This product is not compatible with the vehicles entered. Please go back to the shop page or contact us.

QuickFinder

Start here to get the right parts for your car

Edit
Browsing:
Reset
Start by entering your vehicle above to find the right parts.
Find your vehicle
Return to

Expansion Tank Cap

Expansion Tank Cap

Regular price $29
Regular price Sale price $29
Priced Individually (GST included)
The highest quality overflow expansion tank cap from BMW supplier, Reutter.
Skip to product information
1 of 3

Expansion Tank Cap

Expansion Tank Cap

Regular price $29
Regular price Sale price $29
Priced Individually (GST included)
The highest quality overflow expansion tank cap from BMW supplier, Reutter.
Please note: this product is not compatible with the vehicles entered. Please go back to the main store page or contact us for help.
If we say a product is in stock, then it’s in our Melbourne warehouse ready to ship. All orders placed before 1 p.m. ship same day, Monday to Friday.
In stock
Quantity not available. We're sorry, we currently have in stock.
View Fitments
DESCRIPTION

This is the exact same expansion tank cap as originally fitted at the factory—ensuring perfect fitment, correct pressure regulation, and long-term reliability.

A faulty coolant cap can lead to poor system pressure, coolant leaks, or even overheating. If you’re replacing your expansion tank, dealing with cooling system issues, or simply performing preventative maintenance, this is the correct cap to use.

Suitable for a wide range of late-model BMWs, including E90, F10, F30, E70 X5, and many others, this OE cap is designed to maintain the specified pressure in your cooling system—just as BMW intended.

HELPFUL TIPS

The expansion tank cap also acts as a safety valve, designed to release pressure before your hoses, fittings, and radiator bursts.

PART NUMBERS
OEM Part Number: 17117639020 Alternative Part Number: 17117521071

Please note: Part numbers are provided for reference only. For correct compatibility to your vehicle, please follow our fitment advice

MORE DETAILS
ManufacturerOEM Supplier*
Requried Per Car1
Fitments