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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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Turner Motorsport - Corporate Logo
T#:56327183
Part#: 060289LA02
In Stock
New Item
$ 349.99

This product was last offered at the strikethrough price on
07-23-2026

$ 329.99 USD
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$ 329.99 USD
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BMWs are well-known for their problematic cooling systems, which are often the cause of irreversible engine damage and a hefty repair bill. The coolant expansion tank—a crucial component responsible for holding hot engine coolant under high pressure—is a common cause of cooling system issues. Unfortunately, BMW chose to manufacture the factory F8X expansion tank out of plastic. After years of exposure to high coolant temperatures, ambient engine bay heat, and chemical-rich antifreeze, the plastic degrades, eventually weakening enough to fail catastrophically. With this issue in mind, our team of BMW enthusiasts engineered the ultimate cooling system upgrade for F80 M3, F82/F83 M4, and F87 M2 Competition owners: a robust intercooler expansion tank that is built to last! Constructed from durable 5052 TIG-welded aluminum, this tank withstands high temperatures and pressures without deteriorating over time. Unlike the OEM molded plastic tank, this alternative is not prone to cracking, leaking, or weakening. With the Turner Motorsport Aluminum Intercooler Expansion Tank Kit, you'll never experience expansion tank failure again! Ideal for track-driven cars, this upgrade prevents catastrophic failures that cause charge-air temp spikes and limp mode due to coolant loss in a system with no level sensor. Unlike other aftermarket coolant reservoirs, this tank retains the factory coolant capacity and features a laser-cut Turner logo plate at the top of the tank to provide an exact level for filling. To guarantee exact fitment, the upgraded tank was designed using advanced 3D CAD modeling. All bungs, nipples, and fittings are precision-machined to ensure a secure seal with factory hose ends. Designed for both high-performance builds and daily drivers, the tank features a premium wrinkle black powder coat for a sleek "OEM+" look. This durable finish goes beyond style—it prevents corrosion for long-lasting reliability. Avoid the risks of the factory expansion tank—upgrade your S55-equipped BMW today and drive with confidence!
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Turner Motorsport Silicone Radiator Hoses - F8X S55
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:57543678
Part#: 008643LA04KT
In Stock
New Item
$ 89.99 USD
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$ 89.99 USD
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Tired of dealing with brittle, dry-rotted rubber hoses? Whether you're refreshing your cooling system or replacing aging components, our Silicone Radiator Coolant Hose Set is the ultimate upgrade. Designed for durability, performance, and a factory-perfect fit, these premium silicone hoses outperform standard rubber in every way.

Why Choose Silicone Over Rubber?

Made from heavy-duty, reinforced 4-ply fluorosilicone, Turner Motorsport hoses withstand extreme temperatures and pressures far beyond OEM rubber hoses. Engineered to resist oil, fuel, and electrochemical degradation, these hoses are tested for continuous operation at 250°F and over 45 psi, delivering superior reliability, reduced turbulence, and improved coolant flow.

Replaces OEM Part Numbers: 11537848501 & 11537848502. Can be used with your factory connectors.

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Turner Motorsport - Corporate Logo
T#:57543703
Part#: 059198LA03KT
In Stock
New Item
$ 62.99 USD
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Upgrade your cooling system setup with our Heavy Duty Radiator Mounting Brackets, engineered to deliver maximum structural support and a refined engine-bay aesthetic. After decades of heat cycles and hard driving, your E30's factory plastic mounts inevitably become brittle, faded, and prone to cracking, risking damage to your radiator. Our radiator mount upgrade completely replaces those tired OEM units with a high-strength alternative built to handle the rigors of spirited driving, track days, and engine swaps. Whether you are performing a full cooling system refresh or executing an M5X swap that utilizes an E36-style radiator, these brackets provide the ideal balance of precision fitment and rugged dependability.

Crafted with a premium brushed stainless steel finish, this kit does more than secure your radiator; it radically improves the visual appeal under the hood by swapping out cheap, weathered plastic for durable steel hardware. Designed as a true direct bolt-on solution, the brackets align seamlessly with factory mounting locations, eliminating the need for frustrating custom fabrication, cutting, or drilling. They clamp down firmly to eliminate unwanted radiator movement, ensuring your cooling stack remains locked in place under heavy vibration.

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Rein Water Hose With Metal Flange - F-Chassis - N55
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53750147
Part#: CHU0632
In Stock
New Item
$ 52.99 USD
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Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges

Rein Water Hose Problem Solver Kit - F chassis N55
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53750119
Part#: 11537598237
In Stock at Vendor
New Item
$ 26.99 USD
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$ 26.99 USD
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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 Return Line
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53856300
Part#: 11538650087
In Stock
New Item
$ 60.99 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.

Rein Engine Coolant Reservoir - BMW G1X, G3X
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52516268
Part#: EPT0274
Ships in 3 Business Days
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$ 114.99 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 - Corporate Logo
T#:53750144
Part#: CHU0629
In Stock
New Item
$ 56.99 USD
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Upgraded Coolant Hose from Rein Featuring Metal Flanges to Reduce Leaks

Rein Lower Radiator Hose - G30 G11 G14 G15 G16 - N63
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55857776
Part#: 17128602669
In Stock at Vendor
New Item
$ 49.99 USD
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When it comes to keeping your vehicle on the road, a compromised cooling system is a severe vulnerability. Plastic and rubber degrade from constant heat cycling, leading to hairline cracks, swelling, and sudden failure.
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Bosch - Corporate Logo
T#:54744791
Part#: 039202411C
Ships in 1 Business Day
New Item
$ 168.99

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

$ 149.99 USD
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$ 149.99 USD
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Coolant pump for the charge air cooling system.
Genuine BMW - Corporate Logo
T#:55245856
Part#: 0711990XXKTKT
Ships in 1-2 days
New Item
$ 35.31 USD
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Turner Motorsport offers this Genuine BMW Hex Bolt and Washer Kit to keep your chassis maintenance or engine refresh completely up to factory standard.
ECS - Corporate Logo
T#:55497447
Part#: 060105LA01-02
In Stock
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$ 82.99 USD
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$ 82.99 USD
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Upgrading your cooling system or replacing old, brittle rubber hoses? Don't just replace them—upgrade them. This silicone coolant outlet hose from ECS Tuning delivers perfect OEM fitment with superior heat tolerance and a longer service life. Unlike standard rubber, which softens and degrades from constant heat cycles, high-grade silicone is built to last. Give your cooling system the reliability it deserves.

This hose connects the outlet on the thermostat housing to the front of the cylinder head. It replaces OEM BMW part number 11537584549.

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Genuine BMW - Corporate Logo
T#:55245812
Part#: 17227800XKT
In Stock
New Item
$ 24.21 USD
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This Maintenance Seal Kit bundles two high-failure items that should always be replaced anytime the engine oil cooler lines or oil level sensor are disturbed.
Coolant Thermostat - Includes Sealing Gasket
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:54852031
Part#: 028 280 0004
In Stock
New Item
$ 11.99 USD
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This Meyle-Original replacement thermostat is a direct-fit solution designed to maintain a rock-solid, factory-correct 80°C operating temperature.
ECS - Corporate Logo
T#:56327169
Part#: 059178LA01
In Stock
New Item
Sale - Save 9% $ 407.99

This product was last offered at the strikethrough price on
07-23-2026

$ 369.99 USD
Free Shipping
Sale - Save 9%
$ 407.99

This product was last offered at the strikethrough price on
07-23-2026

$ 369.99 USD
Free Shipping

Gen 2 MINI R5X models (R55, R56, R57, R58, R59, R60, and R61 chassis) utilize a closed, highly pressurized cooling system to maintain optimal engine operating temperatures. At the center of this system is the factory plastic expansion tank, which is constantly exposed to high heat cycles, vibration, and chemical-laden antifreeze. Over time, heat and pressure leach the plasticizers from the original material. This degradation causes the tank to turn brittle and yellow, eventually leading to micro-fractures, splitting along the factory blow-molded center seam, or catastrophic connection failure. Because coolant loss under pressure can occur rapidly, a failing stock tank frequently leads to severe overheating issues or unexpected roadside breakdowns.

This ECS Heavy Duty Aluminum Coolant Expansion Tank directly addresses the structural vulnerabilities of the factory unit by replacing molded plastic with a fully TIG-welded 5052 and 6061 aluminum construction. Aluminum eliminates the risk of seam separation, cracking, or heat deformation, providing a permanent solution that withstands continuous pressure and heat without expanding or fatiguing. To ensure precise fitment, the tank was engineered using 3D CAD modeling for a direct, plug-and-play installation in the factory location. No cutting, drilling, or custom bracketry is required to secure the unit.

All hose barbs, bleed points, and sensor ports are CNC-machined to precise tolerances, guaranteeing a leak-free seal with factory quick-disconnect hoses. A precision-threaded cap neck ensures smooth engagement with the expansion tank cap while maintaining an airtight seal against the internal cap O-rings. To simplify routine maintenance, an integrated external sight glass and internal level tab eliminate guesswork, allowing you to check your coolant level at a glance. Finally, the heavy-duty wrinkle black powder coat protects the exterior of the tank from oxidation and engine bay heat while providing a clean, OEM+ appearance.

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Rein Engine Inlet To Changeover Valve Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52903280
Part#: 17128616914
In Stock at Vendor
New Item
$ 45.99 USD
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This Rein Automotive coolant hose is an exact-fit aftermarket solution for the BMW "By-Pass Hose".

Coolant Expansion Tank
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:54959296
Part#: 314 223 0004
In Stock
New Item
$ 75.99 USD
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This Meyle original-quality expansion tank provides a durable, reliable solution to get your cooling system back to performing exactly as it should.
Rein Radiator Expansion Tank Hose - G30 B48 B58
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55821725
Part#: 17125A09423
In Stock
New Item
$ 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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ECS Performance Coolant Outlet Hose Kit - E9X E82/E88 N55
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:55497453
Part#: 060105LA01KT
In Stock
New Item
$ 168.98

This product was last offered at the strikethrough price on
06-30-2026

$ 159.98 USD
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$ 159.98 USD
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The perfect upgrade for the connection between your thermostat and cylinder head. Designed with durable silicone and billet aluminum to greatly outlast the OE rubber-and-plastic combination.

Some of the weakest points in BMW cooling systems can be the OE plastic fittings, which break down from constant temperature changes, softening these components. When this happens, even simply moving the hose slightly could cause the fitting to crack, causing the coolant to leak all over. The ECS design silicone hose with billet aluminum adapter retains OE fitment with superior strength to not only handle the performance, but also stand up to the wear and tear of a daily driver.

Features:

Manufactured from billet 6061-T6 and type III anodized for exceptional durability and corrosion resistance.

Much stronger part than OEM plastic

Will not become brittle and fatigue over time due to thermal cycling. This will prevent the part from breaking during removal and reinstallation.

Constructed of 4-ply reinforced silicone for improved durability over the failure-prone OE rubber hose. Fluorosilicone-lined internal layer for exceptional chemical resistance. Silicone offers reduced thermal conductivity as well as improved resistance to ozone and UV degradation for improved performance and durability. Follows OEM form for perfect fitment. Utilizes OEM O-ring 11537545278 to ensure a proper seal. Replaces Genuine BMW Part Number: 11537584549

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Meyle Coolant Pump Thermostat - 87 Degrees - BMW N47 N57
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:55497457
Part#: 3282280010
In Stock
New Item
$ 35.99

This product was last offered at the strikethrough price on
06-30-2026

$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
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Keep your engine operating in its powerband and prevent performance-robbing heat soak with this replacement coolant thermostat from Meyle. A failing or sticky thermostat can ruin a track day or spirited drive, making a fresh, high-quality replacement essential for keeping your cooling system performing at its peak under heavy load. Engineered for crisp, reliable valve activation, it ensures your cooling system sheds heat efficiently when you are pushing your vehicle to its limits.
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Genuine BMW - Corporate Logo
T#:55317676
Part#: 11531CKT
In Stock
New Item
$ 74.07 USD
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Preventative cooling system maintenance is vital, and this complete hose and clamp overhaul kit is designed to eliminate weak points before they fail.

Electric Water Pump
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:54959291
Part#: 313 220 0018
In Stock
New Item
$ 96.99 USD
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This mechanical water pump from Meyle is engineered to maintain optimal engine temperatures by driving consistent, efficient coolant circulation.
Rein Auxiliary Water Pump - E65 E66 7 Series
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58745797
Part#: 64116922699
Ships in 3 Business Days
New Item
$ 84.99 USD
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Engineered as a direct replacement for failure prone original equipment secondary pumps, this electric water pump ensures steady hot fluid delivery to the heater core regardless of engine RPM. Built with high quality internal bearings, durable motor windings, and high grade composite housings, it withstands continuous thermal cycling and prevents internal electrical failures.
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Rein - Corporate Logo
T#:52903294
Part#: 17129844478
Back Ordered
New Item
$ 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.


Rein Thermostat Assembly - F Chassis, G-Chassis - B48
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53891628
Part#: 11537644811
Ships in 3 Business Days
New Item
$ 322.99

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

$ 288.99 USD
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$ 288.99 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.
Rein Junction Heat Hose - F3x F22 G30 G12 G01 G02 B58
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58563047
Part#: 11538606278
Ships in 3 Business Days
New Item
$ 38.99 USD
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Protect your engine against thermal degradation and maintain precise cooling system pressure with a Rein Heat Exchanger Return Hose. Engineered as a direct fit replacement for failure prone factory coolant lines, this hose routes coolant through the heat exchanger assembly to prevent thermal spikes under heavy load. Manufactured with high grade heat resistant EPDM rubber and OEM style quick connect fittings, it provides exceptional resistance to internal pressure surges, oil exposure, and cracking across high output 3.0L inline six engine bays.
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Rein - Corporate Logo
T#:55965839
Part#: 17138610661
Ships in 3 Business Days
New Item
$ 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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Water Pump Service Kit
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616362
Part#: 1151758692550
Ships in 3 Business Days
New Item
$ 1,264.99 USD
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This CRP/Rein service kit offers an all-in-one overhaul solution designed to restore maximum cooling system integrity.

Rein Lower Radiator Hose - G3x G1x
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58489956
Part#: 17128602613
Ships in 3 Business Days
New Item
$ 44.99 USD
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$ 44.99 USD
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Protect your engine against thermal breakdown and maintain precise cooling system pressure with a Rein Lower Radiator Hose. Engineered as a direct fit replacement for degradation prone factory rubber hoses, this coolant line connects the lower radiator circuit to ensure steady fluid circulation under heavy driving conditions. Manufactured with high grade heat resistant EPDM rubber and OEM style quick connect fittings, it provides exceptional resistance to internal pressure spikes, ozone exposure, and chemical breakdown.
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Rein Turbocharger Coolant Supply Line - BMW B58 Gen2
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58307569
Part#: 11538650086
Ships in 3 Business Days
New Item
$ 72.00 USD
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Supplies coolant to the turbocharger

Water Pump Service Kit
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616366
Part#: 115175869251
Ships in 3 Business Days
New Item
$ 1,326.99 USD
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Refresh your cooling setup with full confidence and protect your investment against heat-induced power loss.
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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Restore your cooling system’s integrity with the Rein CHE0993 Engine Coolant Hose.

Water Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616352
Part#: 17127599452
Ships in 3 Business Days
New Item
$ 63.99 USD
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Rein Automotive cooling hoses are designed as precision OEM-quality replacements that withstand the rigorous demands of hard driving.

Water Pump Service Kit
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616365
Part#: 115175869253
Ships in 3 Business Days
New Item
$ 1,265.99 USD
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Engineered to deliver factory-level reliability, the Rein Electric Water Pump Service Kit is an essential maintenance upgrade for your BMW.
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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The Rein ELC0090 is a critical component for BMW N52-series engines, replacing the often-ignored "angle connector" located beneath the intake manifold.
Rein - Corporate Logo
T#:53820908
Part#: CHE0985
Ships in 3 Business Days
New Item
$ 73.99

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

$ 25.99 USD
$ 25.99 USD
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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Rein - Corporate Logo
T#:58307536
Part#: 17128654824
Ships in 3 Business Days
New Item
$ 26.99 USD
$ 26.99 USD
Prevent catastrophic cooling system failure and maintain optimal system pressure with a Rein Expansion Tank Vent Line. Engineered as a direct fit replacement for brittle factory expansion tank lines, this vent hose routes pressurized coolant vapor from the cylinder head back to the expansion reservoir. Manufactured with durable heat resistant materials and factory style quick disconnect fittings, it ensures a tight seal against pressure drops and prevents fluid loss.
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Auxillary Water Pump - BMW N63 S63
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58818960
Part#: 11515A36581
Ships in 3 Business Days
New Item
$ 93.99 USD
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Pumps coolant to the turbo
Upper Radiator Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58489958
Part#: 17128654834
Ships in 3 Business Days
New Item
$ 65.99 USD
Free Shipping on orders $49 and up
$ 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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Rein - Corporate Logo
T#:55965849
Part#: 11537598865
Ships in 3 Business Days
New Item
$ 79.99 USD
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A malfunctioning or lazy thermostat can lead to poor fuel trim efficiency, sluggish performance, and destructive overheating. This Rein thermostat assembly is engineered as a robust direct replacement for your worn factory unit, ensuring proper coolant regulation through the radiator under heavy loads.
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Rein Additional Water Pump - N63 F Chassis
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58782367
Part#: 64119230237
Ships in 3 Business Days
New Item
$ 92.99 USD
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Engineered as a direct replacement for failure prone original equipment secondary pumps, this electric water pump ensures steady hot fluid delivery to the heater core regardless of engine RPM. Built with high quality internal bearings, durable motor windings, and high grade composite housings, it withstands continuous thermal cycling and prevents internal electrical failures.
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Water Pump Service Kit
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616363
Part#: 115175869259
Ships in 3 Business Days
New Item
$ 1,687.99 USD
Free Shipping on orders $49 and up
Protect your high-performance driving machine from the devastating consequences of thermal overload with the Rein Water Pump Service Kit.

Rein Water Hose With Metal Flange - E70, E71 - N55, N54
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53750149
Part#: CHU0633
Ships in 3 Business Days
New Item
$ 56.99 USD
Free Shipping on orders $49 and up
Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616346
Part#: 17128620944
Ships in 3 Business Days
New Item
$ 43.99 USD
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Keep your European powertrain running at optimal operating temperatures with a high-grade coolant hose replacement.

Coolant Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57086700
Part#: 17137642158
Ships in 3 Business Days
New Item
$ 55.99 USD
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$ 55.99 USD
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The factory expansion tank is one of the most common failure points in modern BMW cooling systems, often failing along seam welds or developing micro-cracks around fluid quick-connect fittings. Replacing a degraded reservoir with this direct-fit Rein expansion tank restores pressure containment, ensures accurate coolant expansion volume, and prevents fluid loss before it turns into severe engine damage.
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Rein Coolant Expansion Tank - With Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53891623
Part#: 17135A6A030C
Ships in 3 Business Days
New Item
$ 99.99 USD
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Replace your old brittle expansion tank
Rein - Corporate Logo
T#:55965843
Part#: 171386106612
Ships in 3 Business Days
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
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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Upper Radiator Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58563050
Part#: 17128602871
Ships in 3 Business Days
New Item
$ 64.99 USD
Free Shipping on orders $49 and up
$ 64.99 USD
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Protect your engine against severe thermal breakdown and maintain precise cooling system pressure with a Rein Primary 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 primary radiator core. 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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Rein - Corporate Logo
T#:58782356
Part#: 17137642158K
Ships in 3 Business Days
New Item
$ 76.99 USD
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Eliminate coolant leaks with this brand new reservoir and cap kit from Rein - integrate coolant level sensor included with the coolant reservoir
Rein Water Hose with Metal Flange - E60, E61 - N54
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53750141
Part#: CHU0460
Ships in 3 Business Days
New Item
$ 52.99 USD
Free Shipping on orders $49 and up
Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges