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SIB 31 07 19: Axle corrosion
Axle corrosion on B46/B48/B58 engines (2019–2020); BMW explains the cause and the approved repair.
BMW service bulletin · NHTSA ID 10171487 · Jan 2020 · also written SI B31 07 19, B310719
What it covers
A service bulletin tells BMW technicians how to diagnose or fix a known issue. It is not a recall: a repair under a bulletin is normally paid by the owner unless the car is still under warranty or a warranty extension applies.
SERVICE ACTION: APPLY CAVITY WAX PROTECTION INSIDE THE FRONT AXLE SUPPORT: The corrosion protection applied to the inside of the front axle support during the manufacturing process may have minor coating defects.
Details
| Bulletin number | SIB 31 07 19 Also written: SI B31 07 19, B310719, 31 07 19, SIB-31-07-19, SI B310719 |
|---|---|
| NHTSA ID | 10169458, 10171487 (revisions) |
| Document IDs filed | B310719 |
| Type | Service bulletin |
| Date | (first filed Nov 2019) |
| Models | 330i, M340i |
| Model years | 2019–2020 |
| Chassis | G20, G21, F30, F34 |
| Engines | B46/B48, B58 |
| Component (NHTSA) | Equipment Power Train › Axle Assembly Steering |
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
F30 repair costs G20 repair costs All B46/B48 bulletins All B58 bulletins
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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.