Featuring the patented

leading to leaks and improper lubrication of your mighty S55

Fuel injectors and port injection kit are not included

Step 1: Tighten Studs 1 through 12 to 25 ft-lbs

Genuine BMW Front Main Seal, BMW B48 5143 Featuring the patentedThe front main seal, also known as the front crankshaft seal, plays a critical role in the proper functioning of an engine. BMW Part Number: 11118664905 Purpose 1. Prevents Oil Leaks: The primary function of the front main seal is to prevent engine oil from leaking out of the front end of the crankshaft. It seals the gap between the crankshaft and the timing cover or the engine block, ensuring that the oil stays within the engine. 2. Maintains Oil