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BMW Coolant Expansion Tanks

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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Expansion Tank - F90, F91, F92, F93

T#:10225927

Part#: 17137889450

In Stock

Sale - Save 3% $ 226.99

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

$ 220.50 USD

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Sale - Save 3%

$ 226.99

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

$ 220.50 USD

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Coolant Expansion Tank - E70 X5, E71 X6

T#:217490

Part#: 17138621092

In Stock

Sale - Save 8% $ 222.99

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

$ 205.91 USD

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Sale - Save 8%

$ 222.99

This product was last offered at the strikethrough price on
08-26-2026

$ 205.91 USD

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Genuine BMW Expansion Tank -

This item fits the following BMW Chassis:
E70,E71,F15,F16,

This item fits the following BMW Engines:
N63,N63N,S63,N62N

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Coolant Expansion Tank - E30 M3 1988-1991

T#:12562

Part#: 17112225543

Ships in 2 Business Days

Sale - Save 8% $ 205.99

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

$ 190.16 USD

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Qty

Sale - Save 8%

$ 205.99

This product was last offered at the strikethrough price on
08-26-2026

$ 190.16 USD

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This Genuine BMW cooling system expansion tank / coolant reservoir is a direct replacement for the factory unit. Replace your cracked or leaking radiator expansion tank today and save your valuable S14 engine for damage.

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:
1988-1991 E30 BMW M3

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Genuine BMW Radiator Mounting Plate for Expansion Tank - Z4

T#:45825

Part#: 17112248408

In Stock

Sale - Save 8% $ 95.99

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

$ 87.93 USD

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Qty

Sale - Save 8%

$ 95.99

This product was last offered at the strikethrough price on
08-26-2026

$ 87.93 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

T#:12560

Part#: 17111436251

In Stock

Sale - Save 51% $ 205.99

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

$ 101.32 USD

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Qty

Sale - Save 51%

$ 205.99

This product was last offered at the strikethrough price on
05-07-2026

$ 101.32 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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BMW Coolant Expansion Tanks

Expansion Tank - F90, F91, F92, F93

Coolant Expansion Tank - E70 X5, E71 X6

Coolant Expansion Tank - E30 M3 1988-1991

Genuine BMW Radiator Mounting Plate for Expansion Tank - Z4

Expansion Tank Mounting Bracket - E46 E85 Z4 - Auto Trans

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