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Rein BMW Coolant & Radiator Hoses

We offer replacement hoses from several OE brands that we trust, along with performance silicone upgrades for those who want increased wear resistance compared to factory rubber.
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Rein Heater Hose - E32, E34
Rein Heater Hose - E32, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:20514
Part#: 64211390935
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$ 12.99 USD
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$ 12.99 USD
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HOSE F WATER VALVE AND LEFT 64211390935 Manufactured by CRP

OEM Radiator Water Valve Hose - Left - E38 740
OEM Radiator Water Valve Hose - Left - E38 740
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:11094
Part#: 64218391122
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$ 6.54 USD
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$ 6.54 USD
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This is the hose that runs from the left radiator to the water valve. 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: 
1999-2001 E38 BMW 740i 740il

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Upper Radiator Hose
Upper Radiator Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:12806792
Part#: 17129802110
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$ 52.99 USD
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$ 52.99 USD
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OEM Rein Coolant Expansion Tank Overflow Hose - BMW F25 X3, F26 X4 N52 N20 N55
OEM Rein Coolant Expansion Tank Overflow Hose - BMW F25 X3, F26 X4 N5...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757476
Part#: 17128651298
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$ 31.99 USD
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$ 31.99 USD
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This hose connects the expansion tank to the upper radiator hose. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
BMW Radiator Hose Kit - 11537830715
BMW Radiator Hose Kit - 11537830715
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46719180
Part#: CHK0376R
Ships in 3 Business Days
$ 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 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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Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592009
Part#: 17127563852
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$ 39.99 USD
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$ 39.99 USD
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Connects the transmission heat exchange to the coolant return line
Return Hose
Return Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17704695
Part#: 11537637059
Ships in 3 Business Days
$ 59.99 USD
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$ 59.99 USD
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OE quality return hose for the cooling system.
Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379702
Part#: 17127508014
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$ 25.99 USD
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$ 25.99 USD
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This is the return hose that attaches from the water pump to the radiator
Rein Radiator Hose - Radiator To Thermostat
Rein Radiator Hose - Radiator To Thermostat
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17605210
Part#: 17127612445
Ships in 3 Business Days
$ 58.99 USD
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$ 58.99 USD
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Rein lower radiator hose replacement.
Expansion Tank Hose
Expansion Tank Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379785
Part#: 17111737819
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$ 26.99 USD
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$ 26.99 USD
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Connects the expansion tank to the radiator
OEM Rein Coolant Supply Hose - E65 E66
OEM Rein Coolant Supply Hose - E65 E66
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375745
Part#: 17127508010
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$ 134.99 USD
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$ 134.99 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 Coolant Hose
Upper Radiator Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58489958
Part#: 17128654834
Back Ordered
New Item
$ 65.99 USD
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$ 65.99 USD
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Protect your engine against severe heat soak and maintain precise cooling system pressure with a Rein Upper Radiator Hose. Engineered as a direct fit replacement for degradation prone original equipment hoses, this upper radiator line transfers high temperature coolant straight to the main radiator. Manufactured with high grade heat resistant EPDM rubber and OEM style quick connect fittings, it provides exceptional resistance to internal pressure spikes, ozone degradation, and chemical breakdown under demanding driving conditions.
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Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616350
Part#: 11537643177
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New Item
$ 64.99 USD
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$ 64.99 USD
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Maintain maximum thermal efficiency on the track or the street with this precision-engineered turbocharger coolant line by Rein.

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