URO BMW Cooling System Parts & Accessories for BMW 3 Series E91 (2006-2012)

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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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URO Drain Plug With Sleeve - E82/88, E89 Z4, E9X (With an Automatic T...
For vehicles with automatic transmission
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T#:7624638
Part#: 17117521781
In Stock
$ 22.98 USD
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$ 22.98 USD
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Commonly broken when opened to drain the radiator.
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 Parts Lower Coolant Hose Assembly - 17127548224
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T#:26671649
Part#: 17127548224
Ships in 1-2 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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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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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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URO Lower Coolant Hose - Radiator To A/T Oil Cooler - BMW E82/88 E9X ...
For vehicles with automatic transmission only
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T#:43750237
Part#: 17117524710
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$ 33.99 USD
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$ 33.99 USD
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This hose runs from the lower coolant pipe on the passenger side of automatic transmission cars.
URO Coolant Bleeder Screw - Priced Each - BMW E9X F10
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T#:5416748
Part#: 11537793373
In Stock
$ 1.99 USD
Limited Qty Sale
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$ 1.99 USD
Limited Qty Sale
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URO Coolant Bleeder Screw - Priced Each - BMW E9X F10

The URO Coolant Bleeder Screw - Priced Each - BMW E9X F10 is a crucial component for maintaining optimal performance in your BMW's cooling system. When performing routine service, ensuring that all air pockets are removed from the coolant system is vital for proper function. Air pockets in the cooling system can prevent heat from circulating properly, potentially causing issues such as reduced heating efficiency or even engine overheating if trapped behind the thermostat.

  • Ensures proper air removal from the cooling system for improved engine performance
  • Prevents air pockets from interfering with heat circulation and engine cooling
  • Easy installation for an efficient and secure fit
  • Durable construction designed to withstand high pressure and temperature conditions
  • Helps maintain a fully functional cooling system, avoiding overheating and damage
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Auxiliary Fan Switch O-Ring
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T#:377077
Part#: 13621433077S
In Stock
$ 0.88 USD
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Now you can just replace the o-ring instead of the whole switch

Coolant Expansion Tank Cap
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T#:373591
Part#: 17117521071
In Stock
$ 18.99

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

$ 14.49 USD
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$ 14.49 USD
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Keep that coolant expansion tank sealed
URO Cooling O-Ring - E38, E39, E46, E82, E83, E88, E90, E91, E92, E93...
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T#:1196209
Part#: 17111711987
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$ 3.99 USD
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Fits various components in the cooling system
Radiator Carrier - Right
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T#:593028
Part#: 17107524914
Ships in 1 Business Day
$ 49.99 USD
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Plastic side frame for radiator


URO Silicone Coolant Pipe Repair Kit - BMW N52 3.0L
For vehicles with manual transmission
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T#:37757233
Part#: 11537535829RPR
Ships in 1 Business Day
$ 16.99 USD
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$ 16.99 USD
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This silicone coolant pipe repair kit replaces the factory rubber hose section found on the coolant pipe that runs from the engine block to the water pump, BMW p/n 11537535829. The factory rubber hose tends to split over time, leading to coolant loss. Silicone hose lasts significantly longer than rubber hose, ensuring leak-free engine operation for many years.
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Rubber Lower Radiator Mount Insert - Priced Each
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T#:593045
Part#: 17117805310
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$ 18.99 USD
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Found at the bottom of the radiator
URO Coolant Pipe O-Ring - BMW N52 3.0L
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T#:37892133
Part#: 11517514942
Back Ordered
$ 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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Auxiliary Fan Switch
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T#:376847
Part#: 13621433077
Back Ordered
$ 10.99 USD
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$ 10.99 USD
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Comes with related o-ring