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Expansion Tank Cap

Replace when performing cooling service.
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Product Details

The coolant expansion tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap.

Often times, the coolant is not kept under enough pressure to keep it from boiling or expanding too much. This cap keeps all the heat and liquid inside the coolant system for maximum efficiency. Should be replaced each time major coolant system service is performed.

Dress up your underhood and make everything functional with a new cap.

This Part Fits the Following Vehicles

Make Model Submodel Engine
All E46 325Ci M54 2.5L
All E46 325i M54 2.5L
All E46 325xi M54 2.5L
All E46 328Ci M52 2.8L
All E46 328i M52 2.8L
All E46 330Ci M54 3.0L
All E46 330i M54 3.0L
All E46 330xi M54 3.0L
All E46 M3 S54 3.2L
All E53 X5 M54 3.0L
All E53 X5 M62 4.4L
All E53 X5 M62 4.6L
All E53 X5 N62 4.4L
All E53 X5 N62 4.8L
All E65 745i N62 4.4L
All E65 750i N62 4.8L
All E65 760i N73 6.0L
All E66 745Li N62 4.4L
All E66 750Li N62 4.8L
All E66 760Li N73 6.0L
All E83 X3 M54 2.5L
All E83 X3 M54 3.0L
All E83 X3 N52 3.0L
All E90 335xi N54 3.0L
All E90 335xi N55 3.0L
All E92 335i N54 3.0L
All E92 335is N54 3.0L
All E92 335xi N54 3.0L
All E92 335xi N55 3.0L
All E93 335is N54 3.0L
All Z3 1.9 M44 1.9L
All Z3 2.3 M52 2.5L
All Z3 2.5i M54 2.5L
All Z3 2.8 M52 2.8L
All Z3 3.0i M54 3.0L
All Z3 M Coupe S52 3.2L
All Z3 M Coupe S54 3.2L
All Z3 M Roadster S52 3.2L
All Z3 M Roadster S54 3.2L
All Z4 2.5i M54 2.5L
All Z4 3.0i M54 3.0L
All Z4 3.0i N52 3.0L
All Z4 3.0Si N52 3.0L
All Z4 M Coupe S54 3.2L
All Z4 M Roadster S54 3.2L
BMW E30 318i M42 1.8L
BMW E30 318is M42 1.8L
BMW E31 840Ci M60 4.0L
BMW E31 840Ci M62 4.4L
BMW E31 850Ci M70 5.0L
BMW E31 850Ci M73 5.4L
BMW E32 735i M30 3.4L
BMW E32 735iL M30 3.4L
BMW E32 740i M60 4.0L
BMW E32 740iL M60 4.0L
BMW E32 750iL M70 5.0L
BMW E34 525i M20 2.5L
BMW E34 525i M50 2.5L
BMW E34 530i M60 3.0L
BMW E34 535i M30 3.4L
BMW E34 540i M60 4.0L
BMW E34 M5 S38 3.5L
BMW E36 318i M42 1.8L
BMW E36 318i M44 1.9L
BMW E36 318ic M42 1.8L
BMW E36 318ic M44 1.9L
BMW E36 318is M42 1.8L
BMW E36 318is M44 1.9L
BMW E36 318ti M42 1.8L
BMW E36 318ti M44 1.9L
BMW E36 323ic M52 2.5L
BMW E36 323is M52 2.5L
BMW E36 325i M50 2.5L
BMW E36 325ic M50 2.5L
BMW E36 325is M50 2.5L
BMW E36 328i M52 2.8L
BMW E36 328ic M52 2.8L
BMW E36 328is M52 2.8L
BMW E36 M3 S50 3.0L
BMW E36 M3 S52 3.2L
BMW E38 740i M60 4.0L
BMW E38 740i M62 4.4L
BMW E38 740iL M60 4.0L
BMW E38 740iL M62 4.4L
BMW E38 750iL M73 5.4L
BMW E39 525i M54 2.5L
BMW E39 528i M52 2.8L
BMW E39 530i M54 3.0L
BMW E39 540i M62 4.4L
BMW E39 M5 S62 5.0L
BMW E46 323Ci M52 2.5L
BMW E46 323i M52 2.5L
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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