Problems · NHTSA complaints

2020 Kia Niro problems

Owners filed 19 complaints about the 2020 Kia Niro with NHTSA between Dec 2020 and Sep 2026. The most-cited component is electrical system (6).

Complaints
19
Filed with NHTSA
Crashes
1
Reported by owners
Fires
0
Reported by owners
Injuries
0
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Electrical system6
  2. Fuel/propulsion system3
  3. Power train3
  4. Lane departure2
  5. Back over prevention1
  6. Engine and engine cooling1
  7. Visibility/wiper1
  8. Steering1
  9. Wheels1
  10. Service brakes1
  11. Vehicle speed control1
  12. Forward collision avoidance1
  13. Other / unknown8

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Oct 30, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20201
20213
20220
20233
20244
20254
20264

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Electrical system

6 reports
“The contact owns a 2020 Kia Niro. The contact stated that while driving at an undisclosed speed, the coolant system warning light illuminated. The contact stated that after entering the vehicle following a charging session, there was a burning odor coming from the vehicle while the coolant system warning light was illuminated. The contact stated that the 12-volt battery voltage decreased from 12 volts to 2 volts. The vehicle was taken to the dealer several times, and TSB: ELE270 was associated with the issue. The contact was informed that the inverter coolant pipes had failed and needed to be replaced, and that the BSC-1 coolant needed to be replaced with BSC-2 coolant. The vehicle was repaired; however, the failure recurred. The contact stated that the coolant system warning light was illuminated after the vehicle was returned. The contact was concerned that the vehicle posed a fire risk because the vehicle was being charged in the garage at the residence. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 58,000.”
Owner complaint to NHTSAFiled Sep 3, 2026Electrical systemODI 11761948

Fuel/propulsion system

3 reports
“About 7 months ago, "Refill Inverter Coolant" warning came up. Since then, I've scheduled service appoitment wtih Van Nuys Kia dealership 5 times to resolve this issue, but even after recent appoitment 2 weeks ago, this warning is still came up on my dashboard. Every time I start the car, the persistent refill inverter coolant light comes on. I believe I am experiencing this issue because KIA and their dealership where I bought my car doesn't want take ownership of this issue and resolve it. I am deeply concerned about my safety and the safety of my children when I drive my Kia vehicle.”
Owner complaint to NHTSAFiled Jan 1, 2025Electrical system, Unknown or other, Fuel/propulsion systemODI 11633536

Power train

3 reports1 related recall
“Faulty EPCU and circuit board damaged from coolant leak, as described by Kia technician. Other components have been affected. Estimated $3,000 in parts left to replace. Total repair cost is looking to exceed $13,000. On last failure of car, I was driving as the Electical Vehicle Systems error occurred and the car went into neutral and when it slowed down, went into Park. Car would start and drive 10-15 feet before becoming inoperable again. Dealership says they fixed by adding coolant and they couldn't replicate the error. It took me 200 ft of driving to do it. I turned on the AC and the error happened. Could have been coincidental. Kia has declined/refused repairs because serious fault happened at 60,800 miles and they say its out of warranty. Issue had been going on for about 30,000 miles at that point with no resolution ever being reached. Car has been throwing errors and codes and repeated attempts to have Kia check my car for the recall that had been issued were ignored and i was told the recall wasnt the issue. April 29, 2023 was the first time I contacted Kia service about the Low Inverter Coolant message I was getting. Kia insisted that coolant just…”
Owner complaint to NHTSAFiled Feb 2, 2024Power train, Electrical system, Fuel/propulsion systemODI 11569415

Lane departure

2 reports1 crash
“Driving in my 2020 Kia Niro EV EX in the right lane of a 2-lane northbound highway at 3PM on a weekday, clear-weather, I changed lanes into the left lane when all of the sudden the Lane Keeping Assist malfunctioned and startlingly and abruptly jerked me across the double yellow lines into oncoming southbound traffic. I tried to steer the car back into the northbound lanes but the steering wheel was frozen. The malfunctioning Lane Keeping Assist seemed to have completely taken control of the steering wheel. An oncoming southbound car hit me colliding with my front passenger hood, panel and front passenger wheel. Upon impact, my dashboard lit up with warning messages, as the collision sent my car sailing back into the northbound side of the highway crashing perpendicularly into the highway perimeter chainlink fence and parking post. My airbags did NOT deploy! That is 100% airbag failure in a front wheel collision in a front-wheel drive vehicle. Police report taken at site of the incident. My insurance was notified. Insurance advised me to report these mechanical malfunctions to the Kia dealership. I reported to Kia Van Nuys dealership who set up service…”
Owner complaint to NHTSAFiled Nov 23, 2021Lane departureCrash reportedODI 11441412

Back over prevention

1 report
“The contact owns a 2020 Kia Niro EV. The contact stated that the rearview camera intermittently failed to display an image when the vehicle was shifted into reverse. The contact stated that reverse engaged normally, and the audible alert was sounded; however, the display screen periodically remained blank. The contact stated that the failure was intermittent but had occurred several times. The contact stated that the rearview camera operated properly for a while before the failure reoccurred. The vehicle was taken to a dealer prior to the expiration of the warranty. The dealer was unable to duplicate the failure, and the vehicle was not repaired. The manufacturer was notified of the failure and suggested that the vehicle be taken for additional diagnostic tests, and the dealer would consult with technical assistance from the manufacturer to determine how to repair the vehicle. The failure mileage was approximately 11,000.”
Owner complaint to NHTSAFiled Jun 22, 2026Back over preventionODI 11745741

Engine and engine cooling

1 report
“The contact owns a 2021 Kia Niro. The contact stated that when the vehicle was started, the refill inverter coolant warning light illuminated. In addition, the contact stated that the refill inverter warning light illuminated while driving the vehicle. The vehicle was taken to the dealer where it was diagnosed with debris and corrosion in the inverters and electronic water pump. The contact was informed that the radiator and the water pump needed to be replaced. The vehicle was not repaired. The contact stated that in November 2023, the contact received Technical Service Bulletin: SA512, and the dealer attempted four times to perform the repair but was unsuccessful. In addition, the contact stated that the dealer who performed the Technical Service Bulletin: SA512, had not diagnosed the vehicle. The vehicle was taken to an alternate dealer, who investigated and informed the contact that the Technical Service Bulletin: SA512, repair was not properly performed, and stated that this was the reason for the corrosion and debris in the water pump. The manufacturer was made aware of the failure, and a case was filed. The contact stated that a buy-back by the…”
Owner complaint to NHTSAFiled Jul 21, 2025Engine and engine coolingODI 11675157
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 30, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.