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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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Upper Radiator Hose
Upper Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592200
Part#: 17127556614
Back Ordered
$ 16.99 USD
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$ 16.99 USD
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OEM Rein Lower Radiator Hose - M42 E30 318i/is
OEM Rein Lower Radiator Hose - M42 E30 318i/is
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6952
Part#: 11531717620
In Stock at Vendor
$ 16.99 USD
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$ 16.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure. This hose replaces the lower radiator hose that connects from the radiator outlet to the thermostat housing.

OEM Rein radiator hoses are always a perfect option when performing maintenance thanks to their high quality and longevity.

This item fits the following BMWs:
E30 BMW 318i, 318i Convertible, 318is

Fits BMW Engines including:
M42

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BMW Coolant Expansion Tank - 17139485733
BMW Coolant Expansion Tank - 17139485733
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45791753
Part#: 17139485733
In Stock at Vendor
$ 64.99

This product was last offered at the strikethrough price on
04-28-2026

$ 52.99 USD
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$ 52.99 USD
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Expansion tanks take constant abuse from high heat and harsh coolant, making them prone to cracking or failure over time. A damaged tank can quickly lead to overheating and serious engine damage, so replacement is critical at the first sign of trouble. Features: Direct fitment for hassle-free installation Precision-molded to OE specs for perfect sensor and hose connections Durable construction stands up to extreme heat and coolant chemicals Factory pressure-tested for reliable performance
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Rein Coolant Temperature Sensor - BMW E6X, E7X, E9X
Rein Coolant Temperature Sensor - BMW E6X, E7X, E9X
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52516266
Part#: ELC0090
Ships in 3 Business Days
New Item
$ 69.99 USD
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$ 69.99 USD
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The Rein ELC0090 is a critical component for BMW N52-series engines, replacing the often-ignored "angle connector" located beneath the intake manifold.
OEM Rein Lower Radiator Coolant Hose - E70 E71 F15 F16 N63
OEM Rein Lower Radiator Coolant Hose - E70 E71 F15 F16 N63
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17738371
Part#: 17127576358
In Stock at Vendor
$ 72.99 USD
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$ 72.99 USD
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Rein Coolant Hose CHK0722 is a high-performance replacement hose that connects the lower radiator to the water pump.
Upper Radiator Hose
Upper Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592179
Part#: 17127515500
In Stock
$ 7.71 USD
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$ 7.71 USD
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Coolant Hose - Supply Line
Coolant Hose - Supply Line
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379708
Part#: 17127521777
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$ 41.99 USD
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$ 41.99 USD
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Connects from water pump to top left of radiator
Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592158
Part#: 17122754219
Ships in 3 Business Days
$ 14.99 USD
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$ 14.99 USD
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Coolant Expansion Tank W/ Cap
Coolant Expansion Tank W/ Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592210
Part#: 17137529273
In Stock at Vendor
$ 44.99 USD
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$ 44.99 USD
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OEM Rein Radiator Coolant Cap
OEM Rein Radiator Coolant Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:38161716
Part#: 92810625703
In Stock
$ 11.99 USD
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$ 11.99 USD
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Rein Automotive OE Quality caps are designed to be direct replacements for OE caps. Rein caps are designed to match or exceed the OE materials used and are produced to the highest standards to ensure long service life. Rein Automotive OE quality caps keep the coolant system at the proper pressure, just like the OE cap.
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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#:592023
Part#: 17137647290
Ships in 3 Business Days
$ 85.99 USD
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$ 85.99 USD
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Plastic expansion tanks have a limited lifespan - replace every 80,000 miles
OEM Rein Cooling Hose - E10 1602, E10 2002tii
OEM Rein Cooling Hose - E10 1602, E10 2002tii
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34214794
Part#: 11531266469
In Stock at Vendor
$ 14.99 USD
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$ 14.99 USD
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Cooling Hose - CHR0915 by Rein is a premium replacement hose designed to deliver superior durability and performance. Manufactured by Rein Automotive, this cooling hose is engineered to meet or exceed OEM specifications, ensuring a perfect fit for a wide range of European vehicles. Ideal for preventing coolant leaks, overheating, and maintaining optimal engine temperature, the Cooling Hose - CHR0915 is a reliable solution for your vehicle's cooling system.

  • Direct-fit replacement for seamless installation
  • Engineered for durability and reliability
  • Reinforced construction for high-temperature resistance
  • Perfect for your classic BMW vehicles
  • Helps prevent coolant leaks and overheating

This cooling hose is a direct-fit replacement and comes with a reinforced design to withstand extreme temperatures and pressure fluctuations. It's an excellent choice for car enthusiasts and mechanics looking for high-quality, long-lasting parts. Turner Motorsport offers this premium hose, ensuring that your vehicle's cooling system performs at its best.

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Expansion Tank - 17137617362
Expansion Tank - 17137617362
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46478556
Part#: EPT0238
Ships in 3 Business Days
$ 56.99 USD
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$ 56.99 USD
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These expansion tanks tend to leak and will need replaced
Rein Coolant Expansion Tank - E65, E66
Rein Coolant Expansion Tank - E65, E66
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:593077
Part#: 17137647713
Ships in 3 Business Days
$ 99.99 USD
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$ 99.99 USD
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Replace your cracked or faded tank
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
Rein - Corporate Logo
T#:594306
Part#: 11537591889
Ships in 3 Business Days
$ 50.99

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

$ 28.99 USD
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$ 28.99 USD
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Replacement Water Hose With O-Ring from Rein
OEM Rein Heater Core Return Hose - E36 318 M42/44
OEM Rein Heater Core Return Hose - E36 318 M42/44
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:11079
Part#: 64211387010
Ships in 3 Business Days
$ 6.11 USD
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$ 6.11 USD
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Runs from the water valve to the engine. 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:
BMW 3 Series - 318i, 318i Convertible, 318is, 318ti

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Rein Water Pump Service Kit - N20
Rein Water Pump Service Kit - N20
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:14023854
Part#: 11518635089-2
In Stock at Vendor
$ 1,309.99

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

$ 763.99 USD
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$ 763.99 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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Rein Coolant Hose - E28, E30, E34
Rein Coolant Hose - E28, E30, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379671
Part#: 13541719966
Ships in 1 Business Day
$ 6.11 USD
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$ 6.11 USD
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Thermostat to throttle housing
Rein O-RING 14.4X3.0 - E38, E39
Rein O-RING 14.4X3.0 - E38, E39
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379805
Part#: 11537501777
Ships in 3 Business Days
$ 6.99 USD
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$ 6.99 USD
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Rein Thermostat - E70, E71
Rein Thermostat - E70, E71
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:403980
Part#: 11537550172
Ships in 1 Business Day
$ 67.99 USD
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$ 67.99 USD
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Replaces failed thermostat or as preventative maintenance for your cooling system
OEM Rein Coolant Hose - BMW E60 E63/E64 E65/E66
OEM Rein Coolant Hose - BMW E60 E63/E64 E65/E66
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45791754
Part#: 17127508011R
Ships in 3 Business Days
$ 35.99 USD
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$ 35.99 USD
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This hose runs from the lower radiator port on the passenger side of the radiator to the water pump on the engine. Rubber hoses can crack over time, leading to coolant loss. Replace your hose with this OEM Rein hose to eliminate leaks and prevent overheating.
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Expansion Tank Vent Hose
Expansion Tank Vent Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379672
Part#: 17127508013
Ships in 3 Business Days
$ 60.99 USD
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$ 60.99 USD
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A commonly leaking hose
OEM Rein Heater Coolant Hose - E53
OEM Rein Heater Coolant Hose - E53
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:12845
Part#: 64218409063
Ships in 3 Business Days
$ 10.99 USD
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$ 10.99 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#:20815179
Part#: 11537629401
Ships in 3 Business Days
$ 67.99 USD
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$ 67.99 USD
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Turbocharger Coolant Return Line
Turbocharger Coolant Return Line
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:4826913
Part#: 11538485578
Ships in 3 Business Days
$ 66.99 USD
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$ 66.99 USD
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Cylinder 1-4 Turbo Return Line. Keep your turbos healthy and lubricated. Rein quality replacement turbo return line.
BMW Radiator Hose Kit - 17127575427
BMW Radiator Hose Kit - 17127575427
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46719185
Part#: CHK0583
Ships in 3 Business Days
$ 69.99 USD
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$ 69.99 USD
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Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Radiator Hose - Engine To Radiator
Radiator Hose - Engine To Radiator
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594372
Part#: 17127612444
Ships in 3 Business Days
$ 57.99 USD
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$ 57.99 USD
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Replacement Radiator Hose - Engine To Radiator from Rein
Coolant Hose from Expansion Tank - E36
Coolant Hose from Expansion Tank - E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6964
Part#: 11531730351
Ships in 1 Business Day
$ 18.79 USD
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$ 18.79 USD
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This coolant hose connects the water hose part #11531738053 to the radiator coolant expansion tank.Fits E36 3 series with M50, S50 or S52 engine.

This item fits the following BMWs:
1992-1998 E36 BMW 325i 325is 325ic M3
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Rein Water Hose (Right Outlet) - E32 E34
Rein Water Hose (Right Outlet) - E32 E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:593082
Part#: 17221728944
Ships in 3 Business Days
$ 28.99 USD
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$ 28.99 USD
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Transmission Oil Cooler to Water Manifold
OEM Rein Coolant Hose - E32 E34
OEM Rein Coolant Hose - E32 E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6970
Part#: 11531741405
Ships in 1 Business Day
$ 14.99 USD
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$ 14.99 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.

This item fits the following BMWs:
BMW 5 Series - 530i, 530i wagon /540i
BMW 7 Series - 740i, 740iL

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Lower Radiator Hose To Thermostat Housing
Lower Radiator Hose To Thermostat Housing
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592151
Part#: 17121475561
Ships in 3 Business Days
$ 17.99 USD
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$ 17.99 USD
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Rein Engine Coolant Hose - BMW G11, G30 5
Rein Engine Coolant Hose - BMW G11, G30 5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52516262
Part#: CHE0993
Ships in 3 Business Days
New Item
$ 64.99 USD
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$ 64.99 USD
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Restore your cooling system’s integrity with the Rein CHE0993 Engine Coolant Hose.
BMW Radiator Hose Kit - 17127519257
BMW Radiator Hose Kit - 17127519257
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46719182
Part#: CHK0033
Ships in 3 Business Days
$ 66.99 USD
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$ 66.99 USD
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Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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Radiator Hose - Radiator To Thermostat Housing
Radiator Hose - Radiator To Thermostat Housing
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594376
Part#: 17127610704
Ships in 3 Business Days
$ 31.99

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

$ 19.99 USD
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$ 19.99 USD
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Replacement Radiator Hose - Radiator To Thermostat Housing from Rein
Rein Engine Coolant Hose - Upper Radiator To Expansion Tank - BMW G3X 5, 6, 7 ser.
Rein Engine Coolant Hose - Upper Radiator To Expansion Tank - BMW G3X...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52903294
Part#: 17129844478
Back Ordered
New Item
$ 49.99 USD
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$ 49.99 USD
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Upgrade your cooling system with the Rein Automotive replacement coolant hose, engineered to meet or exceed the rigorous standards of your BMW.
OEM Rein Radiator Return Hose - BMW E60 525i 530i M54
OEM Rein Radiator Return Hose - BMW E60 525i 530i M54
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:15115
Part#: 17127519257
Ships in 3 Business Days
$ 58.90 USD
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$ 58.90 USD
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Radiator hoses can become brittle over time, leading to cracks and leaks. Replace yours with this OEM Rein coolant hose to ensure your cooling system remains leak free for years to come.
BMW Radiator Hose - 11531705224
BMW Radiator Hose - 11531705224
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46719192
Part#: CHK0005
In Stock at Vendor
$ 43.99 USD
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$ 43.99 USD
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Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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OEM Rein Water Pump W/ Installation Kit - BMW E82/88 E9X N52 3.0L
OEM Rein Water Pump W/ Installation Kit - BMW E82/88 E9X N52 3.0L ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45997535
Part#: WPS0502
In Stock at Vendor
$ 811.99 USD
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$ 811.99 USD
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Rein Electric Water Pump Replacement Kits offer a valuable solution to failure-prone cooling-related components on the N52 BMW engine platforms. At the heart of these kits are OEM electric water pumps, which are complemented by Rein's problem solver hoses.
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BMW Radiator Hose Kit - 11537500750
BMW Radiator Hose Kit - 11537500750
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46753499
Part#: CHK0030R
Ships in 3 Business Days
$ 50.99 USD
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$ 50.99 USD
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Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.
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OEM Rein Thermostat Coolant Hose - E30 M20
OEM Rein Thermostat Coolant Hose - E30 M20
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:583586
Part#: 13541289976
Ships in 1 Business Day
$ 8.81 USD
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$ 8.81 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 Water Hose - 11531247915 - E36
Rein Water Hose - 11531247915 - E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:35735
Part#: 11531247915
Ships in 3 Business Days
$ 9.99 USD
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$ 9.99 USD
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BMW Water Hose -
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M42

Rein Water Pipe With O-Rings
Rein Water Pipe With O-Rings
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17704768
Part#: 11537519710
Ships in 3 Business Days
$ 46.99 USD
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$ 46.99 USD
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Water pipes are essential for proper cooling. If they are cracked, they are going to need to be replaced as soon as possible to avoid overheating your engine.
OEM Rein Coolant Expansion Tank Hose - BMW G01 G02 Gen1 B46
OEM Rein Coolant Expansion Tank Hose - BMW G01 G02 Gen1 B46
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757473
Part#: 17127535536
Back Ordered
$ 76.00

This product was last offered at the strikethrough price on
05-15-2026

$ 73.99 USD
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$ 73.99 USD
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This hose connects the heat management module to the expansion tank's lower port. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
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OEM Rein Coolant Hose - E30
OEM Rein Coolant Hose - E30
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379799
Part#: 13541719967
In Stock at Vendor
$ 14.14

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

$ 12.93 USD
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$ 12.93 USD
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Fix that leak or replace that old line with this OE replacement!
BMW Water Pump Kit - E9X/E8X N54/55
BMW Water Pump Kit - E9X/E8X N54/55
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616001
Part#: WPS0505
Ships in 3 Business Days
$ 944.99 USD
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$ 944.99 USD
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Late-model external water pumps are typically more dependable and easier to service, with no gasket or O-ring to worry about. Replacing higher-mileage units during routine cooling system maintenance is a smart way to add extra peace of mind. Includes: Water pump Thermostat assembly Water pump elbow Coolant hoses Necessary hardware
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Upper Radiator Hose
Upper Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:38161723
Part#: 17127811127
Ships in 3 Business Days
$ 43.99 USD
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$ 43.99 USD
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Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591989
Part#: 17127519254
Ships in 3 Business Days
$ 48.48

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

$ 44.99 USD
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$ 44.99 USD
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Attaches to the vent port on the expansion tank
Expansion Tank With Cap
Expansion Tank With Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616025
Part#: EPK0138
Ships in 3 Business Days
$ 71.99 USD
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$ 71.99 USD
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The coolant expansion tank allows excess coolant to flow in and out as temperatures rise and fall. Over time, repeated exposure to extreme temperature changes can cause the tank to crack, split, or break. To keep your cooling system sealed and functioning properly, any tank showing signs of damage—such as cracks, broken nipples, or compromised mounting points—should be replaced.
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Rein Radiator Expansion Tank Hose - G30 B48 B58
Rein Radiator Expansion Tank Hose - G30 B48 B58
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55821725
Part#: 17125A09423
In Stock at Vendor
New Item
$ 18.99 USD
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$ 18.99 USD
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While the modern B48 and B58 powerplants are incredibly robust, BMW’s choice of brittle plastics for their cooling loops remains a major weak link. This upper radiator vent hose runs constantly hot as it returns pressurized coolant back to the expansion tank. After years of being baked by engine bay heat, the thin plastic neck and internal quick-disconnect seals degrade. A hardened factory plastic line can snap at any moment, spraying coolant everywhere.
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Rein Expansion Tank Cap - E30, E34
Rein Expansion Tank Cap - E30, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592018
Part#: 17137639023
Ships in 3 Business Days
$ 14.99 USD
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$ 14.99 USD
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1.4 Bar pressure

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