WOODCLIFF LAKE, N.J. – BMW of North America, LLC is recalling certain 2019-2021 vehicles due to a potential defective brake-boost and anti-lock braking system (ABS).
According to the National Highway Transportation Safety Administration (NHTSA) Part 573 Safety Recall Report 21V-062, “During supplier production, a component (rotor and shaft) within the system may not have been welded to specifications. During a hard (emergency) braking maneuver, the rotor and shaft could separate, which could lead to a reduction in braking assistance (brake boost), and the Antilock Brake System (ABS) function would no longer be available.”
BMW M3 and M4 Brakes Detailed
Mechanical braking, without assist, is not affected by the defect. The emergency function of brake force distribution is also maintained to help control vehicle stability.
During a hard (emergency) braking maneuver, a reduction in braking assistance (brake boost) could lead to an extended stopping distance. In combination with a loss of ABS function, this could increase the risk of a crash.
The recall covers 901 vehicles with the potential defective brake system divided amongst the 2020-21 740LI; 2021 745LE; 2020-21 750LI; 2020-21 840I; 2021M3; 2021 M4; 2020-21 M760LI; 2020-21 M8; 2020-21 M850I; 2019-21 X5; 2020-21 X6, and 2019-21 X7.
According to the NHTSA report, BMW is not aware of any accidents or injuries due to this condition.
BMW scheduled dealer notification for the second week of February and will begin notifying customers April 5th. Customers will be instructed to bring their recalled vehicles to an authorized BMW dealer which will replace the integrated brake system (the hydraulic unit/master cylinder).
Any and all repairs related to this recall will be covered by the BMW warranty.