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BMW Cooling System Parts & Accessories for BMW 7 Series E38 (1995-2001)

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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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Complete Cooling System Overhaul Package - 1999-2003 E39 540i, 1999-2...

T#:338704

Part#: TMS14417

Ships on Sep 16, 2026

Sale - Save 7% $ 773.99

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

Starting at $ 723.61 USD

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Sale - Save 7%

$ 773.99

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

Starting at $ 723.61 USD

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This is a compete cooling system overhaul kit, which includes all the common cooling system failure parts bundled into a complete package. This cooling system package is for the 1999-2003 540i with the M62TU VAN0S 4.4-liter engine. This package applies to cars equipped with either the manual or automatic transmission (select the appropriate parts in the menu below).

A failure in the cooling system can lead to overheating and catastrophic engine failure. Don't gamble your engine! By replacing these core items preventatively, such as the thermostat housing, radiator, and waterpump, you are defusing what could be a ticking cooling system time bomb. And if you've had a failure of one of these parts, now is the time to refresh your entire cooling system. Our bundled package includes the following:

OEM Behr radiator (select for manual or automatic transmission)

OEM water pump (choose either the metal or composite impeller)

OE BMW coolant temp sensor (located in the water pump housing)

OEM Behr thermostat with housing and sensor

OEM Behr expansion tank with cap

OE BMW upper and lower radiator hoses with expansion tank hose
Optional items (which can be added below):
- OE BMW antifreeze
- Add a new coolant level sensor (known for failing / throwing "check coolant" messages)
- Replace the heat exchanger coolant lines for the automatic transmission
- Add a new fan clutch

Buy as a package and save $$$!

This cooling system overhaul kit fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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Water Pump - E39 540i E38 740i/il E53 X5 4.4i 4.6is

T#:348558

Part#: 11510393336DK

Ships in 3 Business Days

$ 192.99

This product was last offered at the strikethrough price on
07-15-2026

Starting at $ 132.98 USD

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Starting at $ 132.98 USD

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Don't take your car's cooling system for granted!One of the biggest weak points is the cooling system. Replacing your water pump will go a long way for keeping your car on the road and operating properly. This water pump fits BMW 1999-2001 E38 740i/740iL, 1999-2003 E39 540i, 1999-2003 E53 X5 4.4i and 4.6is with M62TU 4.4L (4.6L for the 4.6is) engine.

Choose from a water pump with a metal or composite impeller.
This water pump comes complete with housing profile gasket and o-rings.

This item fits the following BMWs:
1999-2003 E39 BMW 540i 540i touring
1999-2001 E38 BMW 740i 740il
2000-2003 E53 BMW X5 4.4i X5 4.6is
2000-2003 E52 BMW Z8 Alpina

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Transmission Cooler Hose Set - E39 540i 99-03, E38 740i/iL 99-01 ...

T#:338705

Part#: TMS16592

Ships in 3 Business Days

Sale - Save 5% $ 171.99

This product was last offered at the strikethrough price on
08-13-2026

Starting at $ 163.48 USD

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Sale - Save 5%

$ 171.99

This product was last offered at the strikethrough price on
08-13-2026

Starting at $ 163.48 USD

Add to Wish List

The oil cooler/heat exchanger for the automatic transmission is one of the most overlooked sections of the 540i and 740i cooling system. The cooler (heat exchanger) is a part of the overall cooling system and uses coolant circulated from the regular cooling system to cool the transmission oil running through this small cooling block. Some of the hoses are shared with the rest of the cooling system as well. The E38/E39 heat exchanger is located along the driver's side frame rail and is accessed from the wheel well. We recommend servicing or cleaning the heat exchanger along with any cooling system overhaul. Or if you're having transmission faults (especially for temperature) you may want to clean the transmission cooler anyway and these hoses will be a nice finishing touch.

Replacing or cleaning the heat exchanger components could lead to better shifting of the automatic as the cooler itself can become clogged. If you're experiencing harder or hesitating shifts, and the internal transmission temperature is rising without being regulated, the components in this system are the likely cause. Staying on top of the cooling needs of the transmission will help prevent a very costly transmission repair in the future. These hoses are easily replaced and you can clean the heat exchanger easily with brake cleaner and some brushes.

Included in this handy package are:

11531711381 - transmission cooling hose from water pump to radiator (with t-connector)

11531711385 - transmission cooling hose from radiator to cooler

11531711384 - transmission cooling hose from cooler to water pump

11537511207 - transmission cooling hose from cooler to chassis

hose clamp

o-ring

This hose set fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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Water Pump & Thermostat Replacement Kit - E39 540i, E38 740i/iL M62 ...

T#:30463918

Part#: 11510393340KT3

Ships in 2 Business Days

$ 266.99 USD

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$ 266.99 USD

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Maintain your BMW's cooling system and avoid costly repairs with our all-inclusive Water Pump and Thermostat Replacement Kit, expertly crafted by enthusiasts at Turner Motorsport. Designed specifically for your BMW model, this kit ensures proper engine operation at optimal temperatures, preventing overheating and extending engine life.

Key Benefits:

Comprehensive Kit: Simplify your cooling system overhaul with all necessary components in one package. High-Quality Parts: Each component meets or exceeds OEM standards, ensuring reliable performance and longevity. Optimal Cooling Performance: Regular water pump and thermostat replacement every 60,000 miles maintains peak cooling efficiency. Enhanced Reliability: Premium components like the Wahler Thermostat and Graf Water Pump ensure durable, long-lasting performance. Why Choose This Kit:

Maximize Cooling System Performance: Replacing your water pump and thermostat simultaneously ensures your BMW’s cooling system operates efficiently. Protect Your Engine: Properly flushing and refilling your cooling system with Genuine BMW coolant guarantees optimal freeze protection and corrosion resistance. Convenient and Cost-Effective: Combining all essential parts in one kit simplifies maintenance and ensures a thorough, lasting repair. Planning a cooling system overhaul? Opt for this comprehensive thermostat and water pump replacement kit for a lasting repair.

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Valley Pan Service Kit - Level 2

T#:15777315

Part#: 11141742042-KT

Ships on Sep 16, 2026

$ 464.99

This product was last offered at the strikethrough price on
04-06-2026

$ 458.99 USD

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$ 458.99 USD

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Valley pan gaskets are a common failure on the M62 motors, Symptoms can include a smell of coolant regularly or a mysterious loss of coolant with no identifiable leaks. This kit contains the basics need to be replaced when doing a valley pan gasket. The included Geba water pump has a metal impeller to replace the failure prone plastic OEM impeller. It is always a good idea to replace the accessory belts when ever they need to be removed to ensure proper tension and belt integrity. Kit includes Valley pan with rubber gasket: updated valley pan alleviates the core of the issue - the design! Valley pan securing hardware Valley pan heat shield Water pipe o-rings Water cross over gaskets Throttle body gasket Geba water pump with gasket Intake gaskets Accessory belt A/C belt

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Meyle Water Pump - M62

We Price Match - Give Us A Call or Chat!

T#:579328

Part#: 11510393336

Ships on Dec 24, 2026

$ 106.99 USD

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$ 106.99 USD

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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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Meyle Radiator Fan Clutch - E31, E32, E34, E38, E39

We Price Match - Give Us A Call or Chat!

T#:591319

Part#: 11527502804

Ships on Dec 24, 2026

$ 101.99 USD

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$ 101.99 USD

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OEM replacement

Meyle Expansion Tank Cap

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T#:579357

Part#: 3148009004

In Stock

Sale - Save 40% $ 14.99

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

$ 8.99 USD

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Qty

Sale - Save 40%

$ 14.99

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

$ 8.99 USD

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Replace worn or missing pieces.

Water Temperature Sensor

T#:596874

Part#: 12621288158

Ships in 1-2 days

$ 44.99 USD

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$ 44.99 USD

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M14x1.5 Thread. Your vehicle is equipped with numerous gauges to allow you to have a better idea of what is going on under the hood. By monitoring these gauges, you can prevent premature engine damage due to low oil pressure or high coolant temperatures. If one isn't functional though, you are in the dark as far as that system goes. One of the most vital is coolant temperature. Replace the sensor to get your gauge working properly again.

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Hella Coolant Temperature Sender - E31, E32, E34, E36, E38

Located in the water accumulator Located in the cylinder head

T#:580139

Part#: 9107471

Ships in 3 Business Days

$ 15.99 USD

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$ 15.99 USD

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2 pin

Auxillary Fan Switch

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T#:4934936

Part#: 3148210000

Special Order: No Guaranteed ETA

$ 18.99 USD

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$ 18.99 USD

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The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary. Also known as the coolant temperature sending unit, comes with related o-ring

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Coolant Temperature Sensor

Located on water pump housing

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T#:594615

Part#: 13621703993

Special Order: No Guaranteed ETA

$ 18.99 USD

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$ 18.99 USD

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This is the coolant temperature sensor used in many BMW models from the mid-1990s to the mid-2000s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer.

This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement.

This coolant temp sensor fits the following BMWs:
1996-1999 E36 BMW 323is 323ic 328i 328is 328ic M3, located in cylinder head
1999-2003 E39 BMW 540i, located on side of water pump
1999-2001 E38 BMW 740i 740il, located on side of water pump
1995-1996 E38 BMW 750il, located on side of water pump
1990-1999 E31 BMW 850i 850ci, located on side of water pump
2000-2006 E53 BMW X5 3.0i, located in cylinder head
2000-2006 E53 BMW X5 4.4i/4.6is/4.8is, located on side of water pump
1997-2002 Z3 BMW Z3 2.5i Z3 3.0i, located in cylinder head

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Coolant Level Sensor

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T#:594511

Part#: 61318360876

Special Order: No Guaranteed ETA

$ 27.99 USD

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$ 27.99 USD

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Monitors the coolant level in the expansion tank. This sensor is critical in keeping tabs of your cooling systems health.

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