BMW 3 Series E46 Engine Oil Cooler / Oil Filter Housing Heat Exchanger – OEM Part No. 11427508967 – Regulates Oil Temperature & Restores Factory Lubrication Cooling | Fits BMW E46 316i & 318i Models with N40, N42, N45 & N46 Engines (EU Models Only)

Maintain proper engine lubrication and temperature control with this OEM-style Engine Oil Cooler / Oil Filter Housing Heat Exchanger, designed for BMW applications equipped with a factory oil-to-coolant cooling system.

This component regulates engine oil temperature by transferring excess heat from the oil into the vehicle’s cooling system. By stabilizing oil temperatures, it helps preserve oil viscosity, reduce thermal stress, and ensure consistent lubrication during everyday driving and extended operation.

Over time, constant heat cycling and internal wear can cause oil filter housing heat exchangers to degrade, leading to oil seepage, coolant contamination, unstable oil temperatures, or unexplained coolant loss. Because this unit interfaces directly with both the lubrication and cooling systems, proper replacement is essential to prevent further engine or cooling system damage.

This replacement unit is manufactured to OEM dimensions and flow specifications, ensuring correct alignment with factory oil and coolant passages. When installed with new seals and proper cooling system bleeding, it restores factory oil cooling efficiency and reliable heat exchange performance.

BMW used oil filter housing–mounted heat exchangers across multiple platforms and engine configurations. Fitment varies by engine, chassis, production date, and market, making VIN verification strongly recommended prior to purchase.

Key Features

• OEM-style engine oil cooler / oil filter housing heat exchanger
• Helps regulate oil temperature and maintain lubrication performance
• Supports stable engine operation under normal driving conditions
• Precision-machined sealing surfaces for leak-free operation
• Direct replacement for factory oil-to-coolant heat exchanger systems

Important Fitment Notice

This product applies only to vehicles equipped with a factory oil-to-coolant heat exchanger. BMW used multiple oil cooling designs depending on engine and market.

VIN verification is recommended to confirm correct application and avoid installation issues.

Installation Notes

• Replace all required seals/gaskets/O-rings during installation (cooler-to-housing and coolant connections as applicable).
• After installation, bleed the cooling system properly and verify no oil/coolant leaks.
• VIN verification is required, since BMW cooling/oil heat exchanger configurations can vary by engine, production date, and chassis even within the same series.

FITMENT: BMW 3 Series – E46 (EU Models Only)

• E46 316i Sedan – N40 / N42 / N45 / N46
• E46 316i Touring – N42 / N46
• E46 316ti Compact – N40 / N42 / N45 / N46
• E46 316Ci Coupe – N40 / N45
• E46 318i Sedan – N42 / N46
• E46 318i Touring – N42 / N46
• E46 318ti Compact – N42 / N46
• E46 318Ci Coupe – N42 / N46
• E46 318Ci Convertible – N42 / N46

EU-market petrol inline-4 models only.

Applies only to vehicles equipped with factory oil filter housing heat exchanger.

Not compatible with M52, M54, S54, US-spec, or M models.

VIN verification required.

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