worked hard from a stop and it grows audibly coarse near its 6,000 rpm power peak. The 2021 volume engine had not yet received the revision Mazda applied for 2023.

Mazda's Skyactiv-Drive six-speed torque-converter automatic is a segment standout for shift quality — unobtrusive at part throttle, crisp and well-timed on downshifts, with none of the drone of the CVTs most compact rivals use. Its only real deficit is ratio count: six gears against the eight-plus common elsewhere, which costs highway economy and stretches 2nd and 3rd.

i-Activ AWD is optional on the Select, Preferred and Premium 2.5 trims and standard on both 2.5 Turbo trims, making AWD reachable across most of the 2021 sedan range — unusually broad for a compact sedan. It is nonetheless a basic predictive on-demand system with no low range, locking differential or terrain modes, and it is unavailable on the base 2.0 and 2.5 S sedans.

2021 is the broadest the BP-generation Mazda3 got in the US: three distinct gasoline engines (155 hp 2.0, 186 hp naturally aspirated 2.5, and the new 227/250 hp turbo 2.5) plus a six-speed manual on one hatchback trim. But every option is gasoline — no hybrid, plug-in or EV variant anywhere in the range, while most compact rivals already offered at least a hybrid.

EPA rates the volume 2021 Mazda3 sedan — naturally aspirated 2.5, FWD, six-speed automatic — at 30 MPG combined on regular gasoline. Respectable for a non-hybrid compact, but the six-speed's tall-but-few ratios and the absence of any hybrid option leave it well behind the segment's efficiency leaders.

EPA city rating for the volume FWD 2.5 automatic sedan is 26 MPG — mid-pack among gasoline compacts and the weakest of its three EPA figures, since city driving is where the lack of any electrified assist costs the Mazda3 most.

35 MPG highway is the volume trim's best figure and the aerodynamic sedan body's advantage over the hatchback (34 MPG), though the six-speed automatic's ratio count caps it below the eight- and ten-speed or CVT compacts that reach 38–40 MPG.

The FWD sedan's 13.2-gallon tank at its 30 MPG EPA combined rating gives roughly 396 miles between fills. That is a genuine weakness relative to the class: the small tank, not the economy, is the limiter, and AWD models give up another half-gallon.

EPA puts annual fuel cost for the volume 2.5 FWD sedan at $2,050 at standard assumptions — cheap in absolute terms because it drinks regular, but it cannot match the compact hybrids that run several hundred dollars a year less.

The volume 2.5 runs on regular 87-octane unleaded with no output or economy penalty, and every 2021 Mazda3 is EPA-certified on regular. Only the new 2.5 Turbo trades output for grade — 227 hp on 87 versus 250 hp on 93 — and even that is an optional gain rather than a premium-fuel requirement.

NHTSA awarded the 2021 Mazda3 sedan a 5-star overall rating with 5 stars in every subtest, including both frontal and side pole, and no dynamic tip in the rollover test.

The 2021 Mazda3 sedan is an IIHS TOP SAFETY PICK+ with Good ratings in all six crashworthiness evaluations — a clean sweep, with only the volume-trim headlight rating keeping it out of the very top of the band.

Every 2021 Mazda3 trim — including the $20k 2.0 sedan — comes with Smart Brake Support (AEB with pedestrian detection), Mazda Radar Cruise Control with Stop & Go, lane departure warning, lane-keep assist, high beam control and driver attention alert, which is unusually generous for the class. Only blind-spot monitoring with rear cross-traffic alert is trim-gated, standard from Select upward (i.e. on the volume trim but not the two cheapest).

IIHS rated the front crash prevention Superior in both the vehicle-to-vehicle and the vehicle-to-pedestrian daytime evaluations, avoiding collisions in the 12 and 25 mph runs and in all three pedestrian scenarios. IIHS had not yet introduced the nighttime pedestrian test for the 2021 model year, so night performance is unverified.

Blind Spot Monitoring with Rear Cross Traffic Alert is standard from Select up (so present on the volume trim) but unavailable on the 2.0 and 2.5 S, and it is alert-only — rear cross-traffic braking and the 360-degree View Monitor are confined to the top Premium Plus package. No safe-exit warning.

Lane departure warning and lane-keep assist are standard on every trim, but Mazda's implementation is a corrective nudge at the lane edge rather than true lane centering; sustained centering arrives only with Traffic Jam Assist, restricted to the Premium Plus package and limited to low-speed congestion.

Mazda Radar Cruise Control with Stop & Go is standard across the automatic-transmission range — full-speed-range ACC on the cheapest car in Mazda's lineup — and is smooth and well-regarded, but it is not paired with lane centering into a genuine highway-assist mode outside the top trim's Traffic Jam Assist.

Mazda offered no hands-free highway driving system in 2021 on any trim of the Mazda3; the most capable option is the hands-on Traffic Jam Assist on the Premium Plus package.

IIHS rated the volume trims' LED projectors Acceptable — good visibility undercut by low-beam limitations that high-beam assist partly offsets — with the Good rating reserved for the curve-adaptive units on Premium and the Turbo trims. High Beam Control is standard on every trim.

Sightlines are the fourth-generation Mazda3's clearest safety weakness: a high beltline, thick rear pillars and a small rear window with tiny tinted quarter glass leave real rearward and over-shoulder blind zones, and the sedan gets no camera compensation beyond the standard rearview camera unless you reach the Premium Plus package's 360-degree View Monitor.

IIHS rates the LATCH hardware Good with extra anchor positions available, so installation itself is straightforward; the constraint is compact-sedan rear-quarter space, which makes three-across a struggle and rear-facing seats tight behind a tall front occupant.

The 2021 Mazda3 sedan is a conventional five-passenger compact — two front seats plus a three-place rear bench on every trim, with no alternate seating configuration offered.

Mid-band front headroom for a compact sedan — the BP generation's low, coupe-influenced roofline costs it against the Elantra while matching the Corolla. The volume Select package has no moonroof, so the larger figure applies.

Front legroom is squarely competitive for the class and level with the Civic and Elantra, so tall drivers are well accommodated even though the second row is not — reviewers note the cabin is narrow rather than short up front.

Rear headroom lands mid-band and is roughly level with the Civic and Corolla (both about 37.1 in) — in the sedan the fastback-influenced roofline hurts rear sightlines more than it hurts headroom.

The Mazda3's defining packaging weakness: 35.1 in of rear legroom is several inches short of the Elantra (38.0 in) and Civic (37.4 in), and Mazda's own 0.7 in rear knee-clearance figure confirms how little margin there is behind a tall front occupant.

At 13.2 cu ft the trunk trails nearly every compact-sedan rival — the Civic (14.8), Elantra (14.2) and Jetta (14.1) all carry more — and the sedan's narrow trunk aperture compounds it.

Mazda prioritized a clean, driver-focused console over practicality: a covered console armrest bin, front door pockets with bottle holders, a single front-seatback map pocket and one 12-volt outlet. The 60/40 split-folding rear seatback and the rear armrest with cupholders (Select and above) are the only real flexibility features, and there is no fold-flat, underfloor or factory wireless-charging provision on any 2021 trim.

Front seats are a genuine strength — Mazda's spine-alignment design draws repeated praise for long-haul support, and the volume Select package already fits leatherette-trimmed sport seats. It is held out of the top band because Select seats are manually adjusted (8-way power with lumbar and memory only arrives with the Preferred package) and because the short rear legroom limits adult comfort in back regardless of cushioning.

Body control and damping are well judged, but the torsion-beam rear axle and firm tuning make the Mazda3 busier over broken pavement than the Civic or Corolla — composed and sporting rather than plush. The volume Select package moves from the base car's 16-inch wheels to 18s on 215/45 tires, which sharpens impacts.

Isolation is one of the Mazda3's clearer comfort advantages in the segment — extensive sound deadening plus a geared automatic instead of a CVT keep wind and powertrain noise below the Civic, Elantra and Corolla. It is marked down from the top band because reviewers note the low-slung sedan still admits more road roar than Mazda's own SUVs, particularly on the 18-inch fitment.

Dual-zone automatic climate control arrives with the volume Select package and three-level heated front seats with the Preferred package, and the heated steering wheel is standard on both 2.5 Turbo trims from $29,900 — reachable, if not cheap. But the base 2.0 and 2.5 S get single-zone air conditioning only, and no 2021 Mazda3 offers ventilated seats, rear-seat air vents or remote pre-conditioning beyond app remote start.

For 2021 Mazda added a new entry-level 2.0 sedan below the 2.5 S — a 155 hp Skyactiv-G 2.0 with the six-speed automatic, front-wheel drive and the full standard i-Activsense suite — which dropped the Mazda3's price of entry to $21,445 delivered, among the cheapest in the compact class. Mazda raised car destination and handling from $945 to $995 effective February 1, 2021 and nudged the 2.0's MSRP to $20,650, so late-build 2021 cars entered at $21,645.

The 2.5 S with the Select package is the volume configuration: it steps up from the 2.0 to the 186 hp 2.5 and adds blind-spot monitoring with rear cross-traffic alert, leatherette-and-cloth trim, rear armrest and heated mirrors for $2,200 — the equipment step most compact-sedan buyers take. It is $1,200 above the 2.5 S and is where i-Activ AWD first becomes available ($25,045 delivered).

The volume 2021 Mazda3 runs the naturally aspirated Skyactiv-G 2.5 through a conventional torque-converter six-speed automatic — no turbocharger, no CVT and no dual-clutch — and industry repair data puts the nameplate well below the compact-car average for both frequency and severity. Held a touch below the later model years in this dataset because the 2021 car's five-year service window ran through a cheaper parts-and-labor period, but above the Civic and Corolla because Mazda's smaller dealer network and parts pricing run slightly dearer.

The 2021 model year is now actually five years old, so this is closer to a measurement than a projection — and it beats the nameplate's long-run projection because 2021 cars were bought into, and sold out of, the pandemic used-car price spike. KBB's current value for a 2021 2.5 S sedan works out to roughly 68% of its $22,445 delivered MSRP; the loaded trims retain less, and CarEdge's model-wide projection is 62%, so 64% is the defensible middle for the volume Select.

Mazda's New Vehicle Limited Warranty is the industry-baseline 36 months/36,000 miles — the floor of the segment band and only 60% of the term Hyundai and Kia offered in 2021. This is a real ownership-cost disadvantage rather than a scoring artifact.

Engine, transmission and drivetrain are covered for 60 months/60,000 miles — again the bottom of the band, matching Honda, Toyota and Nissan but half the term of the Korean brands' 10-year/100,000-mile original-owner coverage. The 2021 US Mazda3 was gasoline-only, so no hybrid or high-voltage battery coverage applies.

Mazda offered no factory complimentary scheduled-maintenance program on the 2021 Mazda3 — what a buyer got was 24/7 Emergency Roadside Assistance tied to the 3-year/36,000-mile warranty term and, new for 2021, Mazda Connected Services standard on every trim with a three-year trial (MyMazda remote lock/unlock, remote engine start, vehicle status) plus a short in-car Wi-Fi trial. That is the basic-roadside-plus-connected-trial band: better than nothing, but well behind ToyotaCare's 2 yr/25,000 mi and Hyundai's 3 yr/36,000 mi included service, and the "complimentary maintenance" a 2021 shopper encountered was a dealer-level prepaid plan with terms that varied store to store, not a manufacturer benefit.

$23,645 volume-trim price minus its estimated resale value after 5 years (64% retained, or about $15,133) leaves about $8,512 in depreciation. Add the projected $3,850 in 5-year maintenance and repairs, and owning this vehicle for 5 years costs about $12,362 in total.

Solidly above average but a step down from the BP generation's best years, which puts this in the upper-middle band rather than the top one. The field data is genuinely good — one minor recall, 49 NHTSA complaints against 139 for the 2021 Civic, 129 for the Elantra and 184 for the Corolla, and RepairPal's 4.0/5.0 with a $433 average annual spend. What holds it to 72 is that 2021 is the weakest recent model year for this nameplate on the survey side: Consumer Reports dropped its predicted reliability to 4/5 from the 2020 car's 5/5, and Mazda's showing in the J.D. Power study that surveys 2021-model-year owners was only marginally better than the industry average, well off its 2022-MY result. The excessive-oil-consumption class action naming the 2021 Mazda3 is a further drag, though it reaches only the 2.5 Turbo and not the volume trim's naturally aspirated engine.

Mazda's multi-year dependability standing is strong — 3rd overall and 2nd among mass-market brands in the 2025 J.D. Power VDS at 161 PP100, and 3rd for used-car reliability among 5-to-10-year-old models at Consumer Reports. It lands just below the top band, and a couple of points under where a 2023 car would sit, because the study that speaks directly to this model year is Mazda's softest of the run: on the 2024 VDS, which surveys 2021-model-year owners at three years, Mazda was roughly 185 PP100 against a 190 industry average and four positions below the rank it reached the following year. Long-run the brand is a top-tier bet; the 2021 build year specifically is the least flattering slice of that record.

The recall half of this item is excellent and the TSB half is what pulls it into the middle band. Only one NHTSA campaign covers the 2021 Mazda3 — a tire air valve — after the generation's six-campaign first year in 2019 and two in 2020, so the recall record is genuinely clean five years on. Against that sits a systemic service-bulletin pattern specific to this model year: TSB 01-012/21 of October 2021 described a check-engine light from low oil level, the underlying defective valve stem seals became a nationwide class action, and Mazda opened Special Service Program SSPD5 extending the powertrain warranty to 7 years/84,000 miles. That is more than routine TSB activity. It stays at 68 rather than lower because the SSPD5 subject-vehicle table restricts every 2021 Mazda3 entry to the Skyactiv-G 2.5T, leaving the volume naturally aspirated trim outside the campaign.

The volume 2021 Mazda3 sedan runs the naturally aspirated Skyactiv-G 2.5 — a PY-series engine in continuous production since the 2012 CX-5 with a well-established high-mileage record — behind a conventional Skyactiv-Drive six-speed torque-converter automatic. Avoiding both a CVT and a dual-clutch remains a real durability edge over the Civic, Corolla, Sentra and Elantra. It scores below where the same drivetrain rates in later years for two reasons that belong to 2021 specifically: the 2.5 Turbo introduced alongside it in this model year turned out to have defective valve stem seals serious enough to draw a class action and a warranty extension, which is a mark against the engine family even though the volume unit is excluded; and i-Activ AWD was new to the sedan for 2021, with owners subsequently reporting cracked rear differential housings that lock the driveline when AWD engages.

The cabin is the 2021 Mazda3's signature advantage and the clearest gap over anything else in the compact class. Reviewers describe a dash covered in soft padded leather with expensive-feeling switchgear, a premium feel and obvious attention to detail at a price well below what the materials suggest — Car and Driver's line that even the turn-signal tick sounds upscale captures how far ahead of the segment it reads. Soft-touch coverage is broad and nothing about it feels mainstream-compact. Kept out of the low 90s only by hard plastics low in the cabin and the high-gloss piano-black centre-console trim that shows every fingerprint.

Reviewers who handled the car found the assembly tight — panel gaps consistent, controls not flimsy, everything matching up — but the survey record for this exact model year is worse than that impression, and on this model year it points at build integrity rather than at software. Mazda placed 23rd of 32 brands in the 2021 J.D. Power IQS at 177 PP100, fifteen points off the 162 industry average. More pointedly, Consumer Reports' recorded trouble spot for the 2021 Mazda3 is body integrity specifically — unexpected noises, loose or cracked seals and weather-stripping, and leaks — which is squarely what this item measures, and is a different and more damaging complaint than the infotainment gripes that drag Mazda's initial-quality numbers in other years.

Network coverage is the Mazda3's real ownership weakness and the one item that drags this category. Mazda has deliberately shrunk its US store count from 635 in 2014 to roughly 545-550 today, against approximately 1,200 Toyota and roughly 1,000 Honda dealers — so a 2021 buyer outside a major metro can face a materially longer drive for warranty work than a Civic or Corolla owner would, which matters more than usual on a model year carrying a warranty-extension campaign. It sits a point below where the 2023 car rates because the Retail Evolution facility-upgrade program was substantially less far along in 2021, still years from its 300th opening, and because that program upgrades existing stores rather than adding new ones. Service satisfaction itself is around the mass-market average; coverage is what sets the score.

Running costs are genuinely low: RepairPal puts the 2021 Mazda 3's average annual repair-and-maintenance spend at $433 against $526 for compact cars and $652 across all vehicles, with low repair severity and 0.3 unscheduled shop visits per year. It sits in the normal band rather than the 80+ one because Mazda's US volume is a fraction of Toyota's or Honda's, so the independent parts catalogue and aftermarket are thinner and model-specific components remain effectively dealer-order. This model year takes an extra couple of points for a documented instance of that thinness biting: at least one owner reported to NHTSA that the part needed for the valve stem seal class-action repair was simply unavailable and that the wait exceeded a reasonable time.

Every 2021 Mazda3 package, from the $20,500 2.0 sedan to the Turbo Premium Plus, carries the same 8.8-inch widescreen center display; no larger option exists. The display is also not touch-sensitive in any mode, which this size score does not capture — the 10.25-inch touch-capable unit did not arrive until the 2024 refresh.

Mazda Connect is clean, quick and refreshingly physical — a rotary Commander dial, a real volume knob and separate climate controls make it genuinely low-distraction. But the 2021 car has no touch input at all, even inside CarPlay and Android Auto, so working a projected phone interface with a knob is slower than in any rival; the 2024 refresh explicitly addressed exactly this.

Both CarPlay and Android Auto are wired-only for 2021 — wireless connectivity did not arrive until the 2024 refresh — and unlike later model years they are not line-wide: the entry 2.0 sedan omits phone projection entirely, so coverage starts at the 2.5 S. That combination puts it at the very bottom of the 'wired standard' band.

The Mazda Navigation System is confined to the Premium package and the Turbo Premium Plus, so no volume-priced 2021 Mazda3 has native maps, and Mazda's 'Infotainment system voice command' is a fixed-command list rather than a natural-language assistant. Most owners simply default to CarPlay or Android Auto for both search and guidance.

The standard eight-speaker system is respectable for a compact sedan and the 12-speaker Bose Centerpoint/AudioPilot upgrade is among the better premium setups in the class. It sits below the top band because for 2021 the Bose system requires the Premium package or a Turbo — the volume Select cannot be optioned with it — and SiriusXM likewise starts at Premium.

A 7-inch TFT/LCD meter display is standard on every 2021 trim including the base 2.0 — crisply rendered and set inside an otherwise conventional binnacle, with a full-digital centre-meter rendering on upper trims. It is small and only lightly configurable next to the wide clusters Hyundai and Volkswagen were fitting, so it lands mid-band.

The 2021 Mazda3 has no meaningful over-the-air update capability. Mazda Connected Services — newly standard across the range for 2021, along with an in-car Wi-Fi hotspot trial — delivers telematics and connectivity, not vehicle software; infotainment and map updates remain a dealer or USB/SD-card operation. This is the car's weakest technology attribute against Hyundai and Kia rivals already shipping whole-vehicle OTA.

2021 is the year Mazda Connected Services became standard on every Mazda3 rather than an upper-trim item, so the volume buyer gets the core MyMazda set — remote engine start, remote lock/unlock, vehicle status, vehicle finder — on a three-year complimentary trial before subscription fees begin. There is no phone-as-key, and the app draws routine criticism for sluggish command response.

Two front USB-A audio inputs and a single 12-volt outlet is the whole provision: no USB-C anywhere, no factory wireless charging pad on any trim (Mazda sells one as a dealer-installed accessory), no rear-seat charging port and no household outlet. Rivals at the same money were already shipping standard wireless charging and rear USB ports.

The Mazda Advanced Keyless Entry System with push-button start arrives at the volume Select package, with remote engine start available through the MyMazda app on the now-standard three-year Connected Services trial. Below Select it is a conventional remote-keyless-entry fob, there is no phone-as-key, and as a sedan there is no hands-free liftgate — so it sits solidly mid-band.

A rearview camera is standard on every trim, but that is all a volume buyer gets: the 360-degree View Monitor and front/rear parking sensors are locked to the Turbo Premium Plus package at the very top of the range, there is no automated parking, and camera resolution is only average. The gap matters more than usual here because the gen-4 body's thick C-pillars already compromise rearward visibility.

A windshield-projected head-up display is a genuine rarity in the compact class — Civic, Corolla, Elantra and Sentra offered none for 2021 — but Mazda's full-color Active Driving Display begins with the Premium package and is standard on the 2.5 Turbo, both well above the volume Select. Available and good, but trim-limited, so mid-band rather than the 80s.

The hardware is fine — IIHS rates LATCH ease of use 'Good+' with two full-featured positions and easy-to-find tethers — but the packaging fights daily family logistics: 35.1 in of rear legroom and just 0.7 in of published rear knee clearance make a rear-facing seat a squeeze behind a tall driver, and the 13.2 cu ft trunk with a narrow sedan aperture struggles with a full-size stroller.

Strong credentials at the price families actually pay: IIHS Top Safety Pick+ and NHTSA five stars overall, with Smart Brake Support, Mazda Radar Cruise Control with Stop & Go, lane-keep assist, lane-departure warning, driver attention alert and high-beam control standard from the $20,500 base sedan. It is held under 80 because the volume trims' non-adaptive headlights rate only 'Acceptable' (the 'Good' lights need Premium or a Turbo), blind-spot monitoring costs the Select package, and no 2021 Mazda3 offers a rear-occupant reminder.

Four adults plus luggage is where this car runs out: the back seat is the segment's tightest, there are no rear air vents, no rear USB port and no rear-seat amenities of any kind, and a 13.2 cu ft trunk means gear rides on laps once four people are aboard. Front-seat comfort and cabin isolation are genuinely good, which keeps it out of the bottom of the band.

A relaxed and low-effort commuter: the six-speed torque-converter automatic gives honest, rubber-band-free tip-in where rivals drone through a CVT, radar cruise with Stop & Go is standard from the base trim for stop-and-go traffic, the driving position is excellent and the cabin is quiet. Docked for a naturally aspirated 2.5 that has to be worked from a standstill through tall gearing, and for over-eager chimes and auto-locking.

Average-for-class running costs, no better: 26/35/30 MPG for the volume 2.5 FWD sedan on regular unleaded is competitive against other geared-automatic compacts but is several MPG behind CVT rivals and nowhere near the hybrids (Corolla Hybrid, Elantra Hybrid) that were already on sale. Consumables are ordinary compact-car items and the tank is small at 13.2 gal.

A compact footprint and a genuinely tight 34.8 ft curb-to-curb turning circle make it easy to thread and U-turn, and reviewers single the turning radius out for praise. It falls short of the top band because the high beltline and thick C-pillars hurt over-the-shoulder vision, a rearview camera is the only aid on volume trims, and parking sensors and the 360-degree monitor are locked to the top Turbo Premium Plus.

Not a work vehicle in any sense: Mazda publishes no US tow rating for the Mazda3, there is no bed or open load area, and the sealed 13.2 cu ft trunk with a 60/40 pass-through is the entire cargo provision. The 186-hp naturally aspirated 2.5 has no capacity to spare under load.

The Skyactiv-G 2.5 and six-speed automatic are conventional, long-proven, low-stress hardware with a solid durability reputation, so the mechanicals would survive high-mileage abuse better than most turbocharged small-displacement rivals. But the car is a passenger compact with soft-touch trim, leatherette upholstery and no wear-friendly or washable interior option, and it has no commercial fleet track record.

Essentially nothing: one 12-volt outlet, no household outlet or onboard power, no tie-downs or cargo-management system, no factory roof rails or hitch on the sedan, and no upfit ecosystem. Genuine Mazda Accessories for 2021 are cosmetic and lifestyle items rather than work equipment.

A good rather than great mile-eater: supportive front seats, above-average cabin isolation for the class, 35 MPG highway giving roughly 396 miles of range on the FWD car's 13.2-gal tank, and radar cruise with Stop & Go standard from the base trim. It is capped by a firm, torsion-beam-axle ride over broken interstate concrete, no lane-centering (only lane-keep assist), and a rear seat that punishes a fourth or fifth occupant over several hours.

i-Activ AWD reachable from the Select package upward is a real advantage over most compact sedans and makes gravel roads and snowy trailheads a non-event. Everything else is pavement-bound, though: 5.5 in of ground clearance, no factory roof rails or crossbars on the sedan, no published tow or roof load rating, no terrain modes and no camping-friendly power or flat-folding provision.

Restrictive by body style and by class standards: 13.2 cu ft is among the smallest trunks in the compact-sedan segment, the opening is narrow, and the 60/40 split fold-down rear seatback is the only flexibility on offer — no underfloor bin, no roof rails, no hitch. Anyone needing to swallow bulky gear should buy the hatchback, which offers 20.1 cu ft behind the rear seats.

The fourth-generation (BP) Mazda3 is the dynamic benchmark of the mainstream compact sedan class — tightly controlled body motions, a planted premium-feeling chassis and G-Vectoring Control Plus smoothing weight transfer mid-corner. It stops short of the top band because the torsion-beam rear axle and the volume Select's all-season 215/45R18 rubber limit ultimate cornering bite against multi-link sport sedans.

Steering is the Mazda3's signature strength and the clearest reason it out-drives its class: quick, linear off-center, naturally weighted and more communicative than any mainstream compact rival — closer to entry-luxury calibration than to Civic, Corolla, Elantra or Jetta.

Pedal feel is firm, progressive and easy to modulate — a consistent Mazda trait and better than the soft, long-travel pedals common in the segment — with 11.61-in ventilated front and 10.43-in solid rear discs. Instrumented 70-0 mph stops on the volume trim's all-season tires are competitive rather than class-leading, so it sits in the upper half of the adequate band.

The 2021 Mazda3 is one of the last compact sedans with a conventional six-speed torque-converter automatic rather than a CVT, and it is a real drivability advantage — crisp, well-timed shifts, honest tip-in and no rubber-band effect under load. The volume 2.5 is linear and vibration-free but unremarkable in output, has to be revved through tall gearing from a standstill, and i-stop restarts are occasionally noticeable.

The geared automatic eliminates the CVT drone that penalizes most of the segment, and the fourth generation's substantial sound insulation keeps the four-cylinder unobtrusive at cruise. It gets audibly buzzy toward its 6,000 rpm power peak because the naturally aspirated 2.5 must be worked to make progress, so it is inoffensive rather than pleasant.

Genuinely tight for a compact sedan and better than the Civic's volume-trim figure — Mazda quotes the same radius for both body styles and both wheel sizes, and reviewers single the turning radius out for praise.

A genuinely driver-centric cockpit: low cowl, well-shaped supportive seat, generous tilt-and-telescope range, retained physical climate and volume controls, and a rotary Commander that keeps eyes up. Held out of the top band because the high beltline and thick rear pillars compromise over-the-shoulder visibility, the volume Select has a manually adjusted driver's seat, and the console dial is the only way to work infotainment at all — the screen never accepts touch.

The Mazda3 is the enthusiast's default recommendation in a segment of appliances — the steering and chassis reward deliberate driving and it is the compact sedan people take the long way home in. The volume naturally aspirated 2.5 is satisfying rather than thrilling at roughly 7.1 s to 60 mph; 2021 is the year the 250-hp AWD Turbo arrived in the sedan and put genuine speed on the menu, but it costs $29,900 and up.

Mazda gives away the expensive stuff at the bottom of the 2021 range: the core i-Activsense suite — radar cruise control with stop-and-go, Smart Brake Support, lane departure warning with lane-keep assist, driver attention alert and high-beam control — is standard on every trim including the new $21,445 2.0 sedan, alongside LED headlights and taillights, an 8.8-inch Mazda Connect display, eight-speaker audio, Apple CarPlay/Android Auto, push-button start, rain-sensing wipers, alloy wheels and (new for 2021) Mazda Connected Services. It stays in the middle band because the new base trim buys that price with a decontented 155 hp 2.0-liter and 16-inch wheels, and because blind-spot monitoring with rear cross-traffic alert, dual-zone climate, heated seats, moonroof, Bose audio and the head-up display all still start at Select or above.

2021 is the strongest bang-for-buck year of this generation. The volume 2.5 S Select lands at $23,645 delivered with 186 hp, a torque-converter six-speed rather than a CVT, a cabin reviewers rate the class benchmark and i-Activ AWD available a rung up — content no direct compact rival matched at the price — while the new 2.5 Turbo put 250 hp, 320 lb-ft and standard AWD into a compact sedan for $30,845, thousands under a comparably quick GTI or Civic Si once AWD is counted. It stops short of the top band on the ledger items: no hybrid variant against a Corolla Hybrid returning close to 50 MPG for similar money, the tightest rear seat and smallest trunk in the class, and an industry-floor 3-year/36,000-mile warranty.

2021 is the widest the fourth-generation Mazda3 sedan lineup ever got: seven trims from $21,445 to $33,395, three distinct power outputs across two engines (155 hp 2.0, 186 hp 2.5, 227/250 hp 2.5 Turbo), and i-Activ AWD offered from Select all the way up and standard on the Turbo — more drivetrain and engine choice than any front-drive-only compact rival offered that year. The remaining gaps are electrification and transmission: no hybrid, plug-in or EV anywhere in the range, and the six-speed manual was hatchback-only.

2021 was the Mazda3's best year of this generation after its 2019 launch — 41,845 US units, up 37.9% off a COVID-depressed 2020 and a figure the nameplate has not matched since. But the absolute number stays niche: the Civic moved roughly 264,000 and the Corolla well over 200,000 the same year, six times the Mazda3's volume, and the Elantra and Sentra also outsold it. A strongly rising, well-regarded minor player rather than a market force.

Mazda punches far above its volume on image — a decade of premium-leaning design and interiors has made it the most aspirational mainstream Japanese brand short of Toyota's durability halo, it holds genuine enthusiast affection as the driver's choice in an appliance segment, and 2021 was the brand's centenary year with US sales up roughly 19% while much of the industry was supply-constrained. Held below the top band because Mazda remains small, dealer coverage and awareness are thinner outside major metros, and its residuals still trail Toyota's.

The 2021 model year sold into the worst buyer's market in modern memory. The semiconductor shortage collapsed inventory through the back half of the year, industry-wide incentive spend fell to record lows — J.D. Power measured average incentives at about 4.3% of transaction price by August 2021 — and compact cars that had historically been discounted were transacting at or above sticker. The Mazda3 avoided the outright market adjustments some rivals carried and Mazda kept regional subvented APR and lease programs running, which is why this clears the bottom band, but a 2021 buyer had very little room to negotiate.

2021 is the third model year of the fourth-generation (BP) Mazda3, which arrived as a 2019 US car — still early in its cycle, with no replacement in sight. It is also a genuine change year rather than a carry-over: Mazda added the 227/250 hp 2.5 Turbo with standard i-Activ AWD, introduced the cheaper 2.0-liter base sedan, and made Mazda Connected Services standard with a three-year trial. A 2021 buyer got current platform tech with no redesign risk on the horizon.

The 2021 Mazda3 is the best-decorated year of this generation and the standing enthusiast recommendation in the class: every 2021-model-year Mazda tested earned the IIHS's top award, and the Mazda3 sedan and hatchback took 2021 TOP SAFETY PICK+ on good ratings in all six crashworthiness tests plus superior front crash prevention. Car and Driver gave it an Editors' Choice award and MotorWeek named it Best Small Car, citing the added refinement and the new AWD and 2.5 Turbo options. It sits at the top of the middle band rather than above it because it is repeatedly the critics' favourite without being the comparison-test winner — the class-trailing rear seat and trunk, the missing hybrid option and the touch-disabled rotary infotainment controller keep costing it head-to-head verdicts against the Civic.