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BMW Cooling System Parts & Accessories for BMW 3 Series E36 (1992-1998)

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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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Radiator Hose - Lower

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T#:39295543

Part#: 11531726344

Ships on Aug 10, 2026

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

$ 17.94 USD

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Sale - Save 22%

$ 22.99

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

$ 17.94 USD

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Coolant Temperature Sensor

Located on the cylinder head

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T#:594615

Part#: 13621703993

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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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Meyle Heater Hose - E36

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T#:374249

Part#: 64211394293

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$ 12.99 USD

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$ 12.99 USD

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Engine inlet to heater control valve

Radiator Hose - Lower

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T#:594535

Part#: 11531721711

Special Order: No Guaranteed ETA

$ 9.17 USD

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$ 9.17 USD

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Over the years and with exposure to extremely hot coolant, the coolant hoses in your vehicle can take a beating. Being made of reinforced rubber, these hoses can fail in a number of ways. Splitting at a hose clamp, swelling, cracking, and breaking are just a few of the ways this hose can leave you stranded. Replace it at the first sign of wear to keep your coolant in your engine.

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Water Pump O-Ring

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T#:592886

Part#: 11511714519

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$ 9.17 USD

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Coolant Hose

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T#:373146

Part#: 13541735174

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$ 8.99 USD

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Thermostat to throttle body

Lower Radiator Mount - Priced Each

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T#:361005

Part#: 17111178412

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$ 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

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

Located in the cylinder head

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T#:382428

Part#: 12621747281

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$ 20.99 USD

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2 pin

Coolant Hose

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T#:373145

Part#: 13541735173

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$ 13.99 USD

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Cylinder head to thermostat

Coolant Expansion Tank With Cap - 17111712835

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T#:46616014

Part#: EPK0012

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$ 29.99 USD

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The coolant expansion tank provides a place for excess fluid as coolant expands and contracts with temperature changes. Constant exposure to these extremes can cause the tank to crack, break, or suffer damage to its nipples or mounting points. To keep your cooling system sealed and functioning properly, any damaged tank should be replaced.

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URO Expansion Tank Cap - BMW E30

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T#:592118

Part#: 17111468077

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$ 6.99 USD

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$ 6.99 USD

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URO Expansion Tank Cap - BMW E30

The URO Expansion Tank Cap - BMW E30 is a crucial component for maintaining optimal cooling system performance by ensuring proper pressure regulation. Over time, older radiator caps lose their ability to hold pressure, leading to a lower boiling point and potential overheating issues. This high-quality replacement cap is designed to restore factory pressure levels, preventing coolant loss and maintaining engine efficiency. Crafted from durable materials, it resists wear and temperature fluctuations, ensuring long-lasting reliability.

Direct replacement for BMW E30 models
Maintains correct cooling system pressure to prevent overheating
Helps sustain optimal engine temperature and performance
High-quality construction for durability and reliability
Prevents coolant evaporation and system inefficiencies
Easy installation with OE-style fitment

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1988-1999 BMW 3-Series/1995-1999 BMW M3 , Automatic Replacement Radia...

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T#:597382

Part#: R1841-AT

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$ 143.99 USD

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$ 143.99 USD

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This 1988-1998 BMW 3 Series radiator is a direct OEM replacement for your old stock unit. There is no need to bend, cut, or modify anything to ensure proper fitment in your vehicle. This radiator features OEM spec plastic end tanks attached to an aluminum core for stock cooling efficiency. At some point the inevitable happens to original stock radiators. They either spring a leak, get clogged up, or a plastic inlet or outlet cracks due to years of constant clamp pressure. This 1988-1999 BMW 3Series radiator is a perfect replacement to keep your cooling system in top-notch shape, and just like all Mishimoto parts, it comes with the Mishimoto Lifetime Warranty. WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.

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