Vehicle Data Hub

2021 Kia K5 fuel system problems

57 complaints about fuel system have been filed for the 2021 Kia K5, which is 22% of all its NHTSA complaints. It is the most reported problem area for this model year.

At a glance

Complaints
57 22% of this year's complaints
Typical mileage
113,000 miles 12 complaints with mileage
Crashes and fires
0 and 0
Injuries and deaths
1 and 0

Source: NHTSA owner complaints

When fuel system problems show up

Fuel system complaints by mileage, 2021 Kia K5 Complaints by odometer reading in 20,000-mile steps. The median is about 113,000 miles. 0k to 20k miles: 0 complaints 20k to 40k miles: 0 complaints 40k to 60k miles: 1 complaints 60k to 80k miles: 1 complaints 80k to 100k miles: 3 complaints 100k to 120k miles: 4 complaints 120k to 140k miles: 1 complaints 140k to 160k miles: 1 complaints 160k to 180k miles: 0 complaints 180k to 200k miles: 0 complaints 200k+ miles: 1 complaints 040k80k120k160k200k miles Typical: 113,000 miles
Based on 12 complaints that include mileage. 8% were reported before 60,000 miles. The amber marker shows the median: half of these complaints happened before that mileage.
View the numbers
MileageComplaints
0k to 20k miles0
20k to 40k miles0
40k to 60k miles1
60k to 80k miles1
80k to 100k miles3
100k to 120k miles4
120k to 140k miles1
140k to 160k miles1
160k to 180k miles0
180k to 200k miles0
200k+ miles1

What the data shows

Of the 12 fuel system complaints that report mileage, the median is about 113,000 miles, and 8% were reported before 60,000 miles.

These complaints mention 1 injury.

What owners wrote

The contact owns a 2021 Kia K5. The contact stated while her daughter was driving 60 MPH, there was an abnormal sound coming from the engine, when the gas tank expanded, and the back seat popped up. The contact stated that two teenagers were in the back seat, and one was injured. The contact's daughter pulled over and waited for a short while. The vehicle was restarted; however, the vehicle drove slowly. The vehicle was taken to a dealer; however, the vehicle was not diagnosed.

Reported at 86,000 miles, March 2025 Injury

The contact owns a 2021 Kia K5. The contact received notification of NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The contact stated that while driving approximately 70 MPH, upon further inspection the fuel level was lowering unexpectedly. The check engine warning light was illuminated. The vehicle was taken to a local Auto Zone and was scanned with an OBD2 scanner and diagnosed with a recall-related failure.

Reported at 90,000 miles, July 2026

Other problems reported for the 2021 Kia K5

Fuel system problems in other years

Fuel system problems across all Kia models