Kia K4 — All Years
We have Kia K4 specifications on file for 2 model years, 2025–2026, covering saloon/sedan trims. Across those years EPA data lists 2 different engines. Combined fuel economy runs from 34 to 40 mpg (UK) depending on year, engine and transmission. 2 of the 2 rated model years hold an overall 5-star NHTSA rating. Select a year below for full engine, fuel economy, dimensions and safety data.
| Year | Engine(s) | Fuel | MPG (UK) | CO₂ g/km | NHTSA | Recalls | Complaints |
|---|---|---|---|---|---|---|---|
| 2026 | 1.6L 4-cyl turbo / 2L 4-cyl | Regular Gasoline | 34–40 | 167 | 5★ | 0 | 12 |
| 2025 | 1.6L 4-cyl turbo / 2L 4-cyl | Regular Gasoline | 35–40 | 170 | 5★ | 2 | 46 |
Engine History
- 1.6L 4-cyl turbo — 2025–2026
- 2L 4-cyl — 2025–2026
Engines are those EPA lists for each model year; the MPG (UK) column shows the range across configurations where more than one exists.
Frequently Asked Questions
What years is the Kia K4 covered on this site?
We have data for 2 model years of the Kia K4, from 2025 to 2026.
What engines does the Kia K4 come with?
EPA data lists: 1.6L 4-cyl turbo (2025–2026); 2L 4-cyl (2025–2026).
Which Kia K4 year has the best fuel economy?
The 2026 model returns the highest combined MPG (UK) on record here, at 40 mpg on its most efficient configuration.
Does the Kia K4 have a 5-star NHTSA safety rating?
Yes — the 2025, 2026 model years hold an overall 5-star NHTSA rating on record here.
Which Kia K4 model years have the most recalls and complaints?
The 2025 model year has the most NHTSA recall campaigns on record (2), and the 2025 has the most owner complaints (46). NHTSA lists no recalls for 2026. Counts are from NHTSA as of 6 October 2026 and change over time; complaints are unverified owner reports.
What body style is the Kia K4?
The Kia K4 is classed as a saloon/sedan on this site.
As an Amazon Associate and CJ Affiliate and AWIN publisher we earn from qualifying purchases. Links below are affiliate links.
Popular Kia K4 Accessories
Last updated: