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BMW Cooling Overhaul Kits

If you are the type of person who, rather than fixing individual components as they break, likes to refresh everything at once to make sure your cooling system is stout, then you're in the right place. Our overhaul kits give you the option to purchase everything you need to get your cooling system back in check at once. Our overhaul kits generally include thermostat, water pump, radiator, hoses, and expansion tanks.
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Genuine BMW - Corporate Logo
T#:401898
Part#: 11518635090KT
In Stock
$ 957.99 USD
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$ 957.99 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:

  • Genuine BMW Thermostat
  • Genuine BMW Electric Water Pump
  • Genuine BMW coolant
  • Mounting hardware required for both the thermostat and water pump
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Genuine BMW - Corporate Logo
T#:557278
Part#: 11517632426TKT
In Stock
$ 1,007.99 USD
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$ 1,007.99 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:

  • Genuine BMW Thermostat
  • Genuine BMW Electric Water Pump
  • Genuine BMW coolant
  • Mounting hardware required for both the thermostat and water pump
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Genuine BMW - Corporate Logo
T#:374891
Part#: 11531436408KT
Ships in 1 day
$ 548.99

This product was last offered at the strikethrough price on
06-03-2026

$ 544.99 USD
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$ 544.99 USD
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ECS Tuning BMW Cooling Hose Kit

Protect your BMW's cooling system with ECS Tuning's all-inclusive cooling hose kit. Engineered to endure extreme temperature fluctuations and environmental exposure, these hoses reduce the risk of unexpected failures that could leave you stranded.

  • Comprehensive kit covering all necessary cooling system hoses
  • Designed to withstand vast temperature changes and exposure to elements
  • Prevents unexpected failures and potential breakdowns
  • Includes a gallon of coolant for a complete service solution

Check the kit contents tab for a detailed list of included components.

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Genuine BMW - Corporate Logo
T#:371770
Part#: ECSE531711-1
Ships in 4 Business Days
$ 898.99 USD
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$ 898.99 USD
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Genuine BMW - Corporate Logo
T#:590918
Part#: 11518600442KT
Ships in 1 day
$ 2,226.99 USD
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$ 2,226.99 USD
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Genuine BMW - Corporate Logo
T#:369665
Part#: ECSE461711-2
Ships in 4 Business Days
$ 1,100.99 USD
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$ 1,100.99 USD
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A Level 2 kit that includes belt service components

Genuine BMW - Corporate Logo
T#:369664
Part#: ECSE461711-1
Ships in 4 Business Days
$ 847.99 USD
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$ 847.99 USD
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Genuine BMW - Corporate Logo
T#:377426
Part#: 11537601158KT
In Stock
$ 324.99 USD
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$ 324.99 USD
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BMW N55 3.0L Thermostat Replacement Kit is essential for maintaining proper engine temperature in your BMW N55 3.0L engine, helping to prevent cooling issues and protect vital engine components. A faulty thermostat can lead to prolonged warm-up times or persistent overheating, both of which can impact performance and cause potential engine damage. This high-quality replacement kit includes an OEM BMW thermostat and coolant for reliable performance and an easy installation.

  • Maintains optimal engine temperature and cooling efficiency
  • Prevents issues related to a stuck thermostat, like prolonged warm-up or overheating
  • Includes OEM BMW thermostat for a precise fit and factory-level performance
  • Comes with 1 gallon of OEM BMW coolant for a complete replacement
  • Helps protect engine components and maintain peak performance

Ensure your BMW N55 3.0L engine runs smoothly and efficiently with this BMW N55 3.0L Thermostat Replacement Kit.

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Active Autowerke - Corporate Logo
T#:5886968
Part#: 15-012
Ships in 3 Business Days
$ 2,849.99 USD
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$ 2,849.99 USD
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BMW's S55 motor is a modern marvel but one weak point, which Active identified is the entire cooling system for the intake which comprises the charge pipe, the aftercooler and the heat exchanger (or radiator). Finally there is a S55 aftercooler kit upgrade that is good enough to carry the Active Autowerke brand. Years of success in developing cars for motorsport has allowed Active to leverage its expertise to the top-mount charge air cooler on the F80 M3, F82 M4 and F87 M2 Competition. This aftercooler was made for the S55 and crafted using only high-grade aluminum to outperform the factory aftercooler in all situations from everyday driving to the toughest racing. The factory cooler was built to support a specific power target and environment. Many of you have increased the performance of the S55 which quickly overwhelms the stock cooler leading to heat soak and higher intake air temperatures which triggers the ECU to downgrade the performance until cooler air returns. Active's focus was not on a mass-market aesthetic add-on but a properly engineered improvement over the existing hardware. Active uses a tube-and-fin core designed specifically for the S55 and included turbulators to maximize the cooling efficiency in as small a package as possible. The end tanks are billet machined aluminum, not cast, folded, or bonded and ensure even distribution of the water throughout the internal aftercooler cores. High precision fittings, CNC machining, and TIG welding throughout ensures the highest quality construction to prevent pressure loss, and the lowest weight, in a bolt-on replacement. But Active also didn’t leave the aesthetics by the wayside as we dip the visible top of the aftercooler in a carbon fiber coating giving your installed cooling system a decidedly top market look to match the improved cooling performance. The Active silicone charge pipes for the F80 M3, F82/F83 M4 and the F87 M2 Competition improve the flow over the stock, compressed plastic pipes. The Active Silicone Charge Pipes allow you to maximize power on your F8X by securing all the boost that your S55 is making. These pipes replace the hot-side pipes leaving the turbos and into the top-mount aftercooler. The stock S55 charge pipes are notorious for developing hairline fractures at their plastic seams. These fractures or cracks are unnoticeable to the naked eye, but under boost pressure they open up leaking the desired charged air into the engine bay, and consequently can rob your S55 of it's full power potential. In addition, these leaks can trigger your S55's turbochargers to work harder to hit and maintain target boost pressure, potentially wearing them out sooner. Active uses silicone in this area because it will not contribute to heat soak and it's easier to mold for the correct clearances. Active uses a 5-layer silicone hose with all needed adapters and stainless hose clamps included. It fits perfectly with our CNC’d top-mount cooler.
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Genuine BMW - Corporate Logo
T#:380613
Part#: ECSE461711-4KT
Ships in 1 day
$ 800.99 USD
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$ 800.99 USD
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Genuine BMW - Corporate Logo
T#:577407
Part#: 171375429L2KT
Ships in 1 day
$ 1,669.22 USD
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$ 1,669.22 USD
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This cooling overhaul will cover just about everything you could replace on the 535's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N54 engine. But to properly maintain these cars for the long term, the rest of the cooling system must be refreshed and preventatively replaced. Here you can add a radiator, expansion tank, 535 cooling hoses, and the BMW antifreeze
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Genuine BMW - Corporate Logo
T#:557275
Part#: 11518635090KT2
Ships in 1 day
$ 1,305.00 USD
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$ 1,305.00 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:

  • Genuine BMW Thermostat
  • Genuine BMW Electric Water Pump
  • Genuine BMW coolant
  • Mounting hardware required for both the thermostat and water pump
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Genuine BMW - Corporate Logo
T#:577527
Part#: 11517846361KT
Ships in 1 day
$ 503.99 USD
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$ 503.99 USD
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This is and BMW water pump and thermostat replacement kit with coolant. Everything you need to service the most vital components and prevent overheating.
Genuine BMW - Corporate Logo
T#:374431
Part#: 17111741167KT
Ships in 1 day
$ 1,059.99 USD
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$ 1,059.99 USD
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Genuine BMW - Corporate Logo
T#:369667
Part#: ECSE461711-2
Ships in 4 Business Days
$ 1,090.99 USD
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$ 1,090.99 USD
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A Level 2 kit that includes belt service components

Genuine BMW - Corporate Logo
T#:574230
Part#: ECSE531711-2
Ships in 4 Business Days
$ 1,140.99 USD
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$ 1,140.99 USD
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A Level 2 kit that includes belt service components

Genuine BMW - Corporate Logo
T#:374432
Part#: 17111741167KT1
Ships in 1 day
$ 1,097.99 USD
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$ 1,097.99 USD
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Genuine BMW - Corporate Logo
T#:380612
Part#: ECSE461711-3KTKT
Ships in 1 day
$ 981.99 USD
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$ 981.99 USD
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