Vehicle Data Hub

2021 Kia K5 problems

The 2021 Kia K5 has 265 complaints on file with NHTSA. The largest share (22%) concerns fuel system. After that come electrical system (17%) and engine (12%).

At a glance

Complaints
265 filed with NHTSA
Most reported
Fuel system 22% of complaints
Crashes and fires
9 and 3
Injuries and deaths
9 and 1
Typical mileage
52,000 miles 49 complaints with mileage

Source: NHTSA owner complaints

Where the complaints are

Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.

When problems show up

Complaints by mileage, 2021 Kia K5 Complaints by odometer reading in 20,000-mile steps. The median is about 52,000 miles. 0k to 20k miles: 19 complaints 20k to 40k miles: 3 complaints 40k to 60k miles: 7 complaints 60k to 80k miles: 1 complaints 80k to 100k miles: 7 complaints 100k to 120k miles: 6 complaints 120k to 140k miles: 3 complaints 140k to 160k miles: 1 complaints 160k to 180k miles: 0 complaints 180k to 200k miles: 0 complaints 200k+ miles: 2 complaints 040k80k120k160k200k miles Typical: 52,000 miles
Based on 49 complaints that include mileage. 59% 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 miles19
20k to 40k miles3
40k to 60k miles7
60k to 80k miles1
80k to 100k miles7
100k to 120k miles6
120k to 140k miles3
140k to 160k miles1
160k to 180k miles0
180k to 200k miles0
200k+ miles2

What the data shows

Among the 49 complaints that report mileage, the typical (median) problem appeared at about 52,000 miles. For fuel system specifically, the median reported mileage is about 113,000 miles (12 complaints with mileage).

Safety-related details: 9 complaints mention a crash; 3 complaints mention a fire; 9 injuries reported; 1 death reported.

Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2021 ranks 1st most-complained-about out of 5 model years of the Kia K5 with enough data (265 complaints in that window). It is also covered by 6 safety recall campaigns.

What owners wrote

A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.

While on her way from work, my mother was involved in an accident in her 2021 Kia K5 LXS where she was rear ended at a high speed by a driver not paying attention to the road and she ended up hitting the car in front of her. During the accident NONE OF THE AIRBAGS DEVELOPED. My mother was hospitalized for a month and do to the SEVERITY OF HER MAJOR INJURIES (rib fractures, a closed fracture of her T7-T8 with loss of sensation and mobility of lower half of body) she passed away from “Effects Of Blunt Spinal And Rib…

February 2022 CrashInjuryDeath

I was rearended into another vehicle at a speed of about 50mph, then rearended again by and SUV, not one of my 9 airbags deployed.

January 2023 CrashInjury

Was driving to work on freeway and a deer jumped out in front of car, I hit it between 65-70 MPH and not one of the many airbags installed on this brand new car deployed . The police officer at the scene said I'm lucky to be alive.

Reported at 1,100 miles, November 2020 CrashInjury

The contact owns a 2021 Kia K5. The contact stated that there was an abnormal odor of fuel. The check engine light was illuminated. The contact received the recall notice for NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline). An unknown local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 200,000.

Reported at 200,000 miles, March 2026

The contact owns a 2021 Kia K5. The contact stated that the driver-side turn signal became inoperable. The vehicle was shifting hard and/or not shifting at all. While driving at unknown speeds, the vehicle shut down. The turn signal and brake lights were illuminated. The contact stated there was a recall for NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline). The vehicle was taken to the local dealer for diagnosis of the signal light. The vehicle was repaired, but the failure recurred.

Reported at 56,000 miles, September 2025

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