Rein BMW Cooling System Parts & Accessories

BMW Coolant Expansion Tank - 17139485733

2X Entries Into Our F80 M3 Sweepstakes

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 Engine Coolant Hose - BMW G11, G30 5

2X Entries Into Our F80 M3 Sweepstakes

T#:52516262

Part#: CHE0993

Ships in 3 Business Days

$ 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.

OEM Rein Lower Radiator Coolant Hose - E70 E71 F15 F16 N63

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

T#:592179

Part#: 17127515500

In Stock

$ 7.71 USD

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$ 7.71 USD

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Coolant Hose - Supply Line

2X Entries Into Our F80 M3 Sweepstakes

T#:379708

Part#: 17127521777

Ships in 3 Business Days

$ 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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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 ...

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

OEM Rein Coolant Hose - E38 E39 M62 4.4L

2X Entries Into Our F80 M3 Sweepstakes

T#:375752

Part#: 11537511207

Ships in 3 Business Days

$ 25.83

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

$ 19.36 USD

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$ 19.36 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 O-RING 14.4X3.0 - E38, E39

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

Rein Coolant Expansion Tank - F97 F98 G01 G02 G05 G06 G07 - S58 B46 B...

2X Entries Into Our F80 M3 Sweepstakes

T#:55965843

Part#: 171386106612

Ships in 3 Business Days

$ 49.99 USD

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$ 49.99 USD

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Keep your ultimate driving machine cool under pressure with this replacement auxiliary expansion tank from Rein. On modern turbocharged BMWs, the secondary cooling system plays a critical role in managing intake charge air temperatures, making a solid reservoir vital for both spirited street driving and track day reliability.

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OEM Rein Heater Coolant Hose - E53

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

T#:592151

Part#: 17121475561

Ships in 3 Business Days

$ 17.99 USD

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$ 17.99 USD

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BMW Radiator Hose Kit - 17127519257

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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 Radiator Expansion Tank Hose - G30 B48 B58

2X Entries Into Our F80 M3 Sweepstakes

T#:55821725

Part#: 17125A09423

In Stock at Vendor

$ 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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OEM Rein Radiator Return Hose - BMW E60 525i 530i M54

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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 ...

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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 Coolant Expansion Tank Kit - F97 F98 G01 G02 G05 G06 G07 - S58 B...

2X Entries Into Our F80 M3 Sweepstakes

T#:55965839

Part#: 17138610661

Ships in 3 Business Days

$ 56.99 USD

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$ 56.99 USD

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Keep your ultimate driving machine cool under pressure with this replacement auxiliary expansion tank from Rein. On modern turbocharged BMWs, the secondary cooling system plays a critical role in managing intake charge air temperatures, making a solid reservoir vital for both spirited street driving and track day reliability.

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Rein Water Pipe With O-Rings

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

T#:38161723

Part#: 17127811127

Ships in 3 Business Days

$ 43.99 USD

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Qty

$ 43.99 USD

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Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

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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