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BMW SUVs and Toyota Supra can lose power suddenly

NHTSA campaign 23V821000 · Reported 2023-12-06 · BMW of North America, LLC

high How serious is it? About this label

This is serious because you can lose power without warning while driving, so get it checked promptly and stop driving if the vehicle jerks, hesitates, or a transmission warning appears.

What's wrong, in plain English

The cover on the transmission's control unit may not have been welded properly, which can let transmission oil leak into the electronics inside. If that happens, the gears in the transmission can seize up and the vehicle can suddenly lose drive power while you are moving — including at highway speed with traffic behind you. A dealer will replace the transmission control module and change the transmission fluid if needed, at no cost.

What you should do

1. Look up your VIN at nhtsa.gov/recalls to see if your vehicle is included. 2. Call BMW customer service at 1-800-525-7417 or your BMW or Toyota dealer for an appointment. 3. Have the module replaced — the repair is free.

Affected vehicles (5)

Who to contact

BMW — official BMW recall lookup

Customer service: 1-800-525-7417

Toyota — official Toyota recall lookup

Customer service: 1-800-331-4331

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

The bigger picture

Official notice

Component
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
Summary
BMW of North America, LLC (BMW) is recalling certain 2023 Toyota GR Supra, 3 Series Sedan (330i xDrive, M340i xDrive, M3), 5 Series Sedan (530i, 530i xDrive, M5), 4 Series Gran Coupe (430i, 430i xDrive), 4 Series Coupe (430i, 430i xDrive, M440i xDrive), 4 Series Convertible (430i, 430i xDrive, M440i xDrive), 8 Series Coupe (840i, M850i xDrive, M8), 8 Series Convertible (840i, M850i xDrive, M8), 8 Series Gran Coupe (850i xDrive, M8), X3 SAV (X3 xDrive30i, X3M), X4 SAV (X4 xDrive30i), X5 SAV (X5 xDrive40i, X5 M50i, X5M), X6 SAV (X6 xDrive40i, X6 M50i, X6M), and Z4 sDrive30i, Z4 M40i vehicles. The weld seam of the integrated transmission control unit's cover may not have been manufactured properly, which could allow automatic transmission oil to leak into the transmission control unit.
Safety risk
Transmission oil that leaks into the control unit can lead to a seizure of the transmission gears, causing a sudden loss of drive power and increasing the risk of a crash.
Remedy
Dealers will replace the transmission mechatronics module and the automatic transmission fluid, as necessary, free of charge. Owner notification letters were mailed January 26, 2024. Owners may contact BMW customer service at 1-800-525-7417.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.