Coolant Expansion Tank 17117573781 17117787039 17117573751 FEBI 223351 for BMW 3 Series E46 X3 E83 X5 E53 M52 M54 N42 N46 N52

Product Name: Coolant Expansion Tank / Coolant Reservoir / Radiator Overflow Tank

OE Reference: 17117573781

Interchange Numbers: 17117787039, 17117573751

Aftermarket Brand: FEBI

Brand Part Number: 223351

Vehicle Brand: BMW

Product Function:

The coolant expansion tank stores excess engine coolant and accommodates changes in coolant volume as the engine heats up and cools down. It is an important component of the engine cooling system.

Potential Vehicle Applications:

BMW 3 Series E46:

• 316i / 318i — selected N40, N42, N45, N46 engine applications
• 320i / 323i / 325i / 328i / 330i — selected M52, M54, N52 engine applications
• Selected 318d / 320d — M47 diesel applications

BMW X3:

• X3 E83 — selected 2.0i, 2.5i, 3.0i models
• Engine applications include N46, M54, and N52

BMW X5:

• X5 E53 3.0i — selected M54 engine applications

Engine Compatibility:

• M52 — selected 2.5L / 2.8L gasoline engines
• M54 — selected 2.5L / 3.0L gasoline engines
• N42 / N46 — selected 1.8L / 2.0L gasoline engines
• N52 — selected 2.5L / 3.0L gasoline engines
• M47 — selected diesel applications

Application Period: Approximately 1997–2010, depending on vehicle model, engine, and production date.

Important Fitment Information:

The applications listed above are preliminary references. Coolant reservoir designs may differ by engine, chassis, production date, and market specification. Please verify OE number 17117573781 and FEBI part number 223351 against the vehicle VIN before ordering.

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