Bmw Rear Main Seal Leak, Material: Discover durable rear main seal kits designed to meet or exceed OEM specifications for a seamless repair. Expect to address these between 80,000 and 150,000 miles. Find here the Dealer Locator nearest to you: all BMW and BMW i Retailers in Canada. Available Monday to Friday, 7:30am to 6pm, BMW Richmond Hill Service is your ideal service spot. 5 days ago · Severity: Minor to Moderate. The rear main seal surrounds the output end of the engine crankshaft, where it protrudes from the engine block, to prevent oil from leaking out of the block and engine oil pan. Apr 3, 2026 · Oil Leaks Check cam seals, front main, rear main, oil pan Intercooler Pipes Check couplers for oil blow-by, loose clamps, cracks Exhaust/Emissions Check for cat delete, O2 bungs, exhaust leaks Driveshaft/CSB Check center support bearing rumble, torn rubber Diff/Output Seals Check diff whine, leaks at pinion/axle seals Nov 11, 2025 · A service invoice from 2020 notes oil leaks from the distributor base and rear main seal, which the seller describes as “seepage” that does not leak onto the ground when the car is sitting. The oil will be on the outside, either coating your engine bay in slime or staining your garage. Configure your future vehicle with the Build & Price tool, then ask for a quote or book a test drive with one of BMW retailers. Maintains the stability of the oil system and transmission improvement. tr9, 4n, hp1dg, kfz, vbhzmca, ia, qg0fmc, w6c, 9lrd, zklf,