# Service bulletin B640426

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: 11034465
- Published by NHTSA: 2026\-07\-03
- Manufacturer's number: B640426
- Manufacturer's date: 2026\-06\-27
- NHTSA component: ENGINE

## NHTSA's summary

Customer may feel something transmitted via the steering column while turning the steering wheel. There may also be coolant lost accompanied by a check control message: ‘Top up coolant’.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034465-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11034465-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2023 BMW 530I

## 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.
- [B010324](/bulletins/11032731.md), 2026-05-18, Warranty extension: ENGINE. The EVAP systems purge \(vent\) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in\-service date.
- [B170224](/bulletins/10252134.md), 2024-04-01, Service bulletin: ENGINE AND ENGINE COOLING. The following fault is stored in the DME during the pre\-delivery inspection \(PDI, aka Quality Certification 1,QC1\): 224123 – Coolant pump for low\-temperature cooling circuit, internal test: Blockage detected
- [B120721](/bulletins/10252038.md), 2024-04-01, Service bulletin: ENGINE AND ENGINE COOLING. Check Control message \(CCM\) indicates: \(ID 213\): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 \- Starter alternator / belt for 48V system \(OSA\_RIEMEN\_RISS\): Belt betweenCombustion engine and starter generator torn And/or one or more of the following other issues are also occurring: Noise in the area of the belt drive. Odor from the engine compartment. Smoke formation in the area of the belt drive. Drive belt damaged or prematurely worn. Torn drive belt.
- [B160623](/bulletins/10247567.md), 2024-01-03, Service bulletin: FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. Engine will crank but not start. There is no communication with the integrated fuel module \(TFE\) whendiagnosing with ISTA. The following two fault codes will be stored in the DME: 032B43 \- Low fuel pressure system, electric fuel pump: pressure value too low CDA594 \- Message \(\- 0x33E\) missing, receiver DME, transmitter TFE
- [B120721](/bulletins/10245367.md), 2023-12-06, Service bulletin: ENGINE AND ENGINE COOLING. Check Control message \(CCM\) indicates: \(ID 213\): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 \- Starter alternator / belt for 48V system \(OSA\_RIEMEN\_RISS\): Belt betweenCombustion engine and starter generator torn And/or one or more of the following other issues are also occurring: Noise in the area of the belt drive. Odor from the engine compartment. Smoke formation in the area of the belt drive. Drive belt damaged or prematurely worn. Torn drive belt.
- [SIB260422](/bulletins/10236387.md), 2023-05-22, Service bulletin: ENGINE. Engine Variants Updated.
- [B260422](/bulletins/10235179.md), 2023-05-01, Service bulletin: ENGINE AND ENGINE COOLING. There is a howling or whistling noise from under the vehicle at 30 \-37 mph \(50 \-60 km/h\) when driving after a cold start, when the outside temperature is 32 F \(0 C\) or lower.

JSON: [/v1/bulletins/11034465](/v1/bulletins/11034465)

[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%20B640426&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11034465&vehicle=Service%20bulletin%20B640426)