Billet Oil Thermostat Cover Set for BMW N55, N54 and S55
Upgrade your BMW N55, N54 or S55 engine with the MMR Performance Oil Thermostat Cover Set. Precision machined from T6061 billet aluminium and anodised in Deep Gloss Black, this direct replacement for the OE plastic thermostat cover delivers OEM-plus looks, long-term reliability and a premium finish that transforms your engine bay.
The fragile factory plastic covers are known to crack and weep as mileage builds. Swap to this billet thermostat housing cover to reduce the risk of leaks while adding a clean, motorsport-inspired aesthetic. Installation is straightforward and the finished result speaks for itself.
Why choose this BMW oil thermostat cover
- Direct replacement for BMW N55, N54 and S55 thermostat cover
- T6061 billet aluminium construction for strength and durability
- Anodised Deep Gloss Black finish for a premium, OEM-plus look
- Optional version with integrated 1/8 NPT port for oil pressure or oil temperature sensor or gauge
- Reduces risk of cracking and leaking versus OE plastic parts
- Perfect fitment and easy installation
We have fitted these covers on customer cars and our own builds. Feedback has been excellent, with owners praising the quality, the precise fit and the clean, high-end finish in the engine bay.
Vehicle compatibility
Designed for BMW models equipped with N54, N55 and S55 engines, including:
- 1 Series E82 E88 and F20 F21 135i, 1M, M135i, M135i xDrive 2007 to 2019
- 2 Series F22 F23 M235i, M235i xDrive 2015 to 2019
- 3 Series E90 E91 E92 E93 and F30 F31 335i, 335i xDrive, M3 2007 to 2019
- 4 Series F32 F33 435i, 435i xDrive, M4 2015 to 2019
What you get
- MMR Performance billet thermostat cover in Deep Gloss Black
- Optional additional cap with integrated 1/8 NPT thread for sensor or gauge take-off select when ordering
Fitting and support
Professional fitting available at Nforcd in Warwickshire. Request a quote via Sales@nforcd.com.
Notes
- If you plan to fit an oil pressure sensor or oil temperature gauge, please select the optional 1/8 NPT threaded piece.
- Prolonged exposure to excessive heat can affect the appearance of anodised aluminium finishes.
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Fitting guide: Download the installation instructions