Hyundai Kona 2018–2022 — technical service bulletin
Bulletin 23-01-007H · NHTSA communication 10230907 · issued Jan 26, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2022
model years
5
vehicle entries
Official summary
Certain 2018-2022MY Kona (OS) vehicles equipped with 2.0L engines and 4WD may exhibit transfer case oil leaks and/or an oil smell caused by the transfer case pinion oil seal overheating. This bulletin describes the procedure to update the 4WD electronic control module (ECU) and to inspect the transfer pinion area for leakage. If a leak is detected, the transfer case pinion oil seal will need to be replaced.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.