
HFE BMW Billet Oil Filter Cap | N20 N26 N52 N54 N55 S55
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Upgrade the weak factory plastic oil filter cap with the HFE Billet Aluminium Oil Filter Cap. CNC-machined for strength, durability and easy servicing, this is a direct replacement for a known BMW failure point across turbo and non-turbo engines.
Key Features +
- Billet Aluminium Construction: Far stronger and more durable than the OEM plastic cap.
- 21mm Hex Head Design: Makes removal and installation simple using standard tools.
- No Special Tools Required: Eliminates the need for the fragile OEM plastic tool interface.
- Precision CNC-Machined: Latest-generation CNC machining ensures perfect thread fit and sealing surface.
- Anodised Finish: Provides corrosion resistance and long-term durability.
- Includes Seal O-Ring: Supplied complete with a new O-ring for proper sealing.
Why Upgrade Your Oil Filter Cap? +
- Prevents oil leaks from cracked or distorted plastic caps.
- Improves long-term reliability for daily and performance vehicles.
- Makes oil changes easier and safer.
- Ideal for high-temperature turbocharged engines.
- A simple preventative upgrade with long-term benefits.
OEM Part Numbers +
Replaces the following BMW part numbers:
- 11 42 7 525 334 (11427525334)
- 11 42 7 566 133 (11427566133)
Technical Specifications +
- Material: Billet Aluminium
- Manufacturing Process: CNC-Machined
- Finish: Anodised
- Hex Size: 21mm
- Package Includes: 1x Oil Filter Cap + Seal O-Ring
Engine Compatibility +
- N20
- N26
- N51 (non-turbo)
- N52 (non-turbo)
- N54
- N55
- S55
Vehicle Fitment +
Fits a wide range of BMW models including:
- 1 Series: E82 / E88 (2008–2013)
- 3 Series: E90 / E91 / E92 / E93 (2006–2013), F30 / F31 / F34 (2012–2019)
- 4 Series: F32 / F33 / F36 (2014–2020)
- 5 Series: E60 / E61, F10 / F11
- 6 Series: F12 / F13 (640i)
- 7 Series: F01 / F02
- X Models: X1, X3, X4, X5, X6
- Z Models: Z4 E85 / E86 / E89
- M Models: F80 M3, F82/F83 M4, F87 M2 Competition
Installation +
- Remove the factory plastic oil filter cap.
- Transfer the oil filter and supplied O-ring.
- Install the HFE billet cap and torque to BMW specification.
- No modification required.
Why Choose HFE +
High Flow Engineering develops precision-engineered upgrades in partnership with DC Prestige, focusing on eliminating known BMW weaknesses through CNC machining, quality materials and OEM-plus fitment.
Frequently Asked Questions +
Q: Does this include an oil filter?
A: No – the kit includes the billet oil filter cap and a new sealing O-ring only.
Q: Can this be overtightened?
A: Torque to BMW specification as normal. The aluminium construction prevents distortion but torque specs should still be followed.

