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Rein BMW Coolant Expansion Tanks for BMW F98 X4 M S58 3.0L

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 Coolant Expansion Tank - F97 F98 G01 G02 B46 B58 S58 ...

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T#:39059266

Part#: 17135A6A030

In Stock

Sale - Save 5% $ 86.99

This product was last offered at the strikethrough price on
06-29-2026

$ 82.64 USD

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Sale - Save 5%

$ 86.99

This product was last offered at the strikethrough price on
06-29-2026

$ 82.64 USD

Add to Wish List

Coolant expansion tanks can crack over time, especially during services where they need to be removed. Replace your tank with a brand new tank to ensure your cooling system remains leak-free.