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BMW Cooling System Parts & Accessories for BMW 8 Series E31 (1991-1997)

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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 Thermostat Housing - M60

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T#:367686

Part#: 11531720173

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3% off MSRP $ 29.99

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$ 28.99 USD

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$ 29.99

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$ 28.99 USD

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Auxiliary Fan Assembly

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T#:556566

Part#: 661230

Ships in 1-2 days

$ 166.99

This product was last offered at the strikethrough price on
05-07-2026

$ 161.99 USD

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$ 161.99 USD

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

Located in the water accumulator

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T#:580139

Part#: 9107471

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$ 15.99 USD

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$ 15.99 USD

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2 pin

O-RING

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T#:580584

Part#: C32348

In Stock

$ 3.99

This product was last offered at the strikethrough price on
05-07-2026

$ 2.99 USD

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$ 2.99 USD

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Radiator Bracket - Front - E31

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T#:45753

Part#: 17111723256

Ships in 9 Business Days

$ 14.99 USD

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$ 14.99 USD

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Genuine BMW BRACKET F.RADIATOR
Fits BMW Engines including:
M60,M62,M70,M73,S70

Genuine BMW Pipe - 11531733350

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T#:35921

Part#: 11531733350

Ships in 8 Business Days

3% off MSRP $ 382.99

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$ 370.99 USD

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3% off MSRP

$ 382.99

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$ 370.99 USD

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Your coolant system plays a vital role in keeping your engine running at optimal temps and if any component fails or is wearing, it could lead to catastrophic failure! Keep your coolant system in prime shape and replace wearing components!

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Expansion Tank - E31

Ate

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T#:63355

Part#: 34331160304

Ships in 9 Business Days

3% off MSRP $ 211.99

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$ 204.99 USD

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$ 211.99

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$ 204.99 USD

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Genuine BMW Expansion Tank - Ate

Victor Reinz Water Pump Gasket - E31, E32, E34, E38, E39, E53 ...

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T#:376106

Part#: 11511731372

Ships in 6 Business Days

$ 7.99

This product was last offered at the strikethrough price on
07-06-2026

$ 7.13 USD

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$ 7.13 USD

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Should be replaced each time the water pump is removed

Cooling Fan Assembly

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T#:31291056

Part#: 64541392913

Ships on Jul 24, 2026

$ 161.99 USD

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$ 161.99 USD

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Anti-Freeze Tester

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T#:641679

Part#: CTAA195

Ships on Jul 27, 2026

$ 9.98 USD

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$ 9.98 USD

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Tests all ethylene glycol solutions with radiator hot or cold

FAE Water Temperature Sensor - E31, E32, E34, E38

Located in the water accumilator

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T#:7171

Part#: 12621288158

Ships on Jul 31, 2026

$ 16.99 USD

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$ 16.99 USD

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ENGINE ELECTRICAL TEMPERATURE SENSOR, WATER 12621288158

BMW Radiator Expansion Tank Pressure Fitting

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Requires the use of a Motive Power Bleeder, sold separately

T#:380462

Part#: 1175

Ships on Jul 31, 2026

$ 24.99 USD

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$ 24.99 USD

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Allows you to check for leaks in the coolant system

Elring Thermostat Gasket - BMW M60 M62 M70 S70

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T#:45005599

Part#: 818.437

Special Order: No Guaranteed ETA

$ 2.99 USD

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$ 2.99 USD

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This rubber gasket seals the junction between the thermostat and water pump Measurements: 4.0x76.5mm

2 Pin Connector

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T#:33412932

Part#: 61132359999

Ships on Jul 28, 2026

Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD

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Sale - Save 25%

$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 8.24 USD

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Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Febi Expansion Tank Hose - E31, E38, E39

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T#:6969

Part#: 11531741404

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$ 22.99 USD

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$ 22.99 USD

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ENGINE WATER HOSE 11531741404

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

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T#:341629

Part#: 11527502804

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$ 109.99 USD

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$ 109.99 USD

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Quality aftermarket replacement

Febi Coolant Expansion Tank - E31, E38, E39

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T#:381841

Part#: 17111741167

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$ 90.99 USD

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$ 90.99 USD

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Replace your cracked or faded expansion tank.

Coolant Temperature Sensor

Located on water pump housing

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T#:594615

Part#: 13621703993

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$ 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

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$ 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.

BMW Coolant Expansion Tank With Cap

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T#:46616009

Part#: EPK0013

Ships in 4 Business Days

$ 64.99 USD

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$ 64.99 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it. This replacement will fit perfectly and provide the same heating and cooling characteristics as an original unit. When replacing, be sure to have some extra coolant. Check ECS Tuning's website for a wide variety of coolants specifically designed for your car. Most German vehicles require specialized coolant. Be sure to pick up the proper coolant when refilling to avoid damage or premature corrosion.

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

Located in the water accumulator

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T#:382428

Part#: 12621747281

Special Order: No Guaranteed ETA

$ 20.99 USD

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$ 20.99 USD

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2 pin

Lower Radiator Mount - Priced Each

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T#:361005

Part#: 17111178412

Back Ordered

$ 2.03 USD

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$ 2.03 USD

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This is the small lower rubber mount that goes on the bottom of the radiator. These mounts sit down into mount 17111723337. Fits left or right side - priced each

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