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Service bulletin B121818

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10171484
Published by NHTSA2020-02-18
Manufacturer's numberB121818
Manufacturer's date2020-01-01
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING

NHTSA's summary

DME FC 20E120 IS STORED AND THE MIL IS ILLUMINATED: This Service Information Bulletin (Revision 2) replaces SI B12 18 18 dated July 2018. The Malfunction Indicator Lamp (MIL) is illuminated and the following fault code is stored in the Digital Motor Electronics (DME). 20E120 - Crankcase ventilation ventilation hose: not connected/defect A software error in the Digital Motor Electronics (DME).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Software

Vehicles listed
BMW 740E2017, 2018, 2019
BMW 740I2017, 2018, 2019, 2020
BMW 740LI2016 to 2017
BMW 745E2020
BMW 750I2018, 2019
BMW 750LI2016 to 2019
BMW B7 ALPINA2018 to 2020
BMW M760I2017, 2018, 2019, 2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
19V5890002019-08-12. ELECTRICAL SYSTEM:SOFTWARE; SEAT BELTS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
B6103212024-03-02. Service bulletin. SITUATION BMW AG is conducting a Voluntary Emissions Recall (effective April 23, 2021) on a certain Model Year 2020 - 2021 BMW vehicles that were produced between August 13, 2019 and December 11, 2020. Do not deliver to a customer, a New, Certified Pre-Owned or Used vehicle subject to an emissions recall, until the vehicle is repaired. Do not use or sell replacement equipment/parts subject to an emissions recall. The 12 V battery’s dual storage system (DSS) may contain a software error which intermittently causes a continuous resetting of the microcontroller and communication failure. The error is displayed by a red Check Control message.
B0902212023-07-24. Service bulletin. With the introduction of the BMW Remote Software Upgrade, all Service Pack 18 vehicles and partial Service Pack 15 vehicles may receive new functionality or modifications in their features.
B6203222022-12-12. Service bulletin. After programming, the customer may complain that the Sport Mode display is not fully displayed in the instrument cluster. Instead of a red background in sport mode, the background is displayed in blue (like ECO PRO mode).
SIB0901212022-07-18. Service bulletin. BMW offers a new special ISTA Installation made available for Roadside Assistance / Mobile Service technicians. The new ISTA Version is also able to be used in case of a Remote Software Upgrade (RSU) programming failure to get the customer car reprogrammed on site. In case of a Remote Software Upgrade failure, the engine start is prevented for safety reasons until the vehicle is programmed correctly. Most of the errors occur when only one control unit fails to program correctly.
B6202222022-05-31. Service bulletin. Sport mode is not displayed correctly in the instrument cluster. Instead of a red background in sport mode, the background is displayed in blue (like in Eco Pro mode). Software in the instrument cluster (Kombi).
B6116212021-12-20. Service bulletin. The "energy management" Check control message (ID code 415) is falsely displayed when entering the vehicle.
SIB 62 03 212021-10-25. Service bulletin. When the vehicle is operated in Sport Mode, the engine speed is no longer displayed in the BMW Head-Up Display (HUD).
B8402212021-08-09. Service bulletin. The discontinuation of 3G cellular communication for Combox, TCB 3G and ATM 3G (Telematics ControlModule) can no longer be supported by the cellular network provider starting February 2022. The decision to phase out 3G network technology was made at the discretion of the respective cellular carriers and lies beyond the control of BMW. Due to the phase-out, BMW Assist and ConnectedDrive services will no longer be supported after this date.
B6511212021-08-09. Service bulletin. SiriusXM satellite radio is not working and does not display a channel list.
B6202212021-08-09. Service bulletin. The total electrically driven miles are lost/reset after the vehicle is programmed. This does not affect the total vehicle odometer reading.