07:49 19-02-2026

BMW faces class-action lawsuit over defective oil filter housings

BMW faces a class-action lawsuit in New Jersey over defective oil filter housings in B46, B48, and B58 engines, leading to coolant leaks and expensive out-of-warranty repairs for owners.

BMW is facing a class-action lawsuit in New Jersey over defective oil filter housings. The claim alleges that these components fail prematurely, causing coolant leaks. As a result, owners are forced to cover costly repairs out of warranty.

The lawsuit involves B46, B48, and six-cylinder B58 engines found in BMW 1-5 Series and X1-X4 models from 2014-2021, as well as Mini Cooper, Clubman, and Countryman vehicles. According to the plaintiffs, the housing should last at least 150,000 miles (241,000 km), but in some cases, replacement was needed after just 60,000 miles (96,500 km). Repair costs can reach $4,000.

The filing states that internal partitions in the housing can crack or warp, while gaskets lose their seal. This allows antifreeze to mix with the oil or leak externally, potentially leading to engine overheating and failure. It's also noted that BMW switched from aluminum to polycarbonate housings around 2011.

A separate owner has started a petition demanding a vehicle recall, which has gathered about 600 signatures. For buyers considering used cars with these engines, experts advise factoring in potential risks and checking repair histories.