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.

Expansion Tank, OEM - F10 528i 2011 (N52)

Replacement for your aged or leaking expansion tank. OEM-type replacement for BMW part #17137647284

Price: $81.99
150.86

View Product

Rein-Expansion-Tank-Mounting-Plate-17101439110-above-im-tn.jpg

Expansion Tank Mounting Plate, Rein - E53 X5 4.4/4.6is/4.8is

Expansion tank frame makes replacement a breeze!

Price: $79.99
141.02

View Product

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

View Product

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

View Product

BMW-17137542986-17-13-7-542-986-SF-Behr-Hella-Service-Coolant-Expansion-Tank-sm.jpg

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: $79.19
146.44

View Product

BMW-17113438717-17-11-3-438-717-SF-Mahle-Behr-Expansion-Tank-Thermostat-sm.jpg

Expansion Tank Thermostat (75C), Mahle Behr - E83 X3 3.0si Automatic

High quality, 24 Month Warranty

Price: $78.99
88.25

View Product

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

View Product

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: $77.86
146.44

View Product

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

View Product

Engine Coolant Expansion Tank, URO - G05 X5 G06 X6 G07 X7 40i

Quality aftermarket coolant reservoir tank for the main cooling system on B58-powered X5/X6/X7 models.

Price: $74.99

View Product

Coolant-Expansion-Tank-E9X-E82-E84-E89-Z4-OEM-17137640514-wp-tn.jpg

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

Stock replacement coolant tank for original cooling performance

Price: $74.38
142.89

View Product

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

View Product

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

View Product

Expansion Tank Kit, Rein - E60, E63

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

Price: $69.99

View Product

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

View Product

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

Genuine BMW # 17127534917

Price: $69.03
72.66

View Product

Intercooler-Expansion-Tank-Rein-F10-F13-F02-17137647281-wp-tn.jpg

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

View Product

Rein-Expansion-Tank-Mounting-Bracket-17111436251-im-tn.jpg

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

Expansion tank frame makes replacement a breeze!

Price: $67.99

View Product

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

Replacement coolant reservoir identical to the original BMW part #17137640514

Price: $66.99
140.86

View Product

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

View Product

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

View Product

Coolant-Expansion-Tank-OEM-BMW-F48-X1-F39-X2-28i-wp-sm.jpg

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

View Product

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

View Product

Complete-Coolant-Expansion-Tank-Rein-17137787039-tn.jpg

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

View Product

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

OEM tank replaces BMW part #17117573781

Price: $64.99
104.81

View Product

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

OE Replacement for your aged or damaged expansion tank

Price: $64.79
140.00

View Product

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

Stock replacement coolant tank for original cooling performance

Price: $63.99
141.44

View Product

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

View Product

Coolant-Expansion-Tank-F22-F30-F32-B46-B58-17138677649-Vaico-im-sm.jpg

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

View Product

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

Replacement coolant reservoir identical to the original BMW part #17137647713

Price: $57.99
146.44

View Product

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

View Product

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

View Product

Rein-Expansion-Tank-Mounting-Bracket-17111436250-back-wp-tn.jpg

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

Expansion tank frame makes replacement a breeze!

Price: $54.99
80.53

View Product

Coolant Expansion Tank, Meyle - F48 X1, F39 X2, F44 228i

Direct replacement for your aged or damaged expansion tank

Price: $53.99

View Product

Intercooler-Reservoir-Coolant-Hose-BMW-17127584405-wp-tn.jpg

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: $53.37
57.60

View Product

Intercooler-Reservoir-Coolant-Hose-BMW-17127575432-wp-tn.jpg

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: $53.37
57.60

View Product

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

View Product

Charge-Air-Cooler-Expansion-Tank-Rein-F22-F3X-B58-17138617045-im-sm.jpg

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

Replacement for your aged or damaged expansion tank

Price: $51.99

View Product

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

View Product

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

View Product

Sort by Name

Sort by Price

Expansion Tanks

Expansion Tank, OEM - F10 528i 2011 (N52)

Price: $81.99 150.86

Expansion Tank Mounting Plate, Rein - E53 X5 4.4/4.6is/4.8is

Price: $79.99 141.02

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

Price: $79.99

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

Price: $79.99

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

Price: $79.19 146.44

Expansion Tank Thermostat (75C), Mahle Behr - E83 X3 3.0si Automatic

Price: $78.99 88.25

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

Price: $77.99

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

Price: $77.86 146.44

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

Price: $76.44 90.45

Engine Coolant Expansion Tank, URO - G05 X5 G06 X6 G07 X7 40i

Price: $74.99

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

Price: $74.38 142.89

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

Price: $72.99 140.86

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

Price: $70.99 97.00

Expansion Tank Kit, Rein - E60, E63

Price: $69.99

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

Price: $69.99 142.30

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

Price: $69.03 72.66

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

Price: $68.49 110.23

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

Price: $67.99

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

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

Price: $66.39 127.36

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 Kit, Rein - E46, E83 X3, E53 X5 3.0

Price: $64.99 76.97

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

Price: $64.99 104.81

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

Price: $64.79 140.00

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

Price: $63.99 141.44

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

Price: $63.96 143.93

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

Price: $62.99

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

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

Price: $57.99 89.56

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

Price: $54.99 80.53

Coolant Expansion Tank, Meyle - F48 X1, F39 X2, F44 228i

Price: $53.99

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

Price: $53.37 57.60

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

Price: $53.37 57.60

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

Price: $52.99 137.48

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

Price: $51.99

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

Price: $51.99 112.72

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

Price: $81.99
150.86

Price: $79.99
141.02

Price: $79.19
146.44

Price: $78.99
88.25

Price: $77.86
146.44

Price: $76.44
90.45

Price: $74.38
142.89

Price: $72.99
140.86

Price: $70.99
97.00

Price: $69.99
142.30

Price: $69.03
72.66

Price: $68.49
110.23

Price: $66.99
140.86

Price: $66.99
133.94

Price: $66.39
127.36

Price: $65.99
101.88

Price: $65.99
140.86

Price: $64.99
76.97

Price: $64.99
104.81

Price: $64.79
140.00

Price: $63.99
141.44

Price: $63.96
143.93

Price: $57.99
146.44

Price: $57.99
140.86

Price: $57.99
89.56

Price: $54.99
80.53

Price: $53.37
57.60

Price: $53.37
57.60

Price: $52.99
137.48

Price: $51.99
112.72

Price: $51.49
143.93