BMW Cooling System Parts & Accessories for BMW 3 Series F31 (2014+)

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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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Water Pump And Thermostat Kit - N20
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T#:554053
Part#: 11517604027KT1
In Stock
Sale - Save 25% $ 461.99

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

$ 344.49 USD
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Sale - Save 25%
$ 461.99

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

$ 344.49 USD
Free Shipping

The N20/n26 engined cars already suffer from reduced cooling area because of the factory intercooler, tight space under the hood, and of course heat from the turbo(s). BMW addressed these challenges a number of ways, including a dynamic, 'smart' electric water pump with increased output compared to normally aspirated models. The cooling demands mean additional stress on the major cooling components, especially the water pump and thermostat. 
 

Kit includes:

  • Mahle-Behr thermostat
  • Pierburg water pump
  • Genuine BMW coolant
  • Mounting hardware required for both the thermostat and water pump

 

This item fits the following BMWs: 
2014+ F22 BMW 228i 228i xDrive 
2014+ F23 BMW 228i 228i xDrive 
2012+ F30 BMW 328i 328i xDrive - Sedan 
2013+ F31 BMW 328i xDrive - Wagon 
2013+ F32 BMW 428i 428i xDrive - Coupe 
2013+ F33 BMW 428i Convertible 428i xDrive Convertible - Convertible 
2014+ F34 BMW 328i xDrive GT - Gran Tourismo 
2014+ F36 BMW 428i Gran Coupe 428i xDrive Gran Coupe 
2012+ F10 BMW 528i 528i xDrive 
2011+ F25 BMW X3 xDrive28i 
2015+ F26 BMW X4 xDrive28i 
2009+ E89 BMW Z4 sDrive28i

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Water Pump & Thermostat Kit - Gen 1 B46 2.0L
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Packaged by Turner - Corporate Logo
T#:35863149
Part#: 11518638026TKT
In Stock
Sale - Save 5% $ 731.99

This product was last offered at the strikethrough price on
06-30-2026

$ 696.75 USD
Free Shipping on orders $49 and up
Sale - Save 5%
$ 731.99

This product was last offered at the strikethrough price on
06-30-2026

$ 696.75 USD
Free Shipping on orders $49 and up
BMW's cooling system has long been a known weak spot, with the water pump and thermostat being two of the most common trouble areas. This remains true even in the latest B-Series engines found in 2016 and newer BMW models. This kit includes a brand-new OEM Pierburg water pump, a Bremmen thermostat (now referred to as a Heat Management Module), and one gallon of BMW's G48 coolant concentrate (enough to make two gallons of 50/50 coolant). Avoid spending thousands at the dealership or over $600 on Genuine BMW parts! These components can be replaced with high-quality OEM parts in just an afternoon using basic hand tools.
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OEM Coolant Expansion Tanks Kit - F22/23 F3X B48 B58
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Packaged by Turner - Corporate Logo
T#:27605427
Part#: 17138677649TKT
Ships on Oct 5, 2026
Sale - Save 17% $ 208.99

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

$ 173.05 USD
Free Shipping on orders $49 and up
Sale - Save 17%
$ 208.99

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

$ 173.05 USD
Free Shipping on orders $49 and up
Genuine BMW expansion tanks have a bad habit of failing after a few years. This has primarily been caused by the plastic construction of the expansion tanks. After enough heat cycles, the plastic becomes brittle and can crack, causing coolant to leak out and air to enter the coolant system. If a failing expansion tank is not addressed soon enough, the coolant loss can lead to an overheating engine. This kit includes two brand new high quality expansion tanks and caps
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Water Pump & Thermostat Kit - BMW F30/F31 328d, F25 X3 28d xDrive N47...
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Packaged by Turner - Corporate Logo
T#:48160285
Part#: 11518516204KT2
Ships on Oct 30, 2026
$ 318.02 USD
Free Shipping on orders $49 and up
It is important that your coolant system is serviced at regular intervals to ensure a long life. Over time, coolant systems are exposed to high temperatures and repeated thermal cycling, which causes warping, cracking, and hardening of plastics and rubber components in the coolant system. This can lead to coolant leaks and overheating, which can result in extensive engine damage if not resolved in a timely manner. This Water Pump & Thermostat kit helps to address a few of the most problematic parts, replacing these items entirely to keep your cooling system running optimally and efficiently.
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URO Parts Expansion Tank - 17137642160
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URO - Corporate Logo
T#:29002182
Part#: 17137642160
Back Ordered
$ 80.81 USD
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Expansion tanks are susceptible to damage due to constant exposure to high ambient temperatures and chemical degradation. If your expansion tank is cracked, replacing it is crucial to prevent catastrophic engine damage from overheating.

Features:

Guaranteed fitment Precision-molded to OE dimensions for compatibility with original sensors and connections Quality materials resist engine heat and harsh cooling system environments Factory pressure-tested 24-Month Unlimited Mileage Warranty URO Parts offers more than 8,000 high-quality spare parts, many of which are specifically designed to replace factory BMW components. Their business was founded on the premise of producing parts that adhere to the highest standards of precision, materials, and workmanship. Each part is closely evaluated by a team of industry professionals to determine how to offer the best blend of durability, function, and price. If you're looking for quality replacement components at a reasonable price, look no further than URO Parts.

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BMW B46 B48 Thermostat With Housing And Gasket
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URO - Corporate Logo
T#:27372124
Part#: 11537644811
Back Ordered
$ 265.99 USD
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BMW B46 B48 Thermostat With Housing And Gasket is an essential component for maintaining optimal engine performance and cooling efficiency. This high-quality thermostat comes complete with housing and gasket, ensuring a precise fit and reliable operation.

The thermostat plays a crucial role in regulating the flow of coolant based on engine temperature. By controlling this flow, it helps maintain the engine at its optimal operating temperature, preventing overheating and ensuring efficient performance.

  • Complete Assembly: Includes thermostat, housing, and gasket for easy installation.
  • Optimal Cooling: Regulates coolant flow to maintain proper engine temperature.
  • Enhanced Performance: Ensures your engine operates within its ideal temperature range.
  • Durable Construction: Made with high-quality materials for long-lasting reliability.

Ensure your BMW's cooling system is functioning correctly with this reliable thermostat assembly from Turner Motorsport.

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URO Turbocharger Cooling Supply Line - 11538663516
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URO - Corporate Logo
T#:28537510
Part#: 11538663516
Ships in 1 Business Day
$ 49.99 USD
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This hose assembly delivers coolant to the turbocharger, aiding in heat dissipation. Promptly replace any leaking coolant lines to prevent engine and turbocharger damage.

Key Features:

Ensured fitment for your vehicle Precision-formed to match the length and shape of OE turbocharger coolant lines, ensuring proper appearance and function Equipped with the correct end fittings for easy installation and leak-free performance Constructed using high-quality materials to withstand coolant exposure and turbo heat URO Parts offers more than 8,000 high-quality spare parts, many of which are specifically designed to replace factory BMW components. Their business was founded on the premise of producing parts that adhere to the highest standards of precision, materials, and workmanship. Each part is closely evaluated by a team of industry professionals to determine how to offer the best blend of durability, function, and price. If you're looking for quality replacement components at a reasonable price, look no further than URO Parts.

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BMW Coolant Pipe - BMW F22/23 F3X
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For vehicles with automatic transmissions only.
URO - Corporate Logo
T#:50031885
Part#: 11537639997
Ships in 1 Business Day
New Item
$ 49.99 USD
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Water pipes and coolant hoses are essential for proper cooling. If they are cracked, they are going to need to be replaced as soon as possible to avoid overheating your engine. Wear is easy to see on these rubber hoses. Bulges, cracking, splitting at connections, and the loss of flexibility are usually big indicators that they are reaching the ends of their lives. Replace them whenever this wear is identified. Genuine BMW Feed Line - This item fits the following BMW Chassis: E89 Z4,F10,F22,F30,F31,F32,F33,F34,F36 Fits BMW Engines including: N20,N26
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URO Engine Oil Cooler
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URO - Corporate Logo
T#:37858360
Part#: 17217560962
Ships in 1 Business Day
$ 57.99 USD
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**Cooler only—housing not included.** Your vehicle’s oil cooler functions exactly as its name suggests—it cools engine oil by circulating it through a series of fins filled with coolant, regulating its temperature before and after passing through the oil filter. A failing oil cooler can cause coolant and engine oil to mix, similar to a blown head gasket. Replace your leaking or damaged oil cooler today to prevent further issues. **Seal not included.**
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Engine Oil Cooler
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URO - Corporate Logo
T#:37858351
Part#: 11428585624
Ships in 1 Business Day
$ 43.99 USD
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Your vehicle’s oil cooler does exactly what its name implies—it cools engine oil by circulating it through a series of fins filled with flowing coolant. This process helps regulate oil temperature before and after it passes through the oil filter. If the oil cooler fails, it can cause coolant and engine oil to mix, similar to a blown head gasket. Replace your leaking or damaged oil cooler today to prevent further issues. **Seal not included.**
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URO Expansion Tank Hose - BMW F2X F3X 230i 330i 430i
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URO - Corporate Logo
T#:37925862
Part#: 17129845173
Ships in 1 Business Day
$ 25.99 USD
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URO Expansion Tank Hose - BMW F2X F3X 230i 330i 430i

The URO Expansion Tank Hose - BMW F2X F3X 230i 330i 430i is a high-quality replacement hose designed to meet the rigorous standards of BMW vehicles. Precision-molded to match the OE recovery tank hose shape, it ensures effortless installation and a perfect fit. Built to resist engine heat and ozone exposure, this hose is made from durable ECD-resistant EPDM material, which prevents electrolysis and internal breakdown. With a temperature rating of -40º F to 275º F (-40º C to 135º C), it performs reliably in extreme conditions. Supported by a 24-month unlimited mileage warranty, this hose is a dependable choice for BMW owners seeking durability and precision.

Key Benefits:

  • Precision-molded to OE shape for easy installation and perfect fit
  • Engine heat and ozone resistant for long-lasting performance
  • Durable ECD-resistant EPDM material prevents internal breakdown
  • Wide temperature range: -40º F to 275º F (-40º C to 135º C)
  • 24-month unlimited mileage warranty for peace of mind

Upgrade your BMW F2X F3X 230i 330i 430i with the URO Expansion Tank Hose and ensure optimal cooling system performance for your vehicle.

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BMW Auxiliary Water Pump
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URO - Corporate Logo
T#:46753502
Part#: 11518635089
Ships in 1 Business Day
$ 377.99 USD
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If your water pump is on its way out, you might spot coolant leaks or hear a faint whining sound from under the hood. Don’t wait—if you suspect it’s failing, replace it before it leaves you stranded. The tricky part with electric water pumps is that they can fail silently—no noise, no leaks—just sudden overheating. Stay alert for early warning signs that it’s time to swap out your water pump and keep your cooling system running strong.
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Coolant Connector Pipe
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URO - Corporate Logo
T#:5788129
Part#: 11127810707
Ships in 1 Business Day
$ 15.99 USD
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This pipe connects the cylinder head to the coolant hose.
Engine Coolant Hose F22, F23, F30, F31, F34, F32, F33, F36 - B48 ...
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URO - Corporate Logo
T#:53644215
Part#: URO-023423
Ships in 1 Business Day
New Item
$ 65.99 USD
$ 65.99 USD
This high-quality hose from URO prevents overheating by maintaining a stable engine temperature, allowing for optimal performance and extended engine life.
URO Turbocharger Cooling Return Line - 11538853293
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URO - Corporate Logo
T#:28537511
Part#: 11538853293
Ships in 1 Business Day
$ 56.99 USD
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This hose assembly directs coolant away from the turbocharger, allowing cooler coolant from the radiator to flow through. Replace any leaking coolant lines promptly to prevent engine and turbocharger damage.

Key Features:

Ensured fitment for your vehicle Precision-formed to match the length and shape of OE turbocharger coolant lines, ensuring proper appearance and function Equipped with the correct end fittings for easy installation and leak-free performance Constructed using high-quality materials to withstand coolant exposure and turbo heat URO Parts offers more than 8,000 high-quality spare parts, many of which are specifically designed to replace factory BMW components. Their business was founded on the premise of producing parts that adhere to the highest standards of precision, materials, and workmanship. Each part is closely evaluated by a team of industry professionals to determine how to offer the best blend of durability, function, and price. If you're looking for quality replacement components at a reasonable price, look no further than URO Parts.

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URO Coolant Bypass Hose - B48
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URO - Corporate Logo
T#:54851970
Part#: 17128616914
Back Ordered
New Item
$ 44.99 USD
$ 44.99 USD
On the street or at the track, your cooling system is under constant attack from extreme heat, pressure, and vibration. If your factory bypass hose is looking soft or crusty, it's a ticking time bomb. This heavy-duty replacement hose is engineered to restore factory-level reliability with track-ready durability.
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URO Parts Expansion Tank - 17138677649
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URO - Corporate Logo
T#:29002185
Part#: 17138677649
In Stock
$ 87.99 USD
Free Shipping on orders $49 and up

Expansion tanks are susceptible to damage due to constant exposure to high ambient temperatures and chemical degradation. If your expansion tank is cracked, replacing it is crucial to prevent catastrophic engine damage from overheating.

Features:

Guaranteed fitment Precision-molded to OE dimensions for compatibility with original sensors and connections Quality materials resist engine heat and harsh cooling system environments Factory pressure-tested 24-Month Unlimited Mileage Warranty URO Parts offers more than 8,000 high-quality spare parts, many of which are specifically designed to replace factory BMW components. Their business was founded on the premise of producing parts that adhere to the highest standards of precision, materials, and workmanship. Each part is closely evaluated by a team of industry professionals to determine how to offer the best blend of durability, function, and price. If you're looking for quality replacement components at a reasonable price, look no further than URO Parts.

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