Home
Cooling
Expansion Tanks

BMW Coolant Expansion Tanks for BMW I01 i3 IB3

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.

Sort By:

Genuine BMW Engine Coolant Expansion Tank Cap - 17135A1BD89

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

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

Add to Wish List

Qty

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

Add to Wish List

Genuine BMW Cover Lid
This item fits the following BMW Chassis:
E70 X5M,E71 X6M,E70 X5,E71 X6,F01,F02,F06,F10,F12,F13,F15,F16,F30,F80 M3,F82 M4,F83,i3i12

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

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

T#:28337931

Part#: 17135A1BD89

Ships in 1 day

9% 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.

$ 31.99 USD

Add to Wish List

Qty

9% 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.

$ 31.99 USD

Add to Wish List

Coolant Expansion Tank

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:587608

Part#: 17137823626

In Stock

$ 47.99

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

$ 41.99 USD

Limited Qty Sale

Add to Wish List

Qty

$ 47.99

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

$ 41.99 USD

Limited Qty Sale

Add to Wish List

Coolant Expansion Tank - R56 MINI Cooper S

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

T#:46488

Part#: 17137823626

Back Ordered

$ 67.99 USD

Add to Wish List

Qty

$ 67.99 USD

Add to Wish List

This high-quality BEHR brand expansion tank is used on MINI Cooper R55 R56 and is a common failure item. BEHR was the original equipment supplier to BMW, so you know the BEHR made expansion tank will be the highest quality available. Be cautious 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 MINIs. 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 fewer 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.

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 MINIs:
2007+ R56 MINI MINI Cooper, MINI Cooper S
2007+ R55 MINI MINI Cooper Clubman, MINI Cooper S Clubman
2007+ R57 MINI MINI Cooper Convertible, MINI Cooper S Convertible,
2011+ R60 MINI MINI Cooper Countryman, MINI Cooper Countryman S

This item fits the following BMWs:
2015+ I01 BMW i3
2015+ I12 BMW i8

Show More Show Less

URO Engine Coolant Expansion Tank Cap - BMW I01 - IB3

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:373592

Part#: 17132754264

Ships in 1 Business Day

$ 8.19 USD

Add to Wish List

Qty

$ 8.19 USD

Add to Wish List

Replace the expansion tank cap for your MINI / BMW to restore the seal of your cooling system

Genuine BMW Expansion Tank - 17137604431 - i01 i3

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

T#:191374

Part#: 17137604431

Ships in 4 Business Days

6% off MSRP $ 162.99

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

$ 152.99 USD

Add to Wish List

Qty

6% off MSRP

$ 162.99

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

$ 152.99 USD

Add to Wish List

Genuine BMW Expansion Tank -

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.

Project Cars

SELECT YOUR BMW

BMW Coolant Expansion Tanks for BMW I01 i3 IB3

Genuine BMW Engine Coolant Expansion Tank Cap - 17135A1BD89

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

Coolant Expansion Tank

Coolant Expansion Tank - R56 MINI Cooper S

URO Engine Coolant Expansion Tank Cap - BMW I01 - IB3

Genuine BMW Expansion Tank - 17137604431 - i01 i3

Select Vehicle

Purpose

Category

Brand

Price

Shipping

Narrow Results