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

Replacement coolant reservoir for the cooling system

Price: $146.67
162.52

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

Original BMW coolant reservoir for charge-air intercooler on G42 2-series, G20 3-series, G22/G23/G26 4-series, and G29 Z4 models.

Price: $142.86
159.44

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Coolant Expansion Tank - E34 530i 540i - E32 740i 740il 750il

Genuine BMW # 17111719110

Price: $140.29
147.67

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Expansion Tank for Intercooler Coolant, BMW - G30 G12 G14 G15 G16

Original BMW coolant reservoir for charge-air intercooler on 530i, 540i, 740i, and 840i models.

Price: $139.99
159.44

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Expansion Tank for Low Temp Radiator, BMW - U11 X1 & U10 X2

Original BMW small reservoir for B48R engine coolant on U11 X1 and U10 X2 M35i models.

Price: $139.90
159.44

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Expansion Tank for Intercooler, BMW - G30 G12 G15 G05 G06 G07 (N63R N63B)

Expansion Tank for Intercooler Coolant, BMW - G30 G12 G15 G05 G06 G07 (N63R N63B) - 17138610658

Price: $138.99
159.44

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Coolant Expansion Tank Overhaul Package, OEM - E46 Automatic

Resolve a leaking E46 expansion tank with one package using an OEM tank

Price: $138.99
347.88

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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: $138.87
161.86

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Intercooler Expansion Tank, BMW - F10 550i, F13 650i, F02 750i, X5/X6 50i

Original BMW replacement for your aged or damaged expansion tank. Direct replacement for BMW part #17137647281. N63A, N63TU.

Price: $136.05
151.84

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

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

Price: $135.24
142.36

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

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

Price: $134.09
141.15

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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 - F48 X1, F39 X2, F44 228i (2020+)

Original BMW coolant reservoir for B46D engine on 2020+ F48 X1, F39 X2, and F44 228i models.

Price: $122.99
141.72

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Coolant Expansion Tank, Genuine BMW - E30 325i 88+ & E36 M3 Euro

Replacement for your aged or damaged expansion tank

Price: $121.59
134.73

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

Original BMW replacement for your aged or damaged expansion tank.

Price: $120.81
127.17

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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: $120.73
139.17

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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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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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Coolant Expansion Tank, BMW - F39 X2 M35i, F44 M235i

Original BMW Expansion Tank for engine coolant on F39 X2 M35i and F44 M235i models.

Price: $117.61
123.80

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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: $117.61
123.80

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Expansion Tank Mounting Plate, Rein - E83 X3 Automatic

Expansion tank frame makes replacement a breeze!

Price: $115.99
221.52

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Expansion Tank Mounting Plate, BMW - E53 X5 Automatic

Expansion tank frame makes replacement a breeze!

Price: $115.86
128.37

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Expansion Tank Mounting Bracket - E46 - Manual Trans

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

Price: $115.07
127.50

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Coolant Expansion Tank Overhaul Package - E46 Manual

Resolve a leaking E46 expansion tank with one package

Price: $109.99
119.95

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Coolant Expansion Tank Kit, Rein - E70, F15, F85 X5M, E71, F16, F86 X6M

Replacement coolant reservoir kit identical to the original BMW part #17138621092

Price: $108.99
140.86

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Coolant Expansion Tank Kit, Rein - E82 135i, E9X 335i, E84 X1

Replacement coolant reservoir, cap, sensor identical to the original BMW part #17137640515

Price: $101.99
140.86

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

Original BMW coolant reservoir for E24 6-Series

Price: $101.25
112.19

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Expansion Tank Mounting Bracket - E46 E85 Z4 with Auto Trans

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

Price: $99.01
104.23

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Expansion Tank Kit, Rein - F10 535d/535i, F06/F12/F13 640i, F02 740i N55

Replacement coolant reservoir identical to the original BMW part #17137647283

Price: $98.99
140.86

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Coolant Expansion Tank Kit, Rein - E90 335d

Replacement coolant reservoir identical to the original BMW part #17138570079

Price: $97.99
140.86

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Expansion Tank Kit, Rein - F10 550i, F06/F12/F13 650i, F02 750i

Kit of reservoir, cap, and sensor replaces original BMW part #17137601948. N63A.

Price: $95.00
150.86

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

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

Price: $91.99
106.73

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Engine Coolant Expansion Tank, URO - G87 M2, G80 M3, G82 M4

Quality aftermarket expansion tank for S58 engine cooling on G8X M2, M3, and M4 models.

Price: $89.99

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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: $89.99
108.00

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Coolant Expansion Tank Kit, Rein - E53 X5 4.4/4.6is M62, Z3 non-M

Replacement coolant reservoir identical to the original BMW part #17107514964

Price: $87.99

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Expansion Tank Vent Hose, BMW - F22 M235iR/M240iR

Vent hose from expansion tank on Racing models.

Price: $86.99

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Coolant Shut-Off Valve for B48P/B48R Cylinder Head - G2X G60 U11 U10

Original BMW electronic valve controls coolant flow from the B48P/B48R engine cylinder head to the coolant expansion tank.

Price: $85.90
101.76

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Expansion Tank - 17138621092 - E70,E71,F15,F16, F85, F86 - Behr

OEM Expansion Tank With Level Sensor

Price: $81.99
140.86

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Expansion Tanks

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

Price: $147.06 154.80

Coolant Expansion Tank, BMW - G26 i4 e40/M50

Price: $146.67 162.52

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

Price: $142.86 159.44

Coolant Expansion Tank - E34 530i 540i - E32 740i 740il 750il

Price: $140.29 147.67

Expansion Tank for Intercooler Coolant, BMW - G30 G12 G14 G15 G16

Price: $139.99 159.44

Expansion Tank for Low Temp Radiator, BMW - U11 X1 & U10 X2

Price: $139.90 159.44

Expansion Tank for Intercooler, BMW - G30 G12 G15 G05 G06 G07 (N63R N63B)

Price: $138.99 159.44

Coolant Expansion Tank Overhaul Package, OEM - E46 Automatic

Price: $138.99 347.88

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

Price: $138.87 161.86

Intercooler Expansion Tank, BMW - F10 550i, F13 650i, F02 750i, X5/X6 50i

Price: $136.05 151.84

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

Price: $135.24 142.36

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

Price: $134.09 141.15

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

Price: $132.34 139.30

Coolant Expansion Tank, BMW - F48 X1, F39 X2, F44 228i (2020+)

Price: $122.99 141.72

Coolant Expansion Tank, Genuine BMW - E30 325i 88+ & E36 M3 Euro

Price: $121.59 134.73

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

Price: $120.81 127.17

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

Price: $120.73 139.17

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

Price: $119.74 132.67

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

Price: $117.99

Coolant Expansion Tank, BMW - F39 X2 M35i, F44 M235i

Price: $117.61 123.80

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

Price: $117.61 123.80

Expansion Tank Mounting Plate, Rein - E83 X3 Automatic

Price: $115.99 221.52

Expansion Tank Mounting Plate, BMW - E53 X5 Automatic

Price: $115.86 128.37

Expansion Tank Mounting Bracket - E46 - Manual Trans

Price: $115.07 127.50

Coolant Expansion Tank Overhaul Package - E46 Manual

Price: $109.99 119.95

Coolant Expansion Tank Kit, Rein - E70, F15, F85 X5M, E71, F16, F86 X6M

Price: $108.99 140.86

Coolant Expansion Tank Kit, Rein - E82 135i, E9X 335i, E84 X1

Price: $101.99 140.86

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

Price: $101.25 112.19

Expansion Tank Mounting Bracket - E46 E85 Z4 with Auto Trans

Price: $99.01 104.23

Expansion Tank Kit, Rein - F10 535d/535i, F06/F12/F13 640i, F02 740i N55

Price: $98.99 140.86

Coolant Expansion Tank Kit, Rein - E90 335d

Price: $97.99 140.86

Expansion Tank Kit, Rein - F10 550i, F06/F12/F13 650i, F02 750i

Price: $95.00 150.86

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

Price: $93.99 177.05

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

Price: $91.99 106.73

Engine Coolant Expansion Tank, URO - G87 M2, G80 M3, G82 M4

Price: $89.99

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

Price: $89.99 108.00

Coolant Expansion Tank Kit, Rein - E53 X5 4.4/4.6is M62, Z3 non-M

Price: $87.99

Expansion Tank Vent Hose, BMW - F22 M235iR/M240iR

Price: $86.99

Coolant Shut-Off Valve for B48P/B48R Cylinder Head - G2X G60 U11 U10

Price: $85.90 101.76

Expansion Tank - 17138621092 - E70,E71,F15,F16, F85, F86 - Behr

Price: $147.06
154.80

Price: $146.67
162.52

Price: $142.86
159.44

Price: $140.29
147.67

Price: $139.99
159.44

Price: $139.90
159.44

Price: $138.99
159.44

Price: $138.99
347.88

Price: $138.87
161.86

Price: $136.05
151.84

Price: $135.24
142.36

Price: $134.09
141.15

Price: $132.34
139.30

Price: $122.99
141.72

Price: $121.59
134.73

Price: $120.81
127.17

Price: $120.73
139.17

Price: $119.74
132.67

Price: $117.61
123.80

Price: $117.61
123.80

Price: $115.99
221.52

Price: $115.86
128.37

Price: $115.07
127.50

Price: $109.99
119.95

Price: $108.99
140.86

Price: $101.99
140.86

Price: $101.25
112.19

Price: $99.01
104.23

Price: $98.99
140.86

Price: $97.99
140.86

Price: $95.00
150.86

Price: $93.99
177.05

Price: $91.99
106.73

Price: $89.99
108.00

Price: $85.90
101.76

Price: $81.99
140.86