BMW Coolant Expansion Tanks for BMW X Series E70 (2007-2013)

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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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Bav Auto Coolant Expansion Tank - With Level Sensor - E70 X5, E71 X6
Bav Auto Coolant Expansion Tank - With Level Sensor - E70 X5, E71 X6 ...
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Bavarian Autosport - Corporate Logo
T#:638093
Part#: 17138621092
In Stock
Sale - Save 20% $ 60.99

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

$ 48.79 USD
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Sale - Save 20%
$ 60.99

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

$ 48.79 USD
Free Shipping on orders $49 and up
Add to Wish List
Replace your old expansion tank to prevent potential failure or leaks. Includes a brand new coolant level sensor.
MMX 90mm Billet Coolant Expansion Tank Cap | BMW
MMX 90mm Billet Coolant Expansion Tank Cap | BMW
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MMX Performance - Corporate Logo
T#:29002094
Part#: MMR03-1502
Ships in 1 Business Day
$ 127.99 USD
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$ 127.99 USD
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The MMX Performance 90mm billet coolant expansion cap for BMWs has been designed from the ground up in the UK, from a solid piece of billet aluminum. Each cap was designed to directly replace the OE cap, not merely stuck in place. Fitment is for models with the matching OE (17 11 7 639 021) part number.
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URO Coolant Expansion Tank - E70
URO Coolant Expansion Tank - E70
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URO - Corporate Logo
T#:592016
Part#: 17137552546
Ships in 1 Business Day
$ 70.99 USD
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$ 70.99 USD
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Replace your cracked or faded tank
URO Intercooler Expansion Tank - BMW N63 N74
URO Intercooler Expansion Tank - BMW N63 N74
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:593075
Part#: 17137647281
Back Ordered
$ 59.99 USD
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$ 59.99 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.
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Coolant Expansion Tank Cap
Coolant Expansion Tank Cap
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:373591
Part#: 17117521071
In Stock
$ 18.99

This product was last offered at the strikethrough price on
03-09-2026

$ 14.49 USD
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$ 14.49 USD
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Keep that coolant expansion tank sealed
Expansion Tank Cap
Expansion Tank Cap
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:373099
Part#: 17137516004
Ships in 1 Business Day
$ 15.99

This product was last offered at the strikethrough price on
04-10-2026

$ 10.99 USD
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$ 10.99 USD
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The coolant expansion tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap.
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