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SIB 28 01 24: Transmission corrosion
Transmission corrosion on B46/B48 engines (2024); BMW repairs affected cars free under a service campaign.
BMW service campaign · NHTSA ID 11006724 · Aug 2024 · also written SI B28 01 24, B280124
What it covers
A service campaign is a fix BMW performs free on affected cars. Ask a BMW center whether it is open on your VIN.
Micro-movements combined with frictional corrosion can increase wear on the longitudinal splinedconnection between the double clutch transmission (DCT) and the transfer box.
Details
| Bulletin number | SIB 28 01 24 Also written: SI B28 01 24, B280124, 28 01 24, SIB-28-01-24, SI B280124 |
|---|---|
| NHTSA ID | 11000502, 11005216, 11006724 (revisions) |
| Document IDs filed | B280124 |
| Type | Service campaign |
| Date | (first filed May 2024) |
| Models | X1 |
| Model years | 2024 |
| Chassis | U11 |
| Engines | B46/B48 |
| Component (NHTSA) | Power Train |
Model, year and engine coverage comes from NHTSA's records. Not every car in this range is affected; the official document lists the exact production dates and conditions.
More for these cars
Related bulletins
- SIB 28 02 24 Transmission corrosion Transmission corrosion on B46/B48 engines (2022–2024); BMW repairs affected cars free under a service campaign. Service campaign · Dec 2024
- SIB 18 01 25 Discolorization of exhaust system rear silencer Discolorization of exhaust system rear silencer on B46/B48 engines (2024–2025); BMW explains the cause and the approved repair. Service bulletin · May 2026
- SIB 28 01 25 Transmission warning message Transmission warning message on B46/B48 engines (2024–2026); BMW gives an inspection and repair procedure. Service bulletin · Jan 2026
- SIB 28 01 23 Transmission warning message Transmission warning message on B46/B48 engines (2022–2025); BMW gives an inspection and repair procedure. Service bulletin · Mar 2025
- SIB 06 31 25 Inspection and Return - Output Drive Repair Kit Inspection and Return - Output Drive Repair Kit on B46/B48 engines (2024); BMW gives an inspection and repair procedure. Other communication · May 2025
- SIB 61 03 23 Electrical system ticking noise Electrical system ticking noise on B46/B48 engines (2016–2023); BMW explains the cause and the approved repair. Service bulletin · Apr 2024
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Source: NHTSA Manufacturer Communications (public data). BimmerBench is not affiliated with BMW or NHTSA. The title and description above are our own plain-English summary; the full bulletin is BMW's document, linked above.