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SIB 33 01 19: Differential humming noise
Differential humming noise on N55/S55 engines (2015–2018); BMW explains the cause and the approved repair.
BMW service bulletin · NHTSA ID 10153752 · Jan 2019 · also written SI B33 01 19, B330119
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.
DRONING NOISE FROM THE REAR AXLE. A humming/droning noise is heard with vibration during partial to full engine load in higher gears. The tuning of the rear suspension mount for the differential.
Details
| Bulletin number | SIB 33 01 19 Also written: SI B33 01 19, B330119, 33 01 19, SIB-33-01-19, SI B330119 |
|---|---|
| NHTSA ID | 10153752 |
| Document IDs filed | B330119 |
| Type | Service bulletin |
| Date | |
| Models | M2, M3, M4 |
| Model years | 2015–2018 |
| Chassis | F80, F82, F83, F87 |
| Engines | N55, S55 |
| Component (NHTSA) | Engine Suspension › Multiple Axle |
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.
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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.