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BMW Cooling System Parts & Accessories for BMW 5 Series E34 (1987-1995)

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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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Aluminum Thermostat Housing - E34, E36, Z3

T#:579865

Part#: 54402

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05-03-2026

$ 20.39 USD

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The plastic thermostat cover in your BMW is a known point of failure. Throughout the years of repeated contact with hot coolant, the plastic can crack and cause massive coolant leaks and potential overheating.

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Genuine BMW Upper Radiator Hose - 11531312241 - E34 M5

T#:35828

Part#: 11531312241

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

$ 43.99 USD

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06-15-2026

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This is the water hose that goes to the upper left opening on the radiator on US spec BMW E34 M5 with the 3.6 liter engine.

This item fits the following BMWs:
1991-1993 E34 BMW M5

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Genuine BMW Radiator Hose - Upper - E34 525i M50 2.5L

T#:367687

Part#: 11531720678

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$ 32.57 USD

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This product was last offered at the strikethrough price on
06-25-2026

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Genuine BMW Coolant hose - E34 535i

T#:367918

Part#: 17121712736

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$ 72.94 USD

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This product was last offered at the strikethrough price on
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Water Pump - M50/M52 With Composite Impeller (Original BMW)

T#:623

Part#: 11517527799

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Sale - Save 5% $ 237.99

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

$ 225.42 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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Auxilary Water Pump for Heating System - E34 E32

T#:338205

Part#: 64118390063

Ships in 3 Business Days

Starting at $ 304.99 USD

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Starting at $ 304.99 USD

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The auxiliary water pump helps to move coolant through the heating system. Sometime the unit can develop leaks or the pump itself may fail.

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 item fits the following BMWs:
3/1990-1995 E34 BMW 525i 530i 535i 540i M5
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi

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Coolant Level Sensor

T#:30728984

Part#: 61311378320

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

$ 15.29 USD

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Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

T#:640140

Part#: 17111712788

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Sale - Save 39% $ 3.99

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05-03-2026

$ 2.44 USD

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$ 3.99

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$ 2.44 USD

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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.

Bremmen Engine Fan Blade - 11 Blades, 420mm - BMW M30 S38 M50 M52 S5...

T#:640149

Part#: 11521712058

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Sale - Save 22% $ 23.99

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

$ 18.76 USD

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Sale - Save 22%

$ 23.99

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$ 18.76 USD

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This fan is driven by the serpentine belt, engaged by the fan clutch. If you have bad motor mounts, it's quite common for the blades of this fan to make contact with the radiator or radiator shroud, essentially self-destructing the fan into many pieces. Be sure to get a new fan clutch, while you are replacing this.

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