BMW, Toyota Supra Transmission Control Units May Leak Oil
high How serious is it? About this label
A seized transmission can cause a sudden loss of drive power while driving, which increases the risk of a crash. The notice does not tell owners to stop driving.
Key facts
| NHTSA campaign number | 23V821000 |
|---|---|
| Reported to NHTSA | Dec 6, 2023 |
| Manufacturer | BMW of North America, LLC |
| Part affected | Power Train:automatic Transmission:control Module (tcm/pcm/tecm) |
| Vehicles covered | 5 model/year combinations, model years 2023 |
| Do-not-drive advisory | No |
| Park-outside advisory | No |
| Repair | Free at any franchised dealer |
What's wrong, in plain English
Some BMW X3, X4, X5, X6 and Toyota GR Supra vehicles have a transmission control unit with a cover that was not welded correctly. Because of this manufacturing issue, automatic transmission oil can leak into the control unit. If oil gets inside, it can cause the transmission gears to seize up, which suddenly takes away the vehicle's drive power.
What you should do
2. Contact BMW customer service at 1-800-525-7417 or your dealer to schedule an inspection.
3. Dealers will replace the transmission mechatronics module and fluid as necessary, free of charge.
Where do I find my VIN, and what do I tell the dealer?
Your VIN is the 17-character code on the lower left of the windshield, on your registration and usually on your insurance card. Enter it at nhtsa.gov/recalls to see whether this recall is still open on your car. When you call the dealer, say you have an open safety recall and give them NHTSA campaign number 23V821000. More in how recalls work.
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
The bigger picture
- BMW Power Train Recalls Involve Transmission and Motorcycle Drive Failures · all 13 BMW recalls in this area
- Toyota Power Train Recalls Cover Axles, Transmissions and Unwanted Movement · all 7 Toyota recalls in this area
Other BMW X5 recalls
- Jul 1, 2026BMW, Mini Integrated Brake System May Malfunctionhigh
- Sep 25, 2025BMW X5, X6, X7 Starter May Overheatcritical
- Oct 2, 2024BMW Brake System May Lose Power Assisthigh
- Sep 18, 2024BMW and MINI Brake System Weld May Failhigh
- Aug 13, 2024BMW X4, X5 Water Pump Connector May Shorthigh
- Aug 1, 2024BMW Starter Motor Overheating May Cause Engine Firecritical
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.