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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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Brass Radiator Bleeder Screw - Most BMWs

Never break your BMW bleeder screw again!

Price: $5.99

6.27
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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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Coolant Expansion Tank - E12 528i & 530i (1977-1981)

Genuine BMW Part Number 17111114743 / 17-11-1-114-743

Price: $99.79

114.28
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Coolant Expansion Tank - E24 633CSi 635CSi (1983-1989)

Original BMW coolant reservoir for E24 6-Series

Price: $91.31

106.29
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Coolant Expansion Tank - E28 533i 535i (1983-1988)

Original BMW Coolant Reservoir For E28 5-Series withe M30 engine

Price: $119.74

133.72
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Coolant Expansion Tank - E28 M5, 524td

Genuine BMW Part Number 17112225352 / 17-11-2-225-352

Price: $149.99

178.70
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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 - 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 - E34 530i 540i - E32 740i 740il 750il

Genuine BMW # 17111719110

Price: $112.99

139.89
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Coolant Expansion Tank - E34 M5

Genuine BMW # 17112227091

Price: $132.58

160.33
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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 - 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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Coolant Expansion Tank - E46 M3

Genuine BMW # 17112283344

Price: $133.76

175.72
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Coolant Expansion Tank - E60 M5,E63 M6

Genuine BMW # 17112283345

Price: $141.60

175.72
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Coolant Expansion Tank - F10 528i 528ix N20 4-Cylinder (2012-2016)

Original BMW coolant reservoir for F10 528i sedan with the 4-cylinder N20 engine.

Price: $127.81

146.44
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Coolant Expansion Tank - Genuine BMW - N20 N26 Engines

Genuine BMW Part # 17137642158 (17-13-7-642-158)

Price: $124.99

146.44
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Coolant Expansion Tank - Genuine BMW - N20 N26 Engines

Aftermarket Replacement for BMW Part # 17137642158 (17-13-7-642-158)

Price: $64.99

140.86
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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 - 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 - OEM - E60/E61 5 Series, E63/E64 6 Series

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

Price: $123.01

146.44
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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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Coolant Expansion Tank Cap, OEM - E36, E46, E34, E39, E38, X3, X5, Z3, Z4

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

Price: $9.99

21.36
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Coolant Expansion Tank Cap, Rein - E90 E92 F30 F32 F10 F12 F06, Rein - 17117639020

High quality replacement coolant cap with a 24 Month Warranty

Price: $16.71

18.97
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Coolant Expansion Tank Kit, Rein - E65/E66 745i/750i/760Li

Kit with coolant reservoir, cap, and level sensor. OEM-type replacements for BMW part #17137647713

Price: $65.99

163.88
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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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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, Behr - E30 325i 88+, E36 M3 Euro, MZ3 Euro

Replacement for your aged or damaged expansion tank

Price: $37.99

123.38
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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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Coolant Expansion Tank, Behr - E82 128i/135i, E9X 325i/328i/330i/335i, E89 Z4

Stock replacement coolant tank for original cooling performance

Price: $66.38

134.89
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Coolant Expansion Tank, Behr OEM - F10 528i 528ix N20 4-Cylinder (2012-2016)

OEM coolant reservoir for F10 528i sedan with the 4-cylinder N20 engine.

Price: $69.86

146.44
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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, 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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Coolant Expansion Tank, BMW - G30 530i/540i G32 640i G12 740i

Original BMW coolant reservoir for B48/B58-powered 5, 6, and 7-series models.

Price: $107.44

127.36
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Coolant Expansion Tank, Complete, Rein - E46 (non-M), X3, X5 3.0 (17117573781)

Complete tank with cap and level sensor

Price: $56.99

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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, Genuine BMW - F39 X2 M35i

Original BMW Expansion Tank for engine coolant on 2018+ X2 M35i.

Price: $109.88

127.36
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Coolant Expansion Tank, Genuine BMW - F48 X1 F39 X2 28i

Original BMW Expansion Tank for engine coolant on 4-cylinder X1 and X2 models.

Price: $88.91

101.88
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Coolant Expansion Tank, Mahle Behr - F48 X1 F39 X2 28i

OEM Behr Expansion Tank for engine coolant on 4-cylinder X1 and X2 models.

Price: $77.63

101.88
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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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