# Service bulletin B120324

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: 11026948
- Published by NHTSA: 2026\-01\-05
- Manufacturer's number: B120324
- Manufacturer's date: 2025\-12\-17
- NHTSA component: ELECTRICAL SYSTEM; ENGINE

## NHTSA's summary

The Engine Malfunction Warning is illuminated, and the following fault code is stored in the DME\- FC 034AEF Exhaust Cold Start, Not Controllable

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026948-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11026948-9999.pdf)

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

## Components

Electrical system, Engine

## Vehicles listed

- 2025 BMW X1
- 2025 BMW X2

## Other bulletins for the same vehicles and component

- [B120326](/bulletins/11035396.md), 2026-07-31, Emissions: ENGINE. Due to an implementation error in various OBD diagnostics in the vehicle's control units, in very rare cases itmay happen that stored fault memory codes \(DTCs\) and the MIL \(warning light\) are not automaticallydeleted even though the underlying malfunction has already been rectified. This does not comply with the statutory OBD specifications.
- [B651826](/bulletins/11034469.md), 2026-07-03, Service bulletin: ELECTRICAL SYSTEM. If BMW Intelligent Personal Assistant is active in the vehicle, once the customer exits the vehicle and a newkey cycle starts, the Intelligent Personal Assistant is deactivated and no longer available.
- [B651726](/bulletins/11034468.md), 2026-07-03, Service bulletin: ELECTRICAL SYSTEM. After a factory reset of the head unit, the navigation voice input cannot be activated or deactivated.
- [B651426](/bulletins/11034467.md), 2026-07-03, Service bulletin: ELECTRICAL SYSTEM. The vehicle may experience various operational issues with Apple CarPlay Projected Modes such as: Dropped connections No automatic reconnection Display errors
- [B651226](/bulletins/11034466.md), 2026-07-03, Service bulletin: ELECTRICAL SYSTEM. The voice command to deactivate Automatic Engine Start/Stop function can also trigger the activation ofIconic Sounds.
- [B610126](/bulletins/11034462.md), 2026-07-03, Service bulletin: ELECTRICAL SYSTEM. During vehicle start\-up the Secure Element \(SE\) of the BCP may fail causing communication errors. TheCheck Control message “Drive carefully. Driving stabilisation.” will appear. In addition, the fault memoryentries below will be stored within 40 seconds of each other. ACSM: 02010A \- Coding: Coding data not qualified VIP: 02390A \- VIP control unit: Coding data not released, signature IB: 02290A \- DSC control unit: Coding data not released, signature HKFM: 020D0A \- HKFM: Coding data are not qualified
- [B120326](/bulletins/11034449.md), 2026-07-03, Warranty extension: ELECTRICAL SYSTEM. Due to an implementation error in various OBD diagnostics in the vehicle's control units, in very rare cases itmay happen that stored fault memory codes \(DTCs\) and the MIL \(warning light\) are not automaticallydeleted even though the underlying malfunction has already been rectified. This does not comply with the statutory OBD specifications.
- [B651226](/bulletins/11031578.md), 2026-04-27, Service bulletin: ELECTRICAL SYSTEM. After updating the vehicle to I\-level …25\-07\-5XX, the spoken language of the navigation instructions changes from the set language for the voice assistant without the customer initiating the change.
- [B650926](/bulletins/11031577.md), 2026-04-27, Service bulletin: ELECTRICAL SYSTEM. The customer reports that the Intelligent Personal Assistant \(IPA\) does not respond to the "Hey BMW" wakeup word, or to the push\-to\-talk \(aka voice activation\) button on the steering wheel. Also, various voice commands are possibly not correctly executed.
- [InVeh\-InApp\-Comm](/bulletins/11030318.md), 2026-03-30, Over\-the\-air update: ENGINE. It was determined that the oil return line for the turbo charger was installed with a bolt of the wrong size. The bolt for the oil return line needs to be replaced.

JSON: [/v1/bulletins/11026948](/v1/bulletins/11026948)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20B120324&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11026948&vehicle=Service%20bulletin%20B120324)