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SIB 66 15 20: Active cruise control - unexpected deceleration

Active cruise control - unexpected deceleration on BMW G05/G06/G07/G11 and other models (2016–2021); BMW explains the cause and the approved repair.

BMW service bulletin · NHTSA ID 10184592 · Nov 2020 · also written SI B66 15 20, B661520

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.

ACTIVE CRUISE CONTROL - UNEXPECTED DECELERATION: Vehicle slows down (decelerates) unexpectedly while Active Cruise Control with Stop & Go (ACC) function is activated.

NHTSA's summary of this communication (excerpt)

Official document on NHTSA (PDF) →

Details

Bulletin numberSIB 66 15 20
Also written: SI B66 15 20, B661520, 66 15 20, SIB-66-15-20, SI B661520
NHTSA ID10184592
Document IDs filedB661520
TypeService bulletin
Date
Models330e, 330i, 530e, 530i, 540d, 540i, 640i, 740e, 740i, 740LI, 745e, 750i, 750LI, 840i, B7 ALPINA, M340i, M5, M550i, M760i, M8, M8 GRAN, M850i, X5, X6, X6 M, X7
Model years2016–2021
ChassisG05, G06, G07, G11, G12, G14, G15, G16, G20, G21, G30, G31, G32, F06, F12, F13, F30, F34, F90, F91, F92, F93, F96
EnginesB46/B48, B57, B58, N55, N63, N74, S63
Component (NHTSA)Vehicle Speed Control › Cruise Control

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.

Related bulletins

  • SIB 66 11 17 Battery fault codes Battery fault codes on BMW G11/G12/G30/G31 and other models (2016–2018); BMW released a software update. Service bulletin · Sep 2017
  • SIB 66 25 16 Cruise control fault codes Cruise control fault codes on BMW G11/G12 models (2016–2017); the fix is replacing the affected part. Service bulletin · Nov 2016
  • SIB 66 09 16 Camera fault codes Camera fault codes on BMW E60/E90/E92/E93 and other models (2010–2018); BMW gives an inspection and repair procedure. Service bulletin · May 2016
  • SIB 66 02 15 Steering no-start Steering no-start on BMW E90/E92/E93/F22 and other models (2012–2016); BMW gives an inspection and repair procedure. Service bulletin · Mar 2015

Before you pay: check your VIN for recalls

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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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