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Genuine BMW - Corporate Logo
T#:7459
Part#: 17127527131
Ships in 1-2 days
6% off MSRP $ 134.99

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$ 126.99 USD
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6% off MSRP
$ 134.99

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$ 126.99 USD
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Genuine BMW Line, Heater Return - Thermostat -
This item fits the following BMW Chassis:
E90,E92

Fits BMW Engines including:
N51,N52,N52N

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#:46257
Part#: 17127565094
In Stock
6% off MSRP $ 79.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 74.99 USD
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6% off MSRP
$ 79.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 74.99 USD
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Replacement radiator vent hose. This is located on the top of the radiator and acts as a vent for the cooling system.

Genuine BMW Vent Line For Radiator, Top -
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93

Fits BMW Engines including:
N20,N54,N54T,N55

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Genuine BMW - Corporate Logo
T#:636029
Part#: 11518482250
Ships in 1-2 days
8% off MSRP $ 200.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 183.99 USD
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8% off MSRP
$ 200.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 183.99 USD
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Genuine BMW - Corporate Logo
T#:36680
Part#: 11618506078
In Stock
6% off MSRP $ 283.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 265.99 USD
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6% off MSRP
$ 283.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 265.99 USD
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The charge air lines in your vehicle direct charged air into your vehicles cylinders and any leaks or cracks can cause performance issues. Replace these at any signs of failure! Genuine BMW Charge Air Line - This item fits the following BMW Chassis: E90 Fits BMW Engines including: M57
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Genuine BMW - Corporate Logo
T#:222845
Part#: 11538658571
In Stock
7% off MSRP $ 14.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 13.99 USD
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7% off MSRP
$ 14.99

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$ 13.99 USD
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Gasket that goes between the thermostat and radiator return pipe. Gaskets and seals are a wear item that should be replaced in conjunction with associated parts.

Genuine BMW - Corporate Logo
T#:47128
Part#: 17428508253
Ships in 1-2 days
6% off MSRP $ 1,208.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1,134.99 USD
6% off MSRP
$ 1,208.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1,134.99 USD


Genuine BMW Fan Housing With Fan - 850W
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93

Fits BMW Engines including:
M57,N54T

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Nissens - Corporate Logo
T#:591348
Part#: 17117823568
In Stock
Sale - Save 13% $ 212.43

This product was last offered at the strikethrough price on
02-17-2026

$ 184.10 USD
Sale - Save 13%
$ 212.43

This product was last offered at the strikethrough price on
02-17-2026

$ 184.10 USD
More than likely, you are going to replace the radiator in your vehicle at least once. The joints where the cores meet the end tanks tend to get weak and are the first place to spring a leak. Impacts to the fins themselves can cause holes to form. Corrosion and clogging from the inside can make cooling less than effective and compromise coolant flow. Genuine BMW Radiator - This item fits the following BMW Chassis: F25 X3,F26 X4 Fits BMW Engines including: N20,N55
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Genuine BMW - Corporate Logo
T#:45775
Part#: 17111737713
In Stock
11% off MSRP $ 25.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 23.99 USD
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11% off MSRP
$ 25.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 23.99 USD
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Genuine BMW Rubber Strip - L=621mm
This item fits the following BMW Chassis:
E39 M5,E38,E39

Fits BMW Engines including:
M52,M54,M60,M62,M73,M73N,S62

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OEM Elring Coolant Pipe Gasket - E90 E70 M57 3.0L
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Elring - Corporate Logo
T#:2706176
Part#: 11122247745
In Stock
$ 12.99

This product was last offered at the strikethrough price on
04-22-2026

$ 8.99 USD
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$ 8.99 USD
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For the water connecting pipe attached to the head.
Genuine BMW - Corporate Logo
T#:219994
Part#: 17128651271
In Stock
13% off MSRP $ 7.99

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$ 6.99 USD
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13% off MSRP
$ 7.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 6.99 USD
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Genuine BMW Hose Clamp - 17128651271
Coolant Hose - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:594295
Part#: 11537580969
In Stock
$ 25.91

This product was last offered at the strikethrough price on
07-17-2026

$ 20.99 USD
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$ 20.99 USD
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Comes off the coolant pump. Replacement from Rein.


Packaged by Turner - Corporate Logo
T#:557236
Part#: E46M5XBCKT
In Stock
Sale - Save 8% $ 438.99

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

$ 403.26 USD
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Sale - Save 8%
$ 438.99

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

$ 403.26 USD
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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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Genuine BMW - Corporate Logo
T#:624478
Part#: 17128654824
In Stock
5% off MSRP $ 57.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 54.99 USD
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5% off MSRP
$ 57.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 54.99 USD
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This coolant hose connects your cylinder head to your expansion tank. Replace your cracked or split coolant expansion tank hose to prevent coolant and pressure loss in your cooling system.
Mishimoto - Corporate Logo
T#:51075086
Part#: MMTS-E46-99E
In Stock
New Item
$ 91.99 USD
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The Mishimoto Thermostat Assembly focuses on precision fitment and long-term durability.

Nissens - Corporate Logo
T#:341244
Part#: 17112241913
In Stock
$ 221.99

This product was last offered at the strikethrough price on
06-29-2026

$ 183.99 USD
Limited Qty Sale
$ 221.99

This product was last offered at the strikethrough price on
06-29-2026

$ 183.99 USD
Limited Qty Sale
​This radiator is made by Nissens, an original equipment supplier to BMW. The cooling system is a weak point on most BMWs, causing many BMWs to develop issues in as few as 50,000 miles. Overheating your engine can and usually will result in large repair bills and sometimes a warps the cylinder head(s), requiring intensive repair or full replacement. Prevent potential failure by replacing your radiator early, keeping your BMW happy and cool. This is the brand we use exclusively on our own BMWs, and think you should as well! 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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Genuine BMW - Corporate Logo
T#:178142
Part#: 11537598234
In Stock
9% off MSRP $ 80.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 73.99 USD
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9% off MSRP
$ 80.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 73.99 USD
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Genuine BMW Coolant Hose -
This item fits the following BMW Chassis:
F22,F30,F32,F33,F34,F36

Fits BMW Engines including:
N55

Genuine BMW - Corporate Logo
T#:181006
Part#: 11537843273
Ships in 1-2 days
4% off MSRP $ 124.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 119.99 USD
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4% off MSRP
$ 124.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 119.99 USD
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Genuine BMW Connecting Line -
This item fits the following BMW Chassis:
F06,F10,F12,F13

Fits BMW Engines including:
S63N


Genuine BMW - Corporate Logo
T#:150726
Part#: 64216902679
In Stock
3% off MSRP $ 35.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 34.99 USD
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3% off MSRP
$ 35.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 34.99 USD
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Genuine BMW Hose F Water Valve And Radiator
This item fits the following BMW Chassis:
E46 M3,E46

Genuine BMW - Corporate Logo
T#:15130
Part#: 17127537717
Ships in 1-2 days
3% off MSRP $ 97.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 94.99 USD
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3% off MSRP
$ 97.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 94.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Genuine BMW radiator hoses are always a perfect option when performing maintenance thanks to their high quality and longevity.

This item fits the following BMW Chassis:
E85,E86

Fits BMW Engines including:
N52

 

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Meyle Coolant Expansion Tank - E53 X5, E46 M52/54, E83 X3
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:369184
Part#: 17117573781
In Stock
$ 66.99 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.

Other items to consider replacing at the same time are the radiator cap, coolant level sensor, lower radiator hose, coolant temp sensor, and the hose clamps. If your car has an automatic transmission you should also replace the oil cooler thermostat in the radiator frame, which is a common source for leaks.

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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Rein Expansion Tank Hose - E31, E38, E39
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:375756
Part#: 11531741404
In Stock
$ 8.45 USD
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Connects the expansion tank to the radiator
BMW E39 Coolant Expansion Tank
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:388645
Part#: 17111436381
In Stock at Vendor
$ 87.99 USD
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$ 87.99 USD
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BMW E39 Coolant Expansion Tank is an essential component designed to maintain the proper coolant level in your vehicle's cooling system. Manufactured with high-quality materials, this expansion tank ensures reliable performance and durability, preventing engine overheating by accommodating the expansion of coolant as it heats up. The kit includes a level sensor and cap, providing everything needed for a seamless installation. This expansion tank is specifically engineered to meet the exact specifications of your BMW E39, offering a perfect fit and optimal functionality.

  • Complete Kit: Includes level sensor and cap for easy installation.
  • High-Quality Construction: Built with durable materials for long-lasting performance.
  • Prevents Overheating: Helps manage coolant expansion, ensuring engine protection.
  • Exact Fit: Designed to meet the precise specifications of your BMW E39.
  • Enhanced Reliability: Ensures proper coolant level maintenance for optimal cooling system function.
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Genuine BMW - Corporate Logo
T#:368719
Part#: 64211386690
In Stock
3% off MSRP $ 74.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 72.99 USD
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3% off MSRP
$ 74.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 72.99 USD
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URO Parts Expansion Tank Hose - 17128651298
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:29002183
Part#: 17128651298
In Stock
$ 19.99 USD
Free Shipping on orders $49 and up

A leaking expansion tank hose can quickly lead to coolant loss, posing a potential overheating risk. This hose is inexpensive and easy to replace, making it a simple repair anyone can perform in minutes.

Features:

Guaranteed fitment Precision-molded to OE recovery tank hose shape for easy installation Resistant to engine heat and ozone Made from durable ECD (Electro Chemical Degradation)-resistant EPDM material, preventing electrolysis from degrading the rubber internally Temperature rating: -40º F to 275º F (-40º C to 135º C) 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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Geba - Corporate Logo
T#:36303282
Part#: 11517597715
Ships on Aug 31, 2026
$ 343.99 USD
Free Shipping on orders $49 and up

BMW F30 Water Pump plays a crucial role in the vehicle's cooling system, directly impacting performance and fuel efficiency. Designed to manage engine cooling, this water pump also supports turbo and transmission cooling, making it an essential component of the engine. BMW has engineered this smart electric water pump with increased output to meet the high cooling demands of the N20/N26 engines, which face additional stress due to the factory intercooler, tight engine bay, and heat from the turbochargers.

  • Enhanced Cooling Performance: Ensures effective cooling of the engine, turbo, and transmission.
  • Smart Electric Design: Features a dynamic electric pump with increased output compared to normally aspirated models.
  • Engine Efficiency: Balances engine power output and cooling responsibilities for optimal performance.
  • Fits Multiple Models: Compatible with 2012+ BMW F30 320i

This water pump is a critical upgrade for maintaining engine health and performance.

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Coolant Hose
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:639233
Part#: 11531247398
Back Ordered
$ 11.99 USD
Free Shipping on orders $49 and up
Replace your leaking hose

Genuine BMW - Corporate Logo
T#:153200
Part#: 65128368216
In Stock
8% off MSRP $ 25.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 23.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 25.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 23.99 USD
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Genuine BMW Bracket F On Bord Monitor Radio
This item fits the following BMW Chassis:
E39 M5,E39


OEM Rein Expansion Tank - F01,F06,F10,F12,F13
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:555024
Part#: 17137647283
Ships in 2 Business Days
$ 118.99 USD
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$ 118.99 USD
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Replace your damaged expansion tank to prevent coolant loss or potential overheating issues.

his item fits the following BMW Chassis:
F01,F02,F06,F10,F12,F13

Fits BMW Engines including:
N54,N55,N57N

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Packaged by Turner - Corporate Logo
T#:557224
Part#: E9X328MBCKT
In Stock
Sale - Save 5% $ 674.60

This product was last offered at the strikethrough price on
04-17-2026

$ 639.87 USD
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Sale - Save 5%
$ 674.60

This product was last offered at the strikethrough price on
04-17-2026

$ 639.87 USD
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Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

Show More Show Less

Genuine BMW - Corporate Logo
T#:360751
Part#: 17117558480
In Stock
11% off MSRP $ 475.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 431.99 USD
Limited Qty Sale
11% off MSRP
$ 475.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 431.99 USD
Limited Qty Sale
Genuine BMW - Corporate Logo
T#:623
Part#: 11517527799
Ships in 4 Business Days
6% off MSRP $ 254.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 239.99 USD
Free Shipping
6% off MSRP
$ 254.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 239.99 USD
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The early M50/M52 engines had a serious weak point: the water pump. BMW originally used a plastic impeller in the water pump. This would degrade over time and eventually break apart. Your car overheats immediately. This water pump is the latest updated part with a composite impeller. The composite is stronger and lighter than the less-expensive metal impeller version. And it does not suffer from the problems of the early plastic design.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This waterpump fits the following BMWs:
1992-1999 E36 3 series - 323is, 323ic, 325i, 325is, 325ic, 328i, 328ic, M3 3.0 (S50/US), M3 3.2 (S52)
1991-1995 E34 BMW 525i
1997-1998 E39 5 series - 528i
1996-1998 Z3 - Z3 2.8,
1998-2000 Z3 Roadster/Coupe - M Roadster, M Coupe (S52)
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Packaged by Turner - Corporate Logo
T#:340245
Part#: TMS214380
In Stock
Sale - Save 24% $ 426.99

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

Starting at $ 322.55 USD
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Sale - Save 24%
$ 426.99

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

Starting at $ 322.55 USD
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This cooling overhaul will cover just about everything you could replace on the 325/330's cooling system. We start with the basic water pump and thermostat bundle. These are already vital to the health and durability of the N52 325/330i. 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, all of the 325/330 cooling hoses, and the BMW antifreeze. This package fits 325i/330i/xi with N52 engine and automatic transmission. Some of the components are different for the automatic models because of the auto transmission oil cooler.

The sophisticated electronics of the ECU and water pump means catastrophic overheating should be a thing of the past. But the downside is that the electronics can shut down without any warning or symptoms. And troubleshooting is equally frustrating since the water pump electronics are not readable or serviceable. There are several clues to a faulty thermostat or water pump - the fan runs at full speed all the time (even immediately on a cold start), pending (soft) fault code for low coolant flow, or the water pump can be heard running constantly. But when the pump fails it's an immediate shut down of the engine which can be a major inconvenience and lead to additional repairs that might have been avoided with preventative maintance. We recommend a full cooling system overhaul on the E90/E92 every 80-90,000 miles and to check for soft/pending codes at every 5,000 mile service .


Base Cooling Overhaul Package - Water Pump and Thermostat
(click to expand)
Includes:
+ Genuine BMW electric water pump, p/n 11517586925
+ mounting screws for water pump (set of 3), p/n 11510392553
+ OEM Behr thermostat, p/n 11537549476
+ Original BMW connecting hose from thermostat to water pump, p/n 11537521049
+ OEM-style hose clamps for hose (x 2)

The water pump on the N52 engine has more cooling responsibilities than ever before. The good news is that the pump only works when, and only as much, as it needs to. That means the system can actually stop the pump when it doesn't need to be running. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. The preventative replacement is your only insurance from a very inconvenient and costly breakdown in the future. Plus you get the very latest BMW water pump design with any improvements they've made since your original pump was installed.
Cooling Hoses
(click to expand)
With regular driving the hoses should last a very long time. Even the plastic connectors seem to be holding up well. But as a preventative measure new hoses are recommended. We have also seen issues with re-using hoses as the spring connectors get weak over time and may not have the strength to hold the hose in place. They seem to have a tough time holding tension especially when they have been removed and reinstalled. In the interests of a thorough overhaul we recommend replacing these 325/330 water hoses during this job (see diagram):
  • 17127531579, upper radiator hose
  • 17127531581, lower radiator hose
  • 11537613176, water pump to engine
  • 11537534880, gasket for #176 hose
  • 11537545890, thermostat to cylinder head (includes new o-ring)
  • 17117524710, radiator to auto trans cooler
    There are other hoses too but they are not often replaced during a radiator swap (radiator vent hose and heater core hose) and they don't see much wear. We offer these as well if you want a complete set (see Additional Items at the bottom of the page).
Expansion Tank Options
(click to expand)
The expansion tank on the 325/330 is not prone to failures (unlike previous 3-series cars) so a new one is not strictly required. There aren't many seams or stress points for it to crack and we haven't heard of too many issues. But we wanted to offer it as part of a complete overhaul in case you want to cover everything. Simiarly, the level sensor is not required unless you're getting erroneous 'low coolant' warnings from the dash/iDrive. We do strongly recommend replacing the cap because that is designed to be the weak point in the system. The cap is what regulates the pressure inside the system and it should be replaced every few years anyway.
Coolant Temp Sensors
(click to expand)
There are two coolant temp sensors on the E90 325/330 - in the lower radiator hose and in the cylinder head. Both feed coolant temps to the ECU to regulate the water pump and cooling fan. You should replace the one in the lower radiator hose because it's one of the main sources for coolant leaks, especially when the old sensor is re-used in a new hose. The sensor in the cylinder head is not as prone to leaks and it's easily accessible so you don't have to replace it right away. But we offer it with the package in case you want to have a complete cooling system overahul.
13621433077, coolant temp sensor (in lower radiator hose)
13621433076, coolant temp sensor (in cylinder head, next to oil filter housing)

BUY AS A PACKAGE AND SAVE $$!

This cooling package fits the following BMWs with the N52 engine and an auto transmission:
2006-2006 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2006 E91 BMW 325xi - Wagon


Note: not for cars that have the dealer-installed auxiliary heating option. Some of the hoses are different with that option. It's not a very common option in North America (except in parts of Canada) but there are hoses that are specific to that option.


Click on the options for your kit below and then click "update price" for your kit total.
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Febi - Corporate Logo
T#:377229
Part#: 17132754264
In Stock at Vendor
$ 11.99

This product was last offered at the strikethrough price on
06-08-2026

$ 9.17 USD
Free Shipping on orders $49 and up
$ 9.17 USD
Free Shipping on orders $49 and up
Replace the expansion tank cap for your MINI / BMW
Genuine BMW - Corporate Logo
T#:36117
Part#: 11537628010
In Stock
9% off MSRP $ 128.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 117.99 USD
Free Shipping
9% off MSRP
$ 128.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 117.99 USD
Free Shipping


Genuine BMW Coolant Hose -
This item fits the following BMW Chassis:
F30,F32,F33,F36

Fits BMW Engines including:
N55

Genuine BMW - Corporate Logo
T#:360690
Part#: 11537511083
Ships in 1-2 days
3% off MSRP $ 107.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 104.99 USD
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3% off MSRP
$ 107.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 104.99 USD
Free Shipping


Mishimoto - Corporate Logo
T#:384864
Part#: MMRAD-E46-323A
In Stock
$ 539.99 USD
$ 539.99 USD

Discover Mishimoto's solution, perfect for both daily drivers seeking a reliable OEM radiator upgrade and dedicated racers requiring a high-performance racing radiator. This high-quality aluminum radiator serves as a crucial cooling system component, offering larger coolant capacity and increased surface area for superior heat dissipation compared to OEM plastic.

The aluminum construction ensures enhanced durability, backed by Mishimoto's lifetime warranty, potentially making this radiator your last purchase!

Key Features:

  • Fully brazed aluminum core with TIG-welded end tanks
  • Compatible with stock clutch fan or Mishimoto electric fan shroud
  • Precision-designed CNC-machined quick-disconnect fittings for perfect hose compatibility
  • Track-tested design for reliability
  • 18% increase in coolant surface area
  • 41% increase in air surface area
  • 20% increase in coolant capacity

*WARNING: Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) may apply to this product. For more information about California Prop 65 warning, visit www.P65Warnings.ca.gov.*

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Water Pipe
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:594365
Part#: 11537502000
In Stock
$ 39.99 USD
Free Shipping on orders $49 and up
Water pipes 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. This water pipe runs from the back of the water pump housing to the expansion tank hose. Includes all required seals, needed for the install.
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URO Radiator Hose - E38, E39
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:38094316
Part#: 11531711385
Ships in 2 Business Days
$ 47.99 USD
Free Shipping on orders $49 and up
This radiator hose is routed from the lower left of the radiator and goes to the heat exchanger.

Genuine BMW - Corporate Logo
T#:45825
Part#: 17112248408
In Stock
2% off MSRP $ 97.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 95.99 USD
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2% off MSRP
$ 97.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 95.99 USD
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Genuine BMW Mounting Plate -
This item fits the following BMW Chassis:
E85,E86

Fits BMW Engines including:
M54,N52


Coolant Expansion Tank
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591959
Part#: 17111741167
Ships in 2 Business Days
$ 69.99 USD
Free Shipping
$ 69.99 USD
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Plastic has a limited lifespan - replace every 80,000 miles
Febi Coolant Expansion Tank - E36, E39, Z3
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:363759
Part#: 17111723520
Ships on Oct 29, 2026
$ 54.99 USD
Free Shipping on orders $49 and up
$ 54.99 USD
Free Shipping on orders $49 and up
Does not include cap or coolant level sensor

Reboot Engineering - Corporate Logo
T#:590256
Part#: E34RS-1
In Stock
Sale - Save 4% $ 54.99

This product was last offered at the strikethrough price on
05-15-2026

$ 52.73 USD
Free Shipping on orders $49 and up
Sale - Save 4%
$ 54.99

This product was last offered at the strikethrough price on
05-15-2026

$ 52.73 USD
Free Shipping on orders $49 and up
These radiator stays are constructed from 6061 Aluminum and are finished in Black to blend into your engine bay. Each stay is a two-piece assembly that clamps onto the core support. This radiator stay upgrade also includes stainless steel hardware required for installation.
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Expansion Tank Mounting Plate
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:402140
Part#: 17111436250
In Stock
$ 70.99 USD
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$ 70.99 USD
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Packaged by Turner - Corporate Logo
T#:5498481
Part#: E46M5X2KT
In Stock
Sale - Save 4% $ 474.99

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

$ 456.76 USD
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Sale - Save 4%
$ 474.99

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

$ 456.76 USD
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Prevent cooling issues and take service of your cooling system one step further with a Turner Motorsport Level 2 Cooling System Maintenance Kit. The experts at Turner have identified all of the common parts that fail on a BMW and included them all in this convenient kit. BMW has been designing notoriously failure-prone cooling systems since the late 1980s. The coolant capacity in most BMW engines is not sufficient to accommodate any driving or overheating near red zone temperatures. If the coolant reaches this critical temperature, it is common for thousands of dollars in damage to occur. Stop the problems before they arise. If your BMW has 80,000 miles or more, replace all of these components to ensure that your vehicle stays healthy. Avoid water pump failure, cracked thermostat housings, and expansion tank leaks, which all lead to overheating and subsequent damage. This kit was put together by Turner for a complete cooling system service. GEBA water pump with metal impeller Ecs aluminum water pump pulley Fan switch Thermostat and thermostat housing Sealing gaskets Expansion tank with level sensor, clamp and cap 1 Gallon Coolant Upper & lower radiator hoses Accessory drive belts Radiator drain plug
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Genuine BMW - Corporate Logo
T#:22520
Part#: 17122282954
In Stock
7% off MSRP $ 57.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 53.99 USD
Limited Qty Sale
Free Shipping
7% off MSRP
$ 57.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 53.99 USD
Limited Qty Sale
Free Shipping


Genuine BMW Vent Pipe
This item fits the following BMW Chassis:
E60 M5,E63 M6,E63

Fits BMW Engines including:
S85

Graf - Corporate Logo
T#:594768
Part#: 11510007043
In Stock
Sale - Save 17% $ 116.71

This product was last offered at the strikethrough price on
05-11-2026

$ 97.38 USD
Free Shipping
Sale - Save 17%
$ 116.71

This product was last offered at the strikethrough price on
05-11-2026

$ 97.38 USD
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Genuine BMW - Corporate Logo
T#:206334
Part#: 11537848507
In Stock
4% off MSRP $ 219.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 210.99 USD
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4% off MSRP
$ 219.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 210.99 USD
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This is the hose that runs from the turbochargers back to the coolant pump.


CSF High-Performance Auxiliary Radiator - A90/G20/G29
2X Entries For Our G87 M2 Sweepstakes!
CSF - Corporate Logo
T#:5802174
Part#: 8179
In Stock
$ 349.00 USD
Free Shipping
$ 349.00 USD
Free Shipping
CSF is one of the premier cooling product specialists available on the market thanks to designs such as their High Performance Aluminum Radiators. Using that knowledge, they have developed this set of high-performance radiators that far surpass the abilities of the stock units. These radiators feature 2-row, 42mm High performance cores with 6.5mm tall multi-louvered fins. The units have also been machined with OE quick connect inlets and outlets. Composed of 100% aluminum which also features an aluminum rock guard and finished in thermal black protective coating. Designed for an OEM fitment with no further modification required. Features: Fits Both Left & Right Side of Vehicle 2-Year Limited Warranty Tested and Proven by CSF’s Global Network of R&D Partners, Including Leading Time Attack Teams, Tuners, and Turbo Kit Manufacturers
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Genuine BMW - Corporate Logo
T#:36030
Part#: 11537558903
In Stock
Sale - Save 20% $ 115.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 93.28 USD
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Sale - Save 20%
$ 115.99

This product was last offered at the strikethrough price on
05-02-2026

$ 93.28 USD
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Genuine BMW Pipe, Return, Cooling For Turbocharger - Zyl. 4-6
This item fits the following BMW Chassis:
E82 1M Coupe,E82

Fits BMW Engines including:
N54,N54T

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