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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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Heater Pipe O-Ring - E46 323i/325i/328i/330i

Replacement o-ring for heater hoses and expansion tank

Price: $0.99

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Screw Plug for Coolant Expansion Tank - 17111707818 - E46,E53,E83,E85

Quality aftermarket drain plug for expansion tank on many E46, E83, E53, and E85/E86 models.

Price: $4.74

7.69
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Coolant Expansion Tank Kit, Rein - E82, E9X, E84 X1

Replacement coolant reservoir with cap and sensor is identical to the original BMW part #17137640514

Price: $77.99

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Coolant Expansion Tank, Aftermarket - F22 230i/M240i, F30 330i/340i, F32 430i/440i, B46, B58

Direct replacement for your aged or damaged expansion tank

Price: $62.99

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Coolant Expansion Tank, BMW - F22 230i/M240i, F30 330i/340i, F32 430i/440i, B46, B58

Genuine replacement for your aged or damaged expansion tank

Price: $147.06

154.80
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Charge Air Cooler Reservoir, BMW - F22 230i/M240i, F30 330i/340i, F32 430i/440i, B46, B58

Genuine replacement for your aged or damaged expansion tank

Price: $119.74

132.67
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Charge Air Cooler Expansion Tank, BMW - X3/X3M, X4/X4M, X5/X5M, X6/X6M, X7, XM

Coolant reservoir tank dedicated to the intake charge air cooler system

Price: $132.34

139.30
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Coolant Expansion Tank, BMW - G01 X3, F97 X3M, G02 X4, F98 X4M

Coolant reservoir tank for the main engine and turbo cooling system

Price: $147.06

154.80
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Coolant Tank Overflow Hose- S65 Engine - E90 E92 E93 M3

Original BMW coolant vent hose connects the expansion tank to the upper radiator hose.

Price: $49.69

53.61
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Coolant Expansion Tank, BMW - G26 i4 e40/M50

Replacement coolant reservoir for the cooling system

Price: $146.67

162.52
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Coolant Expansion Tank Cap, BMW - G26 i4 e40/M50

Replacement pressure-regulating cap for the cooling system

Price: $27.62

32.76
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Coolant Expansion Tank, OEM - F22 228i, F3X 328i/428i, N20, N26

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

Price: $79.99

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Expansion Tank - F80 M3, F82/F83 M4, F87 M2 Comp (S55) - 17132284600

The stock coolant overflow / expansion tank, Genuine BMW part number 17132284600 (17 13 2 284 600)

Price: $163.37

221.41
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Coolant Expansion Tank, Meyle - F48 X1, F39 X2, MINI F54/F56/F55/F60

Direct replacement for your aged or damaged expansion tank

Price: $53.99

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Charge Air Cooler Reservoir - F22 230i/M240i, F30 330i/340i, F32 430i/440i, B46, B58

Replacement for your aged or damaged expansion tank

Price: $78.99

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Charge Air Cooler Reservoir Cap - Many 2015+ Models

Keep optimum cooling performance - replace your cap every three years! Replacement for BMW part #17117639024

Price: $7.99

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Coolant Expansion Tank Kit, Aftermarket - F22 230i/M240i, F30 330i/340i, F32 430i/440i, B46, B58

Direct replacement tank, cap, sensor for your aged or damaged expansion tank

Price: $117.99

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OEM Coolant Expansion Tank - E85 E86 Z4 2.5i 3.0i 3.0si (M54 & N52)

Mahle-Behr OEM antifreeze coolant reservoir for Z4 coupe and roadster models (2003-2008).

Price: $63.96

143.93
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Genuine BMW Coolant Expansion Tank - E85 E86 Z4 2.5i 3.0i 3.0si

Original BMW antifreeze coolant reservoir for Z4 coupe and roadster models with the M54 or N52 engine (2003-2008).

Price: $156.99

162.86
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Threaded Cap for Coolant Level Sender Delete - E30 E36

Original BMW threaded cap is great for deleting the coolant level sensor on track cars.

Price: $7.47

7.86
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Coolant Expansion Tank Kit, Rein - G30 530i 540i G32 640i G12 740i

Quality aftermarket coolant reservoir for B48/B58-powered 5, 6, 7, and 8-series models.

Price: $93.99

177.05
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Charge Air Cooler Coolant Reservoir & Hoses, BMW - F8X M3/M4

Stock replacement small coolant tank with hoses. Genuine replacement for BMW part #17132284601.

Price: $279.99

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Coolant Expansion Tank, Moroso - E30 M3 (1988-1991)

Aluminum coolant reservoir directly replaces BMW part # 17112225543.

Price: $395.51

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Coolant Expansion Tank, Aftermarket - F22 M235i, F87 M2 N55, F3X 328d/335i/435i

High quality replacement for your aged or damaged expansion tank

Price: $79.99

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E36 Euro Expansion Tank Reservoir Relocation / Install Kit

Installation kit for using the E36 Euro coolant reservoir on your U.S.-spec E36 6 cylinder

Price: $427.99

444.76
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E36 Euro-Style Expansion Tank Reservoir Relocation Kit (with E30 Tank)

Complete installation kit with an E30 3-series coolant reservoir for use on your US-spec E36 6-cylinder model.

Price: $489.99

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Coolant Expansion Tank Cap, BMW - E82, F22, E9X, F3X, F10, F13, G30, F01, F02, F25, F26, G01, G02, E70, F15, G05, E71, F16, G06

Keep optimum cooling performance - replace your cap every three years! Original BMW part # 17117639020.

Price: $27.62

32.76
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BMW Expansion Tank - 34321112399 - E10

High quality, 24 Month Warranty

Price: $36.99

98.41
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Coolant Expansion Tank Cap, Rein - E9X M3, E60 E63 F01 E70 E71

Keep optimum cooling performance - replace your cap every three years! OEM-type replacement for BMW part #17117639021.

Price: $17.99

24.70
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Bracket for Coolant Expansion Tank, BMW - E85/E86 Z4 Manual

Original BMW mounting bracket attaches the coolant reservoir to the radiator.

Price: $76.44

90.45
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Bracket for Coolant Expansion Tank, URO - E85/E86 Z4 Manual

Quality aftermarket mounting bracket attaches the coolant reservoir to the radiator.

Price: $57.99

89.56
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Cap for Coolant Expansion Tank, BMW - G42 G20 G22 G26 G29

Original BMW cam for the main coolant reservoir on G42 2-series, G20 3-series, G22/G23/G26 4-series, and G29 Z4 models.

Price: $22.09

32.76
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Expansion Tank for Intercooler - F10 F90 F06 F12 F13 F91 F92 F93 F15

Original BMW coolant expansion tank for intercooler circuit on F10/F90 M5, F06/F12/F13 M6, F91/F92/F93 M8, and F15 X5 50i models.

Price: $172.44

189.78
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Coolant Vent Hose, BMW - G01/G02 30i & M40i (2018-2019)

Original BMW coolant overflow pipe connects the radiator to the expansion tank on all 2018-2019 X3 and X4 models.

Price: $42.49

47.76
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Genuine BMW Expansion Tank Bracket - E30 325i 88+, E36 M3 Euro, MZ3 Euro -

Double-post mounting bracket used with the late-style E30 expansion tank

Price: $6.83

7.19
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Genuine BMW Isolator Grommet / Bump Stop - 13717542860

Genuine BMW # 13717542860

Price: $5.91

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Coolant/Washer Level Sensor (installs in expansion tank) - Many BMW (see list)

High Quality Replacement to BMW # 17137553919

Price: $15.99

28.84
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    540.639.9648
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