BMW Cooling System Parts & Accessories for BMW 5 Series E39 (1996-2003)

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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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Genuine BMW - Corporate Logo
T#:367652
Part#: 11527505302
Ships in 1-2 days
3% off MSRP $ 401.99

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

$ 388.99 USD
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3% off MSRP
$ 401.99

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

$ 388.99 USD
Free Shipping
Genuine BMW Water Pump for M62 4.4/4.6/4.8L Engine
For vehicles with production date from 09/1998
Genuine BMW - Corporate Logo
T#:360655
Part#: 11510393336
Ships in 1-2 days
6% off MSRP $ 500.99

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

$ 470.99 USD
Free Shipping
6% off MSRP
$ 500.99

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

$ 470.99 USD
Free Shipping

Ensure optimal engine performance with Turner Motorsport's High-Quality Water Pump for your BMW. This crucial component maintains smooth coolant circulation, preventing overheating issues. Replacing the water pump is essential to safeguard engine internals and prevent costly repairs.

Key Benefits:

  • Prevents overheating problems.
  • Safeguards engine internals.
  • Common issue addressed in German vehicles.
  • Vital for preventing unnecessary repair trips.
  • Guards against rapid coolant temperature rise.
  • Averts potential head gasket or piston ring failure.
  • Ideal preventative maintenance during timing belt replacement.

Don't risk engine damage; choose Turner Motorsport's Water Pump for reliable coolant circulation and engine protection.

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Genuine BMW - Corporate Logo
T#:6866
Part#: 11511742045
Ships in 1-2 days
1% off MSRP $ 91.99

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

$ 90.99 USD
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1% off MSRP
$ 91.99

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

$ 90.99 USD
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Genuine BMW Pulley - D=112mm
This item fits the following BMW Chassis:
E38,E39,E53 X5

Fits BMW Engines including:
M62


Genuine BMW - Corporate Logo
T#:367892
Part#: 17101440252
Ships in 1-2 days
3% off MSRP $ 156.99

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

$ 152.99 USD
3% off MSRP
$ 156.99

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

$ 152.99 USD

Genuine BMW - Corporate Logo
T#:35859
Part#: 11531406762
Ships in 1-2 days
3% off MSRP $ 382.99

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

$ 370.99 USD
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3% off MSRP
$ 382.99

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

$ 370.99 USD
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Genuine BMW Thermostat Housing
This item fits the following BMW Chassis:
E39 M5,E39

Fits BMW Engines including:
S62

Genuine BMW Radiator Hose - Lower - E38 740i 740iL E39 540i
For vehicles with production date up to 09/1998
Genuine BMW - Corporate Logo
T#:13006
Part#: 11531741409
Ships in 1-2 days
2% off MSRP $ 45.99

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

$ 44.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 45.99

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

$ 44.99 USD
Free Shipping on orders $49 and up
WATER HOSE:115050

Genuine BMW - Corporate Logo
T#:6944
Part#: 11531711381
Ships in 1-2 days
$ 34.99 USD
Free Shipping on orders $49 and up
This the the transmission cooling hose that goes from the radiator to the water pump. It also connects to the transmission cooling hose from cooler to water pump #11531711384.

We offer all these hoses in our Transmission Cooling Hose Kit

This hose set fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il
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Genuine BMW Radiator - Automatic - E39 540i E38 750iL 740iL 740i ...
For vehicles with automatic transmission and production date from 09/1998
Genuine BMW - Corporate Logo
T#:360739
Part#: 17111436063
Ships in 1-2 days
6% off MSRP $ 648.99

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

$ 610.99 USD
6% off MSRP
$ 648.99

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

$ 610.99 USD

Genuine BMW - Corporate Logo
T#:360748
Part#: 17111741167
In Stock
2% off MSRP $ 164.99

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

$ 160.99 USD
Free Shipping
2% off MSRP
$ 164.99

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

$ 160.99 USD
Free Shipping

This radiator expansion tank (coolant reservoir) is used on E39 540i from 1997-2003 and E38 740i 740il 750il from 1995-2001. It is a common failure item. 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. This OE BMW tank will give you a long life-span and will put your worries to rest of possible failure and coolant loss.

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!

This item fits the following BMWs:
1997-2003 E39 BMW 540i, 540i wagon
1995-2001 E38 BMW 740i 740il 750il
1990-1998 E31 BMW 840i 840ci 850i 850ci
2000-2003 E52 BMW Z8

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Genuine BMW - Corporate Logo
T#:360736
Part#: 17111427156
Ships in 1-2 days
3% 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.

$ 77.99 USD
Free Shipping on orders $49 and up
3% 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.

$ 77.99 USD
Free Shipping on orders $49 and up
Genuine BMW Water Pipe - E38 740i 740iL E39 540i
For vehicles with automatic transmission and a production date from 09/1998
Genuine BMW - Corporate Logo
T#:367678
Part#: 11531711384
Ships in 1-2 days
3% off MSRP $ 85.99

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

$ 82.99 USD
Free Shipping
3% off MSRP
$ 85.99

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

$ 82.99 USD
Free Shipping
Pierburg Auxiliary Water Pump - E65, E66
For vehicles with production date from 09/1998
Pierburg - Corporate Logo
T#:379284
Part#: 64116922699
Ships in 1-2 days
$ 130.27 USD
Free Shipping
$ 130.27 USD
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Improves coolant flow allowing hot air to blow while the engine is off


Genuine BMW Coolant Hose - E38 740i 740iL E39 540i
For vehicles with production date up to 09/1998
Genuine BMW - Corporate Logo
T#:360686
Part#: 11531745595
Ships in 1-2 days
2% off MSRP $ 45.99

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

$ 44.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 45.99

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

$ 44.99 USD
Free Shipping on orders $49 and up
Genuine BMW Heater Return Hose
For vehicles with production date up to 09/1998
Genuine BMW - Corporate Logo
T#:22318
Part#: 11531433059
Ships in 6 Business Days
2% off MSRP $ 252.00

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

$ 247.00 USD
Free Shipping
2% off MSRP
$ 252.00

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

$ 247.00 USD
Free Shipping


Genuine BMW Heater Return Pipe -
This item fits the following BMW Chassis:
E36,E39

Fits BMW Engines including:
M52,S52


Genuine BMW - Corporate Logo
T#:367653
Part#: 11527830486
Ships in 1-2 days
3% off MSRP $ 401.99

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

$ 388.99 USD
Free Shipping
3% off MSRP
$ 401.99

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

$ 388.99 USD
Free Shipping

Upgrade your BMW's cooling system with the Genuine BMW E39 M5 Radiator Fan Clutch from Turner Motorsport. This essential component ensures optimal engine temperature control by adjusting the fan speed based on the engine's rotational speed. If your vehicle tends to run hotter than desired in traffic, the fan clutch efficiently reduces rotational load and drag, providing a reliable solution.

Key Benefits:

  • Genuine BMW quality for precise fit and performance.
  • Enhances cooling system efficiency.
  • Adjustable fan speed for optimal engine temperature.
  • Reduces rotational load and drag when unneeded.
  • Ideal for vehicles with mechanical fans.
  • Effective solution for managing heat in traffic.

Upgrade your cooling system with Turner Motorsport's Genuine BMW E39 M5 Radiator Fan Clutch to keep your BMW running at the right temperature.

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Genuine BMW - Corporate Logo
T#:14858
Part#: 12521741900
Ships in 6 Business Days
6% off MSRP $ 82.99

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

$ 77.99 USD
Free Shipping on orders $49 and up
6% off MSRP
$ 82.99

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

$ 77.99 USD
Free Shipping on orders $49 and up


Genuine BMW Temperature Switch - 35 Cel
This item fits the following BMW Chassis:
E39 M5,E46 M3,E38,E39,E46,E53 X5 X5,E85 Z4

Fits BMW Engines including:
M52,M54,M56,M60,M62,M73,M73N,S54,S62

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Genuine BMW - Corporate Logo
T#:360664
Part#: 11527502804
Ships in 6 Business Days
3% off MSRP $ 401.99

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

$ 388.99 USD
Free Shipping
3% off MSRP
$ 401.99

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

$ 388.99 USD
Free Shipping
Genuine BMW Coolant Crossover Pipe
For vehicles with a production date from 09/1998
Genuine BMW - Corporate Logo
T#:35866
Part#: 11531437493
Ships in 9 Business Days
3% off MSRP $ 358.99

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

$ 347.99 USD
Free Shipping
3% off MSRP
$ 358.99

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

$ 347.99 USD
Free Shipping


Genuine BMW Cooling System Accumulator -
This item fits the following BMW Chassis:
E38,E39,E53 X5

Fits BMW Engines including:
M62


Genuine BMW Radiator Hose - Upper - E39 528i
For vehicles with production date up to 09/1998
Genuine BMW - Corporate Logo
T#:360683
Part#: 11531740832
Ships in 6 Business Days
$ 34.99 USD
Free Shipping on orders $49 and up
$ 34.99 USD
Free Shipping on orders $49 and up

Genuine BMW - Corporate Logo
T#:71302
Part#: 41148190207
Ships in 9 Business Days
$ 29.99 USD
Free Shipping on orders $49 and up


Genuine BMW Upper Water Valve/Add.Water Pump Bracket
This item fits the following BMW Chassis:
E39 M5,E39

Genuine BMW - Corporate Logo
T#:150804
Part#: 64218375524
Special Order: No Guaranteed ETA
4% off MSRP $ 49.99

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

$ 47.99 USD
Free Shipping on orders $49 and up
4% off MSRP
$ 49.99

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

$ 47.99 USD
Free Shipping on orders $49 and up


Genuine BMW Hose, Inlet, With Branch Piece -
This item fits the following BMW Chassis:
E39

Genuine BMW Motorsport - Corporate Logo
T#:1171
Part#: TMS1171
Ships in 9 Business Days
$ 415.45 USD
Free Shipping
$ 415.45 USD
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This is a genuine BMW Motorsport part, designed specifically for BMW racing applications. We use this exact thermostat setup in our Championship-winning E46 330i race car. It is designed to be used on all M54 and M52TU double-VAN0S engines, as used in the 1999-2000 E46 323/328 and 2001-2005 E46 325/330. This 60 degree C (140 defrees F) thermostat comes complete with plastic thermostat housing. It does not use the plug and wiring for the stock DME so this should only be used with an aftermarket engine management system (Motec, Bosch, etc).

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.
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Mahle - Corporate Logo
T#:12476
Part#: 11537511083
In Stock
$ 30.99 USD
Free Shipping on orders $49 and up
$ 30.99 USD
Free Shipping on orders $49 and up
OEM BMW THERMOSTAT:115040
Heater Inlet Pipe
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:594084
Part#: 11531705210
Ships on Nov 2, 2026
$ 47.46 USD
Free Shipping on orders $49 and up
Runs from the front left side of the engine to the heater inlet
Mahle-Behr - Corporate Logo
T#:361881
Part#: 17111702969
Ships on Nov 2, 2026
$ 310.99 USD
$ 310.99 USD
OEM replacement radiator for all 1997-1998 E39 5 Series (528i & 540i) as well as all 1995-1998 E38 7 Series (740i, 740iL & 750iL). This radiator is made by  BEHR , an original equipment supplier to BMW. This is the brand we use exclusively on our own 5 & 7 series BMWs, and think you should as well.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.​

This BEHR Radiator fits the following BMWs:
1997-1998  E39  528i (manual & automatic)
1997-1998  E39  540i (manual & automatic)
1995-1998  E38  740i & 740iL
1995-1997  E38  750iL
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CTA Tools - Corporate Logo
T#:641760
Part#: CTAA878
Ships on Nov 2, 2026
$ 23.57 USD
Free Shipping on orders $49 and up
Use to remove and install Fan Clutch Assemblies when replacing Water Pumps or doing other Engine Services

Gates Expansion Tank Hose - E39
For vehicles with production date from 09/1998
Gates - Corporate Logo
T#:591765
Part#: 11531438633
Ships on Nov 4, 2026
$ 59.99 USD
Free Shipping on orders $49 and up
$ 59.99 USD
Free Shipping on orders $49 and up
Runs from the expansion tank to auxiliary water pump
BMW Radiator Expansion Tank Pressure Fitting
Requires the use of a Motive Power Bleeder, sold separately
Motive - Corporate Logo
T#:380462
Part#: 1175
Ships in 8 Business Days
$ 24.99 USD
Free Shipping on orders $49 and up
Allows you to check for leaks in the coolant system

Febi Radiator Fan Clutch - E34, E36, E39, E46, E53, Z3
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:382395
Part#: 11527505302
Ships on Jan 14, 2027
$ 187.99 USD
Free Shipping
$ 187.99 USD
Free Shipping
Common source of engine overheating
Water Pump and Seal - with upgraded metal impeller - MEYLE
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:579324
Part#: 11517509985
Ships on Nov 6, 2026
$ 52.99 USD
Free Shipping on orders $49 and up

Ensure the optimal performance of your BMW by addressing the crucial component of the water pump. Turner Motorsport provides high-quality water pumps designed to keep coolant flowing smoothly. If left unchecked, a failing water pump can lead to overheating issues, potentially causing damage to engine internals. Common among German vehicles, water pump failure may result in unnecessary visits to the repair shop. Preventive maintenance, especially during timing belt replacements, is essential to avoid rapid coolant temperature rise and potential engine damage.

  • Prevents overheating issues
  • Guards against engine damage
  • Common replacement during timing belt maintenance
  • Ensures smooth coolant flow for optimal engine performance
  • Options for thermostats available on Turner Motorsport's website
  • Convenient coolant replacement options
  • Recommended replacement around 60,000 miles
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Meyle Coolant Expansion Tank - E36, E39, Z3
Up to production date 09/1998
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:556111
Part#: 17111723520
Ships on Nov 6, 2026
$ 34.99 USD
Free Shipping on orders $49 and up
$ 34.99 USD
Free Shipping on orders $49 and up
Does not include cap or coolant level sensor

Meyle Radiator Fan Clutch - E31, E32, E34, E38, E39
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:591319
Part#: 11527502804
In Stock
$ 101.99 USD
Free Shipping on orders $49 and up
OEM replacement
Meyle Water Pump - M62
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:579328
Part#: 11510393336
Ships on Nov 6, 2026
$ 106.99 USD
Free Shipping
$ 106.99 USD
Free Shipping
Don't take your car's cooling system for granted. A waterpump failure can cost you an engine, which is why preventatively replacing your BMWs waterpump and refreshing the cooling system every 60,000 miles. The water pump is a weak point is the cooling system. Replacing your waterpump will go a long way for keeping your car on the road and operating properly.
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Genuine BMW - Corporate Logo
T#:360662
Part#: 11521712058
Ships in 1-2 days
3% off MSRP $ 104.99

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

$ 101.99 USD
Free Shipping
3% off MSRP
$ 104.99

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

$ 101.99 USD
Free Shipping


Genuine BMW - Corporate Logo
T#:35937
Part#: 11531741202
Special Order: No Guaranteed ETA
6% off MSRP $ 100.99

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

$ 94.99 USD
Free Shipping
6% off MSRP
$ 100.99

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

$ 94.99 USD
Free Shipping


Genuine BMW Pipe -
This item fits the following BMW Chassis:
E38,E39,E53 X5

Fits BMW Engines including:
M62

Mahle-Behr - Corporate Logo
T#:359934
Part#: 17111436381
Back Ordered
$ 57.51 USD
Free Shipping on orders $49 and up

This radiator expansion tank is used on E39 528i 525i 530i from 1999-2003. It is a common failure item. 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. OEM Hella/Behr brand.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

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!

This item fits the following BMWs:
1999-2003 E39 BMW 525i 528i 530i

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Sachs - Corporate Logo
T#:591739
Part#: 11527505302
Back Ordered
$ 231.08 USD
Free Shipping
$ 231.08 USD
Free Shipping
Common source of engine overheating

Moroso Performance Aluminum Expansion Tank - E36, Z3
For vehicles with a production date before 09/1998
Moroso - Corporate Logo
T#:568887
Part#: 63791
In Stock
$ 445.99

This product was last offered at the strikethrough price on
08-07-2026

$ 418.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 445.99

This product was last offered at the strikethrough price on
08-07-2026

$ 418.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
If you have ever experienced a leaking plastic BMW expansion tank you will realize the value of this aluminum version straight away. Even if a failure has not happened to you, it's easy to tell this tank is much stronger and more durable than the plastic used in the stock design. The original BMW plastic tanks suffer from leaks and failures with no warning. While being lightweight and recyclable the design and construction of the stock tank is just not up for reliable long term use. Moroso coolant expansion tanks are all pressure tested for guaranteed leak-free operation and utilizes the stock pressure cap to prevent excessive pressure in the cooling system from blowing off a radiator hose or seal! Features: Each cooling system expansion tank includes a 1/8 in. pipe overflow fitting at neck, a 1/4 in. NPT water intake bung, and a 1/2 in. bung at the bottom for plumbing a line to the radiator Rugged 6061-T6 billet aluminum filler necks welded to tank to withstand continuous removal and installation of cap 100% pressure tested to eliminate leaks Accepts a standard-size radiator cap
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Temperature Sensor
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:37892090
Part#: 13621433076
In Stock
$ 10.34 USD
Free Shipping on orders $49 and up
Temperature sensor for monitoring coolant and oil
Bremmen Parts - Corporate Logo
T#:640140
Part#: 17111712788
Ships on Jan 11, 2027
Sale - Save 39% $ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD
Free Shipping on orders $49 and up
Sale - Save 39%
$ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD
Free Shipping on orders $49 and up
Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

URO Parts Thermostat Assembly - 11537509227
For vehicles with production date from 09/1998
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:29466801
Part#: 11537509227
In Stock
$ 41.99 USD
Free Shipping on orders $49 and up
$ 41.99 USD
Free Shipping on orders $49 and up

The thermostat cover in your BMW, made from plastic, is notorious for failing. After years of exposure to hot coolant, the plastic can crack, leading to significant coolant leaks and potential engine overheating.

URO Parts offers a superior solution with their high-quality thermostat cover, designed to surpass the durability of the original factory part. This replacement thermostat comes complete with a gasket for an effortless service.

Features:

Perfect Fit: Guaranteed fitment ensures a seamless replacement process. Optimal Cooling: High-flow OE-style design ensures efficient engine cooling performance. Easy Installation: Manufactured to factory housing dimensions for straightforward bolt-on installation and secure hose connections. Comprehensive Design: Includes ports for temperature sensors where applicable. Superior Materials: Constructed from high-quality alloy or composite materials that resist temperature-induced warping or cracking, preventing coolant leaks. URO Parts, with over 8,000 premium spare parts, specializes in manufacturing precise, durable replacements for factory BMW components. Committed to the highest standards of precision, materials, and workmanship, each part is rigorously tested to deliver the best combination of durability, functionality, and affordability. For reliable replacement parts that offer great value, choose URO Parts.

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Radiator Mount Support - Upper
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:377277
Part#: 17111712911
In Stock
$ 1.67 USD
Free Shipping on orders $49 and up
Secures the upper radiator bracket to core support.

Rein Coolant Bleeder Screw CHW1575 - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591955
Part#: 17111712788
In Stock
$ 4.99 USD
Free Shipping on orders $49 and up
Coolant Bleeder Screw is a critical component for maintaining your BMW’s cooling system. Designed to release trapped air from the coolant lines, this screw ensures efficient coolant flow and prevents overheating. Specifically engineered for BMW models, it enhances the overall performance and longevity of your engine by maintaining proper temperature regulation. Comes with O-Ring.
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Bremmen Auxiliary Fan Temperature Switch - E46 E39 E9X E60 E70 E53 ...
For vehicles with production date from 09/1998
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:640141
Part#: 13621433077
In Stock
Sale - Save 20% $ 20.99

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

$ 16.79 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 20.99

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

$ 16.79 USD
Free Shipping on orders $49 and up
The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary
Genuine BMW - Corporate Logo
T#:152340
Part#: 64538361938
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
Limited Qty Sale
Free Shipping on orders $49 and up
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
Limited Qty Sale
Free Shipping on orders $49 and up


Genuine BMW Bush
This item fits the following BMW Chassis:
E39 M5,E38,E39

URO Water Pump O-Ring (Small) - BMW M60 M62 S62 M70 S70
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:377294
Part#: 11531710055
In Stock
$ 1.01 USD
Free Shipping on orders $49 and up
When it comes time to replace the water pump, be sure to replace all the O-Rings associated with it to ensure that your car stays leak free. If you are experiencing leaking issues, be sure to inspect these rings, as they might have worn down. This specific ring is used when replacing water pump on cooling pipe to the water accumulator. There are two per car.
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3/8"/9mm Band Hose Clamp - 50-70mm
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:341684
Part#: 003402ECS06A-12
In Stock
Sale - Save 25% $ 6.99

This product was last offered at the strikethrough price on
06-13-2026

$ 5.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 6.99

This product was last offered at the strikethrough price on
06-13-2026

$ 5.24 USD
Free Shipping on orders $49 and up
Elevate your BMW maintenance with ECS Tuning's 304 stainless steel hose clamps, offering convenience and top-quality performance at an affordable price. Designed with various band widths and German-style T-bolts for adjustable sizing, these hose clamps ensure a secure fit for your specific diameter needs. Skip the dealership wait and excessive pricing; ECS Tuning provides reliable, dealership-quality hose clamps without the premium cost, ensuring your car receives the care it deserves.
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1/2"/12mm Band Hose Clamp - 25-40mm - Priced Each
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:385425
Part#: 003402ECS05A-06
In Stock
Sale - Save 25% $ 4.99

This product was last offered at the strikethrough price on
06-13-2026

$ 3.74 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 4.99

This product was last offered at the strikethrough price on
06-13-2026

$ 3.74 USD
Free Shipping on orders $49 and up

Upgrade Your BMW Maintenance with Stainless Steel Hose Clamps from ECS Tuning

ECS Tuning introduces premium full stainless steel hose clamps, offering superior quality and convenience for your BMW maintenance. Avoid dealership delays and overpricing by choosing from a selection of band widths, ensuring you receive top-quality hose clamps without overpaying.

Key Benefits:

  • Premium full stainless steel hose clamps
  • Various band widths for enhanced convenience
  • High-quality alternative to dealership pricing
  • Readily available stock eliminates waiting time
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