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SIB 66 07 20: Electrical system warning message

Electrical system warning message on BMW G14/G15/G16/G20 and other models (2017–2021); BMW gives an inspection and repair procedure.

BMW service bulletin · NHTSA ID 10250601 · Feb 2024 · also written SI B66 07 20, B660720

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 functionality of the left rear SRR sensor could be reduced which would display the Driving Assistance Check Control Message.

NHTSA's summary of this communication (excerpt)

Official document on NHTSA (PDF) →

Details

Bulletin numberSIB 66 07 20
Also written: SI B66 07 20, B660720, 66 07 20, SIB-66-07-20, SI B660720
NHTSA ID10175288, 10182624, 10182923, 10250601 (revisions)
Document IDs filedB660720
TypeService bulletin
Date (first filed Apr 2020)
Models330e, 330i, 530e, 530i, 540d, 540i, 840i, M340i, M550i, M8, M8 GRAN, M850i
Model years2017–2021
ChassisG14, G15, G16, G20, G30, G21, G31, F30, F34, F91, F92, F93
EnginesB46/B48, B57, B58, N63, S63
Component (NHTSA)Electrical System
Equipment
Equipment Adaptive/Mobility

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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  • SIB 12 05 25 Electrical system corrosion Electrical system corrosion on BMW G05/G07/G20 models (2024); BMW repairs affected cars free under a service campaign. Service campaign · May 2025
  • NHTSA 10216792 Tec25 Wishbone Return Tec25 Wishbone Return on BMW G11/G12/E60/E89 and other models (2016); BMW explains the cause and the approved repair. Service bulletin · Mar 2016

Before you pay, check the VIN for recalls. Some failures are covered by a safety recall or a BMW warranty extension.

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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