How common are transmission and powertrain problems on the 2018 Kia Niro?

NHTSA lists 19 Transmission & Powertrain complaints for the 2018 Niro, which is 32% of the 60 total complaints filed for that model year.

Is there a recall for the 2018 Kia Niro's transmission?

Yes. Recall 23V534000 covers 2017-2022 Niro and 2018-2022 Niro Plug-in Hybrid vehicles for a hydraulic clutch actuator that can leak fluid onto its circuit board, which can result in an engine issue. Dealers inspect and replace the actuator and install a new fuse.

At what mileage do these transmission problems typically show up?

The median mileage at failure reported to NHTSA for this problem area is 113,831 miles.

Did the transmission recall involve crashes or fires?

No. NHTSA data for this problem area on the 2018 Niro shows 0 crashes, 0 fires, and 0 injuries.

Was the 2018 Niro worse for this issue than other model years?

The 2018 Niro's 19 complaints represent 32% of its total complaints, compared to 39% for 2019, 23% for 2017, and lower shares of 21% or less for 2020 through 2025.

2018 Kia Niro Transmission & Powertrain Problems

NHTSA lists 19 Transmission & Powertrain complaints for the 2018 Kia Niro, 32% of its 60 total complaints for the year, with a median failure mileage of 113,831. A related recall (23V534000) covers a hydraulic clutch actuator fluid leak that can cause engine stalling.

Transmission & Powertrain complaints: 19; 32% of 60
Crashes reported: 0
Fires reported: 0
Injuries reported: 0
Median mileage: 113,832 mi
Related recalls: 1

Typical transmission symptoms owners report

Owners report sudden loss of power while driving, with the vehicle failing to accelerate even with the gas pedal pressed, sometimes resolved temporarily by cycling the engine off and on.
Some describe the vehicle refusing to shift out of neutral, accompanied by a check engine light and a P090B diagnostic code.
Multiple owners report repeated random malfunctions where the car will not drive, gears fail to shift properly, and the engine revs up and down while in park.
Several owners received recall notice 23V534000 for the hydraulic clutch actuator but reported the replacement part was unavailable for an extended period.
One owner reported a failed hydraulic clutch actuator (HCA) that was diagnosed during a dealer inspection.
One owner reported the vehicle failed to restart with the hybrid system warning light illuminated, and dealers could not initially determine the cause.

When 2018 Kia Niro transmission complaints were filed

First complaint Jun 24, 2019, latest Sep 15, 2026.

19 complaints filed with NHTSA from Jun 2019 to Sep 2026; peak Jan 2024 (4).

Transmission & Powertrain recalls for the 2018 Kia Niro

NHTSA 23V534000Jul 31, 2023Transmission & Powertrain121,411 vehicles
Power train:automatic transmission:internal:clutches/bands:actuators/solenoids
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.
Risk: A fire increases the risk of injury.
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.

Transmission & Powertrain complaints by Niro model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

201719 (23%)
201819 (32%)
201922 (39%)
20208 (21%)
20213 (33%)
20224 (13%)
20236 (14%)
20241 (11%)
20251 (6%)

Frequently asked questions

How common are transmission and powertrain problems on the 2018 Kia Niro?: NHTSA lists 19 Transmission & Powertrain complaints for the 2018 Niro, which is 32% of the 60 total complaints filed for that model year.
Is there a recall for the 2018 Kia Niro's transmission?: Yes. Recall 23V534000 covers 2017-2022 Niro and 2018-2022 Niro Plug-in Hybrid vehicles for a hydraulic clutch actuator that can leak fluid onto its circuit board, which can result in an engine issue. Dealers inspect and replace the actuator and install a new fuse.
At what mileage do these transmission problems typically show up?: The median mileage at failure reported to NHTSA for this problem area is 113,831 miles.
Did the transmission recall involve crashes or fires?: No. NHTSA data for this problem area on the 2018 Niro shows 0 crashes, 0 fires, and 0 injuries.
Was the 2018 Niro worse for this issue than other model years?: The 2018 Niro's 19 complaints represent 32% of its total complaints, compared to 39% for 2019, 23% for 2017, and lower shares of 21% or less for 2020 through 2025.