BMW Billet Aluminum Oil Cap - E9x M3-E6x M5/M6-E39 M5

BMW Billet Aluminum Oil Cap

Say goodbye to leaky oil caps and weak OEM designs. The EAE Motorsport Billet Oil Cap is engineered for high-performance BMWs that deserve better. This cap replaces the failure-prone factory unit with a CNC-machined 6061-T6 billet aluminum body, a thicker high-temp gasket, and a reinforced dowel pin locking system that never bends or loosens.

BMW’s factory cap uses thin stamped metal locking tabs that lose tension over time, especially under heat and vibration. The result? A cap that no longer seals tightly and slowly leaks oil onto your valve cover.

We fixed that — permanently. The EAE cap locks in tight and stays sealed, mile after mile. It’s the upgrade your engine bay needs, combining performance, reliability, and a clean motorsport look.

Features

• ✅ 6061-T6 Billet Aluminum: Precision CNC-machined for strength, heat resistance, and a perfect OEM-style fit.
  

• ✅ Anodized Finish (Black or Clear): Hard-anodized for corrosion resistance and long-lasting appearance.
  

• ✅ Upgraded High-Temp Gasket: Thicker than OEM, with improved sealing to eliminate leaks and oil residue.
  

• ✅ Steel Dowel Pin Locking System: Reinforced locking design with pressed-in steel dowel pins that won’t bend or fatigue like the thin factory tabs.
  

• ✅ OEM-Plus Feel: Motorsport-inspired styling with scalloped and knurled edges for easy grip and confident locking.
  

• ✅ Built to Last: Heat, pressure, and vibration-resistant — designed to outlast your engine

 Installs in Seconds — Just twist and lock into place.