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BMW Expansion Tank Hoses

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N55 Exact-Fit Silicone Expansion Tank Hose

ES#4877300 - 006402LA03 - N55 Exact-Fit Silicone Expansion Tank Hose - Connects the coolant expansion tank to the upper radiator hose. Featuring durable silicone construction & pre-installed factory connectors for easy installation! - ECS - BMW

Connects the coolant expansion tank to the upper radiator hose. Featuring durable silicone construction & pre-installed factory connectors for easy installation! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4877300
Mfg#:
006402LA03
In Stock
ON SALE! SAVE 30%
$101.99

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

$71.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose - Return Line

ES#2578088 - 17128570061 - Coolant Hose - Return Line - Connects expansion tank to coolant hose feeding into radiator - Genuine BMW - BMW

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

Brand:
Genuine BMW - Corporate Logo
ES#:
2578088
Mfg#:
17128570061
In Stock
9% off MSRP

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

$54.77

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

$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 Expansion Tank Hose

ES#2803859 - 64218376153 - E46 Expansion Tank Hose - Expansion tank to heater core - Rein - BMW
ECS Tuning recommends this product.

Expansion tank to heater core 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#:
2803859
Mfg#:
64218376153
Ships in 1 day
$82.99

This product was last offered at the strikethrough price on
05-06-2026

$80.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose - Return Line

ES#4818585 - 17128570061 - Coolant Hose - Return Line - Connects expansion tank to coolant hose feeding into radiator - Bremmen Parts - BMW

Connects expansion tank to coolant hose feeding into radiator affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818585
Mfg#:
17128570061
In Stock
ON SALE! SAVE 19%
$36.99

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

$29.99 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

Expansion Tank Vent Hose

ES#3499695 - 17127618510 - Expansion Tank Vent Hose - Connects to the top of the expansion tank and the upper radiator hose - Rein - BMW

Connects to the top of the expansion tank and the upper radiator hose 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#:
3499695
Mfg#:
17127618510
In Stock
$32.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Silicone Expansion Tank Relocation Coolant Hose

ES#4723175 - 053082LA01 - Silicone Expansion Tank Relocation Coolant Hose - 60" silicone performance coolant hose featuring a molded 90 degree bend for neat installs. Used as a replacement coolant hose for the Turner N54 coolant expansion tank relocation. - Turner Motorsport - BMW

60" silicone performance coolant hose featuring a molded 90 degree bend for neat installs. Used as a replacement coolant hose for the Turner N54 coolant expansion tank relocation. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4723175
Mfg#:
053082LA01
In Stock
ON SALE! SAVE 16%
$73.99

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

$61.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Exact-fit Water Pipe Connecting Line

ES#3230761 - 013178ecs - Exact-fit Water Pipe Connecting Line - Connects the expansion tank to the upper radiator hose. Engineered in-house with perfectly formed fitment for a stronger, cleaner install. - ECS - BMW

Connects the expansion tank to the upper radiator hose. Engineered in-house with perfectly formed fitment for a stronger, cleaner install. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3230761
Mfg#:
013178ECS
In Stock
ON SALE! SAVE 30%
$155.99

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

$109.19 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank to Thermostat Coolant Hose

ES#3198299 - 17128616558 - Expansion Tank to Thermostat Coolant Hose - Connects the engine coolant expansion tank to the thermostat assembly and a heat exchanger - Genuine BMW - BMW

Connects the engine coolant expansion tank to the thermostat assembly and a heat exchanger affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For models with M Sports package only
Heat Exchanger - Engine

Brand:
Genuine BMW - Corporate Logo
ES#:
3198299
Mfg#:
17128616558
Ships in 1 day
4% off MSRP

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

$120.99

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

$115.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose - Expansion Tank

ES#2775226 - 17122284686 - Coolant Hose - Expansion Tank - Replace your leaking or worn out hose - Genuine BMW - BMW

Replace your leaking or worn out hose affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
2775226
Mfg#:
17122284686
Ships in 1 day
5% off MSRP

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

$60.99

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

$57.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Vent Hose

ES#4818584 - 17127618510 - Expansion Tank Vent Hose - Connects to the top of the expansion tank and the upper radiator hose - Bremmen Parts - BMW

Connects to the top of the expansion tank and the upper radiator hose affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818584
Mfg#:
17127618510
In Stock
ON SALE! SAVE 19%
$36.99

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

$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Return Hose

ES#178032 - 64216951946 - Radiator Return Hose - Connects from the top side of the radiator to the expansion tank - Genuine BMW - BMW

Connects from the top side of the radiator to the expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
178032
Mfg#:
64216951946
In Stock
3% off MSRP

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

$62.99

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

$60.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank Hose

ES#3184963 - 17128620944 - Coolant Expansion Tank Hose - Connects the expansion tank to the coolant return hose. - Genuine BMW - BMW

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

Brand:
Genuine BMW - Corporate Logo
ES#:
3184963
Mfg#:
17128620944
In Stock
3% off MSRP

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

$68.00

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

$65.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Return Hose

ES#24803 - 11531436410 - Return Hose - Connects the Expansion Tank to the Water Pipe - Genuine BMW - BMW

Connects the Expansion Tank to the Water Pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
24803
Mfg#:
11531436410
In Stock
$42.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#4773000 - 64218376153 - Expansion Tank Hose - Expansion tank to heater core - Bremmen Parts - BMW

Expansion tank to heater core affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4773000
Mfg#:
64218376153
Ships on Sep 23, 2026
Auto Notify
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

Expansion Tank Hose

ES#178073 - 64218376153 - Expansion Tank Hose - Expansion tank to heater core - Genuine BMW - BMW

Expansion tank to heater core affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
178073
Mfg#:
64218376153
In Stock
13% off MSRP

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

$79.29

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

$69.10 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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