BMW 1/2 Series Engine Oil Filler Cap – Seals Oil Fill Opening & Maintains Proper Crankcase Pressure | OEM Part No. 11127582398 | Fits BMW F20/F21 & F30/F31 Platforms + MINI R55–R61

Maintain proper crankcase sealing and pressure balance with this OEM-quality Engine Oil Filler Cap, designed for BMW and MINI vehicles that use the factory oil filler cap system.

The oil filler cap seals the valve cover oil fill opening, preventing oil seepage, vapor escape, and contamination while supporting proper crankcase pressure control. A properly sealing cap is essential for stable engine operation and correct crankcase ventilation—especially on turbocharged applications where small vacuum/pressure leaks can trigger drivability issues.

Over time, oil filler caps deteriorate from heat cycling, oil vapor exposure, and gasket fatigue. Common symptoms include oil seepage at the valve cover, burning oil odor, vacuum leaks, rough idle, or crankcase ventilation-related faults. Because the cap directly affects sealing and pressure stability, replacement is recommended as soon as leakage, looseness, or gasket wear is present.

This replacement cap is manufactured to OEM specifications, including proper thread pitch, sealing surface geometry, and an integrated gasket design for consistent leak-free fitment. BMW/MINI used multiple filler cap designs depending on engine configuration and production date—VIN verification is strongly recommended prior to purchase.

Key Features

• OEM-quality oil filler cap assembly engineered for factory-style sealing and fitment
• Maintains crankcase pressure stability by preventing vacuum/pressure leaks at the valve cover fill point
• Helps prevent oil seepage and oil odor caused by worn cap gaskets or weakened locking tabs
• Integrated sealing gasket designed to maintain consistent sealing through heat cycles
• Direct replacement for the factory oil filler cap—installs in seconds with no modifications
• Restores proper sealing surface contact to support correct crankcase ventilation system performance

Important Fitment Notice

• Applies only to vehicles using OEM BMW/MINI part number: 11127582398
• BMW/MINI used different oil filler cap designs depending on engine and production date
• VIN verification is required to confirm compatibility and avoid installation issues

Installation Notes

• Remove the old cap and inspect the valve cover sealing surface for debris or oil residue
• Install the new cap and tighten until fully seated/locked
• After a short drive, re-check for proper sealing and any signs of oil seepage

FITMENT: Vehicles Using Oil Filler Cap 11127582398

(Production dates per your fitment guide)

BMW 1 Series

• F20 (07/2010–02/2015)
• F20 LCI (06/2014–06/2016)
• F21 (12/2011–02/2015)
• F21 LCI (06/2014–06/2016)

BMW 3 Series

• F30 (03/2012–07/2015)
• F30 LCI (03/2015–06/2016)
• F31 (08/2011–05/2015)

MINI

• R56 LCI (05/2009–11/2013)
• R55 Clubman LCI (05/2009–06/2014)
• R57 Cabrio LCI (04/2009–06/2015)
• R58 Coupé (12/2010–05/2015)
• R59 Roadster (01/2011–04/2015)
• R60 Countryman (01/2010–10/2016)
• R61 Paceman (03/2012–09/2016)

Applies only to vehicles using oil filler cap 11127582398.

Not compatible with F-series, B-series engines, diesel models, or M vehicles.

VIN verification required prior to purchase.

Please refer to the “Fitment” section in the product description for compatibility details.