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SIB 34 02 20: Noticeable jerk when driving off in active cruise control (ACC) mode

Noticeable jerk when driving off in active cruise control (ACC) mode on BMW G20/G21/F30/F34 models (2019–2020); BMW released a software update.

BMW service bulletin · NHTSA ID 10175274 · Apr 2020 · also written SI B34 02 20, B340220

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.

NOTICEABLE JERK WHEN DRIVING OFF IN ACTIVE CRUISE CONTROL (ACC) MODE: A noticeable jerk can be felt at 2-3 mph when driving off in ACC mode. Software in the Dynamic Stability Control (DSC) unit.

NHTSA's summary of this communication (excerpt)

Official document on NHTSA (PDF) →

Details

Bulletin numberSIB 34 02 20
Also written: SI B34 02 20, B340220, 34 02 20, SIB-34-02-20, SI B340220
NHTSA ID10175274
Document IDs filedB340220
TypeService bulletin
Date
Models330i, M340i
Model years2019–2020
ChassisG20, G21, F30, F34
EnginesB46/B48, B58
Component (NHTSA)Electronic Stability Control › Automatic (Asc)

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.

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