Service bulletin B120522
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 | 10241364 |
| Published by NHTSA | 2023-08-28 |
| Manufacturer's number | B120522 |
| Manufacturer's date | 2023-07-01 |
| NHTSA component | POWER TRAIN |
NHTSA's summary
BMW AG has issued a Delivery Stop (effective December 1, 2022) on certain Model Year 2023 BMW i4 andi7 vehicles that were produced between October 5, 2022 and November 10, 2022. A bearing in the front electric drive unit could fail due to a manufacturing defect, resulting in a noise while driving.
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
Transmission and driveline
| BMW I4 | 2023 |
|---|---|
| BMW I7 | 2023 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| B120523 | 2026-03-13. Service bulletin. The customer states there is a Drivetrain Malfunction message displayed in the instrument cluster. In addition, the following fault memory entries are saved in the CCU (Combined Charging Unit) 0317F2 - High-voltage system, insulation fault detected: when switch contactors are closed. 0317F1 - High-voltage system, insulation resistance below warning threshold: when switch contactors are closed. The fault memory entries (isolation faults) can occur both individually and in combination and must be traced back to the eDrive motor based on the ISTA test procedure. If ISTA test procedure lists possible cause of fault as; A metal chip is found behind the brush module (between the brush module and the end shield of the electrical machine). Repair required. Refer to service solution no. 20000794435083 in Aftersales Information Research (AIR). Follow information in the Procedure section below. |
|---|---|
| InVeh-InApp-Comm | 2026-02-25. Over-the-air update. A manufacturing defect in a bearing of the electronic drive unit could result in bearing damage. This is caused by an unusual acoustic signal in the area of the drive unit. The bearing could fail completely at a later stage, which will be displayed to you by means of a red Check Control message. In this case, the driver is asked to call BMW Roadside Assistance. |
| B121425 | 2025-11-25. Service campaign. RSU availability. BMW AG is conducting a Service Action on certain Model Year 2025 - 2026 BMW vehicles that were produced between March 17, 2021 – November 6, 2025. In certain driving situations there can be a loss of traction or wheel slip followed by a throttle or torque requirement that can potentially damage the axle shafts. Damage of the drive shaft can cause it to break. |
| B370124 | 2024-07-25. Service bulletin. While driving at low speeds (15-40 mph) on flat road surfaces, a knocking noise from the front axle may beheard during steering wheel movements. |
| B120523 | 2024-03-02. Service bulletin. The customer states there is a Drivetrain Malfunction message displayed in the instrument cluster. In addition, the following fault memory entries are saved in the CCU (Combined Charging Unit) 0317F2 - High-voltage system, insulation fault detected: when switch contactors are closed. 0317F1 - High-voltage system, insulation resistance below warning threshold: when switch contactors are closed. The fault memory entries (isolation faults) can occur both individually and in combination and must be traced back to the eDrive motor based on the ISTA test procedure. If ISTA test procedure lists possible cause of fault as; A metal chip is found behind the brush module (between the brush module and the end shield of the electrical machine). Repair required. Refer to service solution no. 20000794435083 in Aftersales Information Research (AIR). Follow information in the Procedure section below. |
| MCAS4023 | 2023-10-01. Service bulletin. BMW AG has requested the inspection of all dealer stock of the following part number(s) listed below to ensure the spacer is conformed to drawing. |
| B120523 | 2023-10-01. Service bulletin. The customer states there is a Drivetrain Malfunction message displayed in the instrument cluster. In addition, the following fault memory entries are saved in the CCU (Combined Charging Unit): 0317F2 - High-voltage system, insulation fault detected: when switch contactors are closed. 0317F1 - High-voltage system, insulation resistance below warning threshold: when switch contactors are closed. The fault memory entries (isolation faults) can occur both individually and in combination, and must be traced back to the eDrive motor based on the ISTA test procedure. If the ISTA test procedure lists the possible cause of fault as “a metal chip is found behind the brush module” (between the brush module and the end shield of the electrical machine), then a repair is required. Refer to service solution no. 20000794435083 in Aftersales Information Research (AIR). Follow information in the Procedure section below |
| B612023 | 2023-09-25. Service bulletin. ?The customer states there is a Drivetrain Malfunction message displayed in the instrument cluster, and in some cases the vehicle will not go into drive readiness. |
| SIB120522 | 2023-05-15. Service bulletin. BMW AG has issued a Delivery Stop (effective December 1, 2022) on certain Model Year 2023 BMW i4 and i7 vehicles that were produced between October 5, 2022 and November 10, 2022. A bearing in the front electric drive unit could fail due to a manufacturing defect, resulting in a noise while driving. |
| B120522 | 2023-03-20. Service bulletin. A bearing in the front electric drive unit could fail due to a manufacturing defect, resulting in a noise while driving. |