2018 Hyundai Ioniq Hybrid Transmission and drivetrain Problems
- Complaints
- 3about this part
- Share
- 23%of 13 total for the year
- Median mileage
- 18,300miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the transmission and drivetrain of the 2018 Hyundai Ioniq Hybrid, 23% of the 13 complaints for this model year. Where a mileage was given, the median is 18,300 miles. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The car shifts from drive mode into sport mode by itself without the driver manually moving the gear shift from drive to sport. This happens randomly, but always when the car is in motion and always in a low gear( usually first gear ). It has happened both when making a turn and going straight ahead , usually when the car starts to move after being stopped like at a traffic light. I can get the car to go back into drive mode by physically moving the gearshift into sport mode and then back into drive mode again. …”
NHTSA complaint #11208212, filed 2019-05, 18,300 miles“The clutch failed and the clutch and I believe the clutch actuator had to be replaced. It was not available for inspection upon request. My safety and the risk of others were compromised by the constant jerking and sputtering, of the gears that took place during vehicle operation. My acceleration was laggy and at some points nearly unresponsive. The vehicle was inspected by service technicians. A warning light saying: Warning please check Hybrid Driving System, Do not drive vehicle was illuminated. Mid to late October 2023”
NHTSA complaint #11619309, filed 2024-10“There is a defect with the transmission control module (TCM) and dual-clutch transmission (DCT). This defect prevents the car from properly accelerating from a stop. The defect manifests in the following ways when pressing the accelerator: unresponsive or sluggish acceleration, jerking, shuddering, failure to shift, stalling and complete loss of power. Typically, the TCM defect manifests in two ways: shuddering/delayed brake release, which has happened over 20 times and loss of power/engine revving out of gear which has occured three times. …”
NHTSA complaint #11449635, filed 2022-01Related service bulletins
- 10174807Apr 17, 2020The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions:
- 10160098Apr 15, 2019This bulletin provides the procedure to write the Vehicle Identification Number (VIN) during the replacement of the Engine Control Module (ECM) or Powertrain Control Module…
Transmission and drivetrain: other model years
Other parts of the 2018 Hyundai Ioniq Hybrid
3 complaintsEngine
3 complaintsOther or unknown
3 complaintsVehicle speed control
2 complaintsAir bags
1 complaintsBrakes
1 complaintsSteering
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2018 Hyundai Ioniq Hybrid
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology