MAHLE Original Buick Century 89-86 Rear Main Seal Set

The nitrile rubber lip on this rear main seal is designed to hold up to engine oil and heat. It's a crucial part for keeping your engine running smoothly by preventing oil from leaking out around the crankshaft where it exits the engine block. When this seal starts to go, you'll often notice oil spots under your vehicle after it's been parked.

This seal fits a wide range of vehicles, including many Buick, Chevrolet, and GMC models from the 1980s through the early 2000s. It's a well-built replacement part that helps ensure your engine oil stays where it belongs. Replacing a rear main seal can be a involved job, often requiring the transmission to be removed, so it's best tackled when you're already doing other transmission or clutch work.