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BMW Cooling Expansion Tank Parts

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E9x / E8x Coolant Tank & Power Steering Bracket W/ Harness

ES#4883212 - 622-0079 - E9x / E8x Coolant Tank & Power Steering Bracket W/ Harness - All of the hardware necessary to relocate your power steering pump and install a factory coolant tank on the driver's side of your vehicle - Precision Raceworks - BMW

All of the hardware necessary to relocate your power steering pump and install a factory coolant tank on the driver's side of your vehicle affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Precision Raceworks - Corporate Logo
ES#:
4883212
Mfg#:
622-0079
In Stock
$69.99 USD
Free Shipping
on orders $49 and up

E9x M3 Heavy Duty Aluminum Expansion Tank Kit

ES#4876028 - 054921LA02 - E9x M3 Heavy Duty Aluminum Expansion Tank Kit - The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind. - Turner Motorsport - BMW

The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4876028
Mfg#:
054921LA02
Ships on Aug 14, 2026
ON SALE! SAVE 10%
$449.99

This product was last offered at the strikethrough price on
05-02-2026

$404.99 USD
Free Shipping

E46 Coolant Expansion Tank

ES#3504768 - 17117573781 - E46 Coolant Expansion Tank - Includes cap and level sensor - Rein - BMW

Includes cap and level sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3504768
Mfg#:
17117573781
In Stock
$76.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2874179 - 17137607482 - Coolant Expansion Tank - Includes level sensor - Febi - BMW

Includes level sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2874179
Mfg#:
17137607482
In Stock
$151.99

This product was last offered at the strikethrough price on
04-16-2026

$104.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3209809 - 17137640515 - Coolant Expansion Tank - Includes level sensor - Rein - BMW
ECS Tuning recommends this product.

Includes level sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3209809
Mfg#:
17137640515
In Stock
$97.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank With Cap, Sensor, And Lower Securing Clamp

ES#3690750 - 17137787039KT - Coolant Expansion Tank With Cap, Sensor, And Lower Securing Clamp - Don't waste time replacing just the tank, replace it all at once to avoid down time with your BMW - Hamburg Tech - BMW

Don't waste time replacing just the tank, replace it all at once to avoid down time with your BMW affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
3690750
Mfg#:
17137787039KT
In Stock
$57.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 M3 Coolant Expansion Tank

ES#38023 - 17112283344 - E46 M3 Coolant Expansion Tank - Plastic expansion tank, including sealing cap - Genuine BMW - BMW

Plastic expansion tank, including sealing cap affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
38023
Mfg#:
17112283344
In Stock
7% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$215.23

This product was last offered at the strikethrough price on
03-30-2026

$199.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3023883 - 17117573781 - Coolant Expansion Tank - Does not include cap or coolant level sensor - Mahle-Behr - BMW

Does not include cap or coolant level sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mahle-Behr - Corporate Logo
ES#:
3023883
Mfg#:
17117573781
In Stock
$100.99

This product was last offered at the strikethrough price on
04-01-2026

$82.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 M3 Water Pipe Connecting Line

ES#37983 - 17112229053 - E46 M3 Water Pipe Connecting Line - Connects the expansion tank to the upper radiator hose - Genuine BMW - BMW

Connects the expansion tank to the upper radiator hose affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
37983
Mfg#:
17112229053
In Stock at Vendor
$177.99

This product was last offered at the strikethrough price on
05-07-2026

$172.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4304685 - 17111723520 - Coolant Expansion Tank - Replace your cracked or faded tank - Bavarian Autosport - BMW

Replace your cracked or faded tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4304685
Mfg#:
17111723520
In Stock
ON SALE! SAVE 20%
$39.99

This product was last offered at the strikethrough price on
05-02-2026

$31.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2733909 - 17117639021 - Expansion Tank Cap - Cap for plastic expansion tank - Genuine BMW - BMW

Cap for plastic expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
2733909
Mfg#:
17117639021
In Stock
22% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$34.96

This product was last offered at the strikethrough price on
06-04-2026

$27.29 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2718215 - 17137640514 - Coolant Expansion Tank - Includes level sensor - Genuine BMW - BMW

Includes level sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
2718215
Mfg#:
17137640514
Ships in 3 Business Days
Auto Notify
7% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$189.99

This product was last offered at the strikethrough price on
04-06-2026

$176.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Mounting Plate

ES#4304678 - 17111436251 - Expansion Tank Mounting Plate - Mounts to the side of the radiator for retaining the expansion tank - Bavarian Autosport - BMW

Mounts to the side of the radiator for retaining the expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with an automatic transmission only

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4304678
Mfg#:
17111436251
In Stock
ON SALE! SAVE 20%
$45.99

This product was last offered at the strikethrough price on
05-02-2026

$36.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4818588 - 17137823626 - Coolant Expansion Tank - Mounts towards the front of the engine bay. - Bremmen Parts - BMW MINI

Mounts towards the front of the engine bay. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818588
Mfg#:
17137823626
In Stock
ON SALE! SAVE 20%
$47.99

This product was last offered at the strikethrough price on
05-02-2026

$38.34 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2731801 - 17137542986 - Coolant Expansion Tank - Includes fluid level sensor - Mahle-Behr - BMW
ECS Tuning recommends this product.

Includes fluid level sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mahle-Behr - Corporate Logo
ES#:
2731801
Mfg#:
17137542986
In Stock at Vendor
$137.66 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Mounting Plate

ES#4304676 - 17111436250 - Expansion Tank Mounting Plate - Mounts to the side of the radiator for retaining the expansion tank - Bavarian Autosport - BMW

Mounts to the side of the radiator for retaining the expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with a manual transmission only

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4304676
Mfg#:
17111436250
In Stock
ON SALE! SAVE 20%
$44.99

This product was last offered at the strikethrough price on
05-02-2026

$35.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Cooling Expansion Tank Parts

A common source of overheating problems is a broken or leaking coolant expansion tank. Replace it with an OEM coolant expansion tank or quality aftermarket expansion tank to prevent future woes.

Other BMW Cooling Expansion Tank Parts

Let us help you find the parts that fit your BMW

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