A4031803938S Mercedes-Benz OM 421 Oil Cooler Cover

What does an oil cooler cover do?

This oil cooler cover serves as a critical component within the engine cooling system, specifically designed to enclose the oil cooler housing. By securing the cooling core bundle in its seat on the engine block, it maintains the necessary sealing surfaces that keep engine oil and coolant in separate, controlled circuits. This part is essential for preventing internal leaks and managing the thermal load during heavy-duty operation.

Vehicle and engine compatibility

This specific cover is compatible with Mercedes-Benz O 303 trucks featuring the OM 421 engine. It is engineered to withstand the high-pressure environments found in heavy commercial vehicle engines, ensuring that oil transfer channels remain intact. The component is built to meet the precise fitment requirements of the original engine assembly.

Installation and maintenance guidance

For technicians performing engine maintenance, this cover features a sensor connection point to ensure accurate system monitoring. When replacing an oil cooler cover, it is vital to inspect the sealing surfaces and mounting bolts to ensure a leak-free installation. Maintaining this component helps prevent overheating and protects critical engine components like bearings and the turbocharger.

Troubleshooting and selection

Always verify that the part matches the specific engine configuration of the vehicle to ensure proper thermal management and pressure containment.

OE cross-reference

0101 049 (Oil Cooler Cover) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number A4031803938S.