BMW Coolant Expansion Tanks for BMW 6 Series F12 (2012+)

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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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OEM Rein Expansion Tank - F01,F06,F10,F12,F13
OEM Rein Expansion Tank - F01,F06,F10,F12,F13
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:555024
Part#: 17137647283
Ships in 1 Business Day
Sale - Save 5% $ 118.99

This product was last offered at the strikethrough price on
08-31-2026

$ 113.04 USD
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Sale - Save 5%
$ 118.99

This product was last offered at the strikethrough price on
08-31-2026

$ 113.04 USD
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Replace your damaged expansion tank to prevent coolant loss or potential overheating issues.

his item fits the following BMW Chassis:
F01,F02,F06,F10,F12,F13

Fits BMW Engines including:
N54,N55,N57N

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Expansion Tank
Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:593074
Part#: 17137601948
Back Ordered
Sale - Save 5% $ 118.99

This product was last offered at the strikethrough price on
08-31-2026

$ 113.04 USD
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Sale - Save 5%
$ 118.99

This product was last offered at the strikethrough price on
08-31-2026

$ 113.04 USD
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Cooling system expansion tank
BMW Expansion Tank With Cap - 17137601948
BMW Expansion Tank With Cap - 17137601948
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616024
Part#: EPK0141
In Stock
$ 97.99

This product was last offered at the strikethrough price on
06-01-2026

$ 87.99 USD
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$ 97.99

This product was last offered at the strikethrough price on
06-01-2026

$ 87.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Add to Wish List
The coolant expansion tank provides a reservoir for excess coolant as it expands and contracts with temperature fluctuations. Constant exposure to these extreme changes can eventually cause the tank to crack or fail.
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Intercooler Expansion Tank
Intercooler Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:584477
Part#: 17137647281
In Stock at Vendor
Sale - Save 5% $ 71.99

This product was last offered at the strikethrough price on
08-31-2026

$ 68.39 USD
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Sale - Save 5%
$ 71.99

This product was last offered at the strikethrough price on
08-31-2026

$ 68.39 USD
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Rein Expansion Tank Cap
Rein Expansion Tank Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:384807
Part#: 17117639021
In Stock
Sale - Save 5% $ 16.99

This product was last offered at the strikethrough price on
08-31-2026

$ 16.14 USD
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$ 16.99

This product was last offered at the strikethrough price on
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Cap for plastic expansion tank
2 Pin Connector
2 Pin Connector
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:33412932
Part#: 61132359999
In Stock
Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
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Sale - Save 25%
$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD
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Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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BMW Expansion Tank Kit - 17137647283
BMW Expansion Tank Kit - 17137647283
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616005
Part#: EPK0151
Ships in 3 Business Days
Sale - Save 6% $ 100.99

This product was last offered at the strikethrough price on
08-31-2026

$ 95.28 USD
Free Shipping on orders $49 and up
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Sale - Save 6%
$ 100.99

This product was last offered at the strikethrough price on
08-31-2026

$ 95.28 USD
Free Shipping on orders $49 and up
Add to Wish List
Replace your damaged expansion tank to prevent coolant loss or potential overheating issues. his item fits the following BMW Chassis: F01,F02,F06,F10,F12,F13 Fits BMW Engines including: N54,N55,N57N
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