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

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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Genuine BMW Expansion Tank Cap - E3X / E53 / Z4

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

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

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

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

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

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

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

T#:45825

Part#: 17112248408

Ships in 4 Business Days

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

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

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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Genuine BMW Expansion Tank Thermostat - Z4

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

T#:45828

Part#: 17112249366

Ships in 4 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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Qty

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

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Genuine BMW 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

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

Genuine BMW Expansion Tank Thermostat - Z4

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