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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: $32.99

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Expansion Tank - 17111712835

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

Price: $27.92

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Expansion Tank - 17107514964

Aftermarket Replacement # 17 10 7 514 964, 24 Month Warranty

Price: $49.37

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Expansion Tank - 17111712196

Aftermarket Replacement # 17 11 1 712 196, 24 Month Warranty

Price: $33.22

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Expansion Tank - 17117573751

Aftermarket Replacement # 17 11 7 573 751, 24 Month Warranty

Price: $57.22

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Expansion Tank Retaining Plate - 17111438819

Aftermarket Replacement # 17 11 1 438 819, 24 Month Warranty

Price: $34.00

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Expansion Tank Retaining Plate - E46 / Z4 - 17111436251

Aftermarket Replacement # 17 11 1 436 251, 24 Month Warranty

Price: $38.99

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Coolant Expansion Tank - E39 525i 528i 530i 1999-2003

High Quality Replacement to BMW # 17111436381

Price: $48.40

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Coolant Expansion Tank - E46 M3

Genuine BMW # 17112283344

Price: $133.76

150.94
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Coolant Expansion Tank - E53 X5 4.4i 4.8is 2004-2006 (Behr OEM)

High Quality Replacement to BMW # 17137501959

Price: $58.10

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Coolant Expansion Tank - OEM - E60/E61 5 Series, E63/E64 6 Series

High Quality Replacement to BMW # 17137542986

Price: $48.40

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Coolant Expansion Tank - E9X E82 E84 E89 Z4

Genuine BMW # 17137640514

Price: $111.45

125.80
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Radiator Cap 1.4 Bar - 17 11 1 742 232

Radiator Cap 1.4 Bar - 17 11 1 742 232

Price: $12.99

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Expansion Tank Mounting Bracket - E46 - Manual Trans

Genuine BMW # 17111436250

Price: $59.99

65.43
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Coolant Expansion Tank Reservoir (Genuine BMW) - E9X M3

Coolant Expansion Tank Reservoir - E9X M3 (17112283500)

Price: $141.95

157.14
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Coolant Expansion Tank Cap - E9X M3, E60 E63 F01 E70 E71 - 17117639021

Keep optimum cooling performance - replace your cap every three years!

Price: $16.71

21.36
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Expansion Tank - E39 M5

Genuine BMW # 17112229114

Price: $133.76

150.94
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Coolant Expansion Tank, Complete - E46 (non-M), X3, X5 3.0 (17117573781)

Complete tank with cap and level sensor

Price: $59.99

88.03
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Coolant Expansion Tank Overhaul Package - E46 Manual

Resolve a leaking E46 expansion tank with one package

Price: $107.99

119.67
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Coolant Expansion Tank Overhaul Package - E46 Automatic

Resolve a leaking E46 expansion tank with one package

Price: $168.99

187.33
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E46 323i/325i/328i/330i 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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