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

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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Bav Auto Coolant Expansion Tank - E36 E39 Z3 M50 M52 S50 S52 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:638094

Part#: 17111723520

In Stock

Sale - Save 20% $ 39.99

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

$ 31.99 USD

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Qty

Sale - Save 20%

$ 39.99

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

$ 31.99 USD

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Replace your old expansion tank to prevent potential failure or leaks. Includes a brand new coolant level sensor. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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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.

Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:373102

Part#: 17111723520

In Stock

$ 30.99 USD

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$ 30.99 USD

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Does not include cap or coolant level sensor

E36 Mishimoto Black Aluminum Coolant Expansion Tank

Direct fitment with the Mishimoto fan shroud. Modification may be required with the OEM shroud.

T#:383861

Part#: MMRT-E36-92EBK

Back Ordered

$ 195.99 USD

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$ 195.99 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it. Mishimoto provides a one time fix for this issue with their new aluminum expansion tank. Features: Constructed from aluminum to prevent future cracking Multi function aluminum dipstick w/ knurled head Utilizes factory mounting points, hardware, and sensor (s) Can be used with either Mishimoto or OEM radiator And of course this product come with Mishimoto's lifetime warranty WARNING! Prog 65 may apply to this product.Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm.For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.

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Mishimoto Essentials Bundle - BMW E36 3

T#:51039948

Part#: MMB-E36-001

Ships in 3 Business Days

$ 1,150.99 USD

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$ 1,150.99 USD

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Each part in this bundle is selected to improve the E36's fluid dynamics and thermal stability.

Moroso Performance Aluminum Expansion Tank - E36, Z3

T#:568887

Part#: 63791

In Stock

$ 445.99

This product was last offered at the strikethrough price on
08-07-2026

$ 418.99 USD

Limited Qty Sale

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$ 445.99

This product was last offered at the strikethrough price on
08-07-2026

$ 418.99 USD

Limited Qty Sale

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If you have ever experienced a leaking plastic BMW expansion tank you will realize the value of this aluminum version straight away. Even if a failure has not happened to you, it's easy to tell this tank is much stronger and more durable than the plastic used in the stock design. The original BMW plastic tanks suffer from leaks and failures with no warning. While being lightweight and recyclable the design and construction of the stock tank is just not up for reliable long term use. Moroso coolant expansion tanks are all pressure tested for guaranteed leak-free operation and utilizes the stock pressure cap to prevent excessive pressure in the cooling system from blowing off a radiator hose or seal! Features: Each cooling system expansion tank includes a 1/8 in. pipe overflow fitting at neck, a 1/4 in. NPT water intake bung, and a 1/2 in. bung at the bottom for plumbing a line to the radiator Rugged 6061-T6 billet aluminum filler necks welded to tank to withstand continuous removal and installation of cap 100% pressure tested to eliminate leaks Accepts a standard-size radiator cap

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Coolant Level Sensor

For vehicles with production date from 06/1995

2X Entries Into Our F80 M3 Sweepstakes

T#:379491

Part#: 61318360855

Ships in 1 Business Day

$ 12.99 USD

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$ 12.99 USD

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Monitors the coolant level in the expansion tank

Bav Auto Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 X5 Z4 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:640208

Part#: 17117639022

In Stock

Sale - Save 15% $ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 USD

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Qty

Sale - Save 15%

$ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 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. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:640140

Part#: 17111712788

Ships on Sep 16, 2026

$ 3.99 USD

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$ 3.99 USD

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Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

Bav Auto Coolant Level Sensor - BMW E36 E39 M50/52 S50/52

For vehicles with production date from 06/1995

10X Entries Into Our F80 M3 Sweepstakes

T#:639793

Part#: 61318360855

In Stock

Sale - Save 19% $ 20.99

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

$ 16.99 USD

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Qty

Sale - Save 19%

$ 20.99

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

$ 16.99 USD

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This is the sensor / sending unit that notifies the computer if your coolant level is low. When this fails, it can give a false indication of low coolant -- or worse, not inform you of a low coolant situation that could potentially cause overheating. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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

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

Bav Auto Coolant Expansion Tank - E36 E39 Z3 M50 M52 S50 S52 ...

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

Coolant Expansion Tank

E36 Mishimoto Black Aluminum Coolant Expansion Tank

Mishimoto Essentials Bundle - BMW E36 3

Moroso Performance Aluminum Expansion Tank - E36, Z3

Coolant Level Sensor

Bav Auto Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 X5 Z4 ...

Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

Bav Auto Coolant Level Sensor - BMW E36 E39 M50/52 S50/52

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

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