Rein BMW Cooling System Parts & Accessories

Thermostat Housing to Water Pipe Cooling Hose - E30 325e 325i ...

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T#:19253

Part#: 11531718982

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$ 6.22 USD

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This is the cooling system water hose that goes from the thermostat housing to the water pipe on E30 3 series.

This item fits the following BMWs:
1988-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix

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Rein Expansion Tank Hose - E39

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T#:375748

Part#: 11531438633

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08-31-2026

$ 18.04 USD

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Runs from the expansion tank to auxiliary water pump

Rein Radiator Hose - Upper - E36, Z3

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T#:6973

Part#: 11531743535

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08-31-2026

$ 16.14 USD

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OEM BMW ENGINE WATER HOSE 11531743535.--

This item fits the following BMWs:
BMW 3 Series - 318i, 318i Convertible, 318is, 318ti
BMW Z Series - Z3 1.9

--.

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Rein Thermostat Assembly - F Chassis, G-Chassis - B48

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T#:53891628

Part#: 11537644811

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This product was last offered at the strikethrough price on
06-10-2026

$ 274.43 USD

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Whether you're managing a fleet of "spirited" daily drivers or prepping a chassis for the circuit, the Rein CTA0079 offers the peace of mind that comes with OE-quality engineering.

OEM Rein Water Pump W/ Installation Kit - BMW E82/88 E9X N52 3.0L ...

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T#:45997535

Part#: WPS0502

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08-31-2026

$ 770.77 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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Rein Coolant Expansion Tank - E60, E61, E63, E64

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T#:402160

Part#: 17137542986

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08-31-2026

$ 78.84 USD

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Includes fluid level sensor

BMW Radiator Hose Kit - 11537500750

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T#:46753499

Part#: CHK0030R

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08-31-2026

$ 48.03 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 Coolant Hose - E36 Z3

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T#:379763

Part#: 11531743295

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08-31-2026

$ 13.29 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 Expansion Tank W/ Cap

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T#:592210

Part#: 17137529273

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08-31-2026

$ 42.74 USD

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Rein Water Pump Service Kit - N20

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T#:14023856

Part#: 11518635089-3

Special Order: No Guaranteed ETA

Sale - Save 24% $ 898.99

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08-24-2026

$ 680.19 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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Upper Radiator Hose - Short Section

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T#:592156

Part#: 17122754203

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$ 14.24 USD

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OEM Rein Coolant Hose - E60 E61 E83 Z4

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T#:583591

Part#: 11537519494

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$ 18.04 USD

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Attaches from inlet pipe to heat exchanger. 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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Coolant Hose

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T#:592158

Part#: 17122754219

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Upper Radiator Hose

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T#:3136231

Part#: 17129800479

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$ 32.29 USD

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Turbocharger Coolant Return Line

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T#:4826913

Part#: 11538485578

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$ 63.64 USD

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Cylinder 1-4 Turbo Return Line. Keep your turbos healthy and lubricated. Rein quality replacement turbo return line.

Turbocharger Coolant Return Line

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T#:4826914

Part#: 11539896890

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$ 52.24 USD

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OEM Rein Radiator Coolant Cap

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T#:38161716

Part#: 92810625703

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$ 11.12 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 Turbo Cooling Line - Return

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T#:17771598

Part#: 11538663517

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Sale - Save 17% $ 86.99

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

$ 72.28 USD

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Rein turbo hoses are manufactured with premium OE quality material to offer maximum protection from premature failures.

Rein Coolant Inlet Hose Section - E82, E83, E88, E90, E91, E92, E93 ...

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T#:388668

Part#: 11537535829

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08-31-2026

$ 19.94 USD

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Replaces the rubber section of the water pump inlet pipe - includes two clamps

Expansion Tank Vent Hose

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T#:379672

Part#: 17127508013

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$ 57.94 USD

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A commonly leaking hose

Rein Water Pump Service Kit - N20

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T#:14023861

Part#: 11518635089-4

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Sale - Save 5% $ 898.99

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08-31-2026

$ 854.04 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 Turbo Charger Cooling Hose - Return

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T#:34080768

Part#: 11537558903

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$ 56.99 USD

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Turbo Charger Cooling Hose - Return is essential for maintaining the efficiency and performance of your turbocharged vehicle. This high-quality return hose is specifically designed to handle the intense heat and pressure generated by the turbocharger system. Manufactured using durable materials, this cooling hose ensures optimal coolant flow to keep your engine running at peak performance. Available at Turner Motorsport, it’s the perfect upgrade or replacement part for your vehicle’s turbo system.

High-performance cooling solution for turbocharged engines
Ensures efficient coolant circulation to prevent overheating
Manufactured from heat-resistant and durable materials
Direct fit for a hassle-free installation
Designed for long-lasting durability and reliability
Compatible with a variety of makes and models

This Turbo Charger Cooling Hose - Return from Turner Motorsport is the ideal choice for any turbocharged engine, ensuring your vehicle operates smoothly and efficiently.

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OEM Rein Radiator Cap - E21 E24 E10 E12 E23 E28

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T#:7395

Part#: 17111100848

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$ 11.39 USD

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The radiator tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap. Often times, the coolant is not kept under enough pressure to keep it from boiling or expanding too much. This cap keeps all the heat and liquid inside the coolant system for maximum efficiency. Should be replaced each time major coolant system service is performed.

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Expansion Tank - 17137617362

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T#:46478556

Part#: EPT0238

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08-31-2026

$ 53.28 USD

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These expansion tanks tend to leak and will need replaced

Coolant Vent Hose

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T#:593064

Part#: 17127536236

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$ 26.59 USD

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BMW Expansion Tank With Cap - 17107514964

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T#:46616026

Part#: EPK0025

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$ 70.63 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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Rein Coolant Expansion Tank - E65, E66

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T#:593077

Part#: 17137647713

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$ 94.99 USD

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Replace your cracked or faded tank

BMW Turbo Cooling Line

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T#:46478582

Part#: CHT0690

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04-28-2026

$ 52.98 USD

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Your turbo is constantly working under extreme heat and pressure, generating serious boost every time you get on the gas. The turbo cooling lines are responsible for circulating coolant through the turbocharger, keeping temperatures in check and safeguarding internal components from excessive heat. With time, these lines can corrode, crack, or clog—compromising coolant flow and system efficiency. If left unchecked, a failing line can lead to overheating, loss of performance, or even costly turbo damage. Why replacing them matters: Protect your turbo – Ensures proper cooling to prevent heat soak and extend turbo life. Stop leaks early – Prevent small coolant drips from turning into bigger, more expensive problems. Keep performance consistent – Reliable cooling means steady boost and dependable operation. Don’t let a tired cooling line put your turbo at risk—replace it and keep your forced-induction system performing at its best.

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Lower Radiator Hose To Thermostat Housing

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T#:592151

Part#: 17121475561

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08-31-2026

$ 17.09 USD

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BMW Radiator Hose Kit - 17127575427

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T#:46719185

Part#: CHK0583

Ships in 3 Business Days

Sale - Save 5% $ 69.99

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08-31-2026

$ 66.34 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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Expansion Tank Mounting Plate

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T#:591946

Part#: 17101439110

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08-31-2026

$ 76.94 USD

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OEM Rein Lower Radiator Hose - E34 525i

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T#:6962

Part#: 11531722852

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$ 12.34 USD

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$ 12.99

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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 Coolant Temperature Sensor - BMW E6X, E7X, E9X

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T#:52516266

Part#: ELC0090

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$ 66.49 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.

Rein Coolant Hose Supply Elbow - F22 F23 F30 F32 F33 F36 F87 - N55 ...

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T#:53820908

Part#: CHE0985

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Sale - Save 67% $ 73.99

This product was last offered at the strikethrough price on
07-09-2026

$ 24.69 USD

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The Rein coolant hose elbow is a targeted engineering solution designed to bypass the flaws of the factory assembly. By isolating the failure prone rubber section, it allows for replacement without disturbing the exhaust manifold or cylinder head connections. This is the strategic choice for teams and technicians who prioritize rapid turnaround and system integrity.

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OEM Rein Coolant Hose - BMW E60 E63/E64 E65/E66

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T#:45791754

Part#: 17127508011R

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Sale - Save 6% $ 35.99

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08-31-2026

$ 33.75 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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Rein Thermostat - E70, E71

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T#:403980

Part#: 11537550172

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$ 64.59 USD

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Replaces failed thermostat or as preventative maintenance for your cooling system

Upper Radiator Hose

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T#:592183

Part#: 17127515501

In Stock

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08-31-2026

$ 12.34 USD

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OEM Rein Thermostat Coolant Hose - E30 M20

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T#:583586

Part#: 13541289976

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Sale - Save 5% $ 8.81

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08-31-2026

$ 8.37 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

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T#:379805

Part#: 11537501777

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OEM Rein Expansion Tank Hose - E53 X5 N62 4.4L 4.8L

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T#:379797

Part#: 17127509966

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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 Lower Heater Hose - E30

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T#:379681

Part#: 11531714636

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$ 6.77 USD

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Heats & cools the throttle body

Expansion Tank Hose

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T#:375751

Part#: 17111723521

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$ 16.14 USD

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Connects the expansion tank to the radiator

OEM Rein Turbocharger Coolant Return Line - BMW & MINI B36 B46/B48 ...

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T#:45757431

Part#: 11539488188

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$ 53.19 USD

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The coolant return hose is responsible for taking cooling from the turbocharger and returning it back to the engine coolant system, allowing a free flow of coolant to keep the turbocharger temperatures under control.

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Rein Coolant Hose - E28, E30, E34

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T#:379671

Part#: 13541719966

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Thermostat to throttle housing

Water Pump

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T#:46478542

Part#: WPR0046

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$ 755.36 USD

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Don't take your car's cooling system for granted. A waterpump failure can cost you an engine, which is why preventatively replacing your BMWs waterpump and refreshing the cooling system every 60,000 miles. The water pump is a weak point is the cooling system. Replacing your waterpump will go a long way for keeping your car on the road and operating properly. This water pump fits many 2006 and newer BMW 6 cylinder engines, specifically all the BMWs with the N51, N52, N53 engines. You will also need to purchase replacement aluminum screws Part #11510392553

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Rein Engine Coolant Reservoir - BMW G1X, G3X

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T#:52516268

Part#: EPT0274

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$ 109.24 USD

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Protect your BMW investment with the Rein EPT0274 Engine Coolant Reservoir, the professional’s choice for cooling system restoration.

Rein Thermostat Assembly E38 740iL

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T#:34114233

Part#: 11531437526

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$ 65.54 USD

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Regulates Engine coolant temperature. Comes with aluminum housing, O-ring, and sensor.

Rein- Coolant Hose F10 535i, F13 640i, F07 535i

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T#:34080749

Part#: 17127580963

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$ 79.79 USD

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Rein Coolant Hose is a premium replacement part designed for BMW models, ensuring efficient and reliable coolant flow throughout the engine’s cooling system. This hose is crucial for regulating engine temperature and preventing overheating, maintaining optimal performance in a wide range of driving conditions. Manufactured to meet or exceed OEM specifications, the Rein Coolant Hose offers a direct-fit solution for easy installation and long-lasting durability. Available through Turner Motorsport, this coolant hose is the ideal upgrade for BMW owners looking to maintain or improve their vehicle’s cooling system.

Specifically designed for BMW models to ensure perfect fit and compatibility
Regulates coolant flow to prevent engine overheating
Constructed from high-quality, heat-resistant materials for durability
Reduces the risk of leaks and cooling system failures
Direct-fit replacement
Meets OEM standards for reliable cooling system performance

Enhance your BMW’s cooling efficiency and engine reliability with the Rein Coolant Hose, providing the necessary protection against overheating and coolant system failure.

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