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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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Water Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:591871

Part#: 11537565432

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Rein Thermostat - 88ï¿½C - E30, E34, E36, Z3

2X Entries Into Our F80 M3 Sweepstakes

T#:591800

Part#: 11537511580

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08-31-2026

$ 36.09 USD

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Common point of failure in the cooling system.

Upper Radiator Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:594378

Part#: 17127619684

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06-29-2026

$ 58.89 USD

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Over the years and with exposure to extremely hot coolant, the coolant hoses in your vehicle can take a beating. Being made of reinforced rubber, these hoses can fail in a number of ways. Splitting at a hose clamp, swelling, cracking, and breaking are just a few of the ways this hose can leave you stranded. Replace it at the first sign of wear to keep your coolant in your engine.

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OEM Rein Vent Hose - N63 4.4L

2X Entries Into Our F80 M3 Sweepstakes

T#:554680

Part#: 17127576363

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$ 25.64 USD

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

Fits the following engines:
N63 4.4L

OEM Rein Lower Expansion Tank Coolant Hose - E83 X3

2X Entries Into Our F80 M3 Sweepstakes

T#:363441

Part#: 11533400205

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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 Radiator Hose - Lower - E39

2X Entries Into Our F80 M3 Sweepstakes

T#:341242

Part#: 11531705224

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$ 36.09 USD

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Includes retaining clips

OEM Rein Lower Coolant Hose - N63 4.4L

2X Entries Into Our F80 M3 Sweepstakes

T#:554681

Part#: 17127575427

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$ 49.39 USD

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

Fits the following engines:
N63 4.4L

OEM Rein Lower Radiator Hose - E53 X5 3.0i 2000-2006

2X Entries Into Our F80 M3 Sweepstakes

T#:362444

Part#: 11537508688

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$ 34.19 USD

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This lower radiator cooling hose connects the passenger's side bottom of the radiator to the thermostat housing on X5 3.0i with the M54 engine.

This item fits the following BMWs:
2000-2006 E53 BMW X5 3.0i M54

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BMW Radiator Hose - 11531436408

2X Entries Into Our F80 M3 Sweepstakes

T#:46719183

Part#: CHK0002

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08-31-2026

$ 44.29 USD

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Keep your cooling system leak-free and ready for anything with this Rein radiator hose. Over time, heat cycles, pressure, and age take their toll on rubber, leading to soft spots, cracks, or swelling that can quickly turn into a coolant geyser. Rein hoses are built to meet or exceed OEM specs, using premium materials designed to handle extreme temps and high system pressure without breaking a sweat. Each hose features factory-correct fittings, bends, and diameters for a perfect fit—no trimming, stretching, or wrestling required. Whether you’re refreshing your cooling system during a maintenance overhaul or stopping a slow coolant leak before it becomes a major headache, this Rein radiator hose is what you need to get the job done right.

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Rein Cylinder Head Expansion Tank Hose CHE0925- Priced Each - F22 230...

2X Entries Into Our F80 M3 Sweepstakes

T#:34181285

Part#: 17129845173

Ships in 3 Business Days

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$ 28.49 USD

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Rein Cylinder Head Expansion Tank Hose CHE0925 is a top-quality component designed specifically for BMW vehicles, ensuring optimal coolant flow between the cylinder head and expansion tank. This hose is engineered to withstand high engine temperatures and pressures, preventing coolant leaks and safeguarding the engine from overheating. The Rein Cylinder Head Expansion Tank Hose CHE0925 is perfect for BMW enthusiasts who prioritize vehicle reliability and performance.

Manufactured from premium materials, this hose guarantees durability and longevity under demanding conditions. Its precise design ensures a perfect fit, making installation easy for both professional mechanics and DIY car enthusiasts. Available from Turner Motorsport, this product is an excellent choice for anyone looking to maintain peak engine performance.

Key Benefits:

Designed specifically for BMW vehicles to ensure a perfect fit and compatibility
Regulates coolant flow, preventing engine overheating and damage
Made from high-quality, durable materials that withstand extreme engine conditions
Easy installation for quick maintenance and hassle-free replacement
Ideal for both professional mechanics and DIY car enthusiasts
Available from Turner Motorsport, a trusted supplier of BMW parts

The Rein Cylinder Head Expansion Tank Hose CHE0925 is a must-have part for maintaining the cooling efficiency and overall health of your BMW engine.

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BMW E39 Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:388645

Part#: 17111436381

Back Ordered

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08-31-2026

$ 83.59 USD

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BMW E39 Coolant Expansion Tank is an essential component designed to maintain the proper coolant level in your vehicle's cooling system. Manufactured with high-quality materials, this expansion tank ensures reliable performance and durability, preventing engine overheating by accommodating the expansion of coolant as it heats up. The kit includes a level sensor and cap, providing everything needed for a seamless installation. This expansion tank is specifically engineered to meet the exact specifications of your BMW E39, offering a perfect fit and optimal functionality.

Complete Kit: Includes level sensor and cap for easy installation.
High-Quality Construction: Built with durable materials for long-lasting performance.
Prevents Overheating: Helps manage coolant expansion, ensuring engine protection.
Exact Fit: Designed to meet the precise specifications of your BMW E39.
Enhanced Reliability: Ensures proper coolant level maintenance for optimal cooling system function.

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Rein Cooling Hose - Cylinder Head To Thermostat - E60, E61

2X Entries Into Our F80 M3 Sweepstakes

T#:557206

Part#: 11537566329

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$ 27.99

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08-04-2026

$ 25.99 USD

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Replace your leaking hose

BMW Coolant Expansion Tank - 17137642160

2X Entries Into Our F80 M3 Sweepstakes

T#:45791749

Part#: 17137642160

In Stock

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

$ 75.69 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 Hose - Supply Line - E60, E61

2X Entries Into Our F80 M3 Sweepstakes

T#:557219

Part#: 17127546064

In Stock at Vendor

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This product was last offered at the strikethrough price on
05-13-2026

$ 49.17 USD

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Connects from water pump to top left of radiator

Water Pipe

2X Entries Into Our F80 M3 Sweepstakes

T#:594365

Part#: 11537502000

In Stock

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08-31-2026

$ 37.99 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. This water pipe runs from the back of the water pump housing to the expansion tank hose. Includes all required seals, needed for the install.

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Rein Coolant Hose - Lower - F01, F02, F06, F07, F10, F12

2X Entries Into Our F80 M3 Sweepstakes

T#:592014

Part#: 17127600836

In Stock

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08-31-2026

$ 45.59 USD

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Lower radiator hose connected to secondary radiator

Rein Coolant Line - E70

2X Entries Into Our F80 M3 Sweepstakes

T#:592002

Part#: 17127536235

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$ 29.44 USD

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Connects to the bottom of the expansion tank

Coolant Hose - Return Line

2X Entries Into Our F80 M3 Sweepstakes

T#:377696

Part#: 17127521778

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$ 31.34 USD

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Connects from water pump to top right of radiator

Coolant Connection Flange - N47

2X Entries Into Our F80 M3 Sweepstakes

T#:4840519

Part#: 11127810707

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06-17-2026

$ 40.99 USD

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Keep Your Coolant System Operating Properly And Leak Free. Quality Rein coolant flange attaches to the engine block below the intake manifold and flows coolant out of the engine.

Rein Upper Radiator Hose - F06, F07, F10, F12, F13

2X Entries Into Our F80 M3 Sweepstakes

T#:568809

Part#: 17127580957

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$ 72.99

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$ 65.99 USD

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From radiator to filter housing

Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:593072

Part#: 17127596841

In Stock

$ 29.88

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05-03-2026

$ 26.99 USD

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OEM Rein Expansion Tank - F01,F06,F10,F12,F13

2X Entries Into Our F80 M3 Sweepstakes

T#:555024

Part#: 17137647283

Ships in 2 Business Days

Sale - Save 5% $ 118.99

This product was last offered at the strikethrough price on
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$ 113.04 USD

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Replace your damaged expansion tank to prevent coolant loss or potential overheating issues.

his item fits the following BMW Chassis:
F01,F02,F06,F10,F12,F13

Fits BMW Engines including:
N54,N55,N57N

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Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:594291

Part#: 11537584549

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$ 30.39 USD

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Connects to the thermostat. Replacement from Rein.

Rein Coolant Hose - BMW F22/23 F3X

2X Entries Into Our F80 M3 Sweepstakes

T#:591823

Part#: 11537639998

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$ 40.84 USD

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Connects from water pump to block

Expansion Tank Mounting Plate

2X Entries Into Our F80 M3 Sweepstakes

T#:402140

Part#: 17111436250

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$ 67.44 USD

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Rein Coolant Hose - E60, E61

2X Entries Into Our F80 M3 Sweepstakes

T#:557207

Part#: 17127565075

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$ 40.58

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05-11-2026

$ 36.99 USD

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From radiator to thermostat

Water Pipe

2X Entries Into Our F80 M3 Sweepstakes

T#:599051

Part#: 11537589713

In Stock

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$ 26.59 USD

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Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:591959

Part#: 17111741167

Ships in 2 Business Days

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$ 66.49 USD

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Plastic has a limited lifespan - replace every 80,000 miles

BMW Engine Water Hose 11531711877

2X Entries Into Our F80 M3 Sweepstakes

T#:6947

Part#: 11531711877

In Stock

Sale - Save 5% $ 71.99

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08-31-2026

$ 68.39 USD

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GENUINE BMW ENGINE WATER HOSE 11531711877.--

This item fits the following BMWs:
BMW 7 Series - 750iL

--.

Coolant Expansion Tank

2X Entries Into Our F80 M3 Sweepstakes

T#:388723

Part#: 17137823626

In Stock

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$ 75.04 USD

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Mounts towards the front of the engine bay

Radiator Hose - Metal Flange

2X Entries Into Our F80 M3 Sweepstakes

T#:4826911

Part#: 17127619702

Ships in 2 Business Days

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$ 35.14 USD

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Cylinder Head Coolant Hose to keep your motor healthy for many miles ahead. Replace damaged or worn coolant hose with upgraded metal flange from Rein.

COOLANT HOSE

2X Entries Into Our F80 M3 Sweepstakes

T#:591352

Part#: 17127592651

In Stock at Vendor

Sale - Save 5% $ 29.99

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$ 28.49 USD

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Rein BMW Coolant Hose -
This item fits the following BMW Chassis:
F06,F10,F12,F13

Fits BMW Engines including:
N52N,N63,N63N

Expansion Tank Vent Pipe

2X Entries Into Our F80 M3 Sweepstakes

T#:402415

Part#: 17127521775

In Stock at Vendor

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$ 27.54 USD

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Replace your cracked and leaking hose with this replacement from Rein

Thermostat Housing W/ Thermostat Kit

2X Entries Into Our F80 M3 Sweepstakes
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:599063

Part#: 11538674895

In Stock

Sale - Save 5% $ 109.99

This product was last offered at the strikethrough price on
08-31-2026

$ 104.49 USD

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$ 109.99

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Rein Water Hose Problem Solver Kit - F chassis N55

2X Entries Into Our F80 M3 Sweepstakes

T#:53750119

Part#: 11537598237

Ships in 4 Business Days

Sale - Save 8% $ 26.99

This product was last offered at the strikethrough price on
08-31-2026

$ 24.87 USD

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$ 26.99

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Rein's Rubber Elbow Problem Solver Kit for the Coolant Feed Hose Replaces the Rubber End of the Hard Feed Line Without Having to Move the Exhaust or Replace the Entire Hard Line

Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:554682

Part#: 17127596831

In Stock at Vendor

Sale - Save 5% $ 21.99

This product was last offered at the strikethrough price on
08-31-2026

$ 20.89 USD

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$ 21.99

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Keep your engine running at operating temperature with this coolant hose

Rein Coolant Outlet Hose - E82, E88, E90, E92, E93, Z4

2X Entries Into Our F80 M3 Sweepstakes

T#:388670

Part#: 11537541992

In Stock

$ 40.99

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03-29-2026

$ 26.99 USD

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Attached to the outlet on the thermostat housing

Lower Radiator Hose To Thermostat Housing - Front

2X Entries Into Our F80 M3 Sweepstakes

T#:599049

Part#: 17122754223

Ships in 3 Business Days

Sale - Save 5% $ 87.99

This product was last offered at the strikethrough price on
08-31-2026

$ 83.59 USD

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$ 87.99

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Rein Upper Radiator Hose - E60, E63, E64

2X Entries Into Our F80 M3 Sweepstakes

T#:592004

Part#: 17127540665

Ships in 2 Business Days

Sale - Save 5% $ 79.99

This product was last offered at the strikethrough price on
08-31-2026

$ 75.99 USD

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$ 79.99

This product was last offered at the strikethrough price on
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$ 75.99 USD

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Connects water pump to radiator

Rein Water Pump Service Kit - N20

2X Entries Into Our F80 M3 Sweepstakes

T#:14023850

Part#: 11518635089-1

Ships in 4 Business Days

Sale - Save 5% $ 777.99

This product was last offered at the strikethrough price on
08-31-2026

$ 738.77 USD

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$ 777.99

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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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Expansion Tank Vent Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:592006

Part#: 17127541146

In Stock at Vendor

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08-31-2026

$ 35.14 USD

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Replace your leaking hose

Rein Transmission Oil Heat Exchanger Hose F33 430i, F23 230iX, F31 33...

2X Entries Into Our F80 M3 Sweepstakes

T#:33913483

Part#: 17127640287

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$ 37.04 USD

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The Hose Transmission Oil Heat Exchanger is a crucial component in maintaining the longevity and performance of your vehicle's transmission system. This part is designed to efficiently cool down the transmission oil, ensuring that your transmission operates at optimal temperatures, reducing wear and tear. Available at Turner Motorsport, this high-quality heat exchanger is engineered to meet the demands of high-performance vehicles, making it an excellent choice for both daily drivers and track enthusiasts.

Optimizes transmission oil temperature to prevent overheating
Enhances the lifespan of your transmission system
Durable construction for long-lasting performance
Ideal for performance and high-demand driving conditions
Compatible with a wide range of vehicle makes and models
Upgrade your vehicle’s transmission cooling system with the Hose Transmission Oil Heat Exchanger and drive with confidence knowing your transmission is protected.

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Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:379683

Part#: 17127568246

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$ 36.09 USD

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This is the return hose that attaches from the water pump to the radiator

Rein Water Pump Return Hose - E60, E63, E64

2X Entries Into Our F80 M3 Sweepstakes

T#:592005

Part#: 17127540667

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$ 25.64 USD

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Hose that pulls water from the water pump and disperses it to your engine

Radiator Hose - Radiator To Thermostat Housing

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T#:594316

Part#: 17127604546

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$ 28.49 USD

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Replacement radiator hose from Rein

Rein Coolant Hose - F22, F23, F30, F31, F32, F33, F34, F36

2X Entries Into Our F80 M3 Sweepstakes

T#:592012

Part#: 17127596838

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$ 48.44 USD

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Connects the thermostat to the radiator

Coolant Return Line

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T#:53856300

Part#: 11538650087

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$ 57.46 USD

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Rein Automotive turbo hoses are engineered to meet these rigorous demands, providing the reliability required for both the track and the street.

Coolant Hose - Upper

2X Entries Into Our F80 M3 Sweepstakes

T#:585137

Part#: 17127596837

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

$ 68.67 USD

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Coolant supply all around your engine is very important and if this is ever compromised by a leak or other complication, it can put your engines health in serious danger.

Rein - Return Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:17771593

Part#: 11537615492

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$ 43.69 USD

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Replace leaking or faulty hoses with Rein premium hoses to restore your vehicle to safe and optimal performance levels.

OEM Rein Lower Radiator Hose - E36 318 M42 1.8L

2X Entries Into Our F80 M3 Sweepstakes

T#:6957

Part#: 11531721709

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$ 20.89 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.

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