2025 Kia K4

The volume LXS uses the 2.0L Atkinson-cycle MPI four at 147 hp; the optional 1.6L turbo (GT-Line Turbo only) makes 190 hp. Both sit near the bottom of the sedan band.

The volume 2.0L makes 132 lb-ft at a high 4,500 rpm; the turbo's 195 lb-ft arrives from 1,700 rpm but is limited to the top trim.

Instrumented tests of the 2.0L/IVT cluster in the mid-8-second range, slow even for the compact class; the 1.6T is quicker but not the volume configuration.

The 2.0L is smooth and adequate around town but runs out of breath and gets noisy when pushed for merging or passing, typical of the segment's base engines.

Kia's IVT (CVT) uses simulated shift points and is among the better-behaved CVTs, though it still drones under hard throttle; the 1.6T gets a conventional 8-speed automatic.

The K4 sedan is front-wheel drive only on every trim; no AWD is offered.

Two gas engines (2.0L IVT and 1.6T 8-speed on GT-Line Turbo) with no hybrid, PHEV or EV variant, behind Civic/Corolla/Elantra which offer hybrids.

The volume 2.0L IVT is rated 34 MPG combined, competitive with non-hybrid compact sedans.

EPA city rating for the volume 2.0L.

EPA highway rating for the volume 2.0L.

A small 12.4-gallon tank limits range despite good mileage; computed from the manufacturer tank capacity and EPA combined rating.

EPA annual fuel cost estimate for the volume 2.0L on regular gasoline.

Every K4 powertrain, including the 1.6 turbo, is rated for regular unleaded.

NHTSA tested the all-new 2025 K4 sedan and awarded a 5-star overall rating; the only sub-rating below five stars is the 4-star combined frontal crash result.

The 2025 K4 earned an IIHS Top Safety Pick+ under the tougher 2025 criteria with Good ratings in small overlap, updated moderate overlap and updated side tests; held off the very top because LATCH and seat-belt reminders grade only Acceptable and the award applies to vehicles built after January 2025.

Every trim, including the base LX, gets FCA with pedestrian/cyclist/junction-turning detection, Lane Keeping and Lane Following Assist, Smart Cruise Control with Stop & Go and High Beam Assist; blind-spot and rear cross-traffic avoidance are standard from the volume LXS up but absent on the LX, which keeps it just below the top band.

IIHS rates the K4's pedestrian front crash prevention Good but its vehicle-to-vehicle performance only Acceptable in the harder 2.0 test; the GT-Line Turbo can add FCA2 with junction-crossing and evasive steering assist, but the volume trim carries the base system.

From LXS up, the K4 gets intervention-grade Blind-Spot Collision-Avoidance Assist (with parallel exit), Rear Cross-Traffic Collision-Avoidance Assist and Safe Exit Warning; docked because the LX goes without and the Blind-Spot View Monitor camera is optional on the GT-Line Turbo only.

Lane Following Assist — true lane centering — is standard on every K4 trim, ahead of much of the segment; reviewers find Kia's implementation competent on well-marked highways but prone to wander on faded lines and in tighter curves.

Full-speed-range Smart Cruise Control with Stop & Go is standard on every trim, and GT-Line adds Highway Driving Assist (HDA2 optional on GT-Line Turbo); short of the top band because the volume LXS lacks the integrated highway assist.

No hands-free driving system is offered on the 2025 K4; even the optional HDA2 on the GT-Line Turbo requires hands on the wheel.

LED headlights with High Beam Assist are standard, but IIHS rates both headlight variants — the LED reflectors on LX through GT-Line and the LED projectors on GT-Line Turbo — only Acceptable; no Good-rated lamp is available.

The fastback-style body with a high beltline, raked rear glass and thick D-pillars leaves a real over-the-shoulder blind zone; surround-view and blind-spot view cameras are only optional on the top GT-Line Turbo, so the volume trim relies on the rearview camera and blind-spot alerts.

The K4's long wheelbase and generous rear legroom make room for rear-facing seats, but IIHS grades its LATCH hardware only Acceptable, and compact-sedan rear width makes three-across a stretch.

A conventional five-passenger compact sedan with a 60/40-split folding rear bench on every 2025 trim.

The volume LXS has no sunroof, so it gets the full 39.0 in — competitive for a compact sedan, slightly behind the Civic and well behind the Elantra; the sunroof trims lose almost two inches.

Mid-pack for the class, matching the Civic and Elantra.

Kia claims class-leading rear headroom despite the fastback-style roofline; it is level with the Elantra and slightly ahead of the Civic.

Rear legroom is the K4's headline space advantage over the Forte it replaced, ahead of the Civic and Jetta on a 107.1 in wheelbase.

Mid-pack for a compact sedan, a little larger than the Elantra's 14.2 cu ft and a little smaller than the Civic's 14.8 cu ft.

Competitive everyday storage: a floating-bridge centre console with an open shelf below, decent door pockets, and USB-C ports in both rows. There is nothing segment-leading, and the wireless charging pad is reserved for EX and above.

The front seats are better shaped and padded than the Forte's. The rear bench has class-leading legroom but sits low, so thigh support for adults is only fair. Power lumbar and a 10-way driver's seat arrive only at GT-Line.

Reviewers call the ride good and composed, a clear step up from the Forte. The volume trims still use a torsion-beam rear axle, which gets busier over broken pavement than the multi-link setup on the GT-Line trims.

Average to slightly better for a mainstream compact. Reviewers find it 'pretty quiet' at highway cruise, but road noise carries through on coarse surfaces and the 2.0L drones when the IVT holds revs. Acoustic glass is limited to upper trims.

Heated front seats come at the mid trims. GT-Line Turbo adds a heated steering wheel and heated rear seats, with ventilated fronts and memory in its technology package. The volume LXS goes without and has a manual-style climate setup, so the good kit sits at the top of the range.

The 2025 K4 LX is one of the cheapest new sedans in the US, priced level with the Elantra SE and below the Civic LX and Corolla LE.

We treat the EX as the volume trim: it adds the larger panoramic display and heated front seats while staying around $25k. Even the GT-Line Turbo at the top of the range sits in the lower half of the sedan band.

The simple naturally aspirated 2.0L Smartstream four and its IVT should be cheap to service. Kia includes no free scheduled maintenance, so the owner pays for every service from day one; repairs inside the 5-year/60k warranty should be minimal.

Residual forecasts for this new nameplate disagree widely. KBB-style projections put it in the low-to-mid 40s and CarEdge is far more optimistic, so we use a midpoint near 48%, below the Civic and Corolla.

Kia's 5-year/60,000-mile basic warranty is at the top of the segment band, two years longer than Honda's and Toyota's 3/36.

The 10-year/100,000-mile powertrain warranty is the segment ceiling. It applies to the original owner only.

Kia includes no complimentary scheduled maintenance in the US, unlike Hyundai (3 yr/36k) and ToyotaCare (2 yr/25k). Roadside assistance (5 yr/60k) and a Kia Connect trial put it in the 'basic roadside only' band.

$25,185 volume-trim price minus its estimated resale value after 5 years (48% retained, or about $12,089) leaves about $13,096 in depreciation. Add the projected $4,100 in 5-year maintenance and repairs, and owning this vehicle for 5 years costs about $17,196 in total.

The 2025 K4 is the launch year of an all-new nameplate, and the sources disagree: J.D. Power's initial-quality data is excellent, but Consumer Reports' reliability prediction for the K4 is below average and its first-year redesign flag applies squarely to 2025. Proven Forte/Elantra mechanicals under a new body and electrical/infotainment stack keep this out of the bottom band, but mixed signals plus first-year risk put it below the segment median.

Kia is a repeat leader or near-leader among mass-market brands in J.D. Power's Initial Quality Study and runs around or above industry average in dependability, while Consumer Reports places it mid-pack. Legacy reputational drag from Theta II engine campaigns and the immobilizer-theft wave keeps it out of the top-five tier.

As a launch-year car the 2025 K4 collected several early-production campaigns, including one that touches the engine itself — improperly torqued connecting-rod bolts that can cause loss of drive power, remedied by replacing the sub-engine assembly. An instrument-cluster display failure campaign and a seat-belt buckle anchor campaign add to it; none is systemic across the generation, but an engine-replacement recall in year one is more than typical.

The volume 2.0L Smartstream MPi port-injected four with IVT is a low-stress carryover from the Forte/Elantra with years of service and no relation to the Theta II family. The chain-type CVT rates below a conventional automatic on long-term reputation, and the 2025-specific connecting-rod-bolt assembly recall is a launch-year manufacturing blemish that trims the score slightly versus the 2026 car.

The K4 launched with an ambitious cabin for the price — a wide twin-display layout, physical climate and shortcut controls, and a cleaner design than the Forte — that reviewers praised as punching above its class. Lower trims still rely on hard plastics in door cards and console sides, keeping it under the Civic benchmark.

J.D. Power initial-quality results for the K4 are a genuine strength — first among compact cars and near the top of the whole industry on problems in the first 90 days. Some early owners report minor build-quality issues, and launch-year production carries more variation than a mature car, so it stays just below the Civic.

Kia's roughly 775-800 US dealers give solid metro coverage but a thinner rural footprint than Toyota, Honda or the domestics, with service satisfaction near mainstream average. The 10-year/100,000-mile powertrain warranty helps, but Kia offers no complimentary scheduled maintenance, unlike Hyundai.

Mechanical parts are cheap and plentiful because the 2.0L engine and IVT are shared across the high-volume Forte, Elantra, Seltos and Kona family, and independent shops know them well. Body panels, lighting and trim are K4-specific and the nameplate is brand new in 2025, so salvage and aftermarket supply for those pieces is thin.

Kia fits the 12.3-inch centre touchscreen across the whole 2025 K4 range rather than saving the big screen for upper trims. That is generous for a compact sedan.

The ccNC software runs on a faster processor and has a logical, uncluttered layout, and it keeps physical shortcut rows. The 5-inch climate strip on EX and up hides behind the steering-wheel rim and is less practical than buttons.

Wireless Apple CarPlay and Android Auto come standard on all 2025 trims, including the base LX.

Embedded navigation is on GT-Line and up, so most buyers navigate through phone projection. The connected voice assistant handles navigation, climate and media commands competently.

The volume trims have an unbranded six-speaker system that is adequate rather than impressive. The 8-speaker Harman Kardon system with subwoofer is optional on EX/GT-Line and standard only on GT-Line Turbo.

EX and above get a crisp 12.3-inch digital cluster under one curved panel with the touchscreen. The volume LX/LXS have only a small 4-inch TFT between analog gauges, so the full display is not near-standard.

The ccNC system receives over-the-air updates for maps and infotainment software. These are not whole-vehicle updates that add features.

The Kia Connect app provides remote start with climate, lock/unlock, locate and status, though service becomes a subscription after the trial. Digital Key 2.0 with UWB phone-as-key is available on upper trims.

USB-C ports are in both rows on every trim, four in total. Wireless charging comes from EX up, so the volume LXS goes without, and there is no AC outlet.

Remote start is listed across the lineup, a smart key with push-button start is on mid and upper trims, and UWB phone-as-key is available at the top. The base trims keep a conventional key, which holds the score below 80.

A rear camera is standard. Parking sensors, Blind-Spot View Monitor and a Surround View Monitor are confined to the GT-Line Turbo technology package, so the volume trims have the camera and little else.

No head-up display is offered on any 2025 K4 trim, including the GT-Line Turbo.

38.0 in of rear legroom, near the top of the class, leaves room for a rear-facing seat behind an average adult, and the 14.6 cu ft trunk takes a folded stroller. A sedan's lower roof and smaller door openings make loading kids harder than in a crossover.

The 2025 K4 earned an IIHS Top Safety Pick. Every trim gets eight airbags (including rear-side) and a strong standard Drive Wise suite with forward collision avoidance, lane keeping and smart cruise. Blind-spot assist and parking aids cost extra on the cheaper trims.

Generous rear legroom, rear USB-C ports and a mid-pack trunk let four people and their bags travel comfortably. Rear amenities such as heated rear seats are limited to the top trim, which keeps it mid-pack.

The 2.0L/IVT is smooth and shudder-free in stop-and-go, stop-and-go smart cruise is standard, and climate controls stay physical. Merging and passing are leisurely with 147 hp.

Commuting costs are average to good for a gas compact: a cheap port-injected 2.0L, low-cost consumables, and low-30s MPG combined. There is no hybrid K4, unlike the Corolla, Civic and Elantra.

A tight 35.2 ft turning circle helps in town, but at 185.4 in the K4 is the longest mainstream compact sedan. The thick D-pillar limits rear-quarter visibility, and parking sensors are reserved for the top trim.

Not a work vehicle: there is no US tow rating, no bed, and hauling is limited to the 14.6 cu ft trunk plus the folded rear seat.

The simple port-injected Smartstream 2.0L and Kia's 10-year/100,000-mile powertrain warranty are positives. The car is a first-year design with no fleet track record for hard use, and the lower-trim cabin uses cheap plastics.

Essentially no work provisions: no AC outlet, factory hitch, roof rails or washable surfaces.

A competent tourer: quiet at cruise, with standard lane keeping and smart cruise, and Highway Driving Assist on GT-Line and up. The volume trims' modest seat adjustment and the 2.0L's drone on grades hold it back.

Pavement-bound: it is front-wheel drive only, has sedan ground clearance, and has no tow rating or roof rails.

It fits normal luggage: the 14.6 cu ft trunk is mid-pack and 60/40 split-folding seatbacks are standard. Bulky gear is a squeeze through the sedan aperture, and buyers who want real flexibility are pointed at the hatchback.

Reviewers find it spry, with precise steering and a planted feel at speed. Consumer Reports praised its quick speed through the avoidance maneuver. The volume trims' torsion-beam rear is less composed than the GT-Line's multi-link.

The steering is precise and easy to place, but light and short on feedback. Sport mode adds weight rather than feel.

Consumer Reports measured short dry stopping distances in its panic-braking tests. The pedal is tuned for smoothness, but stops are strong for the class.

The volume 2.0L/IVT is smooth and shudder-free at part throttle, and its simulated shifts mask the rubber-band effect, but it is slow, needing 9.6 s to 60. The GT-Line Turbo's 190 hp 1.6T with an 8-speed automatic is far livelier.

The engine is quiet at a cruise, and reviewers say it never sounds intrusive at highway speed. The 2.0L still turns coarse when the IVT holds high revs under hard throttle.

Tight for the class despite the K4's 185.4 in length, and well inside the Civic's roughly 37–38 ft.

The K4 has a low, sporty seating position with good tilt/telescope range, physical HVAC and volume controls below the screens, and a column-mounted gear lever that frees console space. Rear-quarter vision is compromised by the thick D-pillar, and power adjustment arrives only at GT-Line.

In the volume 2.0L/IVT form it is pleasant but forgettable transport. Agile handling helps, but the slow powertrain gives nothing to enjoy, and there is no GT performance variant.

At $21,990 the LX comes with 11 ADAS features, wireless Apple CarPlay/Android Auto and LED lighting, which is strong content for the cheapest price point in the class. It misses the top band because heated seats, dual-zone climate and the full panoramic display are reserved for higher trims.

The range runs from about $23k to $29k delivered and undercuts the Civic and Corolla trim for trim, with class-leading rear space, big screens and the longest warranty. The main drawbacks are the slow 2.0L/IVT and the lack of a hybrid.

There are five well-spaced trims with two powertrains (147-hp 2.0L IVT and 190-hp 1.6T 8AT). The 2025 lineup is sedan-only (the hatchback arrived for 2026), FWD-only, with no hybrid and no performance halo.

In its first full year the K4 sold about 140,500 units, Kia's best-ever compact-sedan year. That is a strong mid-to-upper seller, behind the Corolla and Civic.

Kia's design-led rehabilitation and its record US sales lift its image above Nissan and VW. It stays below Honda and Toyota because of weaker resale and the lingering effect of the theft episode.

Kia routinely offers subvented APR and lease deals on its compacts, and on a car this cheap the buyer benefit is real. As a new launch-year model, though, discounting was lighter than on the run-out Forte.

2025 is the launch year of an all-new nameplate and generation, with current infotainment and ADAS. There is no redesign risk within the ownership horizon.

It is well reviewed and has real awards: IIHS Top Safety Pick, top of its segment in J.D. Power APEAL, and U.S. News Best Compact Car for the Money. Reviewers fault the coarse, slow 2.0L/IVT, so it is rarely the outright comparison winner over the Civic.