BMW Coolant Expansion Tanks for BMW 5 Series E34 (1987-1995)

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On certain models, namely E36, E46, and E90, the factory BMW expansion tank is prone to either breaking at connection points or blowing apart altogether. If you're starting to feel like your expansion tank is on borrowed time, it's probably time to replace with either a direct OE replacement, or strengthen your cooling setup with an aluminum expansion tank - we offer numerous performance upgrades for your expansion tank. Especially if you're someone who likes to track your BMW, we recommend upgrading your expansion tank to avoid ruining your track day.
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Coolant Level Sensor - E30 87-91, E32 E34
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Febi - Corporate Logo
T#:1728
Part#: 61311378320
In Stock
$ 26.17

This product was last offered at the strikethrough price on
07-09-2026

$ 23.99 USD
Free Shipping on orders $49 and up
$ 23.99 USD
Free Shipping on orders $49 and up

Coolant level sensor for most E30, E32, and E34 cars. Fits E30 M3 and all E30 325's; E32 735, 740, and 750; and E34 530, 535, 540, and M5. 

Since the late 1800’s Febi has been fabricating replacement metal parts. This history is self evident in the quality and vast amount of applications they service. With more than 34,000 repair solutions for cars and commercial vehicles you can be sure Febi has you covered.

This item fits the following BMWs:
1987-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325is 325ic 325xi M3
1989-1995 E34 BMW 530i 535i 540i M5
1987-1989 E24 BMW 635csi M6
1988-1994 E32 BMW 735i 735il 740i 740il 750il

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Expansion Tank Cap - 1.4 Bar - E36 318i 323i 325i 328i M3
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Febi - Corporate Logo
T#:340717
Part#: 17111742232
Ships in 2 Business Days
$ 24.99

This product was last offered at the strikethrough price on
06-18-2026

$ 9.99 USD
Free Shipping on orders $49 and up
$ 9.99 USD
Free Shipping on orders $49 and up

This expansion tank cap, from the E30 325is, is designed to give way at 20 PSI instead of 30 PSI, like the stock cap. In the event the system over-pressurizes, this cap should let go first, potentially saving your radiator, hoses, or other vital cooling system components. While there's no guarantee it will save your radiator, this small part could mean the difference between calling a tow service and making it home, and a little extra insurance never hurt. This cap is a high-quality aftermarket part from an OE supplier.

Fits the Following BMWs:

E36 318i 323i 325i 328i M3

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Meyle Expansion Tank Cap
5X Entries Into Our F80 M3 Sweepstakes
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Meyle - Corporate Logo
T#:579357
Part#: 3148009004
In Stock
Sale - Save 40% $ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD
Free Shipping on orders $49 and up
Sale - Save 40%
$ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD
Free Shipping on orders $49 and up
Replace worn or missing pieces.

Meyle Expansion Tank Cap
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:5958735
Part#: 17111742232
Back Ordered
$ 10.99 USD
Free Shipping on orders $49 and up
Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. 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.
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