Broyear Low-Temp Oil Cooler Thermostat Valve — N54/N55 E/F Chassis
by broyear
Key Features
- Opens earlier than OEM to route oil through cooler sooner, reducing peak temps
- Machined aluminum alloy with anodized surface finish for corrosion resistance
- Direct drop-in replacement for factory thermostat in existing oil cooler circuit
- Covers E82, E88, E9X, E60/61, and F2X/F3X chassis with N54 or N55 engines
- Requires vehicle to already be equipped with an oil cooler for installation
- Ideal for modified, tuned, or track-driven N54/N55 builds needing tighter thermal control
Product Details
- Brand
- broyear
- Part #
- BM32
- Category
- Oil Coolers
- ASIN
- B0F7R1SL38
Check if it fits your BMW
Broyear Low-Temp Oil Cooler Thermostat Valve — N54/N55 E/F Chassis — Overview
Sustained high oil temperatures are a silent killer for turbocharged engines, and the factory thermostat valve on N54 and N55 motors simply wasn't calibrated with aggressive street use or track sessions in mind. Broyear's low-temperature oil cooler thermostat valve addresses this directly — it opens earlier than the OEM unit, sending oil through the cooler circuit sooner and holding operating temps in a tighter, more protective range before heat stress has a chance to degrade your oil's viscosity and film strength.
The valve itself is machined from aluminum alloy and treated with an anodized surface finish, giving it genuine corrosion resistance and a cleaner appearance than the plastic-heavy OEM component it replaces. It installs into the existing oil cooler thermostat housing in the oiling system — no fabrication, no adapter fittings. Because it slots into the factory location, the swap is straightforward for anyone comfortable working in the engine bay, though your BMW must already be equipped with an oil cooler for this part to be applicable.
Fitment spans an impressively wide range of N54 and N55 applications: E82 and E88 135i and 1M, E90 through E93 335i and 335xi, E60 and E61 535i and 535xi, and F-chassis models including the M135i, M235i, 335i, 435i, 535i, and 640i from 2012 onward. Whether you're running a stage tune, pushing higher boost, or just logging spirited miles regularly, this is a precise, mechanically sound upgrade that adds a meaningful layer of engine protection without touching anything else in your cooling setup.
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