BMW of North America is recalling 50,024 model year 2020 M340i, M340i xDrive, 540i, 540i xDrive, X3 M40i, model year 2020-2021 X4 M40i, 745Le xDrive, model year 2019-2021 Z4 M40i, and model year 2020-2021 Toyota Supra vehicles.
During engine start, the engine management software may cause a loss of braking assist. Full mechanical braking (without assist) remains available.
Loss of braking assist can increase the risk of a crash.
What to do
Dealers will update the engine management software free of charge. Owner notification letters are expected to be mailed on October 1, 2021.
Owners may contact BMW customer service at (800) 525-7417.