The defect
BMW of North America, LLC (BMW) is recalling certain 2020 M340i, M340i xDrive, 540i, 540i xDrive, X3 M40i, 2020-2021 X4 M40i, 745Le xDrive, 2019-2021 Z4 M40i, and 2020-2021 Toyota Supra vehicles. During engine start, the engine management software may cause loss of braking assist. Full mechanical braking (without assist) remains available.
The risk
Loss of braking assist can increase the risk of a crash.
The remedy
Dealers will update the engine management software, free of charge. Owner notification letters were mailed on September 17, 2021. Owners may contact BMW customer service at 1-800-525-7417.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| BMW 540i | 2020 |
| BMW 745Le | 2020, 2021 |
| BMW M340I | 2020 |
| BMW X3 | 2020 |
| BMW X4 | 2020, 2021 |
| BMW Z4 | 2019, 2020, 2021 |
| Toyota Supra | 2020, 2021 |
Components: ENGINE
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| BMW 540i | 2020 | 3 | 5 |
| BMW 745Le | 2020 | 0 | 3 |
| BMW 745Le | 2021 | 0 | 4 |
| BMW M340I | 2020 | 53 | 10 |
| BMW X3 | 2020 | 110 | 16 |
| BMW X4 | 2020 | 15 | 10 |
| BMW X4 | 2021 | 6 | 7 |
| BMW Z4 | 2019 | 5 | 6 |
| BMW Z4 | 2020 | 5 | 6 |
| BMW Z4 | 2021 | 1 | 5 |
| Toyota Supra | 2020 | 16 | 8 |
| Toyota Supra | 2021 | 20 | 5 |
Other engine recalls in 2021
20 of the 988 recall campaigns reported to NHTSA in 2021 concerned the engine; BMW of North America, LLC filed 347 campaigns in all.
| 21V844000 29 Oct 2021 | Kia Motors America |
| 21V806000 15 Oct 2021 | Yamaha Motor Corporation, USA |
| 21V727000 17 Sept 2021 | Hyundai Motor America |
| 21V609000 4 Aug 2021 | PACCAR Incorporated |
| 21V502000 1 Jul 2021 | Aprilia USA, Inc. |
| 21V341000 12 May 2021 | Porsche Cars North America, Inc. |
| 21V336000 12 May 2021 | Lamborghini (Automobili Lamborghini) |
| 21V339000 12 May 2021 | Volkswagen Group of America, Inc. |
NHTSA recalls (public domain) · all recalls of 2021