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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.

Want to learn more about your BMW's cooling system? Check out our BMW cooling system tech page by clicking here.

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 - E30 325e 325i & E28 528e (1982-1988)

Replacement for your aged or damaged expansion tank

Price: $97.99

120.48
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Coolant Expansion Tank - E32 735i & 735iL

Replacement for your aged or damaged expansion tank

Price: $92.99

110.73
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Coolant Expansion Tank, BMW - E30 325i 88+, E36 M3 Euro, MZ3 Euro

Replacement for your aged or damaged expansion tank

Price: $106.00

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Coolant Expansion Tank - E30 / E36 / Z3 4 cylinder, E34 525i - 17111712835

Replacement for your aged or damaged expansion tank

Price: $23.99

101.47
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Coolant Expansion Tank, Febi - E36, E39, Z3 (17111723520)

Replacement for your aged or damaged expansion tank

Price: $29.99

101.47
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Coolant Expansion Tank - OEM - E31 E38 E39 V8 & V12 - 17111741167

OE Replacement for your aged or damaged expansion tank

Price: $48.99

140.00
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Coolant Expansion Tank Cap - E36, E46, E34, E39, E38, X3, X5, Z3, Z4

Keep optimum cooling performance - replace your cap every three years! Aftermarket replacement for BMW part #17117639022.

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

143.78
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Coolant Expansion Tank - E46 (non-M) X3 X5 3.0 - 17117573781

OEM Replacement For Your Aged Or Damaged Expansion Tank

Price: $46.99

127.36
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E46 M3 Aluminum Expansion Tank by Moroso

Prevent catastrophe 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 - URO

Aftermarket Expansion Tank With Level Sensor

Price: $44.99

140.86
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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 - URO - 17111741167

Aftermarket Replacement to BMW # 17111741167 with a 24 Month Warranty

Price: $32.99

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Expansion Tank - 17111712835 - E36 / Z3 4-Cylinder and E34 525i

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 - E85 E86 Z4 Non-M

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

Price: $57.22

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Expansion Tank Retaining Plate - E53 X5 3.0i Automatic (2001-2006)

Expansion tank frame for automatic transmission models. Replaces BMW part #17111438819

Price: $44.99

76.93
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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, Rein - E39 525i 528i 530i 1999-2003

Replacement coolant reservoir identical to the original BMW part #17111436381

Price: $44.99

112.72
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Coolant Expansion Tank - E46 M3

Genuine BMW # 17112283344

Price: $133.76

175.72
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Expansion Tank, BMW - E53 X5 4.4/4.8is N62

Replacement coolant reservoir identical to the original BMW part #17137501959

Price: $127.80

146.44
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Coolant Expansion Tank - OEM - E60/E61 5 Series, E63/E64 6 Series

OEM Replacement Coolant Expansion Tank For Most E60, E61 5-Series and E63/E64 6-Series

Price: $59.99

146.44
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Coolant Expansion Tank, BMW - E82 128i/135i, E9X 325i/328i/330i/335i, E89 Z4

Factory replacement coolant tank for original cooling performance

Price: $118.19

146.44
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Radiator Cap 1.4 Bar - 17 11 1 742 232

Febi-Bilstein Radiator Cap 1.4 Bar - 17 11 1 742 232

Price: $12.99

27.29
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Expansion Tank Mounting Bracket - E46 - Manual Trans

Expansion tank frame for manual transmission models. Replaces BMW part #17111436250.

Price: $59.99

76.93
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Genuine BMW Coolant Expansion Tank Reservoir - E9X M3 (S65)

Stock replacement coolant tank for original cooling performance

Price: $141.95

175.72
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Coolant Expansion Tank - E39 M5 (2000-2003)

Original BMW plastic antifreeze reservior with level sensor

Price: $147.80

184.75
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Coolant Expansion Tank, Rein - E46 (non-M), X3, X5 3.0 (17117573781)

OEM tank replaces BMW part #17117573781

Price: $48.99

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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Coolant Expansion Tank, Behr - E36, E39, Z3 (17111723520)

OEM replacement for your aged or damaged expansion tank

Price: $38.99

49.68
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Transmission Thermostat (Mounted in Expansion Tank) for E46 X3 X5 Z4

High Quality Replacement to BMW # 17111437362

Price: $49.99

95.24
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Expansion Tank Mounting Bracket - E46 E85 Z4 - Auto Trans

Expansion tank frame for automatic transmission models. Replaces BMW part #17111436251.

Price: $55.19

76.93
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