Kia K4 years to avoid and best years
The Kia K4 2025 and 2026 model years are too early to compare: none has had 3 full years on the road yet.
Data as of .
2025–26
Kia K4 reliability by year
Each year is complaints filed in that year’s first 3 years on the road, divided by however many of those years have passed. A model year younger than 3 years is too early to compare, so it is left out of the years named as having the fewest or the most complaints. Recalls are a separate count. The numbers are for the US-market Kia K4. How we count.
By model year
| Year | Per year on the road | Complaints | Recalls | Most-filed complaint | Avg. combined MPG |
|---|---|---|---|---|---|
| 2026 Too early | 0 | 0 | 1 | — | 30.4 |
| 2025 → Too early | 23 | 45 | 2 | Electrical system | 32 |
Years with a → link have a full model-year page.
What owners file about
Generations
- Body styles
- Sedan, Hatchback
- Oil
- SAE 0W-20 full synthetic (Smartstream G2.0 and 1.6T)
- Tire size
- 205/55R16 (16-inch), 225/45R17 (17-inch), 235/40R18 (18-inch GT-Line)
Known issues for this generation
Recall 25V-548 covers certain 2025 K4 and Sorento vehicles. NHTSA states that connecting rod bolts in the engine may have been improperly tightened, which can cause a loss of drive power; dealers replace the sub engine assembly. The campaign lists 30 vehicles across those two model lines. Recall 26V-046 covers certain 2025 Kia K4 vehicles among a larger multi-model group; due to a software error, the instrument panel display may fail, and the display software is updated over-the-air or by a dealer (42,677 vehicles across the listed models). Recall 26V-135 covers certain 2026 Kia K4 vehicles whose rear center seat belt anchor buckle may not latch properly; dealers inspect and replace the anchor buckle assembly as necessary. That campaign lists 14,870 vehicles and also includes 2027 Telluride third-row buckles.
Frequently asked questions
Which Kia K4 years are too early to compare?
The Kia K4 2025 and 2026 model years are too early to compare: none has had 3 full years on the road yet.
What oil does a 2025 Kia K4 take?
SAE 0W-20 full synthetic is specified for the Smartstream engines; capacity differs by engine (about 4.5 qt with filter on the 2.0L). Confirm the under-hood label and owner’s manual for your VIN.
What tire sizes fit the Kia K4?
Trim-dependent OE sizes on the record include 205/55R16, 225/45R17, and 235/40R18 on GT-Line; always match the door-jamb tire placard for your trim.
What NHTSA recalls mention the Kia K4?
Documented campaigns on the generation include 25V-548, 26V-046, and 26V-135; check your VIN with Kia or NHTSA because unit counts and model lists vary by campaign.