Find Parts That Fit Your Vehicle

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.

Sub-Categories

Sort By:

URO Premium - Corporate Logo
T#:14587
Part#: 11531722531
In Stock
$ 21.99 USD
Free Shipping on orders $49 and up
$ 21.99 USD
Free Shipping on orders $49 and up
The plastic thermostat cover in your BMW is a known point of failure. Throughout the years of repeated contact with hot coolant, the plastic can crack and cause massive coolant leaks and potential overheating. Eliminate one of the weak links in your cooling system with a replacement aluminum thermostat housing. By installing this aluminum unit, you have no worries as far as plastic housing cracks go. This is the last thermostat housing you will need to put on your vehicle.
Show More Show Less
URO Thermostat Assembly With Aluminum Housing
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:37858365
Part#: 11537509227PRM
In Stock
$ 89.99 USD
Free Shipping on orders $49 and up
$ 89.99 USD
Free Shipping on orders $49 and up
Get rid of the brittle plastic OEM thermostat housing when replacing the thermostat with this Aluminum Housing alternative! Comes with thermostat and gasket.
Aluminum Water Pipe
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587665
Part#: 11537545890
In Stock
$ 27.95

This product was last offered at the strikethrough price on
03-26-2026

$ 27.58 USD
Free Shipping on orders $49 and up
$ 27.58 USD
Free Shipping on orders $49 and up
Connects from the top of the thermostat housing to the engine block

Active Autowerke - Corporate Logo
T#:397222
Part#: 14-009
Ships in 10 Business Days
$ 56.99 USD
Free Shipping on orders $49 and up
Plastic thermostat housing cracked on your M50?

Here are your choices: you can wait for the plastic factory thermostat housing cover to break and cause major overheating. (Even with a new stock cover, it won’t take long.) Or you can install a thoughtfully engineered all-aluminum thermostat housing cover from Active Autowerke and never experience this type of failure again. Currently there is no factory upgraded part to this problem. This is an aluminum extruded part that has all of the openings machine properly to fit like factory; from the mounting bolt holes, the seating of the thermostat to the sealing opening for the ORANGE gasket. Forged to exact factory tolerances, everything fits and this unit is a true easy bolt-on – especially suited for racing or load conditions like heavy traffic, where engine temp can rise rapidly. The housing is guaranteed never to break from overheating or over-tightening, and its CNC machined surface ensures a precise seat.

Unit comes complete with a new ORANGE sealing gasket; a new thermostat is recommended but not included.
For hotter climates, a 71 degree thermostat is recommended over the 82 degree unit.

Anything and everything BMW is the mantra at Active Autowerke. Since 1981 they have been serving the BMW community with custom turbocharger kits to a myriad of other innovative and inspiring performance parts.
Show More Show Less

Cooolant Hose - To Thermostat
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:639505
Part#: 11537598234PRM
In Stock
$ 33.99 USD
Free Shipping on orders $49 and up
URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts. As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform! URO Coolant Hose - This item fits the following BMW Chassis: F22,F30,F32,F33,F34,F36 Fits BMW Engines including: N55
Show More Show Less
Active Autowerke - Corporate Logo
T#:397219
Part#: 14-010
In Stock
5% off MSRP $ 259.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 246.99 USD
Free Shipping
5% off MSRP
$ 259.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 246.99 USD
Free Shipping

When you push your powerplant, thermodynamics push right back. The toll of high performance is higher heat load – and many stock components begin to complain. But Active Autowerke has you covered - this upgraded fan clutch increases viscous coupling of cooling fan blade speed to water pump speed, yielding increased airflow through the radiator for more efficient cooling. A simple, yet wonderful, thing.

This product fits the following BMWs:
1992-1999 E36 323i 325i 328i 330i M3
1998-2006 E46 323i 325i 328i 330i M3

Show More Show Less

Uro Premium Aluminum Water Pipe - E46 E53 E83 M54 xDrive
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:380523
Part#: 11537502000
In Stock
$ 82.99

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

$ 70.99 USD
Free Shipping
$ 70.99 USD
Free Shipping

The stock plastic water pipe is prone to cracking after a long life of heating and cooling cycles. This could lead to coolant loss and an overheating engine. To prevent this, the URO Premium water pipe is constructed from aluminum that can withstand as many heating and cooling cycles that could ever be thrown at it and won't crack or become brittle over time.

Fits the following BMWs:
2000-2005 E46 BMW M54 xi models
2000-2006 E53 BMW X5 M54 xi/xDrive models
2004-2006 E83 BMW X3 M54 xi/xDrive models

Show More Show Less
URO Premium - Corporate Logo
T#:639535
Part#: 11537591889PRM
In Stock
$ 32.99 USD
Free Shipping on orders $49 and up
Your factory thermostat to cylinder head coolant hose comes with a plastic connector, which is often referred to as a "Mickey Mouse" connector, that is known to fail at the mounting tabs. This can allow the coolant hose to come free from the cylinder head and cause major coolant loss. Replace your hose and connector with this URO Premium hose to eliminate this point of failure and prevent coolant loss and overheating.
Show More Show Less

URO Premium Aluminum Water Pipe - BMW M52TU M54
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587659
Part#: 11537502525PRM
In Stock
$ 71.99 USD
Free Shipping
$ 71.99 USD
Free Shipping
This plastic coolant water pipe connects the expansion tank return hose with the engine block

URO Coolant Hose Flange - E90 335d E70 X5 xDrive35d
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:50031909
Part#: 11127806196-PRM
Back Ordered
$ 40.99 USD
Free Shipping on orders $49 and up
Upgraded flange constructed with aluminum instead of failure-prone plastic.
Uro - Aluminum Coolant Hose Connector for E9x, and Z4
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:37757289
Part#: 11537545890PRMK
In Stock
$ 24.99 USD
Free Shipping on orders $49 and up
Aluminum Connector that replaces the OEM brittle Plastic
URO Premium - Corporate Logo
T#:639489
Part#: 11537584549PRM
In Stock
$ 32.99 USD
Free Shipping on orders $49 and up
If your coolant hose is leaking, replace it with this URO Premium hose to prevent further coolant loss and overheating.


Thermostat Housing - Aluminum
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587660
Part#: 11537512733-PRM
Ships in 2 Business Days
$ 30.99 USD
Free Shipping on orders $49 and up
Metal version of the plastic thermostat housing
Uro Premium Collapsible Water Pipe Kit - N73 N74 6.0L
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:383328
Part#: 11147500355
Ships in 2 Business Days
$ 421.99 USD
Free Shipping
$ 421.99 USD
Free Shipping

The N73/74 V12 engine water pipes could often fail at lower mileages, leaking a ton of coolant and prevent coolant flow to the rear of the engine block. If not addressed immediately, this could lead to engine overheating and complete failure. Unfortunately, these pipes are also very expensive and time consuming to replace when using the stock water pipe due to the amount of labor time needed for tear down and installation. This URO Premium collapsible water pipe kit is the perfect replacement to cut down on installation time by removing the need to tear down the front end of the engine before installing this part, potentially saving you thousands of dollars at a shop or a ton of hours in your own garage. 

Fits the following BMW engines:
N73, N74

Show More Show Less
Coolant Hose - Cylinder Head to T-Stat Housing
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587667
Part#: 11537552339PRM
Ships in 2 Business Days
$ 27.99 USD
Free Shipping on orders $49 and up
Replace your leaking coolant hose

URO Premium - Corporate Logo
T#:180693
Part#: 11141439975R
In Stock
$ 300.67 USD
Free Shipping
$ 300.67 USD
Free Shipping
NOW LOCATED UNDER T#338249

Active Autowerke - Corporate Logo
T#:2302749
Part#: 14-016
Ships in 10 Business Days
$ 141.99 USD
Free Shipping
$ 141.99 USD
Free Shipping
CNC machined coolant/water thermostat bypass tube to improve flow on and off the track. Easy plug and play installation and a durable anodized coating make this a simple and reliable temperature control solution.
Show More Show Less
Heavy Duty Coolant Outlet Hose - With Aluminum Adapter
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587662
Part#: 11537541992A
Ships in 2 Business Days
$ 26.03 USD
Free Shipping on orders $49 and up
Attached to the outlet on the thermostat housing

URO Coolant Hose - 11537603514
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:28171566
Part#: 11537603514PRM
In Stock
$ 20.99 USD
Free Shipping on orders $49 and up

Upgrade your thermostat to engine cooling hose with this premium unit from URO Parts, featuring an aluminum "Mickey Mouse" flange for enhanced durability compared to the factory plastic unit.

Key Features:

Metal connector for improved durability over OEM plastic connectors Molded to OE coolant hose shape for perfect fitment Engine heat and ozone-resistant Durable ECD-resistant EPDM material prevents rubber breakdown from electrolysis Temperature rating from -40º F to 275º F (-40º C to 135º C)

Show More Show Less
BMW Brass Coolant Bleeder Screw - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587673
Part#: 17111712788PRM
In Stock
$ 5.35 USD
Free Shipping on orders $49 and up
Having an operational bleeder screw for your coolant system assures that when service is performed, all air pockets are removed. Having air pockets in your coolant system prevents your system from functioning properly. Your heat may not work as well and there is the potential for engine overheating if the air pocket is trapped behind the thermostat. Be sure that all of the air is bled out of your system with a new bleeder screw.
Show More Show Less

Brass Drain Plug
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587674
Part#: 17117530902
In Stock
$ 6.99 USD
Free Shipping on orders $49 and up
Used to drain the radiator

Silicone Coolant Pipe Repair Kit
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:554118
Part#: 11537516414
In Stock
$ 14.99 USD
Free Shipping on orders $49 and up
Subject to the ravages of heat cycling during each driving cycle - rubber hoses are more susceptible to wear and fatigue than aluminum piping. BMW utilized a single part number for their aluminum pipe and hose combination - making this part typically over $100 to replace. Rein to the rescue! By supplying just the rubber component, repairs can be made quickly and cost effectively (and without the waste of scraping a perfectly good aluminum pipe!) Includes both hose clamps and rubber hose.
Show More Show Less
URO Premium - Corporate Logo
T#:639614
Part#: 11537560363PRM
In Stock
$ 31.99

This product was last offered at the strikethrough price on
05-03-2026

$ 27.99 USD
Free Shipping on orders $49 and up
$ 27.99 USD
Free Shipping on orders $49 and up
Eliminate leaks and replace the faulty stock plastic connector with a metal upgrade
Breather Tube - Aluminum
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:31622548
Part#: 17127515502-PRM
In Stock
$ 24.99 USD
Free Shipping on orders $49 and up


Silicone Coolant Pipe Repair Kit
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587668
Part#: 11537558522
In Stock
$ 15.99 USD
Free Shipping on orders $49 and up
Attached to the water pump inlet
URO Premium - Corporate Logo
T#:639581
Part#: 11537581063PRM
In Stock
$ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 28.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 32.99

This product was last offered at the strikethrough price on
05-03-2026

$ 28.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts. As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform! This item fits the following BMW Chassis: F10 Fits BMW Engines including: N52N
Show More Show Less
Cooling Fan Resistor Repair Upgrade Kit
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587697
Part#: 17117541092R
Ships in 2 Business Days
$ 38.99 USD
Free Shipping on orders $49 and up
Low speed fan resistor

Coolant Pipe W/ O-ring - Metal
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:39059283
Part#: 11537589713-PRM
Ships in 2 Business Days
$ 145.99

This product was last offered at the strikethrough price on
08-27-2026

$ 129.99 USD
Free Shipping on orders $49 and up
$ 129.99 USD
Free Shipping on orders $49 and up

URO Premium - Corporate Logo
T#:2369
Part#: 11531720173
Ships in 2 Business Days
$ 11.00 USD
Free Shipping on orders $49 and up

This aluminum thermostat housing cover is a direct replacement for the factory unit. It fits BMW E32 740i 740il E34 530i 540i E38 740i 740il 1995, E31 840i thru 1995.

With more than 4,000 European vehicle replacement parts, URO is no stranger to the market. Superior metal stock and extremely strict quality control are at the forefront of URO’s agenda and it shows as they become the OE supplier for more and more car companies every single day.


This item fits the following BMWs:
1993-1995 E34 BMW 530i 540i
1988-1994 E32 BMW 740i 740il
1995-2001 E38 BMW 740i 740il
1990-1999 E31 BMW 840i 840ci

Show More Show Less
Active Autowerke - Corporate Logo
T#:5886968
Part#: 15-012
Ships in 3 Business Days
$ 2,849.99 USD
Free Shipping
$ 2,849.99 USD
Free Shipping
BMW's S55 motor is a modern marvel but one weak point, which Active identified is the entire cooling system for the intake which comprises the charge pipe, the aftercooler and the heat exchanger (or radiator). Finally there is a S55 aftercooler kit upgrade that is good enough to carry the Active Autowerke brand. Years of success in developing cars for motorsport has allowed Active to leverage its expertise to the top-mount charge air cooler on the F80 M3, F82 M4 and F87 M2 Competition. This aftercooler was made for the S55 and crafted using only high-grade aluminum to outperform the factory aftercooler in all situations from everyday driving to the toughest racing. The factory cooler was built to support a specific power target and environment. Many of you have increased the performance of the S55 which quickly overwhelms the stock cooler leading to heat soak and higher intake air temperatures which triggers the ECU to downgrade the performance until cooler air returns. Active's focus was not on a mass-market aesthetic add-on but a properly engineered improvement over the existing hardware. Active uses a tube-and-fin core designed specifically for the S55 and included turbulators to maximize the cooling efficiency in as small a package as possible. The end tanks are billet machined aluminum, not cast, folded, or bonded and ensure even distribution of the water throughout the internal aftercooler cores. High precision fittings, CNC machining, and TIG welding throughout ensures the highest quality construction to prevent pressure loss, and the lowest weight, in a bolt-on replacement. But Active also didn’t leave the aesthetics by the wayside as we dip the visible top of the aftercooler in a carbon fiber coating giving your installed cooling system a decidedly top market look to match the improved cooling performance. The Active silicone charge pipes for the F80 M3, F82/F83 M4 and the F87 M2 Competition improve the flow over the stock, compressed plastic pipes. The Active Silicone Charge Pipes allow you to maximize power on your F8X by securing all the boost that your S55 is making. These pipes replace the hot-side pipes leaving the turbos and into the top-mount aftercooler. The stock S55 charge pipes are notorious for developing hairline fractures at their plastic seams. These fractures or cracks are unnoticeable to the naked eye, but under boost pressure they open up leaking the desired charged air into the engine bay, and consequently can rob your S55 of it's full power potential. In addition, these leaks can trigger your S55's turbochargers to work harder to hit and maintain target boost pressure, potentially wearing them out sooner. Active uses silicone in this area because it will not contribute to heat soak and it's easier to mold for the correct clearances. Active uses a 5-layer silicone hose with all needed adapters and stainless hose clamps included. It fits perfectly with our CNC’d top-mount cooler.
Show More Show Less

Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:18468308
Part#: 11537566329PRM
Ships in 2 Business Days
$ 28.99 USD
Free Shipping on orders $49 and up
Water Pump To Thermostat Hose
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587666
Part#: 11537550062
Ships in 2 Business Days
$ 28.99 USD
Free Shipping on orders $49 and up
Replace your leaking hose

URO Cooling Hose - BMW F25 N20 2.0L
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:592949
Part#: 11537592095
Ships in 2 Business Days
$ 33.99 USD
Free Shipping on orders $49 and up

URO Cooling Hose - BMW F25 N20 2.0L

The URO Cooling Hose - BMW F25 N20 2.0L is a high-performance replacement part designed to keep your engine's cooling system functioning efficiently. This hose is specifically engineered for the BMW F25 with the N20 2.0L engine, offering a reliable solution to prevent coolant leaks and maintain optimal engine temperatures. Replacing a worn or damaged cooling hose ensures a consistent flow of coolant, improving engine performance and preventing overheating. Crafted from durable materials, this cooling hose guarantees long-lasting use, protecting critical engine components from damage.

  • Designed specifically for BMW F25 with N20 2.0L engine
  • Prevents coolant leaks and maintains optimal engine temperature
  • Ensures reliable coolant flow for improved engine performance
  • High-quality construction for long-lasting durability
  • Prevents engine overheating and protects critical components
  • Easy to install with a direct OE-style fit
Show More Show Less

Connection Piece - Aluminum
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587700
Part#: 17127515494-PRM
Back Ordered
$ 11.00 USD
Free Shipping on orders $49 and up
Attaches multiple coolant hoses into the heater core
Coolant Hose - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:590201
Part#: 11537580969
Ships in 2 Business Days
$ 25.99 USD
Free Shipping on orders $49 and up
aluminum Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587663
Part#: 11537544638PRM
Ships in 2 Business Days
$ 26.99 USD
Free Shipping on orders $49 and up
Coolant hoses can crack and leak after long term exposure to engine heat. This is a replacement for the coolant hose that comes off of the thermostat. Metal Connector vs OEM Plastic Connector Plastic gets brittle from heat cycles and cracks or breaks Molded to OE coolant hose shape for superb fitment Engine heat and ozone resistant Durable ECD (Electro Chemical Degradation)-resistant EPDM material helps prevent electrolysis from breaking down the rubber from the inside-out Temperature rating: -40º F to 275º F (-40º C to 135º C)
Show More Show Less