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

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T#:638094

Part#: 17111723520

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Sale - Save 20% $ 39.99

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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.

Bav Auto Coolant Expansion Tank - E53 X5, E46, E83 X3

10X Entries Into Our F80 M3 Sweepstakes

T#:640496

Part#: 17137787039

In Stock

Sale - Save 18% $ 61.99

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

$ 50.99 USD

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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. 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.

Coolant Expansion Tank Cap

10X Entries Into Our F80 M3 Sweepstakes

T#:36032339

Part#: 17117639020

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Sale - Save 20% $ 14.99

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

$ 11.99 USD

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$ 14.99

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$ 11.99 USD

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Bav Auto Coolant Expansion Tank - BMW E90 335d M57 3.0L

10X Entries Into Our F80 M3 Sweepstakes

T#:640493

Part#: 17138570079

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Sale - Save 20% $ 78.99

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

$ 63.19 USD

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Sale - Save 20%

$ 78.99

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$ 63.19 USD

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Replace your damaged expansion tank to prevent coolant loss or potential overheating issues. 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.

Coolant Expansion Tank

10X Entries Into Our F80 M3 Sweepstakes

T#:36032353

Part#: 17111741167

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$ 60.99 USD

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$ 60.99 USD

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Engine Coolant Expansion Tank

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T#:30729009

Part#: 17138677649

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Sale - Save 12% $ 85.99

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

$ 75.59 USD

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$ 85.99

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Coolant Expansion Tank

10X Entries Into Our F80 M3 Sweepstakes

T#:30728965

Part#: 17137823626

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Sale - Save 20% $ 47.99

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05-03-2026

$ 38.34 USD

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Bav Auto Coolant Expansion Tank - With Level Sensor - E70 X5, E71 X6 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:638093

Part#: 17138621092

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05-03-2026

$ 48.79 USD

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Coolant Expansion Tank - 17111436381

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T#:36303285

Part#: 17111436381

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Sale - Save 39% $ 65.99

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05-03-2026

$ 40.00 USD

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BMW E39 Coolant Expansion Tank is an essential component designed to maintain the proper coolant level in your vehicle's cooling system. Manufactured with high-quality materials, this expansion tank ensures reliable performance and durability, preventing engine overheating by accommodating the expansion of coolant as it heats up. The kit includes a level sensor and cap, providing everything needed for a seamless installation. This expansion tank is specifically engineered to meet the exact specifications of your BMW E39, offering a perfect fit and optimal functionality.

Complete Kit: Includes level sensor and cap for easy installation. High-Quality Construction: Built with durable materials for long-lasting performance. Prevents Overheating: Helps manage coolant expansion, ensuring engine protection. Exact Fit: Designed to meet the precise specifications of your BMW E39. Enhanced Reliability: Ensures proper coolant level maintenance for optimal cooling system function.

Coolant Expansion Tank W/O Cap

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T#:639188

Part#: 17137529273

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Sale - Save 16% $ 38.99

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

$ 32.94 USD

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

T#:2766

Part#: 17111742231

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$ 20.99

This product was last offered at the strikethrough price on
09-10-2026

$ 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

OE BMW Coolant Expansion Tank Cap - E90 E92 F30 F32 F10 F12 F06 ...

T#:19454

Part#: 17117639020

In Stock

22% off MSRP $ 34.96

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.27 USD

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22% off MSRP

$ 34.96

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.27 USD

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This radiator expansion tank cap is used most BMW's from 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.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
2008-2013 E82 BMW 128i 135i 135is 1M Coupe
2014+ F22 BMW 228i 228i xDrive M235i M235i xDrive
2012+ F30 BMW 320i 320i xDrive 328d 328d xDrive 328i 328i xDrive 335i 335i xDrive - Sedan
2013+ F31 BMW 328i xDrive 328d xDrive - Wagon
2014+ F34 BMW 328i xDrive GT, 335i xDrive GT - Gran Tourismo
2013+ F32 BMW 428i 428i xDrive 435i 435i xDrive - Coupe
2013+ F33 BMW 428i Convertible 428i xDrive Convertible 435i Convertible 435i xDrive Convertible- Convertible
2014+ F36 BMW 428i Gran Coupe 428i xDrive Gran Coupe 435i Gran Coupe 435i xDrive Gran Coupe
2014+ F07 BMW 535i GT, 535i xDrive GT
2012+ F10 BMW 528i 528i xDrive 535i 535i xDrive 535d 535d xDrive
2011+ F10 BMW 528i 528i xDrive 535i 535i xDrive 535d 535d xDrive
2012+ F12 BMW 640i 640i xDrive 650i 650i xDrive
2013+ F06 BMW 640i Gran Coupe 640i xDrive Gran Coupe 650i Gran Coupe 650i xDrive Gran Coupe
2009+ F01 BMW 740i 740li 740li xDrive 740ld xDrive 750i 750li 750i xDrive 750li xDrive 760li
2013+ E84 BMW X1 sDrive28i X1 xDrive28i X1 xDrive35i
2011+ F25 BMW X3 xDrive28i X3 xDrive28d X3 xDrive35i
2015+ F26 BMW X4 xDrive28i X4 xDrive35i
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i X5 xDrive50i X5M
2014+ F15 BMW X5 sDrive35i X5 xDrive35d X5 xDrive35i X5 xDrive50i
2008-2014 E71 BMW X6 xDrive35i X6 xDrive50i X6M

Turner Motorsport Aluminum Coolant Expansion Tank Relocation Kit - E9...

10X Entries Into Our F80 M3 Sweepstakes
Compatible with hotside and coldside (OE location) intakes

T#:568369

Part#: 021942TMS13

In Stock

Sale - Save 15% $ 815.99

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

$ 693.59 USD

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$ 693.59 USD

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Hotside intakes are a very common modification for N54 powered BMWs. Here at Turner Motorsport, we found ourselves unsatisfied with all existing solutions to relocate the coolant expansion tank to the cold side of your engine bay, freeing up real estate on the hot side. We decided to make an end all be all solution for people looking to relocate your expansion tank that's compatible with both hotside intakes and factory location coldside intakes. All CAD designed in-house, our N54 aluminum expansion tank relocation kit allows you to seamlessly mount our new aluminum expansion tank on the cold side of your engine bay.

Blackline Performance Coolant Expansion Tank Cap Cover - BMW M - Red ...

T#:641289

Part#: FXXCET-R

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$ 65.00 USD

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$ 65.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired red color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

Turner Motorsport HD Aluminum Coolant Expansion Tank Kit - M50/M52/S5...

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T#:9998526

Part#: 008348LA01BKT

Ships on Oct 13, 2026

Sale - Save 20% $ 423.99

This product was last offered at the strikethrough price on
06-14-2026

$ 339.19 USD

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$ 423.99

This product was last offered at the strikethrough price on
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Our Turner Motorsport's full aluminum expansion tank was designed and engineered in house to help with the weak point in your E36 cooling system. The coolant expansion tank goes through heat cycles over and over again from regular driving, it is important that your expansion tank is doing its job to retain coolant to keep your engine operating temperatures down and keep your engine bay clean. Not only is this a major upgrade but also a great maintenance item to replace. Our expansion tank was designed to fit the OEM hoses for an easy install and comes with all the upgraded items you will need for a clean install,

If your E36 needs a new expansion tank, make sure this is the last expansion tank you ever need to buy. Our coolant expansion tank has a full aluminum construction and wrinkle black powder coat for durability. Expansion tank kit comes with all the accessories you need to replace your expansion tank once, and never have to worry about it again.

Aluminum Coolant Expansion Tank Features:

- Maintains stock coolant capacity and expansion volume

- Designed to maintain OE coolant elevation, preventing air pockets

- Baffled tank ensures that air pockets cannot be introduced during aggressive driving and provides accurate coolant level reading

- Carefully designed bleed passage prevents the introduction of air as the engine cools

- Turner engraved internal fill level

- TIG welded 5052 aluminum construction

- All bungs are machined to fit factory hose ends

Kit contents:

Turner Aluminum Expansion Tank
Coolant level sensor
Expansion tank cap
Heavy duty bleeder screw
Flared coolant pressure release line
Hardware for installation

Coolant Expansion Tank Cap - E9x M3, E60 E63 F01 E70 E71

T#:194502

Part#: 17117639021

In Stock

22% off MSRP $ 34.96

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.29 USD

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22% off MSRP

$ 34.96

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.29 USD

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This radiator expansion tank cap is used most BMW's from 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.

Genuine BMW Engine Coolant Expansion Tank Cap - 17135A1BD89

T#:29699315

Part#: 17135A1BD89

In Stock

6% off MSRP $ 34.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 32.99 USD

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6% off MSRP

$ 34.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 32.99 USD

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Genuine BMW Coolant Expansion Tank - E53 X5, E46 M52/54, E83 X3 ...

T#:360752

Part#: 17117573781

In Stock

$ 173.21 USD

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$ 173.21 USD

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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.

Genuine BMW Coolant Expansion Tank - E46 M3

T#:13185

Part#: 17112283344

In Stock

7% off MSRP $ 215.23

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 199.98 USD

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7% off MSRP

$ 215.23

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 199.98 USD

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This radiator coolant reservoir/expansion tank for E46 M3 is a common failure item as the plastic weakens over time and stress crack will lead to coolant leaks. If your car has over 80k miles and hasn't had one of these replaced, we highly recommend it during your next major service. We have found that the aftermarket coolant reservoirs fail easier than the original BMW piece so we only offer the BMW type on this part.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
2001-2006 E46 BMW M3

URO Coolant Expansion Tank - E30 325e 325i 88-91

2X Entries Into Our F80 M3 Sweepstakes

T#:2453609

Part#: 17111712641

In Stock

$ 46.99 USD

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$ 46.99 USD

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Coolant Expansion Tank Hose -Z3

T#:6936

Part#: 11531436122

In Stock

$ 55.99 USD

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$ 55.99 USD

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This is the engine coolant hose that goes from the coolant reservoir / expansion tank to the top of the radiator. When replacing any cooling component it is a good idea to check all radiator hoses and replace as necessary.

This item fits the following BMWs:
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2001-2002 Z3 BMW Z3 M Roadster M Coupe

Febi Coolant Expansion Tank Cap - E90 E92 F30 F32 F10 F12 F06 ...

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T#:340719

Part#: 17117639020

In Stock

$ 16.99 USD

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$ 16.99 USD

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This radiator expansion tank cap is used most BMW's from 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.

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:
2008-2013 E82 BMW 128i 135i 135is 1M Coupe
2014+ F22 BMW 228i 228i xDrive M235i M235i xDrive
2012+ F30 BMW 320i 320i xDrive 328d 328d xDrive 328i 328i xDrive 335i 335i xDrive - Sedan
2013+ F31 BMW 328i xDrive 328d xDrive - Wagon
2014+ F34 BMW 328i xDrive GT, 335i xDrive GT - Gran Tourismo
2013+ F32 BMW 428i 428i xDrive 435i 435i xDrive - Coupe
2013+ F33 BMW 428i Convertible 428i xDrive Convertible 435i Convertible 435i xDrive Convertible- Convertible
2014+ F36 BMW 428i Gran Coupe 428i xDrive Gran Coupe 435i Gran Coupe 435i xDrive Gran Coupe
2014+ F07 BMW 535i GT, 535i xDrive GT
2012+ F10 BMW 528i 528i xDrive 535i 535i xDrive 535d 535d xDrive
2011+ F10 BMW 528i 528i xDrive 535i 535i xDrive 535d 535d xDrive
2012+ F12 BMW 640i 640i xDrive 650i 650i xDrive
2013+ F06 BMW 640i Gran Coupe 640i xDrive Gran Coupe 650i Gran Coupe 650i xDrive Gran Coupe
2009+ F01 BMW 740i 740li 740li xDrive 740ld xDrive 750i 750li 750i xDrive 750li xDrive 760li
2013+ E84 BMW X1 sDrive28i X1 xDrive28i X1 xDrive35i
2011+ F25 BMW X3 xDrive28i X3 xDrive28d X3 xDrive35i
2015+ F26 BMW X4 xDrive28i X4 xDrive35i
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i X5 xDrive50i X5M
2014+ F15 BMW X5 sDrive35i X5 xDrive35d X5 xDrive35i X5 xDrive50i
2008-2014 E71 BMW X6 xDrive35i X6 xDrive50i X6M

Mahle-Behr Coolant Expansion Tank - E30

T#:399336

Part#: 17111712641

In Stock

$ 56.99

This product was last offered at the strikethrough price on
08-14-2026

$ 50.99 USD

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$ 50.99 USD

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Mahle-Behr Coolant Expansion Tank - E46, E53, E83

T#:1735

Part#: 17117573781

In Stock

$ 100.99

This product was last offered at the strikethrough price on
04-01-2026

$ 82.99 USD

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$ 82.99 USD

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This coolant reservoir is for the non-M E46 3-series models from 1999-2006 (M3 takes a different expansion tank). 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. This is the most recent expansion tank design from Hella-Behr, the OEM supplier to BMW. It replaces the original BMW part number 17137787039.

Other items to consider replacing at the same time are the radiator cap, coolant level sensor, lower radiator hose, coolant temp sensor in the lower hose, and the hose clamps. If your car has an automatic transmission you should also replace the oil cooler thermostat in the radiator frame, which is a common source for leaks.

This coolant expansion tank fits:

1999-2006 E46 3 series - 323i, 323Ci, 325i, 325Ci, 325xi, 328i, 328Ci, 330i, 330Ci & 330xi (**no M)
2004-2008 X3 SAV - X3 2.5, X3 3.0, X3 3.0si
2000-2005 X5 SAV - X5 3.0

BMW E9X Z4 E8X Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:402142

Part#: 17137640514

In Stock

$ 70.99

This product was last offered at the strikethrough price on
06-22-2026

$ 70.35 USD

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$ 70.35 USD

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Turner Motorsport Aluminum Coolant Expansion Tank Relocation Kit - E8...

10X Entries Into Our F80 M3 Sweepstakes
Compatible with hotside and coldside (OE location) intakes

T#:568368

Part#: 021942TMS14

In Stock

Sale - Save 13% $ 815.99

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

$ 708.04 USD

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Sale - Save 13%

$ 815.99

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$ 708.04 USD

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Hotside intakes are a very common modification for N54 powered BMWs. Here at Turner Motorsport, we found ourselves unsatisfied with all existing solutions to relocate the coolant expansion tank to the cold side of your engine bay, freeing up real estate on the hot side. We decided to make an end all be all solution for people looking to relocate your expansion tank. All CAD designed in-house, our N54 aluminum expansion tank relocation kit allows you to seamlessly mount our new aluminum expansion tank on the cold side of your engine bay, featuring an integrated power steering pump reservoir mount. During the design process, we did everything possible to ensure no air pockets could develop in the cooling system even during spirited drives. The baffled tank is all TIG welded 5052 aluminum construction, featuring a carefully designed bleed passage. We also machined all of our bungs to accept OEM hose ends, to keep the fit and finish as OE+ as possible. Keeping with this same mindset, we made sure that coolant elevation matches OE exactly, and integrated a power steering pump reservoir mount. Our aluminum expansion tank accepts the OE coolant level sensor, bleeder screw, and coolant cap, but we include new ones with this kit, as we thought you should replace them during installation. See more about these features in the list below, and if you have any additional questions please feel free to call into our staff of skilled BMW enthusiasts at 1-800-280-6966. Find our Installation Guide HERE Features and benefits: TIG welded 5052 aluminum construction, wrinkle black powder coated Utilizes factory coolant capacity and expansion volume CAD designed to retain OE coolant elevation, which prevents air pockets Baffled tank ensures that air pockets will not be created under spirited driving conditions, and ensures accurate coolant level reading Meticulously designed bleed passage prevents air pockets while the engine cools All bungs machined for factory hose end compatibility (no barb fittings!) Integrated power steering reservoir mount Kit includes Turner Motorsport aluminum expansion tank, Turner Motorsport wiring harness, all necessary hoses, hardware, OE level sensor, bleeder screw, and coolant cap This product fits the following BMWs: 2008-2013 E82 135i 2007-2013 E88 135i

E36 Mishimoto Polished Aluminum Coolant Expansion Tank

T#:383860

Part#: MMRT-E36-92E

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$ 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.

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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Blackline Performance Coolant Expansion Tank Cap Cover - Gray - BMW M...

T#:641288

Part#: FXXCET

In Stock

$ 65.00 USD

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Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized with an Anthracite Gray color to compliment the factory engine cover. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.

Coolant Expansion Tank

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T#:592020

Part#: 17137640515

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$ 97.99 USD

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$ 97.99 USD

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Coolant Expansion Tank - E30 325e 325i thru 1987 528e thru 88 ...

T#:2061

Part#: 17111707540

Ships in 3 Business Days

2% off MSRP $ 164.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 160.99 USD

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2% off MSRP

$ 164.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 160.99 USD

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This radiator expansion tank (coolant reservoir) is used on E30 325e 325es 325i 325is 325ic from 1984-1987 and E28 528e 1982-1987.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
1984-1987 E30 BMW 325e 325es 325i 325is 325ic 325ix
1982-1988 E28 BMW 528e

Meyle Coolant Expansion Tank - E53 X5, E46 M52/54, E83 X3

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T#:369184

Part#: 17117573781

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$ 66.99 USD

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$ 66.99 USD

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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.

Other items to consider replacing at the same time are the radiator cap, coolant level sensor, lower radiator hose, coolant temp sensor, and the hose clamps. If your car has an automatic transmission you should also replace the oil cooler thermostat in the radiator frame, which is a common source for leaks.

As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Genuine MINI Engine Coolant Expansion Tank Cap - 17135A1BD89 ...

T#:28337931

Part#: 17135A1BD89

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26% off MSRP $ 34.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 25.99 USD

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26% off MSRP

$ 34.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 25.99 USD

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Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:362009

Part#: 17111741167

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$ 49.99 USD

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$ 49.99 USD

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Febi Coolant Expansion Tank - E82, E88, E90, E91, E92, E93, Z4 ...

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T#:340723

Part#: 17137607482

In Stock

$ 151.99

This product was last offered at the strikethrough price on
04-16-2026

$ 104.99 USD

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$ 104.99 USD

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Rein Coolant Expansion Tank - E46, E53, E83

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T#:402141

Part#: 17117573781

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$ 76.39 USD

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$ 76.39 USD

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Coolant Expansion Tank Cap

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T#:373591

Part#: 17117521071

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$ 14.49 USD

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$ 14.49 USD

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URO Coolant Expansion Tank - BMW E46 M3

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T#:48608189

Part#: 17112283344

Ships in 2 Business Days

$ 155.99 USD

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$ 155.99 USD

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This radiator coolant reservoir/expansion tank for E46 M3 is a common failure item as the plastic weakens and cracks, causing coolant leaks. If your E46 M3 has over 80k miles and still has the original expansion tank, we highly recommend replacing it during your next major service.

Genuine BMW Coolant Expansion Tank Hose - BMW F22/23 F3X B58 B46/48 ...

T#:537222

Part#: 17128620944

In Stock

6% off MSRP $ 68.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 63.99 USD

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6% off MSRP

$ 68.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 63.99 USD

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Coolant Expansion Tank - E60 M5,E63 M6

T#:22514

Part#: 17112283345

In Stock

5% off MSRP $ 215.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 205.99 USD

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5% off MSRP

$ 215.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 205.99 USD

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This high quality Genuine BMW expansion tank is used on the S85 V10 engines, and is a common failure item. Be leary of competitors selling this part for less -- is it a Genuine BMW? Probably not. We only carry the Genuine BMW 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. 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. While replacing the expansion tank we recommend replacing the level sensor (sold below) as these are also common failure items.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
2004-2010 E60 BMW M5
2004-2010 E63 BMW M6

Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:384250

Part#: 17137640514

In Stock

$ 60.74 USD

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$ 60.74 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.