403 180 3938 Oil Cooler Cover for Mercedes-Benz OM 421

What does an oil cooler cover do?

This oil cooler cover functions as a critical component within the engine cooling system, specifically designed to enclose the oil cooler housing. It holds the cooling core bundle securely in its seat on the engine block, ensuring that oil and coolant remain in separate, controlled circuits. By maintaining this separation, the part prevents cross-contamination and protects critical engine components from thermal stress.

Compatible vehicles and engines

This specific part is compatible with Mercedes-Benz O 303 vehicles equipped with OM 421 and OM 421 A engines. It is engineered to meet the rigorous demands of heavy commercial vehicle operation, providing a reliable seal for the oil radiator assembly.

Installation and maintenance

For workshop technicians performing engine maintenance, this cover includes essential sealing surfaces and oil transfer channels. When replacing this component, ensure that all bolt loads are checked and that sensor connections are properly seated to maintain optimal pressure within the circuit.

Troubleshooting and selection

Regular inspection of the oil cooler cover can help prevent leaks and maintain stable oil temperatures. If you notice signs of coolant in the oil or external leaks near the engine block, consult your authorized distributor to verify exact fitment requirements.

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 4031803938.