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.

Coolant Expansion Tank, Rein - E36, E39, Z3, MZ3, M50, M52, S52

Replacement coolant reservoir identical to the original BMW part #17111723520

Price: $34.99

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Expansion Tank Retaining Plate - E46 / Z4 - 17111436251

Aftermarket Replacement # 17111436251 with a 24 Month Warranty

Price: $38.90
50.69

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Coolant Expansion Tank, Behr - E36, E39, Z3, MZ3, M50, M52, S52

OEM replacement for your aged or damaged expansion tank

Price: $40.99
49.68

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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: $40.99
123.38

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Intercooler Vent Hose, Bank 1, BMW - F10 550i, F13 650i, F02 750i

Hose from intercooler on Bank 1 to reservoir. Genuine replacement for BMW part #17127589442. N63A, N63TU.

Price: $43.23
45.50

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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 - 17107514964

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

Price: $46.90
64.18

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Coolant Expansion Tank - 17 13 7 552 546 - URO

Aftermarket Expansion Tank With Level Sensor

Price: $47.49
140.86

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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: $47.55
50.05

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Auto Transmission Cooler Thermostat, Behr - E46, E83 X3, E53 X5, E85/E86 Z4

OEM thermostat to regulate transmission cooler. Replaces BMW part #17111437362.

Price: $49.99
95.24

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Coolant Expansion Tank, Behr - E46, E83 X3, E53 X5 3.0

OEM replacement for your aged or damaged coolant reservoir

Price: $50.99
127.36

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Intercooler Reservoir Hose, Bank 1, BMW - F10 550i, F13 650i, F02 750i

Hose from reservoir to intercooler on Bank 1. Genuine replacement for BMW part #17127575432. N63A, N63TU.

Price: $51.08
53.77

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Intercooler Reservoir Hose, Bank 2, BMW - F10 550i, F13 650i, F02 750i (N63)

Hose from intercooler to reservoir on Bank 2. Genuine replacement for BMW part #17127584405. N63A.

Price: $51.08
53.77

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Febi-Bilstein Coolant Expansion Tank - E85 E86 Z4 2.5i 3.0i 3.0si

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

Price: $51.49
143.93

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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: $51.99
112.72

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

Replacement coolant reservoir identical to the original BMW part #17137501959

Price: $52.99
137.48

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Expansion Tank, OEM - F10 535d, F02 730LdX

Stock replacement coolant tank for original cooling performance

Price: $54.99
141.44

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Expansion Tank Mounting Bracket, Rein - E46 323i/325i/328i/330i Manual Trans

Expansion tank frame makes replacement a breeze!

Price: $54.99
80.53

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

Replacement coolant reservoir identical to the original BMW part #17137647713

Price: $57.99
146.44

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Coolant Expansion Tank Kit, Rein - X3/X4 28i, 35i M40i

Replacement coolant reservoir identical to the original BMW part #17138616418

Price: $57.99
140.86

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

OE Replacement for your aged or damaged expansion tank

Price: $64.79
140.00

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

OEM tank replaces BMW part #17117573781

Price: $64.99
104.81

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Coolant Expansion Tank Kit, Rein - E46, E83 X3, E53 X5 3.0

Replacement kit with accessories for your aged or damaged coolant reservoir

Price: $64.99
76.97

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Coolant Expansion Tank - F48 X1, F39 X2 28i, MINI F56/F60

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

Price: $65.99
101.88

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

Replacement coolant reservoir identical to the original BMW part #17107514964

Price: $65.99
140.86

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

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

Price: $66.39
127.36

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

Replacement coolant reservoir identical to the original BMW part #17137640514

Price: $66.99
140.86

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Expansion Tank Kit, Rein - E39 540i, E38 740i/iL/750iL, E31 840i/850i

Kit includes reservoir, cap, and sensor. OEM-type replacement for BMW part #17111741167

Price: $66.99
133.94

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Expansion Tank Mounting Bracket, Rein - E46 323i/325i/328i/330i Auto

Expansion tank frame makes replacement a breeze!

Price: $67.99

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

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

Price: $68.49
110.23

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Expansion Tank Vent Hose - E60 550i, E63 650i

Genuine BMW # 17127534917

Price: $69.03
72.66

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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: $69.99
108.00

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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: $69.99

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Expansion Tank Kit, Rein - E60, E63

Replacement coolant reservoir kit identical to the original BMW part #17137542986

Price: $69.99

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Expansion Tank Kit, Rein - E39 525i/528i/530i

Kit with coolant reservoir, cap, and level sensor. OEM-type replacements for BMW part #17111436381.

Price: $69.99
142.30

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Expansion Tank Kit, Rein - E53 X5 4.4/4.8is N62

Replacement coolant reservoir kit identical to the original BMW part #17137501959 with additional parts

Price: $70.99
97.00

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Expansion Tank, Behr - F10 550i, F13 650i, F02 750i

OEM replacement for your aged or damaged expansion tank. Direct replacement for BMW part #17137601948. N63A.

Price: $72.99
140.86

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Expansion Tanks

Coolant Expansion Tank, Rein - E36, E39, Z3, MZ3, M50, M52, S52

Price: $34.99

Expansion Tank Retaining Plate - E46 / Z4 - 17111436251

Price: $38.90 50.69

Coolant Expansion Tank, Behr - E36, E39, Z3, MZ3, M50, M52, S52

Price: $40.99 49.68

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

Price: $40.99 123.38

Intercooler Vent Hose, Bank 1, BMW - F10 550i, F13 650i, F02 750i

Price: $43.23 45.50

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

Price: $44.99 76.93

Expansion Tank - 17107514964

Price: $46.90 64.18

Coolant Expansion Tank - 17 13 7 552 546 - URO

Price: $47.49 140.86

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

Price: $47.55 50.05

Auto Transmission Cooler Thermostat, Behr - E46, E83 X3, E53 X5, E85/E86 Z4

Price: $49.99 95.24

Coolant Expansion Tank, Behr - E46, E83 X3, E53 X5 3.0

Price: $50.99 127.36

Intercooler Reservoir Hose, Bank 1, BMW - F10 550i, F13 650i, F02 750i

Price: $51.08 53.77

Intercooler Reservoir Hose, Bank 2, BMW - F10 550i, F13 650i, F02 750i (N63)

Price: $51.08 53.77

Febi-Bilstein Coolant Expansion Tank - E85 E86 Z4 2.5i 3.0i 3.0si

Price: $51.49 143.93

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

Price: $51.99 112.72

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

Price: $52.99 137.48

Expansion Tank, OEM - F10 535d, F02 730LdX

Price: $54.99 141.44

Expansion Tank Mounting Bracket, Rein - E46 323i/325i/328i/330i Manual Trans

Price: $54.99 80.53

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

Price: $57.99 89.56

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

Price: $57.99 146.44

Coolant Expansion Tank Kit, Rein - X3/X4 28i, 35i M40i

Price: $57.99 140.86

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

Price: $62.99

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

Price: $63.96 143.93

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

Price: $64.79 140.00

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

Price: $64.99 104.81

Coolant Expansion Tank Kit, Rein - E46, E83 X3, E53 X5 3.0

Price: $64.99 76.97

Coolant Expansion Tank - F48 X1, F39 X2 28i, MINI F56/F60

Price: $65.99 101.88

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

Price: $65.99 140.86

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

Price: $66.39 127.36

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

Price: $66.99 140.86

Expansion Tank Kit, Rein - E39 540i, E38 740i/iL/750iL, E31 840i/850i

Price: $66.99 133.94

Expansion Tank Mounting Bracket, Rein - E46 323i/325i/328i/330i Auto

Price: $67.99

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

Price: $68.49 110.23

Expansion Tank Vent Hose - E60 550i, E63 650i

Price: $69.03 72.66

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

Price: $69.99 108.00

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

Price: $69.99

Expansion Tank Kit, Rein - E60, E63

Price: $69.99

Expansion Tank Kit, Rein - E39 525i/528i/530i

Price: $69.99 142.30

Expansion Tank Kit, Rein - E53 X5 4.4/4.8is N62

Price: $70.99 97.00

Expansion Tank, Behr - F10 550i, F13 650i, F02 750i

Price: $38.90
50.69

Price: $40.99
49.68

Price: $40.99
123.38

Price: $43.23
45.50

Price: $44.99
76.93

Price: $46.90
64.18

Price: $47.49
140.86

Price: $47.55
50.05

Price: $49.99
95.24

Price: $50.99
127.36

Price: $51.08
53.77

Price: $51.08
53.77

Price: $51.49
143.93

Price: $51.99
112.72

Price: $52.99
137.48

Price: $54.99
141.44

Price: $54.99
80.53

Price: $57.99
89.56

Price: $57.99
146.44

Price: $57.99
140.86

Price: $63.96
143.93

Price: $64.79
140.00

Price: $64.99
104.81

Price: $64.99
76.97

Price: $65.99
101.88

Price: $65.99
140.86

Price: $66.39
127.36

Price: $66.99
140.86

Price: $66.99
133.94

Price: $68.49
110.23

Price: $69.03
72.66

Price: $69.99
108.00

Price: $69.99
142.30

Price: $70.99
97.00

Price: $72.99
140.86