2018 Kia Niro: problems, recalls and reliability
3 recalls and 69 owner complaints on record; the weakest area is power train (31% of complaints).
Data updated weekly · 1 new complaint in the last 90 days · latest recall Jul 2023
All counts are reports filed with NHTSA in the United States - US market only, not worldwide totals.
Common problems
Computed from 69 owner complaints filed with NHTSA for this exact model year.
“The vehicle just shut down as I exited. The power and gas pressure decreased. Pulled over to see if my hybrid battery was defective or drained. It wasn't. A notification popped up and said "Hybrid Control System or Low Voltage DC/DC Converter, Contact dealer for service. Finally got it towed to Kia of Valencia the next day and they said it was "Hydraulic Clutch Actuator" and they want charge me $2200 to fix it. But looking up the part, it says there's a recall for that exact problem.”Owner report · Vehicle Speed Control · May 2026
“Driver heated seat shorted out and caused burn to leg. System has not been repaired, will wait to hear from Kia Customer Affairs prior to decision to repair. I was injured by this and have concerns about the safety of the vehicle, will this happen again if a new grid is installed. Kia dealership confirmed that the grid showed high resistivity but also claimed since nothing is melted I couldn't have been burned. The vehicle has only been inspected by the dealership currently. there were and are no indicators, warning lights or messages about the failure available. Kia dealerships claims there no way to tell with the electrical systems.”Owner report · Electrical System · Dec 2025
“I'm 59 years old never have an accident or had to slam breaks on the guy in front of me slammed his breaks on so I did the same time the brake pedal was to the floor the car didn't even slowed down and not even skid marks hit him then air bags deployed the car was totaled no one got hurt thank God I do t know if any other kia cars had this problem I got real lucky”Owner report · Service Brakes · Apr 2025
Show 7 more owner reports
“Known issues with wiring cause check engine light to come on and also now the door open sensors to stay on. Just paid $800 for a known issue to the wiring that a Kia technical bulletin wss issued for, however the cost was left to the customer.”Owner report · Engine · Jan 2025
“Hydraulic Clutch Actuator recall was previously done and only a fuse was changed as the inspection only determined the actuator itself did not have an active code. 4 months has gone by and now the actuator has now failed.”Owner report · Electrical System · Jan 2025
“Internal combustion engine coolant leaking out exhaust. The heat exchanger located in the catalytic converter system is leaking, leading to the ICE coolant draining. This leads to the engine overheating, and damage. Signs of the issue started with the coolant level lowering quickly, then the car heater stopped working. This confirmed by an independent mechanic.”Owner report · Engine · Oct 2024
“The contact owns a 2018 Kia Niro. The contact stated that while operating the vehicle, the vehicle failed to shift out of neutral while shifting the gear shift lever. The check engine warning light was illuminated. The vehicle was towed to an independent mechanic where it was diagnosed and the DTC code: P090B:73 error was retrieved. In addition, the contact stated that an unknown message was displayed. The local dealer was contacted and informed the contact that the failure was related to an unidentified recall; however, the VIN was not included. The manufacturer was not made aware of the failure. The failure mileage was approximately 136,663.”Owner report · Power Train · Sep 2024
“hybrid battery warning paid out of pocket for towing, car still at the dealership, loss of income and wages, been treated with awful customer services, and paying out of pocket. Car went in on June 25”Owner report · Fuel/Propulsion System · Jun 2024
“The contact owns a 2018 Kia Niro. The contact stated that upon starting the vehicle, the vehicle was shuddering and failed to start. The battery charge was low. The HEV warning light was illuminated. The vehicle was taken to the local dealer but was not diagnosed or repaired. The dealer informed the contact that a field expert would be determining the cause of the failure. The manufacturer was not contacted. The failure mileage was 140,000.”Owner report · Electrical System · May 2024
“Coolant leak within the heat exchanger of the catalytic converter. Increases likelihood of overheating and engine damage. Especially when driving long distances, or within heavy traffic. Increases emissions as burning off coolant within exhaust.”Owner report · Engine · Mar 2024
When filing, owners marked a crash in 5 of these complaints and injuries in 4 - self-reported to NHTSA, not verified accident statistics.
Recalls - 3 campaigns
Kia Motors America (Kia) is recalling certain 2017-2018 Kia Niro hybrid electric vehicles. The Main Relay within the Power Relay Assembly (PRA) may have inadequate connections between its contacts, causing increased electrical resistance.
Remedy: Kia will notify owners, and dealers will inspect the Power Relay Assembly (PRA) for damage. If no damage is found, the main relay will be replaced. If damage is found, the PRA will be replaced. These repairs will be performed free of charge. The recall began November 23, 2018. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC168.
Kia Motors America (Kia) is recalling certain 2017-2018 Kia Niro hybrid electric vehicles previously recalled under recall 18V-666. The Main Relay within the Power Relay Assembly (PRA) may have inadequate connections between its contacts, causing increased electrical resistance, which can overheat the rear seats.
Remedy: Dealers will inspect the PRA and replace either the PRA or the Main Relay, as necessary, free of charge. Owner notification letters were mailed January 9, 2023. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC256. This recall supersedes NHTSA recall number 18V-666. Vehicles already repaired under the previous recall will need to have the new remedy completed.
Kia America, Inc. (Kia) is recalling certain 2017-2022 Niro and 2018-2022 Niro Plug-in Hybrid vehicles. Fluid may leak into the printed circuit board inside the hydraulic clutch actuator, which can result in an engine compartment fire.
Remedy: Dealers will inspect and replace the hydraulic clutch actuator as necessary and install a new fuse, free of charge. Owner notification letters were mailed December 29, 2023. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC276.
How other years compare
Check your exact Niro by VIN
Recalls and equipment differ between individual vehicles. Decode your VIN to see what applies to yours.
Open VIN decoderFrequently asked questions
Is the 2018 Kia Niro reliable?
NHTSA has 69 owner complaints and 3 recall campaigns on record for the 2018 Kia Niro. The most complained-about area is power train (31% of complaints).
At what mileage do 2018 Kia Niro problems usually appear?
Half of the complaints that mention mileage were filed at 24,500 miles or less.
Does the 2018 Kia Niro have open recalls?
3 recall campaigns have been issued, the latest concerning hybrid propulsion system. Check your specific vehicle by VIN - recall repairs are free at franchised dealers.
Source: NHTSA recall campaigns and owner complaints (public domain). Counts reflect reports on file and are not a defect rate.