URO BMW Cooling System Parts & Accessories for BMW Z Series E85/6 (2003-2008)

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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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Radiator Adjustment Screw / Drain Plug
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T#:37959694
Part#: 17107523260
In Stock
$ 56.99 USD
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Constructed from high-strength, heat-resistant plastic, this component is designed to endure extreme temperatures and fluctuating pressure levels, ensuring the cooling system functions optimally and maintains peak efficiency.
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BMW Water Pump - Remanufactured - 11517527799
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T#:372932
Part#: 11517527799
In Stock
$ 42.99 USD
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Features a metal impeller for reliability
URO Thermostat - E60, E61, E82, E83, E88, E90, E91, E92, E93, Z4 ...
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T#:591812
Part#: 11537549476
In Stock
$ 74.99 USD
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Restore proper function to your cooling system

URO - Heater Inlet Pipe - E46, Z3, E39
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T#:34080697
Part#: 11531705210
In Stock
$ 34.49 USD
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This runs from the front left side of the cylinder head under the intake manifold toward the firewall.

Coolant Expansion Tank
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T#:363421
Part#: 17117573751
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$ 64.99 USD
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$ 64.99 USD
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Does not include cap or coolant level sensor
URO Water Pump - BMW N52 3.0L
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T#:39768338
Part#: 11517586925
In Stock
$ 296.99 USD
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If your engine is over heating or you have noticed coolant loss, there is a chance your water pump has failed. This URO replacement is a great option to get your BMW back on the road without breaking the bank.
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Expansion Tank Retaining Plate
For vehicles with automatic transmission only
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T#:362912
Part#: 17111436251
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$ 53.99 USD
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$ 53.99 USD
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Mounts to the side of the radiator for retaining the expansion tank
Water Connector - Expansion Tank To Trans Oil Cooler - E83 Z4 ...
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T#:50031879
Part#: 17112248409
Ships in 2 Business Days
New Item
$ 40.99 USD
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Plastic cooling system components degrade and become brittle with age and heat exposure. This particular part is especially prone to damage during expansion tank removal. Always inspect it whenever the expansion tank is removed and replace it if any cracking or wear is found.
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Radiator Drain Plug
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T#:380524
Part#: 17111437361
In Stock
$ 3.99 USD
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Usually stripped out after being removed

URO Parts Thermostat Assembly - 11537509227
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T#:29466801
Part#: 11537509227
In Stock
$ 41.99 USD
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$ 41.99 USD
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The thermostat cover in your BMW, made from plastic, is notorious for failing. After years of exposure to hot coolant, the plastic can crack, leading to significant coolant leaks and potential engine overheating.

URO Parts offers a superior solution with their high-quality thermostat cover, designed to surpass the durability of the original factory part. This replacement thermostat comes complete with a gasket for an effortless service.

Features:

Perfect Fit: Guaranteed fitment ensures a seamless replacement process. Optimal Cooling: High-flow OE-style design ensures efficient engine cooling performance. Easy Installation: Manufactured to factory housing dimensions for straightforward bolt-on installation and secure hose connections. Comprehensive Design: Includes ports for temperature sensors where applicable. Superior Materials: Constructed from high-quality alloy or composite materials that resist temperature-induced warping or cracking, preventing coolant leaks. URO Parts, with over 8,000 premium spare parts, specializes in manufacturing precise, durable replacements for factory BMW components. Committed to the highest standards of precision, materials, and workmanship, each part is rigorously tested to deliver the best combination of durability, functionality, and affordability. For reliable replacement parts that offer great value, choose URO Parts.

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Radiator Drain Plug (Adjustment Screw) - Priced Each
For vehicles with manual transmission only
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T#:593031
Part#: 17111437359
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$ 8.99 USD
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$ 8.99 USD
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This is the drain plug (adjustment screw) for manual transmission equipped cars.
URO Coolant Hose - BMW E60 E61 E83 N52
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T#:639219
Part#: 11537519494
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$ 20.99 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.
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URO Thermostat Housing Gasket - BMW M52TU M54
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T#:639269
Part#: 11537509357
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$ 2.99 USD
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Prevent leaks with a brand new thermostat housing gasket from URO
Expansion Tank Mounting Clamp
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T#:591954
Part#: 17111707777
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$ 6.99 USD
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Locks the expansion tank into the mounting plate via the large hole in the bottom of the tank
URO Radiator Mounting Plate for Expansion Tank - Z4
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T#:639486
Part#: 17112248408
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$ 69.99 USD
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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 Mounting Plate - This item fits the following BMW Chassis: E85,E86 Fits BMW Engines including: M54,N52
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Radiator Carrier - Right
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T#:593028
Part#: 17107524914
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$ 49.99 USD
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Plastic side frame for radiator

URO Coolant Pipe O-Ring - BMW N52 3.0L
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T#:37892133
Part#: 11517514942
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$ 2.09 USD
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URO Coolant Pipe O-Ring - BMW N52 3.0L

Engineered to meet OE coolant pipe o-ring dimensions, the URO Coolant Pipe O-Ring ensures easy installation and a perfect fit for BMW N52 3.0L engines. It is designed to resist cooling system heat and antifreeze, providing reliable performance under demanding conditions. Constructed from durable ECD (Electro Chemical Degradation)-resistant EPDM material, it helps prevent electrolysis, extending the lifespan of your cooling system. With a temperature rating of -40º F to 275º F (-40º C to 135º C), this o-ring is built to withstand extreme temperatures. Supported by a 24-month unlimited mileage warranty, it is a dependable solution for maintaining your BMW’s cooling system efficiency.

Key Benefits:

  • Precision-molded to OE dimensions for easy installation and perfect fit.
  • Resists cooling system heat and antifreeze for reliable performance.
  • Durable ECD-resistant EPDM material prevents electrolysis.
  • Temperature rating of -40º F to 275º F for extreme condition durability.
  • Includes a 24-month unlimited mileage warranty for peace of mind.
  • Specifically designed for BMW N52 3.0L engines.
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URO Radiator Mounting Bracket - E46 Z4
Right Lower
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T#:593030
Part#: 17111436264
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$ 9.99 USD
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$ 9.99 USD
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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.
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Radiator Drain Plug With Housing
For vehicles with automatic transmission only
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T#:593032
Part#: 17111437360
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$ 10.99 USD
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$ 10.99 USD
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This is the drain plug (adjustment screw) for automatic transmission equipped cars.