# Service bulletin B840420

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: 10179013
- Published by NHTSA: 2020\-08\-31
- Manufacturer's number: B840420
- Manufacturer's date: 2020\-07\-01
- NHTSA component: ELECTRICAL SYSTEM:SOFTWARE

## NHTSA's summary

SERVICE ACTION \- PROGRAM TELEMATICS MODULE: A software error in the telematics control unit can result in an interruption in communication between the vehicle and the back end \(BMW server\). Software error in the Advanced Telematics Module \(ATM\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179013-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179013-9999.pdf)

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

## Components

Electrical system, Software

## Vehicles listed

- 2021 BMW 330E
- 2019 to 2020 BMW 330I
- 2018 to 2020 BMW 530E
- 2017 to 2020 BMW 530I
- 2018 to 2019 BMW 540D
- 2020 BMW 540D
- 2017 to 2020 BMW 540I
- 2018 BMW C 400 X
- 2017 BMW F800 R
- 2020 BMW M340I
- 2017 BMW M550I
- 2018 to 2020 BMW M550I

## Recalls for the same vehicles and component

- [23V584000](/recalls/nhtsa/23V584000.md), 2023-08-16: ELECTRICAL SYSTEM:SOFTWARE; SEAT BELTS

## Other bulletins for the same vehicles and component

- [B610321](/bulletins/10250893.md), 2024-03-02, Service bulletin: ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE:STORAGE:EVAPORATIVE EMISSIONS:CANISTER; ELECTRICAL SYSTEM:SOFTWARE. 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.
- [B240223](/bulletins/10239603.md), 2023-07-24, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. BMW AG has issued an Emissions Recall \(effective March 17, 2023\) on a certain Model Year 2021 \- 2023 BMW vehicles that were produced between June 16, 2020, and December 13, 2022. Due to a software failure, there is the possibility that the transmission does not go into "sleep mode" if the car is turned off.
- [B090221](/bulletins/10239599.md), 2023-07-24, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. 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.
- [B620322](/bulletins/10227566.md), 2022-12-12, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM:SOFTWARE. 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 \(like ECO PRO mode\).
- [SIB090121](/bulletins/10215750.md), 2022-07-18, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ELECTRICAL SYSTEM:SOFTWARE. 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.
- [B620222](/bulletins/10212797.md), 2022-05-31, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. 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 \(Kombi\).
- [B840222](/bulletins/10211810.md), 2022-05-16, Service bulletin: EQUIPMENT; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS; ELECTRICAL SYSTEM:SOFTWARE. The customer finds an indication in the â??myBMWâ? app that the tires need service due to wear. Even after replacing the tires, the tire service indicator is still present in the myBMW app.
- [B652021](/bulletins/10206687.md), 2022-01-24, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:SOFTWARE. BMW AG has issued a Delivery Stop \(effective October 25, 2021\) on certain Model Year 2022 BMW vehicles that were produced after October 25, 2021. Due to supply chain limitations, certain vehicles were produced without a CID with touch function and without Reversing Assistant.
- [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.
- [SIB120421](/bulletins/10204620.md), 2021-12-13, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. A software optimization affecting vehicle performance has been made available.

JSON: [/v1/bulletins/10179013](/v1/bulletins/10179013)

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