BMW Coolant Expansion Tanks for BMW Z Series E85/6 (2003-2008)

Genuine BMW Expansion Tank Cap - E3X / E53 / Z4

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T#:207187

Part#: 17117639022

In Stock

21% 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.

$ 27.67 USD

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21% 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.

$ 27.67 USD

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Genuine BMW Radiator Cap - 2,0Bar
This item fits the following BMW Chassis:
E36 M3,E39 M5,E46 M3,E85 Z4M,E53 48IS,E36,E38,E39,E46,E53 X5,E65,E83 X3,E85 Z4,E86 Z4,F06,F10,F12,F13

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Coolant Expansion Tank - E85 E86 Z4

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T#:7457

Part#: 17117573751

In Stock at Vendor

$ 289.99

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

$ 281.99 USD

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$ 281.99 USD

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This high quality Genuine BMW brand expansion tank is used on M54 and N52 engines, and is a common failure item on all E85 Z4's. Be leary of competitors selling this part for less -- is it a Genuine BMW? Probably not.

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.

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:
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si

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Coolant Expansion Tank

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T#:363421

Part#: 17117573751

Ships in 1 Business Day

$ 64.99 USD

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$ 64.99 USD

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Does not include cap or coolant level sensor

Rein Expansion Tank Mounting Plate - E46, Z4

For vehicles with automatic transmission only

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T#:402139

Part#: 17111436251

Ships in 1 Business Day

$ 80.99 USD

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$ 80.99 USD

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Mounts to the side of the radiator for retaining the expansion tank

Genuine BMW Expansion Tank - E85 Z4 M Coupe/Roadster S54

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T#:22487

Part#: 17107836448

Back Ordered

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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Genuine BMW Expansion Tank
This item fits the following BMW Chassis:
E85 Z4M,E85 Z4,E86 Z4

Fits BMW Engines including:
S54

Genuine BMW Radiator Mounting Plate for Expansion Tank - Z4

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T#:45825

Part#: 17112248408

Ships in 1 day

Sale - Save 6% $ 94.99

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

$ 89.54 USD

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Sale - Save 6%

$ 94.99

This product was last offered at the strikethrough price on
06-25-2026

$ 89.54 USD

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Genuine BMW Mounting Plate -
This item fits the following BMW Chassis:
E85,E86

Fits BMW Engines including:
M54,N52

Expansion Tank Mounting Bracket - E46 E85 Z4 - Auto Trans

For vehicles with automatic transmission only

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T#:12560

Part#: 17111436251

In Stock at Vendor

$ 205.99

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

$ 199.99 USD

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$ 199.99 USD

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This Genuine BMW part is the mounting bracket from the radiator to the expansion tank on E46 3 series and E85/E86 Z4 with Automatic Transmission.

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:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si

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Expansion Tank Retaining Plate

For vehicles with automatic transmission only

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T#:362912

Part#: 17111436251

Back Ordered

$ 53.99 USD

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$ 53.99 USD

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Mounts to the side of the radiator for retaining the expansion tank

Genuine BMW Expansion Tank Thermostat - Z4

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T#:45828

Part#: 17112249366

Ships in 3 Business Days

4% off MSRP $ 134.99

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

$ 130.00 USD

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4% off MSRP

$ 134.99

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

$ 130.00 USD

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Genuine BMW Thermostat -
This item fits the following BMW Chassis:
E85

Fits BMW Engines including:
M54

Bremmen Parts Water Pipe Connector - E83, Z4

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T#:1195932

Part#: 17112248409

Ships on Jul 23, 2026

Sale - Save 3% $ 31.61

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

$ 30.66 USD

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Sale - Save 3%

$ 31.61

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

$ 30.66 USD

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Located underneath the expansion tank

OEM Behr Coolant Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 ...

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T#:2766

Part#: 17111742231

In Stock

$ 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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OEM Rein Expansion Tank Cap - BMW E32 E34 E36 E38 E39 E46 & More ...

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T#:340541

Part#: 17111742231

In Stock

$ 17.99 USD

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$ 17.99 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.

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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:640140

Part#: 17111712788

In Stock

Sale - Save 39% $ 3.99

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

$ 2.44 USD

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Sale - Save 39%

$ 3.99

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

$ 2.44 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.

Meyle Expansion Tank Cap

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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

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Qty

Sale - Save 40%

$ 14.99

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

$ 8.99 USD

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Replace worn or missing pieces.

Expansion Tank Mounting Clamp

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T#:591954

Part#: 17111707777

Ships in 1 Business Day

$ 6.99 USD

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$ 6.99 USD

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Locks the expansion tank into the mounting plate via the large hole in the bottom of the tank

URO Radiator Mounting Plate for Expansion Tank - Z4

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T#:639486

Part#: 17112248408

Back Ordered

$ 69.99 USD

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$ 69.99 USD

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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts. 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! URO Mounting Plate - This item fits the following BMW Chassis: E85,E86 Fits BMW Engines including: M54,N52

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Fluid Level Sensor

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T#:5973204

Part#: 17117546548

Special Order: No Guaranteed ETA

$ 13.99 USD

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$ 13.99 USD

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MEYLE-ORIGINAL: True to OE fluid level sensor. Used in multiple locations. 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. Comparable OE Cross Reference - 17117546548

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BMW Coolant Expansion Tanks for BMW Z Series E85/6 (2003-2008)

Genuine BMW Expansion Tank Cap - E3X / E53 / Z4

Coolant Expansion Tank - E85 E86 Z4

Coolant Expansion Tank

Rein Expansion Tank Mounting Plate - E46, Z4

Genuine BMW Expansion Tank - E85 Z4 M Coupe/Roadster S54

Genuine BMW Radiator Mounting Plate for Expansion Tank - Z4

Expansion Tank Mounting Bracket - E46 E85 Z4 - Auto Trans

Expansion Tank Retaining Plate

Genuine BMW Expansion Tank Thermostat - Z4

Bremmen Parts Water Pipe Connector - E83, Z4

OEM Behr Coolant Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 ...

OEM Rein Expansion Tank Cap - BMW E32 E34 E36 E38 E39 E46 & More ...

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

Meyle Expansion Tank Cap

Expansion Tank Mounting Clamp

URO Radiator Mounting Plate for Expansion Tank - Z4

Fluid Level Sensor

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