Subsequent repair action: front motor reduction gear assembly replacement (SC345Z)
Kia technical service bulletin SC345Z_TSB for 2023-2024 Kia EV6 and 2023-2024 Kia Niro EV.
- Bulletin number
- SC345Z_TSB (SC345Z)
- Component
- Power train
- Summary
- TECHNICAL SERVICE BULLETIN: SUBSEQUENT REPAIR ACTION: FRONT MOTOR REDUCTION GEAR ASSEMBLY REPLACEMENT (SC345Z) - This bulletin provides information regarding grinding or whining noise coming from the front motor reduction gear assembly after replacing the oil under SC345 (published in August 2025) on certain 2023-2024MY Niro EV (SG2 EV) vehicles produced from December 12, 2022 through February 7, 2024 and EV6 (CV) vehicles produced from December 14, 2022 through February 22, 2024. In rare cases, the front motor reduction gear assembly may exhibit noise after having the oil replaced.
Owners of these vehicles have filed 45 complaints in the transmission category.
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