Basically, its job is to keep oil in and dirt out. It sits around a rotating shaft – usually the camshaft in this case – and creates a tight barrier. It's a pretty simple part, but really critical. It’s designed to allow the shaft to spin freely while still preventing leaks. Think of it acting like a shield between the engine’s oil and the outside world. This seal is specifically for the camshaft, which controls the timing of the valves. It keeps the oil that lubricates the camshaft contained within the engine. Without a good seal, that oil will leak out, and that’s bad news. It's part of the valve train, so it’s right up in the engine where a lot is happening. A leaking shaft seal can cause a noticeable oil leak, of course. You’ll notice if it’s bad – usually a puddle of oil under the front of your engine, or you might smell burning oil. But more seriously, losing oil pressure from a leak can cause significant engine damage over time. It can wear down bearings and eventually lead to bigger, more expensive repairs. Thankfully, they aren't too hard to replace, and you can find a good quality one at places like Fixparts Online. It’s a relatively inexpensive part considering the trouble it saves you. Top-rated performance: Shaft Seal (MPN 23121201279) has a 12-month warranty!

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• Get parts made specifically for your BMW, so they fit and work perfectly. • BMW parts are known for their high quality and durability, meaning they last longer. • Using genuine BMW parts helps maintain your vehicle’s value. • You can trust BMW parts to keep your car running smoothly and safely. BMW – trusted quality, available at FixParts Online!