Oil Filter Housing for BMW Z Series E85/6 (2003-2008)

If your M50, M52, or M54 engine takes a few seconds to build oil pressure after sitting, there's a good chance that your factory oil filter housing drain back valve has failed. Over time, the factory plastic check valve degrades, allowing oil to drain completely out of the housing and back into the oil pan while sitting. Every cold start essentially becomes a dry start, resulting in a loud ticking noise and causing unnecessary wear on your engine's internals.

Unfortunately, BMW does not offer this check valve as a standalone part, forcing you to purchase a costly, complete oil filter housing assembly just to fix one failed plastic component. Thankfully, our team of BMW enthusiasts took note of this common failure mode and designed a permanent, cost-effective fix.

Our Billet Oil Filter Housing Drain-Back Valve is designed as a direct-fit upgrade for your factory oil filter housing. CNC-machined from high-strength billet aluminum, this upgraded valve restores positive sealing to keep the oil filter housing fully primed. Maintaining this hydraulic prime ensures rapid oil pressure stabilization upon startup, directly mitigating dry-start bearing wear and top-end lifter starvation without requiring the purchase of a complete OEM housing assembly.

BMW Gray Filter Housing Cap - Blackline Performance Edition Oil is a premium upgrade designed to replace the standard OEM plastic oil filter housing cap. This high-quality billet aluminum cap enhances both the aesthetics and functionality of your BMW's engine.

• Durable Construction: Made from 6061 T6 aluminum with a hard anodized finish for superior strength and longevity.
• Improved Performance: Features better heat dissipation compared to the factory plastic cap, enhancing engine performance and reliability.
• Enhanced Aesthetics: Adds a sleek, high-performance look to your engine bay with 3D precision post-milled detailing and the G Insignia Oil Filter Cage Stabilizer.
• Easy Installation: CNC-formed hand grips and a 10mm Allen key maintenance port with a built-in scratch plate simplify the installation and maintenance process.
• Direct Replacement: Retains the factory oil filter stalk and is compatible with BMW S55 and most N series engines using BMW part 11427525334.
• Increased Longevity: Designed to increase the life span of your oil filter cap and provide a more reliable seal.

These aluminum filter housings are prone to cracking, which can lead to oil leaks and serious engine damage. To avoid such issues, it's essential to replace the entire housing and cooler assembly.

Fortunately, Febi provides a top-quality reproduction unit at a much lower cost than genuine parts. If you require a replacement filter housing, opting for Febi-Bilstein ensures a cost-effective and durable solution.