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URO 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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Engine Fan - 11 Blades, 420mm - Many 6 Cylinders
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T#:1287
Part#: 11521712058
In Stock
$ 32.19 USD
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This fan is driven by the serpentine belt, engaged by the fan clutch. If you have bad motor mounts, it's quite common for the blades of this fan to make contact with the radiator or radiator shroud, essentially self-destructing the fan into many peices. Be sure to get a new fan clutch, while you are replacing this. 
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 fan fits many 6 cylinder BMWs, including the following:

1989-1994 E32 735i/iL
1991-1995 E34 525i, 535i, M5
1992-1999 E36 3 series with 6 cylinder engine (M3, 325, 328, 323)
1997-2002 Z3 2.3, 2.5, 2.8, 3.0, and MZ3 3.2 (S52)
1997-2003 E39 5 series, 525i, 528i, 530i
1999-2000 E46 3 series 323i/Ci, 328i/Ci
2001-2005 E46 3 series WITH AUTOMATIC TRANSMISSION ONLY
2001-2006 E46 M3 (all):
2001-2006 X5 3.0i
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URO Radiator Fan Clutch
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T#:362006
Part#: 11527505302
In Stock
$ 72.99 USD
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$ 72.99 USD
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Common source of engine overheating
Radiator Fan Clutch
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T#:373088
Part#: 11527831619
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$ 71.83 USD
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Direct replacement

URO Coolant Expansion Tank - E30 325e 325i 88-91
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T#:2453609
Part#: 17111712641
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$ 46.99 USD
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$ 46.99 USD
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This coolant reservoir is for the E30 325i 1988-1991. We have found that the expansion tanks should be replaced based on age as well as condition. This item fits the following BMWs: 1988-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
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Radiator Fan Switch
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T#:361996
Part#: 61311378073
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$ 26.44 USD
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$ 26.44 USD
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Measures radiator air temperature enabling the fan to turn off or on
BMW E46 M3 S54 3.2L Water Pump
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T#:378573
Part#: 11517838159
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$ 105.79 USD
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$ 105.79 USD
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Includes sealing gaskets

BMW N55 3.0L Thermostat Assembly
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T#:637725
Part#: 11537598865
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$ 83.42 USD
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$ 83.42 USD
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BMW N55 3.0L Thermostat Assembly is an essential component for maintaining optimal engine temperature in your BMW, ensuring reliable performance and longevity. A common source of cracks and leaks, the thermostat assembly plays a critical role in regulating coolant flow. This high-quality replacement from Turner Motorsport is designed to meet or exceed OEM standards, providing a dependable solution to prevent overheating and maintain your engine's efficiency.

  • Reliable Temperature Regulation: Ensures optimal engine temperature for peak performance.
  • High-Quality Replacement: Meets or exceeds OEM standards, reducing the risk of cracks and leaks.
  • Enhanced Durability: Designed to withstand the demands of the N55 3.0L engine.
  • Prevents Overheating: Critical for maintaining engine efficiency and longevity.
  • Perfect Fit: Engineered for easy installation and compatibility with your BMW N55 3.0L engine.
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URO Heater Core Hose - 64216983858
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T#:26171674
Part#: 64216983858
In Stock
$ 44.99 USD
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Ensure optimal engine cooling in your BMW with these high-quality cooling pipes and hoses. Designed to maintain proper engine temperature, immediate replacement is necessary if cracks are detected to prevent engine overheating. This specific coolant supply hose serves the heater core, crucial for efficient heating in your vehicle.
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URO Drain Plug With Sleeve - E82/88, E89 Z4, E9X (With an Automatic T...
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T#:7624638
Part#: 17117521781
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$ 22.98 USD
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$ 22.98 USD
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Commonly broken when opened to drain the radiator.

Radiator Adjustment Screw / Drain Plug
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T#:37959694
Part#: 17107523260
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$ 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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Thermostat Housing
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T#:392721
Part#: 11531730470
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$ 39.99 USD
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This is a quality aftermarket replacement aluminum thermostat housing for cars with the M20 6 cylinder engine - 325e, 325i, 528e, 525i. This is the side of the housing that mounts to the cylinder head and has openings for the various coolant / engine temperature sensors. There are 4 ports for sensors so check your existing housing for the sensor layout.

If you're looking for a Genuine BMW factory replacement part, Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.
 

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BMW E30 Coolant Hose - Return Line
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T#:362004
Part#: 11531722743
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$ 42.39 USD
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Attaches the thermostat to the bottom of radiator


Heater Hose
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T#:363331
Part#: 64218367790
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$ 34.99 USD
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Used to connect to the inline thermostat
BMW Water Pump - Remanufactured - 11517527799
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T#:372932
Part#: 11517527799
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$ 42.99 USD
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Features a metal impeller for reliability
BMW F30 B58 Electronic Thermostat And Coolant Distribution Module ...
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T#:27372122
Part#: 11537642854
Back Ordered
$ 265.97 USD
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$ 265.97 USD
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BMW F30 B58 Electronic Thermostat And Coolant Distribution Module from Turner Motorsport is an essential component for maintaining precise engine temperature control. Managed by the vehicle’s computer, this thermostat ensures optimal performance and efficiency by regulating engine and coolant temperatures accurately.

  • Precise Temperature Control: Managed by the BMW vehicle's computer for accurate engine and coolant temperature regulation.
  • Enhanced Performance: Ensures optimal engine performance and efficiency by maintaining the correct operating temperature.
  • Genuine BMW Quality: Authentic part designed specifically for BMW F30 models with B58 engines.
  • Reliable Operation: Built to meet BMW's high standards for reliability and durability.
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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

BMW E46 Cooling Fan Shroud
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T#:377316
Part#: 17111436259
In Stock
$ 52.89 USD
$ 52.89 USD

BMW E46 Cooling Fan Shroud is essential for maximizing airflow through your radiator, ensuring optimal engine cooling. This shroud is designed to create the most efficient pull of air, keeping your engine temperature under control, especially during demanding driving conditions.

  • Enhanced Cooling Efficiency: Maximizes airflow through the radiator, ensuring your engine stays cool.
  • High-Quality Construction: Manufactured by URO Parts, a leading brand known for producing reliable and durable replacement components.
  • Precision Fit: Designed specifically for the BMW E46, ensuring a perfect fit and easy installation.
  • ISO 9000 Certified: Built to meet ISO 9000 certification standards for long-lasting performance and reliability.
  • Trusted by Enthusiasts: URO Parts is a trusted name in the automotive industry, offering components that deliver OEM-like performance.

Upgrade your BMW E46 with this Cooling Fan Shroud from Turner Motorsport to enhance your vehicle’s cooling system and maintain peak performance.

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Vent Hose Assembly
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T#:18468306
Part#: 17127576363
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$ 29.99 USD
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Aluminum connector vs OEM plastic The connector cracks/leaks over time causing coolant to leak and/or overheating problems 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)
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URO Fan Blade - BMW E3X
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T#:373133
Part#: 11521712110
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$ 33.99 USD
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Replace your fragile fan blades before they break and damage your radiator.
Thermostat Housing Cover
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T#:367144
Part#: 11531265059
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$ 25.99 USD
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Replace your old or cracked thermostat cover

Coolant Expansion Tank
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T#:373102
Part#: 17111723520
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$ 29.99 USD
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Does not include cap or coolant level sensor

BMW F25 F26 N54 N55 Thermostat Assembly
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T#:15445602
Part#: 11537586784
In Stock
$ 95.99 USD
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BMW F25 F26 N54 N55 Thermostat Assembly is crucial for maintaining your vehicle's optimal cooling performance. If your BMW is experiencing cooling issues, the thermostat could be the culprit. Common symptoms include prolonged engine warm-up at highway speeds if the thermostat is stuck open, or consistent overheating if it’s stuck closed. Both conditions can lead to poor performance and potential damage to essential engine components.

  • Optimal Temperature Regulation: Ensures your engine maintains the proper operating temperature for efficient performance.
  • Prevents Overheating: Replaces faulty thermostats that can cause the engine to overheat, protecting vital components.
  • Improves Warm-Up Time: Addresses issues related to prolonged warm-up periods, enhancing overall driving comfort.
  • High-Quality Construction: Designed to meet or exceed OEM specifications for reliability and durability.
  • Easy Installation: Direct fit replacement that simplifies the repair process.

Upgrade your BMW’s cooling system with the BMW F25 F26 N54 N55 Thermostat Assembly from Turner Motorsport to ensure reliable engine performance and prevent overheating issues.

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URO Auxiliary Cooling Fan Assembly
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T#:377306
Part#: 17117561757
In Stock
$ 217.99 USD
$ 217.99 USD
The auxiliary fan in your vehicle serves an extremely important role. When your car reaches temperatures that may be hazardous to your engine, the auxiliary fan moves air through the radiator to provide better cooling. Usually activated during times of stationary vehicle operation, it supplements the air usually driven through the radiator by driving down the road. If your vehicle is getting too hot during traffic or at stop lights, your auxiliary fans are probably faulty. Replace yours with this piece from ACM to restore the factory cooling in your vehicle and prevent catastrophic damage to your engine. Even if your fans are still operational but the blades are damaged or cracked, replacement is the only solution.
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URO Coolant Expansion Tank - BMW E46 M3
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T#:48608189
Part#: 17112283344
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New Item
$ 155.99 USD
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​This radiator coolant reservoir/expansion tank for E46 M3 is a common failure item as the plastic weakens and cracks, causing coolant leaks. If your E46 M3 has over 80k miles and still has the original expansion tank, we highly recommend replacing it during your next major service.
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Radiator Fan Clutch
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T#:373087
Part#: 11527502804
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$ 91.99 USD
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$ 91.99 USD
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Keep your engine cool
URO Radiator Hose (Lower) - Z3
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T#:38094315
Part#: 11531716642
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$ 23.99 USD
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Whether replacing a failing radiator hose or replacing for proper maintenance, the URO Lower Radiator Hose ensures exceptional cooling efficiency, reliability, and longevity, keeping your BMW’s engine running at peak performance.
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Coolant Expansion Tank - E53 E46 E83 M52 M54
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T#:373103
Part#: 17137787039
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$ 45.99 USD
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We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on.
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URO Parts Lower Coolant Hose Assembly - 17127548224
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T#:26671649
Part#: 17127548224
Ships in 2 Business Days
$ 96.99 USD
$ 96.99 USD

Ensure the longevity and safety of your vehicle's engine by replacing aging plastic and rubber cooling system components. Over time, these parts become weak points, risking engine safety with each mile driven. Dry-rot, splitting, or breaks in cooling hoses can result in antifreeze loss, leading to potential engine overheating. To prevent damage to delicate aluminum engine components, it's recommended to replace engine cooling hoses every 100,000 miles.

Thankfully, URO Parts offers a cost-effective solution to safeguard your engine from potential failure. These high-quality components ensure safe and smooth operation, free of coolant loss or overheating.

Features:

  • Formed hoses for a perfect factory fit
  • Includes hose clamps and brackets for easy installation and routing around engine accessories
  • Temperature and chemical-resistant rubber composition
  • Durable plastic construction

If you're overhauling your BMW's cooling system, replacing this critical lower hose is essential.

URO Parts provides over 8,000 high-quality spare parts, many designed to replace factory BMW components. Their commitment to precision, materials, and workmanship ensures each part meets the highest standards. With a focus on durability, function, and affordability, URO Parts delivers quality replacement components you can trust.

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Radiator Fan Clutch
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T#:388739
Part#: 11527830486
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$ 62.74 USD
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$ 62.74 USD
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The fan clutch adjusts the speed of the fan based on the rotational speed of the engine. When unneeded, the fan clutch reduces rotational load and drag. If you have a mechanical fan and your vehicle runs a little hotter than it should in traffic, this may be your solution.
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Drive Wheel For Water Pump
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T#:5760271
Part#: 11517619020
In Stock
$ 42.01 USD
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Coolant Expansion Tank
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T#:384250
Part#: 17137640514
In Stock
$ 72.99

This product was last offered at the strikethrough price on
12-14-2025

$ 60.74 USD
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$ 60.74 USD
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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.
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Coolant Outlet Hose with metal fitting
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T#:592945
Part#: 11537541992
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$ 31.42 USD
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Heavy Duty Aluminum Connector; Cylinder Head to T-Stat Housing

URO - Heater Inlet Pipe - E46, Z3, E39
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T#:34080697
Part#: 11531705210
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$ 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.

URO Water Hose Assembly - BMW E9X E82 E88
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T#:37892140
Part#: 17127548229
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$ 97.99 USD
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URO Water Hose Assembly - BMW E9X E82 E88

Engineered to meet OE dimensions, the URO Water Hose Assembly ensures easy installation and reliable hose connections for BMW E9X, E82, and E88 models. The high-strength alloy or composite pipe material is designed to withstand intense engine heat and corrosive coolant, providing long-lasting durability. It resists warping and cracking, preventing coolant leaks and maintaining optimal engine performance. This assembly is a dependable solution for BMW owners seeking to enhance their vehicle’s cooling system reliability.

Key Benefits:

  • Manufactured to OE dimensions for easy installation and secure hose connections.
  • High-strength alloy or composite pipe material resists intense engine heat and corrosive coolant.
  • Prevents warping and cracking to avoid coolant leaks.
  • Ensures reliable cooling system performance.
  • Specifically designed for BMW E9X, E82, and E88 models.
  • Enhances durability and longevity of the cooling system.
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URO Expansion Tank Mounting Plate - E83
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T#:593040
Part#: 17113400017
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$ 68.99 USD
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Secures the expansion tank to the radiator
URO Coolant Expansion Tank - F30 328i xDrive 320i xDrive 320i 328i ...
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T#:639293
Part#: 17137642158
In Stock
$ 86.99

This product was last offered at the strikethrough price on
03-09-2026

$ 65.99 USD
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$ 65.99 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!
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URO Auxiliary Pusher Fan Assembly - With Frame - E46
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T#:592701
Part#: 64546988913
Ships in 2 Business Days
$ 202.99 USD
$ 202.99 USD
The auxiliary fan in your vehicle serves an extremely important role. When your car reaches temperatures that may be hazardous to your engine, the auxiliary fan moves air through the radiator to provide better cooling. Usually activated during times of stationary vehicle operation, it supplements the air usually driven through the radiator by driving down the road. If your vehicle is getting too hot during traffic or at stop lights, your auxiliary fans are probably faulty. Replace yours with this piece to restore the factory cooling in your vehicle and prevent catastrophic damage to your engine. Even if your fans are still operational but the blades are damaged or cracked, replacement is the only solution.
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Coolant Expansion Tank
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T#:363421
Part#: 17117573751
Ships in 2 Business Days
$ 64.99 USD
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$ 64.99 USD
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Does not include cap or coolant level sensor
Fan Clutch
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T#:373086
Part#: 11521723027
Ships in 2 Business Days
$ 74.00 USD
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Direct replacement from URO

Engine Block Cover - Rear
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T#:36235515
Part#: 11142446298
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$ 464.99 USD
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Details: Fitment guaranteed Replacement for cracked, or damaged engine block cover. Precisely manufactured to OE dimensions for exact fit and easy installation Durable high-quality materials are corrosion-resistant and withstand oil vapor and intense engine heat
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Coolant Expansion Tank
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T#:377303
Part#: 17107514964
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$ 52.30 USD
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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break.
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Cooling Fan Shroud
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T#:377273
Part#: 17101440252
Ships in 2 Business Days
$ 42.59 USD
$ 42.59 USD
The cooling fan shroud is essential to creating the most pull of air flow through your radiator to keep your engine cool.

URO Expansion Tank Hose - Heater Core To Expansion Tank - BMW E46 M52...
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T#:43750239
Part#: 64218376153
Ships in 2 Business Days
$ 29.99 USD
Free Shipping on orders $49 and up
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. With the proper diameter, bends, and lengths, this is the perfect replacement for any swelled or damaged hose. An easy installation, it's piece of mind the next time you are on a long trip or your morning commute.
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Water Pump - W/ Gasket
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T#:372935
Part#: 11519071562
Ships in 2 Business Days
$ 51.99 USD
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$ 51.99 USD
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The water pump in your vehicle keeps all that coolant flowing freely. If it begins to fail, overheating problems are inevitable. Don't take a chance on doing damage to engine internals by not replacing your water pump.
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Auxiliary Fan Shroud
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T#:373132
Part#: 17111712686
Ships in 2 Business Days
$ 29.99 USD
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The radiator fan shroud in your BMW surrounds the cooling fan blades. It concentrates ram and fan air flows through the radiator to improve heat transfer. It also protects anyone working beneath the hood from the spinning fan blades and water or debris the fan may sling when spinning.
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URO Thermostat With Housing - E39 540i, E38 740i (96-98)
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T#:639573
Part#: 11531437526
Ships in 2 Business Days
$ 56.99 USD
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$ 56.99 USD
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​This is a complete assembly including the housing and sealing o-ring.
Coolant Expansion Tank
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T#:587608
Part#: 17137823626
In Stock
$ 47.99

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

$ 41.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 47.99

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

$ 41.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Expansion Tank
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T#:587219
Part#: 17137647283
Ships in 2 Business Days
$ 60.99 USD
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URO Coolant Outlet Flange - BMW F2X 1
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T#:50031880
Part#: 11118619408
In Stock
New Item
$ 55.99 USD
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Replaces the plastic OE flange with durable aircraft-quality aluminum.
URO Water Pump - BMW N52 3.0L
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T#:39768338
Part#: 11517586925
In Stock
$ 296.99 USD
Free Shipping on orders $49 and up
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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