# Service bulletin B120321

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.

- Type: Service bulletin
- NHTSA id: 10200230
- Published by NHTSA: 2021\-08\-09
- Manufacturer's number: B120321
- Manufacturer's date: 2021\-06\-01
- NHTSA component: EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY

## NHTSA's summary

Due to an software error, the adaptation values of the actuator contiguous wheel slip limitation \(ARB\) may be lost.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200230-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10200230-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Equipment and accessories, Software

## Vehicles listed

- 2021 BMW M3
- 2020 to 2021 BMW M4

## Other bulletins for the same vehicles and component

- [B611621](/bulletins/10205095.md), 2021-12-20, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. The "energy management" Check control message \(ID code 415\) is falsely displayed when entering the vehicle.
- [SIB 62 03 21](/bulletins/10202474.md), 2021-10-25, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. When the vehicle is operated in Sport Mode, the engine speed is no longer displayed in the BMW Head\-Up Display \(HUD\).
- [B840221](/bulletins/10200249.md), 2021-08-09, Service bulletin: EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; COMMUNICATION:MANUFACTURER TELEMATICS; ELECTRICAL SYSTEM:SOFTWARE. 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.
- [B651121](/bulletins/10200247.md), 2021-08-09, Service bulletin: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY. SiriusXM satellite radio is not working and does not display a channel list.
- [B610421](/bulletins/10200237.md), 2021-08-09, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE. The customer may complain of a check control message stating "Safe share detected" \(CCM\-ID 953\). Check control message can be verified by checking key reader information or performing the Check control message history service function.
- [B650709](/bulletins/10179009.md), 2020-08-31, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. NAVIGATION SYSTEM \- REPORTING MISSING OR INCORRECT ROADMAP DATA: Do not replace parts and do not program the vehicle. Roads can change by up to 15% every year. To ensure the best navigation experience, we do everything in our power to create the best maps. Your reports help us to detect changes in your area and keep future versions of our maps as accurate as possible. Therefore, a road map error or missing data must be reported directly to the map supplier.

JSON: [/v1/bulletins/10200230](/v1/bulletins/10200230)

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