The rear brake rotors on the vehicle are pitted, as confirmed by a local repair shop. The "incident" is ongoing. Kia refuses to repair or replace them under warranty (25,500 miles on the car), claiming they are wear item. However, pitting is not wear, in fact quite the opposite. My analysis (30+ yrs in the auto business): As an EV, regenerative braking means the actual brake systems are rarely used. Noise at low speeds prompted the inspection at a local shop. Braking under high speeds does not result in noise, telling me the system relies too heavily on the front brakes. The result is the rear rotors are too often unused leaving them to rust and then pit. Tesla recognizes that regen braking can actually harm brake rotors, suggesting burnishing the brakes at times using the following procedure: 1) Drive the vehicle at approximately 50 mph - 55 mph (80 km/h - 90 km/h) on a straight road. 2) Apply moderate, consistent pressure to the brake pedal to slowly decelerate the vehicle, releasing at 10 mph (15 km/h). 3) Repeat this procedure 6 times, waiting at least 30 seconds between applications. Since the rear brakes do not appear to engage on the Kia Niro, this method is fruitless. Other Niro drivers report this as seen here: [XXX] I my opinion, the vehicles should at minimum be repaired under warranty or recalled to "rebalance" the brake system. Thank you... INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The worst 2021 Kia Niro EV problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Brakes1
- Driver assistance1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Brakes1
- Driver assistance1
Recalls 1
Back over prevention: sensing system: camera
- What is wrong
- Kia America, Inc. (Kia) is recalling certain 2020-2022 Niro EV vehicles. The circuit board for the rearview camera may become damaged and cause the rearview camera image not to display. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
- Risk
- A rearview image that does not display reduces the driver's view of what is behind the vehicle, increasing the risk of a crash.
- Remedy
- Dealers will replace the rearview camera, free of charge. Owner notification letters were mailed November 7, 2025. Owners may contact Kia customer service at 1‑800‑333‑4542. Kia's number for this recall is SC342.
Recall number 25V426000 · Recall details
See all 1 recalls for the 2021 Kia Niro EV
Defect investigations
Pedestrian alert sounds
the federal safety agency received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, the federal safety agency opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified the federal safety agency he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by the federal safety agency regarding the subject matter of the petition.
DP22005
Technical service bulletins for the 2021 Kia Niro EV 43
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Partial repair – electrical a/c compressor
- Bsa replacement (PI2603Y)
- Owner notification (PI2603)
- Dealer principal memo (PI2603)
- Dealer parts and service manager memo (PI2603)
- Question and answer (PI2603)
- Infotainment system software update using update.kia.com
- Infotainment software update procedure
- Pitstop: technical operations: external damage to ultrasonic sensor
- Voluntary service campaign: owner renotification (SC321)
What 2021 Kia Niro EV owners say
Most recent owner complaints, unedited.
I'm a new Niro Ev driver. The VESS noise when reversing the vehicle is very loud. It is too loud, I live in close proximity to neighbors and have to get up early for work and the sound is a major nuisance, I would not want a neighbor that has this car . I understand VESS in place for safety but the reverse backup beeping is just a step down from a garbage truck backing up, especially in the silence of a residential neighborhood in the early AM hours. Furthermore, I and others as seen on web forums will reverse faster than we normally would do to be able to take the car out of reverse as quickly as possible to stop the blaring beeping. This creates its own risk, as if there is less time to react if there is a pedestrian behind the vehicle. The volume of the noise should be greatly reduced. It is also unnecessary noise pollution. Kia, please fix this.
Compare the 2021 Kia Niro EV
Other model years
Questions about the 2021 Kia Niro EV
Is the 2021 Kia Niro EV reliable?
Owners have filed 2 complaints about the 2021 Kia Niro EV, fewer than a typical Niro EV model year.
What is the 2021 Kia Niro EV year score?
The 2021 Kia Niro EV scores 95 out of 100 (good). The score compares it with the other model years of the Kia Niro EV: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2021 Kia Niro EV?
Brakes, with 1 complaint. Next is driver assistance (1).
How many recalls does the 2021 Kia Niro EV have?
1 recall, covering back over prevention.
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