BMW Cooling System Parts & Accessories for BMW X Series E84 (2013-2015)

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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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BMW N54 N55 S55 Mosselman Thermostat Installation Kit
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Packaged by Turner - Corporate Logo
T#:4799665
Part#: THERMINSTALLKT
In Stock
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06-15-2026

$ 21.64 USD
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$ 22.99

This product was last offered at the strikethrough price on
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$ 21.64 USD
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BMW N54 N55 S55 Mosselman Thermostat Installation Kit is designed to ensure a seamless installation of the Mosselman thermostat on BMW engines. This comprehensive kit from Turner Motorsport includes all necessary gaskets and components, guaranteeing a reliable and precise installation for optimal engine performance.

  • Complete Kit: Includes all essential gaskets and components required for a hassle-free thermostat installation.
  • Optimal Performance: Ensures proper installation of the Mosselman thermostat, leading to improved engine cooling efficiency and performance.
  • High-Quality Components: Gaskets and parts are manufactured to meet high standards of durability and reliability.
  • Precision Fit: Engineered to match OEM specifications, providing a perfect fit and reliable performance.
  • Ease of Installation: All necessary parts are included, simplifying the installation process and reducing the need for additional purchases.

Upgrade your BMW's cooling system with the Mosselman Thermostat Installation Kit from Turner Motorsport, ensuring a top-quality, reliable setup for your engine.

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Water Pump And Thermostat Kit - N20
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
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
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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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Packaged by Turner - Corporate Logo
T#:554075
Part#: 11537601158KT2
In Stock
Sale - Save 24% $ 106.99

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

$ 81.42 USD
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Sale - Save 24%
$ 106.99

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

$ 81.42 USD
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If your vehicle is experiencing cooling issues, chances are the thermostat is the cause. Common symptoms include prolonged warm-up at highway speeds from the thermostat being stuck open, or consistent overheating issues from the thermostat being stuck in the closed position. Either condition can result in poor performance, and potential damage to vital components in your vehicle.

Kit includes

  • Wahler Thermostat
  • 1 liter of Coolant

This item fits the following BMWs: 
2008-2013  E82 BMW  135i 135is 1M Coupe 
2013+  E84 BMW  X1 xDrive35i 
2011  E90 BMW  335i 335xi 335i xDrive - Sedan 
2011-2013  E92 BMW  335i 335xi 335i xDrive - Coupe 
2011-2013  E93 BMW  335i Convertible 
2011-2013  E70 BMW  X5 xDrive35i 
2011-2013  E71 BMW  X6 xDrive35i

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Pierburg Full Aluminum Water Pump With Hardware
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:6091465
Part#: 11515A05704APKT
Ships on Jan 11, 2027
Sale - Save 15% $ 620.99

This product was last offered at the strikethrough price on
04-01-2026

$ 526.79 USD
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Sale - Save 15%
$ 620.99

This product was last offered at the strikethrough price on
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$ 526.79 USD
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If your water pump is starting to fail, you may notice coolant leaks, or even hear a whining noise coming from under the hood. If you think your water pump is starting to fail, replace it as soon as you can. The main downside to an electric water pump is you may also notice nothing - nothing but overheating! Keep your eyes peeled for warning signs it may be time to replace your water pump. N54 and N55 engines are prone to water pump failure - replace every 60,000 miles. Comes with electric water pump and installation hardware. Aluminum mounting bolts are one time use. Replace every time the water pump is removed.
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OEM Water Pump And Thermostat Kit - N55 3.0L
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Packaged by Turner - Corporate Logo
T#:557277
Part#: N55WTKT3
Ships on Jan 11, 2027
$ 806.99 USD
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$ 806.99 USD
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The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. This kit provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road.

Kit includes:

  • OEM Wahler Thermostat
  • OEM VDO Electric Water Pump
  • Genuine BMW Antifreeze/Coolant
  • OEM VDO Mounting hardware required for both the thermostat and water pump
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Packaged by Turner - Corporate Logo
T#:55353595
Part#: OTN54.T85KT3
In Stock
New Item
$ 390.23 USD
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High oil temperatures are the ultimate enemy of your engine's longevity and performance. If you want to keep pushing your BMW to the limit you need to manage the heat.

CRP Radiator Vent Hose - E82, E84, E88, E90, E92, E93
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:1195859
Part#: 17127565094
In Stock
$ 34.99 USD
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$ 34.99 USD
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Located on the top of the radiator
Thermostat
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:26538316
Part#: 11537601158
In Stock
Sale - Save 20% $ 95.99

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

$ 76.70 USD
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Sale - Save 20%
$ 95.99

This product was last offered at the strikethrough price on
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$ 76.70 USD
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Rein Coolant Hose - E82, E84, E88, E90, E92, E93
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592013
Part#: 17127599450
In Stock
$ 58.99 USD
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$ 58.99 USD
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Connects your radiator to the thermostat

Rein Coolant Hose - BMW F22/23 F3X
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594310
Part#: 11537639997
In Stock
$ 57.99 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.
Low Temperature Thermostat - 97C
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Bremmen Parts - Corporate Logo
T#:33612901
Part#: 11537601158-97C
In Stock
Sale - Save 20% $ 95.99

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

$ 76.70 USD
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$ 95.99

This product was last offered at the strikethrough price on
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$ 76.70 USD
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Rein Water Hose With Gasket - Water Pump To Engine Inlet
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17804808
Part#: 11537584630R
In Stock
$ 40.99

This product was last offered at the strikethrough price on
08-24-2026

$ 36.99 USD
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$ 40.99

This product was last offered at the strikethrough price on
08-24-2026

$ 36.99 USD
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Rein OE quality water hoses are designed to be direct replacements for OE hoses and assemblies. This includes the hose and clamps.


Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594291
Part#: 11537584549
In Stock
$ 31.99 USD
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Connects to the thermostat. Replacement from Rein.
Coolant Hose
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:30729015
Part#: 17127599450
Ships in 9 Business Days
Sale - Save 20% $ 50.99

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

$ 40.79 USD
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$ 50.99

This product was last offered at the strikethrough price on
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$ 40.79 USD
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Rein Coolant Hose - BMW F22/23 F3X
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591823
Part#: 11537639998
In Stock
$ 42.99 USD
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Connects from water pump to block

Rein - Corporate Logo
T#:53750144
Part#: CHU0629
In Stock at Vendor
New Item
$ 56.99 USD
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Upgraded Coolant Hose from Rein Featuring Metal Flanges to Reduce Leaks

Coolant Expansion Tank Cap
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:36032339
Part#: 17117639020
In Stock
Sale - Save 20% $ 14.99

This product was last offered at the strikethrough price on
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$ 11.99 USD
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$ 14.99

This product was last offered at the strikethrough price on
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$ 11.99 USD
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Bremmen Water Pump Bolt - M8x34 - BMW N20 2.0L
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:36913363
Part#: 11517602125
In Stock
Sale - Save 35% $ 4.99

This product was last offered at the strikethrough price on
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$ 3.26 USD
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$ 4.99

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This external torx head screw is a direct replacement for the costly OEM screw, which must be replaced during every water pump service.

Quantity 3 required for complete replacement.


N54 Coolant Hose/Elbow - 11537545665
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:36100140
Part#: 11537545665
In Stock
Sale - Save 23% $ 16.99

This product was last offered at the strikethrough price on
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$ 13.05 USD
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$ 16.99

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This Coolant Hose is located behind the thermostat on N54-equipped BMW models. Due to weak rubber construction and its close proximity to the bank one turbocharger, this hose is a common failure item on high-mileage vehicles.

Whether you are replacing a failed hose or preemptively servicing your cooling system, choose this high-quality replacement from Bremmen Parts for a lasting repair.

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Rein Water Pump Service Kit - N20
From production years 2013- 2015
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:14023856
Part#: 11518635089-3
Special Order: No Guaranteed ETA
$ 898.99

This product was last offered at the strikethrough price on
08-24-2026

$ 715.99 USD
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$ 715.99 USD
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Kits include: water pump thermostat assembly head to thermostat hose w/ aluminum flange WP to engine hose WP to thermostat hose all necessary clamps and hardware This Rein water pump service kit addresses common coolant hose plastic flange failure and ensures that the water pump replacement repair is done right the first time. The water pump and thermostat are OEM Use of OE or Pentosin NF-G11 coolant is recommended
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BMW Turbo Cooling Line
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46478582
Part#: CHT0690
Back Ordered
$ 56.00

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

$ 55.99 USD
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$ 55.99 USD
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Your turbo is constantly working under extreme heat and pressure, generating serious boost every time you get on the gas. The turbo cooling lines are responsible for circulating coolant through the turbocharger, keeping temperatures in check and safeguarding internal components from excessive heat. With time, these lines can corrode, crack, or clog—compromising coolant flow and system efficiency. If left unchecked, a failing line can lead to overheating, loss of performance, or even costly turbo damage. Why replacing them matters: Protect your turbo – Ensures proper cooling to prevent heat soak and extend turbo life. Stop leaks early – Prevent small coolant drips from turning into bigger, more expensive problems. Keep performance consistent – Reliable cooling means steady boost and dependable operation. Don’t let a tired cooling line put your turbo at risk—replace it and keep your forced-induction system performing at its best.
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Radiator Hose - Engine To Radiator
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594372
Part#: 17127612444
Ships in 3 Business Days
$ 57.99 USD
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Replacement Radiator Hose - Engine To Radiator from Rein
Water Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616352
Part#: 17127599452
Ships in 3 Business Days
New Item
$ 63.99 USD
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Rein Automotive cooling hoses are designed as precision OEM-quality replacements that withstand the rigorous demands of hard driving.
Rein Radiator Hose - Radiator To Thermostat
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17605210
Part#: 17127612445
Ships in 3 Business Days
$ 58.99 USD
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Rein lower radiator hose replacement.