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BMW Coolant Expansion Tanks for BMW E36 (1992-1998) M3

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 Expansion Tank - E36/E39/Z3 6 cylinder 1992-1998

10X Entries Into Our F80 M3 Sweepstakes

T#:338018

Part#: 17111723520

Ships in 1 Business Day

$ 97.99

This product was last offered at the strikethrough price on
05-03-2026

Starting at $ 63.18 USD

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Starting at $ 63.18 USD

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This high quality BEHR brand expansion tank is used on M50, M52, S50 and S52 engines, and is a common failure item on all E36 3 series with 6 cylinder engines (325/328/323 and M3) 1992-1999, Z3 with 2.8 liter, MZ3 Roadster/Coupe (S52), and E39 528i from 1997-1998. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be leary of competitors selling this part for less -- is it a BEHR? Probably not. We only carry the BEHR brand expansion tank as it is the only one we use in our own BMWs.

If you are overhauling your coolant system, now is the time to consider preventative replacing this expansion tank. These are known to go bad, causing a leak which can leave you stranded. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on.

Need a new coolant level sensor too? If your coolant level sender is bad, your on board computer will constantly display a "low coolant" message (unless your coolant is actually low...). If you're replacing your expansion tank, now is a great time to replace this failure prone sensor. If you want a new coolant level sensor, simply choose from the option below. Because there are different sensors for different year/model BMWs, please be as specific as possible when you give us your car info during checkout (model, year, production date). Thanks!

This item fits the following BMWs:
1992-1998 E36 BMW 323ic 325i 325is 325ic 328i 328is 328ic M3
1997-1998 E39 BMW 528i
1997-1998 Z3 BMW Z3 2.8
1998-2000 Z3 BMW M Roadster M Coupe (S52)

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OEM Mahle-Behr Coolant Expansion Tank - E36/E39/Z3 6 cylinder 1992-19...

T#:341101

Part#: 17111723520

Ships in 1 Business Day

$ 97.62

This product was last offered at the strikethrough price on
05-03-2026

$ 63.18 USD

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$ 63.18 USD

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Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

Febi Coolant Expansion Tank - E36, E39, Z3

We Price Match - Give Us A Call or Chat!

T#:363759

Part#: 17111723520

Ships on Nov 25, 2026

$ 54.99 USD

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$ 54.99 USD

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Does not include cap or coolant level sensor

Expansion Tank Cap - 1.4 Bar - E36 318i 323i 325i 328i M3

We Price Match - Give Us A Call or Chat!

T#:340717

Part#: 17111742232

In Stock

$ 24.99

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

$ 15.99 USD

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$ 15.99 USD

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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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OEM Behr Coolant Expansion Tank Cap 2.0 Bar - E36 E46 E34 E39 E32 E38...

T#:2766

Part#: 17111742231

Ships in 3 Business Days

$ 20.99

This product was last offered at the strikethrough price on
08-13-2026

$ 19.99 USD

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$ 19.99 USD

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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ic 323is 323ic 325i 325is 325ic 328i 328is M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1989-1995 E34 BMW 530i 535i 540i M5
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i 540i M5
1989-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
1990-1998 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2011 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2000-2006 E53 BMW X5 30.0i X5 4.4i X5 4.6is X5 4.8is
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Coupe M Roadster
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si M Roadster M Coupe
2000-2003 E52 BMW Z8 Z8 Alpina
2007+ E90 BMW 335i & 335xi

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Coolant Level Sensor for Early E36 6-cyl, E34 525i

For vehicles with production date up to 06/1995

We Price Match - Give Us A Call or Chat!

T#:1612

Part#: 61311384739

In Stock

$ 16.99 USD

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Qty

$ 16.99 USD

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Coolant Level Sensor. Fits all E34 525i's with the M20 and M50 engine, E36 325 and M3, with a production date of May 1995 or earlier, and E36 328 with a production date of Feb. 1996 or earlier.

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:
1992-1998 E36 BMW 318i 318is 318ti 318ic
1992-6/1995 E36 BMW 325i 325is 325ic M3
9/1995-3/1996 E36 BMW 328i 328is 328ici
1989-1995 E34 BMW 525i 525i Wagon

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Febi Coolant level sensor - E36, E39

For vehicles with production date from 06/1995

We Price Match - Give Us A Call or Chat!

T#:382276

Part#: 61318360855

In Stock

Sale - Save 29% $ 18.22

This product was last offered at the strikethrough price on
05-14-2026

$ 12.99 USD

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Qty

Sale - Save 29%

$ 18.22

This product was last offered at the strikethrough price on
05-14-2026

$ 12.99 USD

Add to Wish List

Monitors the coolant level in the expansion tank

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BMW Coolant Expansion Tanks for BMW E36 (1992-1998) M3

Coolant Expansion Tank - E36/E39/Z3 6 cylinder 1992-1998

OEM Mahle-Behr Coolant Expansion Tank - E36/E39/Z3 6 cylinder 1992-19...

Febi Coolant Expansion Tank - E36, E39, Z3

Expansion Tank Cap - 1.4 Bar - E36 318i 323i 325i 328i M3

OEM Behr Coolant Expansion Tank Cap 2.0 Bar - E36 E46 E34 E39 E32 E38...

Coolant Level Sensor for Early E36 6-cyl, E34 525i

Febi Coolant level sensor - E36, E39

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