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Expansion Tanks

A BMW expansion tank ensures that your radiator is always full, even when cold, and provides a way for hot fluid to expand without releasing fluid on the road below you. Factory BMW tanks are made of plastic, and will eventually crack, leak and fail. BMW expansion tanks should be inspected during routine maintenance. We recommend replacing the expansion tank as a preventatively whenever you replace the radiator and coolant hoses. We also offer high-quality aluminum replacement tanks for some BMWs. Use our SEARCH BY MODEL feature to filter these items for your BMW.

Need help finding Expansion Tanks for your BMW? Call us at 877.639.9648, email us, or live chat for expert assistance.

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Coolant Expansion Tank - 17 11 1 707 540

Replacement for your aged or damaged expansion tank

Price: $97.99

105.59
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Coolant Expansion Tank - 17 11 1 712 196

Replacement for your aged or damaged expansion tank

Price: $44.99

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Coolant Expansion Tank - 17 11 1 712 641

Replacement for your aged or damaged expansion tank

Price: $99.99

105.59
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Coolant Expansion Tank - 17 11 1 712 835

Replacement for your aged or damaged expansion tank

Price: $23.99

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Coolant Expansion Tank - 17 11 1 723 520

Replacement for your aged or damaged expansion tank

Price: $49.99

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Coolant Expansion Tank - 17 11 1 741 167

Replacement for your aged or damaged expansion tank

Price: $49.99

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Expansion Tank Cap (2.0 Bar) - 17 11 1 742 231

Radiator expansion tank cap for numerous applications - standard 2.0 bar

Price: $6.99

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Genuine BMW Coolant Expansion Tank for E30 M3 '88-'91 - 17112225543

Replacement for your aged or damaged expansion tank

Price: $114.99

126.02
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Coolant Expansion Tank - E46 (non-M) X3 X5 3.0 - 17117573781

Replacement for your aged or damaged expansion tank

Price: $46.99

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E46 M3 Aluminum Expansion Tank by Moroso

Prevent catastrophy by replacing your aged, fragile plastic tank with a high-quality, long-lasting aluminum tank

Price: $299.99

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Coolant Expansion Tank - 17 13 7 552 546

Replacement for your aged or damaged expansion tank

Price: $42.99

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Coolant Expansion Tank - 17 10 7 509 071

Replacement for your aged or damaged expansion tank

Price: $27.99

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E36 Aluminum Expansion Tank by Moroso

Factory-style replacement aluminum coolant expansion tank for all 6-cylinder E36 models

Price: $299.99

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Expansion Tank Cap - 17137516004

Aftermarket Replacement # 17 13 7 516 004, 24 Month Warranty

Price: $6.99

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Expansion Tank Cap - 17132754264

Aftermarket Replacement # 17 13 2 754 264, 24 Month Warranty

Price: $6.37

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Expansion Tank Cap - 17117521071

Aftermarket Replacement # 17 11 7 521 071, 24 Month Warranty

Price: $9.11

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Expansion Tank Cap - 17111468077

Aftermarket Replacement # 17 11 1 468 077, 24 Month Warranty

Price: $3.34

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Expansion Tank Cap - 17114379047

Aftermarket Replacement # 17 11 4 379 047, 24 Month Warranty

Price: $4.09

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Expansion Tank - 17111741167

Aftermarket Replacement # 17 11 1 741 167, 24 Month Warranty

Price: $38.08

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Expansion Tank - 17111712835

Aftermarket Replacement # 17 11 1 712 835, 24 Month Warranty

Price: $27.92

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