WOODCLIFF LAKE, N.J./PLANO, Texas – BMW of North America, Inc., will recall more than 50,000 sedans, sport-utility vehicles and sports cars, as well as the Toyota Supra (which is functionally similar to the BMW Z4 sports car) due to a software issue which might affect brake boost capability.

Built between Feb 2019 and June 2021, the vehicles affected by the recall are: approximately 10,877 2020 BMW M340i, M340i xDrive coupes; approximately 4,130 2020-2021 BMW X4 M40i SUVs; approximately 5,375 2020 BMW 540i, 540i xDrive sedans; approximately 470 2020-2021 BMW 745Le xDrive hybrid-electric sedans; approximately 14,006 2020 BMW X3 M40i SUVs; 2,151 : 2019-2021 BMW Z4 M40i sports, cars and approximately 13,014 2020-2021 Toyota Supra sports cars.

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According to the National Highway Traffic Safety Administration Part 573 Safety Recall Report 21V-598 the issue involves engine-management software which, under certain conditions, could cause a malfunction of the vacuum pump for brake assistance.

The report detailed, “The specific engine start conditions consist of either 1) pressing the engine start/stop button two times in rapid succession, or 2) depressing the brake pedal very briefly while pressing the engine start/stop button. This could result in a loss of brake assist. However, prior to a loss of brake assist, the full brake assist function is available for approximately two or three full brake applications, or approximately six partial brake applications. Fully mechanical braking (without assist) is not affected, and remains available.”

The result of reduced brake assist can be longer stopping distances, which according to NHTSA, could lead to a crash.

The remedy is updating the engine-management software at an authorized BMW and Toyota service facility.

Dealers were scheduled to begin receiving notification Aug. 2nd; customers Oct. 1st.