NHTSA Complaint #11682147 — 2016 BMW 528I

Multiple critical BMW engine components are manufactured from plastic, including the oil pan, coolant expansion tank, valve cover, and turbo inlet pipe. These parts are prone to premature failure from normal heat & stress, as confirmed by independent mechanics. Failures can cause sudden loss of oil or coolant, persistent oil leaks, overheating, loss of power, and roadside breakdowns. The use of plastic for an oil pan is concerning. Plastic cannot withstand impacts with common road hazards such as tire fragments, etc. Striking a retread at highway speed could easily crack the pan, dump all engine oil, and lead to catastrophic engine seizure, endangering people. In my case (2016 BMW 528i), several plastic components have already failed, including the oil pan, turbo inlet pipe, coolant expansion tank, valve cover, and multiple coil packs. While BMW considers coil pack replacement a normal maintenance item, there are widespread complaints of premature failures. Most of the heat-related plastic failures occur above 70,000 miles. Despite several related breakdowns, the previous owner and I avoided dangerous situations. These failures are widely documented by other owners online and by independent mechanics, who often recommend aftermarket aluminum replacements for improved safety and reliability. BMW is aware of these issues but continues to use plastic for critical components--they recently lost a class-action lawsuit related to internal plastic engine parts that caused catastrophic engine damage, showing prior knowledge of the risks. These failures also create environmental hazards, as leaking plastic oil pans & valve covers contaminate roads and driveways. Because repairs are $$$, many consumers delay fixing the problems, increasing both safety and environmental risks. This design prioritizes cost savings over durability and safety. These parts should be made of metal to withstand normal use and protect drivers, passengers, and the public from unnecessary hazards.