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SeatsPart report

2021 Kia K5 Seats Problems

Complaints
8about this part
Share
5%of 169 total for the year
Median mileage
86,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 8 complaints about the seats of the 2021 Kia K5, 5% of the 169 complaints for this model year. Where a mileage was given, the median is 86,000 miles. 1 of these say a crash was involved, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I was traveling 45 MPH in my 2021 K5 gt line when an older toyota camry crossed my path. I applied brakes but there was no avoiding the collision. I broadsided the camry at somewhere between 30 and 35 MPH. I sustained injuries to both knees, neck and back. Air bags did not deploy. Police, wrecker driver and body shop (in thier previous experiences) all say they are surprised the air bags were not triggered being the fact it was a frontal collision. Another concern is the folding seat behind the driver's side broke free of the latch and folded itself down. …”

NHTSA complaint #11399278, filed 2021-03, 10,000 miles

“When I was driving I heard big boom sounds in my backseat which ended up being my fuel tank which expanded and raised the back seat. It slowly got worse impacting my car’s fuel sensor and the tank expanded more and more I drove.”

NHTSA complaint #11594072, filed 2024-06

“I have experienced consistent electrical issues with my drivers side door panel on my 2021 Kia K5. The lights on the panel will flash off and on intermittently, the windows will not roll down, and doors will not lock/unlock, posing an entrapment risk. Additionally, when this panel malfunctions, my power seat will move and adjust (sometimes while I am driving and the vehicle is in motion) back to original settings instead of remaining in the settings I've saved for my vehicle; fully unintended motion of course. …”

NHTSA complaint #11735605, filed 2026-05

“I was driving down the highway and my car made a loud bang noise. It would not accelerate over 50 mph no matter how hard I pressed the accelerator. Took to dealership and they told me I needed a new battery and charged me $365. Drove it and still won’t go over 50 mph. They kept it for a week and said it had a faulty valve that caused pressure to make the gas tank expand, pushing up back seat. Said it wasn’t a recall and would cost me $3600 to fix. Told me it was too dangerous to drive. Did research and saw that this was discovered over 2 years ago but I was never told. …”

NHTSA complaint #11685517, filed 2025-09

“The contact owns a 2021 Kia K5. The contact stated that there were failures with the spark plugs. While driving at an undisclosed speed, the vehicle shuddered, and the engine sputtered. The contact stated that fuel spewed out of the filler neck while refueling the vehicle, and the fuel gauge incorrectly indicated that the fuel tank was empty after refueling. Additionally, there was an abnormal egg and sulfur odor coming from the vehicle with the check engine warning light intermittently illuminated. …”

NHTSA complaint #11752163, filed 2026-07, 120,000 miles

Related service bulletins

Seats: other model years

YearComplaintsShare of year
202413%
202355%
202286%
202185%

Other parts of the 2021 Kia K5

Fuel system
57 complaints
Electrical system
46 complaints
Other or unknown
32 complaints
Engine
30 complaints
Transmission and drivetrain
19 complaints
Air bags
10 complaints
Brakes
10 complaints
Body and structure
10 complaints
Forward collision avoidance
9 complaints
Lane departure
9 complaints
Steering
7 complaints
Visibility (wipers, defrost, mirrors)
5 complaints

← All problems reported for the 2021 Kia K5

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology