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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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Rein - Corporate Logo
T#:53750147
Part#: CHU0632
In Stock at Vendor
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
Rein - Corporate Logo
T#:53750144
Part#: CHU0629
In Stock at Vendor
New Item
$ 56.99 USD
Free Shipping on orders $49 and up
Upgraded Coolant Hose from Rein Featuring Metal Flanges to Reduce Leaks
Rein - Corporate Logo
T#:53856300
Part#: 11538650087
In Stock at Vendor
New Item
$ 60.99 USD
$ 60.99 USD
Rein Automotive turbo hoses are engineered to meet these rigorous demands, providing the reliability required for both the track and the street.

Rein - Corporate Logo
T#:49404665
Part#: 11428583901
In Stock
New Item
$ 408.99 USD
Free Shipping on orders $49 and up
For those who push their engines to the limit, "good enough" is a liability. Upgrade to the Rein HEU0116 Aluminum Oil Filter Housing—the professional’s choice for durability and peace of mind.

Rein - Corporate Logo
T#:52903280
Part#: 17128616914
In Stock
New Item
$ 45.99 USD
Free Shipping on orders $49 and up
This Rein Automotive coolant hose is an exact-fit aftermarket solution for the BMW "By-Pass Hose".
Vargas Turbo Technologies - Corporate Logo
T#:51848510
Part#: VTT-B58-RHKBLUE
In Stock
New Item
$ 389.99 USD
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$ 389.99 USD
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Engineered for the BMW enthusiast who demands form and function, the VTT Radiator Hose Kit is the ultimate preventative maintenance upgrade.

Rein - Corporate Logo
T#:53750119
Part#: 11537598237
Ships in 4 Business Days
New Item
$ 26.99 USD
Free Shipping on orders $49 and up
$ 26.99 USD
Free Shipping on orders $49 and up
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
Rein - Corporate Logo
T#:53820908
Part#: CHE0985
Ships in 4 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#:52516262
Part#: CHE0993
Back Ordered
New Item
$ 64.99 USD
Free Shipping on orders $49 and up
Restore your cooling system’s integrity with the Rein CHE0993 Engine Coolant Hose.

Rein - Corporate Logo
T#:52516266
Part#: ELC0090
Ships in 4 Business Days
New Item
$ 69.99 USD
Free Shipping on orders $49 and up
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#:55965839
Part#: 17138610661
Ships in 4 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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Rein - Corporate Logo
T#:53891623
Part#: 17135A6A030C
Ships in 4 Business Days
New Item
$ 99.99 USD
$ 99.99 USD
Replace your old brittle expansion tank


CSF - Corporate Logo
T#:54388384
Part#: 3430
In Stock
New Item
$ 202.99 USD
Free Shipping on orders $49 and up
$ 202.99 USD
Free Shipping on orders $49 and up
Keep your MINI’s engine operating at peak performance with this premium aluminum radiator upgrade. Designed to work flawlessly with your factory water pump, this unit maximizes thermal heat transfer by circulating coolant through an optimized horizontal core, utilizing advanced fin architecture to shed heat rapidly. It drops directly onto your factory core support rubber mounts and connects seamlessly to your upper and lower radiator hoses.
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Rein - Corporate Logo
T#:52516268
Part#: EPT0274
Back Ordered
New Item
$ 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#:55965843
Part#: 171386106612
Ships in 4 Business Days
New Item
$ 49.99 USD
$ 49.99 USD
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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CSF Universal Large Single-Pass Oil Cooler - Universal Application ...
Universal fitment design - modifications may be necessary to run this cooler
CSF - Corporate Logo
T#:53608839
Part#: 8371
Ships in 4 Business Days
New Item
$ 499.00 USD
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$ 499.00 USD
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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.
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Rein - Corporate Logo
T#:53750149
Part#: CHU0633
Ships in 4 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
Rein - Corporate Logo
T#:52903294
Part#: 17129844478
Back Ordered
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
Upgrade your cooling system with the Rein Automotive replacement coolant hose, engineered to meet or exceed the rigorous standards of your BMW.

Rein - Corporate Logo
T#:53891628
Part#: 11537644811
Ships in 4 Business Days
New Item
$ 322.99

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

$ 288.99 USD
$ 288.99 USD
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 - Corporate Logo
T#:55821725
Part#: 17125A09423
Ships in 4 Business Days
New Item
$ 18.99 USD
Free Shipping on orders $49 and up
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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Rein - Corporate Logo
T#:53750141
Part#: CHU0460
Ships in 4 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

Rein - Corporate Logo
T#:55857776
Part#: 17128602669
Ships in 4 Business Days
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
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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Vargas Turbo Technologies - Corporate Logo
T#:51848504
Part#: VTT-B58-CEBLUE
Ships in 10 Business Days
New Item
$ 59.99 USD
Free Shipping
$ 59.99 USD
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Elevate your BMW's engine bay while safeguarding your cooling system with the VTT B58 Expansion Tank Hose in Blue.
Vargas Turbo Technologies - Corporate Logo
T#:51813338
Part#: VTT-N54-CAO
Ships in 10 Business Days
New Item
$ 31.99 USD
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$ 31.99 USD
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Engineered for high-performance BMW builds, the Vargas Coolant Adapter replaces the weak factory plastic neck located at the front of the cylinder head.


Vargas Turbo Technologies - Corporate Logo
T#:52164959
Part#: S65COUPRABLK
Ships in 10 Business Days
New Item
$ 179.99 USD
Free Shipping
$ 179.99 USD
Free Shipping
The VTT Billet/Silicone Upper Radiator Hose is the only solution on the market that addresses both the hose material and the connector integrity simultaneously.
Rein - Corporate Logo
T#:55965849
Part#: 11537598865
Ships in 4 Business Days
New Item
$ 75.99 USD
$ 75.99 USD
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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Vargas Turbo Technologies - Corporate Logo
T#:52129740
Part#: N54COOLFBO
Ships in 10 Business Days
New Item
$ 354.99 USD
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$ 354.99 USD
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The VTT N54 Full Coolant Hose Kit replaces your entire aging coolant hose network with high-performance silicone alternatives.

Vargas Turbo Technologies - Corporate Logo
T#:52164878
Part#: N54CLRADUBLKO
Ships in 10 Business Days
New Item
$ 139.99 USD
Free Shipping
$ 139.99 USD
Free Shipping
The Vargas Turbo Technologies (VTT) N54 Upper Radiator Hose is a heavy-duty cooling upgrade designed specifically for high-performance BMW N54 engines.

Vargas Turbo Technologies - Corporate Logo
T#:52129741
Part#: N54COOLHBO
Ships in 10 Business Days
New Item
$ 74.99 USD
Free Shipping
$ 74.99 USD
Free Shipping
The VTT N54 Billet/Silicone Cylinder Head Outlet Hose, commonly referred to as the "Mickey Mouse" hose, is a vital upgrade for the BMW N54 engine.
Vargas Turbo Technologies - Corporate Logo
T#:52164880
Part#: N54CLVTBLKO
Ships in 10 Business Days
New Item
$ 54.99 USD
Free Shipping
$ 54.99 USD
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The VTT N54 Upper Vent Hose is a critical upgrade for any BMW enthusiast looking to eliminate the weakest links in their cooling system.

Vargas Turbo Technologies - Corporate Logo
T#:52129739
Part#: VTTN54CLADOEM
Ships in 10 Business Days
New Item
$ 19.99 USD
Free Shipping
$ 19.99 USD
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Address the weakest link in your N54 cooling system with the Vargas Turbo Technologies Billet Cylinder Head Outlet Adapter.
Vargas Turbo Technologies - Corporate Logo
T#:52129742
Part#: VTTN54CLOWBLKO
Ships in 10 Business Days
New Item
$ 127.99 USD
Free Shipping
$ 127.99 USD
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The VTT Upgraded Silicone Lower Radiator Hose for the N54 engine is the perfect preventive maintenance item for any BMW owner.

Vargas Turbo Technologies - Corporate Logo
T#:52129743
Part#: N54COOLRADBLKO
Ships in 10 Business Days
New Item
$ 249.99 USD
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$ 249.99 USD
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The VTT Billet/Silicone Radiator Hose Kit is a heavy-duty cooling upgrade designed specifically for the BMW N54 engine.

Vargas Turbo Technologies - Corporate Logo
T#:51848508
Part#: VTT-B58-LRHBLK
Ships in 10 Business Days
New Item
$ 222.99 USD
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$ 222.99 USD
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The VTT Billet/Silicone Lower Radiator Hose is a professional-grade replacement for the factory B58 Gen 1 lower radiator line.
Vargas Turbo Technologies - Corporate Logo
T#:52164901
Part#: S58CLPRESAD
Ships in 10 Business Days
New Item
$ 39.99 USD
Free Shipping
$ 39.99 USD
Free Shipping
Protect your high-horsepower S58 build with the VTT S58 Coolant Pressure Sensor Adaptor.
Vargas Turbo Technologies - Corporate Logo
T#:52164956
Part#: S65COPUBLK
Ships in 10 Business Days
New Item
$ 104.99 USD
Free Shipping
$ 104.99 USD
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Prevent a roadside breakdown with the VTT Billet/Silicone S65 Water Pump Vent Hose, the ultimate maintenance upgrade for your BMW E9X M3.


Vargas Turbo Technologies - Corporate Logo
T#:51918881
Part#: VTT-COOLADBLUE
Ships in 10 Business Days
New Item
$ 31.99 USD
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$ 31.99 USD
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The Vargas Billet Cylinder Head Outlet Adapter is the definitive solution for one of the most common failure points in BMW N54 and N55 engines.
Vargas Turbo Technologies - Corporate Logo
T#:52657001
Part#: G8XCFHKBLK
Ships in 10 Business Days
New Item
$ 899.99 USD
Free Shipping
$ 899.99 USD
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Elevate the visual appeal and long-term durability of your S58 engine bay with the VTT Silicone Full Coolant Hose Kit.
Vargas Turbo Technologies - Corporate Logo
T#:52164954
Part#: S65COOLHEATBLK
Ships in 10 Business Days
New Item
$ 127.99 USD
Free Shipping
$ 127.99 USD
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Upgrade your BMW M3’s engine bay while simultaneously reinforcing your cooling system with the VTT Billet/Silicone Heater Return Pipe Hose.

Vargas Turbo Technologies - Corporate Logo
T#:52164951
Part#: S65COOLFULLBLK
Ships in 10 Business Days
New Item
$ 524.99 USD
Free Shipping
$ 524.99 USD
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Upgrade your BMW E9X M3’s engine bay and cooling reliability simultaneously with the Vargas Turbo Technologies S65 Billet/Silicone Full Hose Kit.

Vargas Turbo Technologies - Corporate Logo
T#:52094570
Part#: VTT-FAB-041-P
Ships in 10 Business Days
New Item
$ 39.99 USD
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$ 39.99 USD
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The VTT-FAB-041-P is a precision-engineered solution for enthusiasts and builders fabricating custom turbo kits for S58 engines.
Vargas Turbo Technologies - Corporate Logo
T#:52094575
Part#: VTT-FAB-047
Ships in 10 Business Days
New Item
$ 21.99 USD
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$ 21.99 USD
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When building a custom turbo kit, the "VTT-FAB-047" Block-Off Flange is an essential component for managing your BMW's thermal systems.

Vargas Turbo Technologies - Corporate Logo
T#:51918879
Part#: VTT-COOLADBLK
Ships in 10 Business Days
New Item
$ 31.99 USD
Free Shipping
$ 31.99 USD
Free Shipping
The Vargas Billet Cylinder Head Outlet Adapter is the definitive solution for one of the most common failure points on the BMW N54 and N55 engines.
Vargas Turbo Technologies - Corporate Logo
T#:52164960
Part#: S65COUVHBLK
Ships in 10 Business Days
New Item
$ 74.99 USD
Free Shipping
$ 74.99 USD
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This VTT kit provides a permanent fix by utilizing heavy-duty silicone and anodized billet aluminum ends.

Vargas Turbo Technologies - Corporate Logo
T#:52164906
Part#: S58CLPRESCK
Ships in 10 Business Days
New Item
$ 139.99 USD
Free Shipping
$ 139.99 USD
Free Shipping
Protect your investment with the Vargas Turbo Technologies S58 Coolant Pressure Sensor Kit.

Rein - Corporate Logo
T#:55965845
Part#: 11537586784
Ships in 4 Business Days
New Item
$ 85.99 USD
Free Shipping on orders $49 and up
Maintain exact control over your N55’s operating temperatures under demanding street and track conditions with this Rein replacement thermostat unit. Engineered to match factory standards, this complete housing and thermostat assembly ensures your cooling system handles thermal loads flawlessly to prevent heat soak or dangerous overheating.
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Vargas Turbo Technologies - Corporate Logo
T#:51848505
Part#: VTT-B58-CFHKRED
Ships in 7 Business Days
New Item
$ 559.99 USD
Free Shipping
$ 559.99 USD
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Protect your investment with the VTT Full Coolant Hose Upgrade Kit, specifically engineered for the BMW B58 engine.
Vargas Turbo Technologies - Corporate Logo
T#:52164958
Part#: S65RHKBLK
Back Ordered
New Item
$ 314.99 USD
Free Shipping
$ 314.99 USD
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The VTT S65 Radiator Hose Kit is the premier cooling system upgrade for the BMW E9X M3.


Vargas Turbo Technologies - Corporate Logo
T#:52094566
Part#: VTTFAB040BLKB58
Ships in 10 Business Days
New Item
$ 31.99 USD
Free Shipping
$ 31.99 USD
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Engineered for precision and durability, the VTT-FAB-040 B58 Block-Off Flange is the definitive solution for managing oil and coolant paths during fabrication.
Vargas Turbo Technologies - Corporate Logo
T#:52164955
Part#: S65COLLOWBLK
Ships in 10 Business Days
New Item
$ 179.99 USD
Free Shipping
$ 179.99 USD
Free Shipping
Designed for the S65 V8 engine, the VTT Lower Radiator Hose upgrade addresses the common maintenance headaches associated with aging BMW cooling systems.