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Rein BMW Cooling System Parts & Accessories

The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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Rein Coolant Hose - F10
Rein Coolant Hose - F10
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591820
Part#: 11537593513
In Stock
$ 31.99 USD
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$ 31.99 USD
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Coolant hose from the water pump
Rein Radiator Hose - Upper - E65, E66
Rein Radiator Hose - Upper - E65, E66
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379749
Part#: 17127535742
Ships in 3 Business Days
$ 89.99 USD
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$ 89.99 USD
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A common source of cooling system failure
Coolant Hose - Upper
Coolant Hose - Upper
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:585137
Part#: 17127596837
In Stock at Vendor
$ 79.85

This product was last offered at the strikethrough price on
08-13-2026

$ 72.76 USD
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$ 72.76 USD
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Coolant supply all around your engine is very important and if this is ever compromised by a leak or other complication, it can put your engines health in serious danger.
Rein Water Pump Return Hose - E60, E63, E64
Rein Water Pump Return Hose - E60, E63, E64
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592005
Part#: 17127540667
In Stock at Vendor
$ 26.99 USD
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$ 26.99 USD
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Hose that pulls water from the water pump and disperses it to your engine
Expansion Tank Vent Hose
Expansion Tank Vent Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592006
Part#: 17127541146
In Stock at Vendor
$ 36.99 USD
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$ 36.99 USD
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Replace your leaking hose
Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379683
Part#: 17127568246
Ships in 3 Business Days
$ 37.99 USD
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$ 37.99 USD
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This is the return hose that attaches from the water pump to the radiator
Rein Water Supply Hose - E60, E61
Rein Water Supply Hose - E60, E61
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591801
Part#: 11537522999
Ships in 3 Business Days
$ 39.99 USD
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$ 39.99 USD
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Serves as a Y-connection for the Thermostat and Water Pump
Coolant Hose - Priced Each
Coolant Hose - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:38195382
Part#: 17127592646
Ships in 3 Business Days
$ 39.99 USD
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$ 39.99 USD
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Upper Radiator Hose
Upper Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592162
Part#: 17122754221
In Stock
$ 32.29

This product was last offered at the strikethrough price on
06-29-2026

$ 30.99 USD
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$ 30.99 USD
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Rein Coolant Expansion Tank - E60, E61, E63, E64
Rein Coolant Expansion Tank - E60, E61, E63, E64
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402160
Part#: 17137542986
Ships in 1 Business Day
$ 82.99 USD
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$ 82.99 USD
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Includes fluid level sensor
OEM Rein Expansion Tank Hose - E53 X5 N62
OEM Rein Expansion Tank Hose - E53 X5 N62
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379752
Part#: 17127509965
Ships in 3 Business Days
$ 34.99 USD
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$ 34.99 USD
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This is one of the hoses exiting from the bottom of the expansion tank on your BMW. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
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OEM Rein Upper Radiator Hose - Z4 Roadster
OEM Rein Upper Radiator Hose - Z4 Roadster
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:362445
Part#: 17127514404
Ships in 1 Business Day
$ 51.99 USD
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$ 51.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
OEM Coolant Return Pipe from Water Pump Hose to Transmission Cooler Thermostat - E39 540i E38 740i
OEM Coolant Return Pipe from Water Pump Hose to Transmission Cooler T...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6945
Part#: 11531711384
In Stock at Vendor
$ 68.99 USD
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$ 68.99 USD
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This is the cooling system return hose that goes from the automatic transmission cooling thermostat to the hose that comes off the lower water pump outlet.1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il
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Radiator Hose
Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594373
Part#: 17127619255
Ships in 3 Business Days
$ 132.99 USD
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$ 132.99 USD
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Replacement Radiator Hose from Rein
Coolant Expansion Tank
Coolant Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591949
Part#: 17107514964
Ships in 3 Business Days
$ 80.99 USD
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$ 80.99 USD
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Includes bleeder screw
Rein Heater Hose - Supply - Z3
Rein Heater Hose - Supply - Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379690
Part#: 64218401809
Ships in 3 Business Days
$ 22.99 USD
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$ 22.99 USD
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Supplies the heater core with coolant
Rein Water Pump Service Kit - N20
Rein Water Pump Service Kit - N20
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:14023850
Part#: 11518635089-1
Ships in 3 Business Days
$ 777.99 USD
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$ 777.99 USD
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Kits include: water pump thermostat assembly head to thermostat hose w/ aluminum flange WP to engine hose WP to thermostat hose all necessary clamps and hardware This Rein water pump service kit addresses common coolant hose plastic flange failure and ensures that the water pump replacement repair is done right the first time. The water pump and thermostat are OEM Use of OE or Pentosin NF-G11 coolant is recommended
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OEM Rein Lower Radiator Hose - E83 N52 3.0L
OEM Rein Lower Radiator Hose - E83 N52 3.0L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379822
Part#: 17123422785
In Stock at Vendor
$ 37.99 USD
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$ 37.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
OEM Rein Coolant Expansion Tank Return Hose - E60 E63
OEM Rein Coolant Expansion Tank Return Hose - E60 E63
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:19545
Part#: 17127545653
Ships in 1 Business Day
$ 53.99

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

$ 52.99 USD
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$ 52.99 USD
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This is the coolant reservoir expansion tank return hose that connects to the bottom of the expansion tank. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure. ​

This item fits the following BMWs:
2004-2010 E60 BMW 545i 550i
2004-2010 E63 BMW 645ci 650i
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Upper Radiator Coolant Hose
Upper Radiator Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594378
Part#: 17127619684
In Stock
$ 69.38

This product was last offered at the strikethrough price on
06-29-2026

$ 51.99 USD
Limited Qty Sale
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$ 69.38

This product was last offered at the strikethrough price on
06-29-2026

$ 51.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
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Over the years and with exposure to extremely hot coolant, the coolant hoses in your vehicle can take a beating. Being made of reinforced rubber, these hoses can fail in a number of ways. Splitting at a hose clamp, swelling, cracking, and breaking are just a few of the ways this hose can leave you stranded. Replace it at the first sign of wear to keep your coolant in your engine.
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Rein Upper Radiator Hose - E60, E63, E64
Rein Upper Radiator Hose - E60, E63, E64
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592004
Part#: 17127540665
Ships in 1 Business Day
$ 79.99 USD
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$ 79.99 USD
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Connects water pump to radiator
Expansion Tank Vent Hose
Expansion Tank Vent Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591986
Part#: 17127519247
Ships in 3 Business Days
$ 29.99 USD
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$ 29.99 USD
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With quick connect coupling
Rein Transmission Oil Heat Exchanger Hose F33 430i, F23 230iX, F31 330i
Rein Transmission Oil Heat Exchanger Hose F33 430i, F23 230iX, F31 33...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:33913483
Part#: 17127640287
Ships in 3 Business Days
$ 38.99 USD
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$ 38.99 USD
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The Hose Transmission Oil Heat Exchanger is a crucial component in maintaining the longevity and performance of your vehicle's transmission system. This part is designed to efficiently cool down the transmission oil, ensuring that your transmission operates at optimal temperatures, reducing wear and tear. Available at Turner Motorsport, this high-quality heat exchanger is engineered to meet the demands of high-performance vehicles, making it an excellent choice for both daily drivers and track enthusiasts.

  • Optimizes transmission oil temperature to prevent overheating
  • Enhances the lifespan of your transmission system
  • Durable construction for long-lasting performance
  • Ideal for performance and high-demand driving conditions
  • Compatible with a wide range of vehicle makes and models

    Upgrade your vehicle’s transmission cooling system with the Hose Transmission Oil Heat Exchanger and drive with confidence knowing your transmission is protected.

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COOLANT HOSE
COOLANT HOSE
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591352
Part#: 17127592651
In Stock at Vendor
$ 29.99 USD
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$ 29.99 USD
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Rein BMW Coolant Hose -
This item fits the following BMW Chassis:
F06,F10,F12,F13

Fits BMW Engines including:
N52N,N63,N63N

Rein Radiator Hose - E70 X5
Rein Radiator Hose - E70 X5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:388766
Part#: 17127536230
In Stock at Vendor
$ 67.99 USD
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$ 67.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
OEM Rein Upper Radiator Hose - E53 X5 N62 4.4L 4.8L
OEM Rein Upper Radiator Hose - E53 X5 N62 4.4L 4.8L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:362526
Part#: 17127526856
Back Ordered
$ 83.99 USD
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$ 83.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following BMWs:
2003+ E53 BMW X5 N62 4.4L 4.8L

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Upper Radiator Hose
Upper Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:599684
Part#: 17127586774
In Stock
$ 42.99 USD
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$ 42.99 USD
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Rein Coolant Expansion Tank - E70
Rein Coolant Expansion Tank - E70
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592030
Part#: 17138621092
In Stock at Vendor
$ 100.99 USD
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$ 100.99 USD
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Replace your cracked or faded tank
Water Hose with Gasket
Water Hose with Gasket
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:599688
Part#: 11537560530
In Stock at Vendor
$ 21.99 USD
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$ 21.99 USD
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This short curved coolant hose connects from the aux water pump near the transmission.
BMW Expansion Tank With Cap - 17107514964
BMW Expansion Tank With Cap - 17107514964
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616026
Part#: EPK0025
Ships in 3 Business Days
$ 74.99 USD
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$ 74.99 USD
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The coolant expansion tank provides a place for excess coolant to flow as temperatures rise and fall. Because it’s exposed to constant heat cycles and pressure changes, it can eventually crack, split, or suffer damage to its nipples or mounting points. Keeping coolant properly contained within the system is essential, so if your tank shows signs of wear or damage, replacement is necessary. This direct-fit replacement installs easily and delivers the same heating and cooling performance as the factory unit. When replacing the tank, be sure to have additional coolant on hand. ECS Tuning carries a full range of vehicle-specific coolants designed to meet OEM specifications. Most German vehicles require specialized formulas—using the correct coolant will help prevent corrosion and ensure long-term reliability.
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OEM Rein Expansion Tank - E90 335d
OEM Rein Expansion Tank - E90 335d
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:555023
Part#: 17138570079
Ships in 3 Business Days
$ 124.99 USD
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$ 124.99 USD
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Replace your damaged expansion tank to prevent coolant loss or potential overheating issues.


This item fits the following BMW Chassis:
E90

Fits BMW Engines including:
M57

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OEM Rein Lower Radiator Hose - E53 X5 M62 4.4L 4.6L
OEM Rein Lower Radiator Hose - E53 X5 M62 4.4L 4.6L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375370
Part#: 11537500750
Ships in 3 Business Days
$ 33.99 USD
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$ 33.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs: 
2000-2003 E53 BMW X5 4.4i 4.6is

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OEM Rein Radiator Hose - E70 X5
OEM Rein Radiator Hose - E70 X5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379812
Part#: 17127537108
In Stock
$ 44.99 USD
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$ 44.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Lower Radiator Hose
Lower Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594367
Part#: 17127578703
In Stock at Vendor
$ 40.99 USD
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$ 40.99 USD
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Replace your swollen or leaking hose.
OEM Rein Throttle Body Return Hose - E34 525i
OEM Rein Throttle Body Return Hose - E34 525i
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379743
Part#: 11531738054
Ships in 1 Business Day
$ 61.99 USD
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$ 61.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Lower Radiator Hose To Thermostat Housing - Front
Lower Radiator Hose To Thermostat Housing - Front
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:599049
Part#: 17122754223
Ships in 1 Business Day
$ 87.99 USD
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$ 87.99 USD
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Rein Radiator Hose - Upper - E32, E34
Rein Radiator Hose - Upper - E32, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6960
Part#: 11531722682
In Stock at Vendor
$ 63.99 USD
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$ 63.99 USD
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BMW ENGINE WATER HOSE 11531722682.--

This item fits the following BMWs:
BMW 5 Series -535i
BMW 7 Series - 735i, 735iL

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OEM Rein Lower Radiator Hose - E36 318 M42 1.8L
OEM Rein Lower Radiator Hose - E36 318 M42 1.8L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6957
Part#: 11531721709
Ships in 3 Business Days
$ 21.99 USD
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$ 21.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592656
Part#: 64213400417
Ships in 1 Business Day
$ 20.99 USD
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$ 20.99 USD
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Connects the expansion tank to the heater core
Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379793
Part#: 17127534918
In Stock at Vendor
$ 90.99 USD
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$ 90.99 USD
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From water pump to radiator
Water Hose With O-Ring - Cylinder Head To Thermostat Housing
Water Hose With O-Ring - Cylinder Head To Thermostat Housing ...
2X Entries Into Our F80 M3 Sweepstakes
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:594303
Part#: 11537585023
Ships in 1 Business Day
$ 30.11 USD
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$ 30.11 USD
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Replacement Water Hose from Rein
Rein Lower Radiator Hose - E53 X5 N62 4.4L 4.8L
Rein Lower Radiator Hose - E53 X5 N62 4.4L 4.8L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:362530
Part#: 17127509963
Ships in 3 Business Days
$ 51.38

This product was last offered at the strikethrough price on
04-15-2026

$ 43.99 USD
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$ 43.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following BMWs:
2003+ E53 BMW X5 N62 4.4L 4.8L

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Rein Cylinder Head To Thermostat Hose - E83
Rein Cylinder Head To Thermostat Hose - E83
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591814
Part#: 11537552339
Ships in 1 Business Day
$ 37.06

This product was last offered at the strikethrough price on
08-26-2026

$ 33.74 USD
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$ 33.74 USD
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Replace your leaking coolant hose
OEM Rein Coolant Hose - E38 E39 M62 4.4L
OEM Rein Coolant Hose - E38 E39 M62 4.4L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375752
Part#: 11537511207
In Stock at Vendor
$ 25.83

This product was last offered at the strikethrough price on
08-13-2026

$ 23.23 USD
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$ 23.23 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Rein Expansion Tank Mounting Plate - E83
Rein Expansion Tank Mounting Plate - E83
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402421
Part#: 17113400017
Ships in 3 Business Days
$ 166.99 USD
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$ 166.99 USD
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Secures the expansion tank to the radiator
OEM Rein Expansion Tank Hose - E53 X5 M62 4.4L 4.6L
OEM Rein Expansion Tank Hose - E53 X5 M62 4.4L 4.6L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:363439
Part#: 11537505950
Ships in 1 Business Day
$ 27.99 USD
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$ 27.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs: 
2000-2003 E53 BMW X5 4.4i 4.6is

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OEM Rein Thermostat Coolant Hose - E53 M62
OEM Rein Thermostat Coolant Hose - E53 M62
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:20210
Part#: 11537500752
Ships in 3 Business Days
$ 21.99 USD
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$ 21.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
OEM Rein Upper Radiator Hose - E53 X5 M62 4.4L 4.6L
OEM Rein Upper Radiator Hose - E53 X5 M62 4.4L 4.6L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379731
Part#: 11537500746
In Stock at Vendor
$ 64.99 USD
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$ 64.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs: 
2000-2003 E53 BMW X5 4.4i 4.6is

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OEM Rein Radiator Feed Hose - E70 X5
OEM Rein Radiator Feed Hose - E70 X5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:583608
Part#: 17127536231
Ships in 3 Business Days
$ 62.99 USD
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$ 62.99 USD
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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Upper Radiator Hose
Upper Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:377397
Part#: 17127519248
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$ 100.99

This product was last offered at the strikethrough price on
09-29-2026

$ 93.99 USD
Free Shipping
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$ 93.99 USD
Free Shipping
Add to Wish List
Attaches to the water pump

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