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Passenger car (BMW M5) - Repair
Official notice
19 Mar 2026
Last checked
27 Oct 2026
An official CAA Japan notice concerns Passenger car (BMW M5) - Repair. Defective bolts fastening the upper oil pan to the crankcase. ■ Defective parts, etc. Due to an improper manufacturing process, some bolts fastening the upper oil pan to the crankcase have not been tightened to the specified torque. Driving vibrations and other factors may therefore loosen these bolts, causing them to fall into the lower oil pan and damage the oil pump chain. This may result in insufficient oil supply to the engine, display of a Check Control message, accelerated wear of the connecting rod bearings and main bearings, and abnormal noise. Continued use in this condition may cause reduced compression associated with the connecting rods or abnormal crankshaft rotation, resulting in misfires. In the worst case, the engine may stop while driving. Published 2026-03-19.
What to do now
(Notification number) 外-4146
Recall number
外-4146
Official notice
2026-03-19
The hazard
The hazard
Defective bolts fastening the upper oil pan to the crankcase. ■ Defective parts, etc. Due to an improper manufacturing process, some bolts fastening the upper oil pan to the crankcase have not been tightened to the specified torque. Driving vibrations and other factors may therefore loosen these bolts, causing them to fall into the lower oil pan and damage the oil pump chain. This may result in insufficient oil supply to the engine, display of a Check Control message, accelerated wear of the connecting rod bearings and main bearings, and abnormal noise. Continued use in this condition may cause reduced compression associated with the connecting rods or abnormal crankshaft rotation, resulting in misfires. In the worst case, the engine may stop while driving.
How to check if you're affected
How to check if you're affected
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Product 1
Hazard
Where it was sold
Where it was sold
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Location 1
Affected area 1
Company & contacts
Company & contacts
Brand: BMW. Contact: ビー・エム・ダブリュー株式会社.
Source & status
Source & status
Recall details
Recall details
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Documents, notices & source
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