Kia K5 problems
149 owner complaints with NHTSA, no active recalls. Here's where owners say it breaks.
Solid reliability overall. Common issues are concentrated in a few systems.
Worth owning if you verify the specific issues below before you buy.
- Electrical system: 39 complaints, classified severe
- Reliability score 7.6/10 — above the segment average
Our read of the federal NHTSA complaint and recall record for this exact year and model — not a substitute for a pre-purchase inspection. How we score.
Top trouble spots 8 categories with 3+ complaints
What owners are saying recent NHTSA-filed complaints · verbatim
Transmission requires total replacement within 5 days of purchase of new car. Vehicle was parked when transmission fluid leak was discovered. It was driven back to the dealer, which is nearby, but this experience has shaken our faith in the safety and build quality of this…
Blower motor stops working, have to take fuse box cover off and move fuse assembly to regain function of blower motor. Replacing fuse only helped for a couple of months.
Ever since I bought my car in July of 2025 cash I’ve been having issues. Shortly after purchasing my car began to stall , lose power repeatedly. I then took to southwest kia in Dallas they told me I had contaminated gas. They charged me $2,000 to clean my fuel lines , replace…
The vehicle experiences severe stalling and loss of power while driving. When attempting to accelerate, the vehicle hesitates, shakes violently, and will not accelerate beyond approximately 10–20 mph. The vehicle then stalls completely and shuts off. These failures occur both…
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
Common questions
Is the 2021 Kia K5 reliable?
Mostly yes. With a reliability score of 7.6 out of 10 based on 149 owner complaints filed with NHTSA, the 2021 Kia K5 is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2021 Kia K5?
The 2021 Kia K5 is acceptable, with specific caveats. Worth owning if you verify the specific issues below before you buy. The record behind that call: Electrical system: 39 complaints, classified severe; Reliability score 7.6/10 — above the segment average. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What's the most common problem on the 2021 Kia K5?
Based on NHTSA records, the most-reported issue is electrical, with 39 complaints filed. Typical failure occurs around 17,676 miles. Average repair cost runs about $850 at an independent shop.
What's the most expensive thing that goes wrong?
The airbags is one of the costlier repair items. Average repair cost runs about $1,100 at an independent shop. Typical failure occurs around 5,550 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Kia K5 has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2021 Kia K5?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 149 complaints on file and the costliest repair averaging $1,100, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.