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SIB 34 08 21: Brakes inspection
Brakes inspection on BMW G20/G21/G22/G23 and other models (2019–2021); BMW gives an inspection and repair procedure.
BMW service bulletin · NHTSA ID 10204626 · Jul 2021 · also written SI B34 08 21, B340821
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.
The yellow CCM, ID code 42, lights up when starting the vehicle. ID code 00042: Brake system. It is possible to continue driving. Additional notes: Avoid abrupt braking as far as possible. Drive at a moderate speed. Have it checked by your nearest Service Center.
Details
| Bulletin number | SIB 34 08 21 Also written: SI B34 08 21, B340821, 34 08 21, SIB-34-08-21, SI B340821 |
|---|---|
| NHTSA ID | 10204626 |
| Document IDs filed | SIB340821 |
| Type | Service bulletin |
| Date | |
| Models | 330e, 330i, 430i, M340i, M440i, Z4 |
| Model years | 2019–2021 |
| Chassis | G20, G21, G22, G23, G26, G29, F30, F34 |
| Engines | B46/B48, B58 |
| Component (NHTSA) | Hydraulic Service Brakes |
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
Related bulletins
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Before you pay: check your VIN for recalls
Some failures are covered by a safety recall or a warranty extension. Our free recall check lists NHTSA recalls for your car's model and year.
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.