Genuine BMW Rear Main Seal, BMW B48 1303410 - Location: The front main

- Location: The front main seal is typically located at the front of the engine

consistently outperforming competitors on both the track and the street

more aggressive cam profiles unlock faster throttle response and extend the engine’s power band

this clear hose should be inspected occasionally and replaced if needed

Photos for reference only - B48 cylinder head pictured

Genuine BMW Rear Main Seal, BMW B48 1303410 - Location: The front mainThe rear main seal, also known as the rear crankshaft seal, is a crucial component in an engine. Genuine BMW Part Number: 11148664904 Purpose 1. Prevents Oil Leaks: The primary function of the rear main seal is to prevent engine oil from leaking out of the rear end of the crankshaft. It seals the gap between the crankshaft and the engine block or the transmission housing, ensuring that the oil remains within the engine. 2. Maintains Oil Pressure: By