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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Performance Water Pump & Thermostat Kit - BMW M50 M52
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Packaged by Turner - Corporate Logo
T#:30397440
Part#: 11517527799KT2
In Stock
$ 357.99

This product was last offered at the strikethrough price on
06-15-2026

$ 342.99 USD
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$ 342.99 USD
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BMW vehicles are known for their robust performance, but the water pump is a notorious weak spot, often needing replacement every 60,000 miles.

During this service, it's wise to also swap out the thermostat to maintain the efficiency of your vehicle's cooling system. Turner Motorsport simplifies this process with our expertly curated Water Pump & Thermostat Replacement Kit.

This premium kit centers around the renowned EMP Stewart high-performance water pump--a favorite among BMW enthusiasts for its exceptional design. Featuring a stainless steel impeller, this pump enhances coolant flow by 20%. Complementing this is a low-temperature 68°C (154.4°F) Mishimoto thermostat, an upgraded aluminum thermostat housing, and Redline Water Wetter coolant additive. Together, these components make for the ultimate cooling system upgrade for your E36, E39, or Z3!

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Basic Cooling System Service Kit - E34 525i M50 2.5L
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Packaged by Turner - Corporate Logo
T#:557231
Part#: E34525BCKT
Ships in 10 Business Days
Sale - Save 10% $ 264.99

This product was last offered at the strikethrough price on
02-27-2026

$ 238.54 USD
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Sale - Save 10%
$ 264.99

This product was last offered at the strikethrough price on
02-27-2026

$ 238.54 USD
Free Shipping

Just like the rest of your vehicle's major systems, the cooling system must also be addressed periodically to ensure proper cooling and component reliability. Plastic and rubber components become brittle and prone to splitting or cracking after long periods of heating and cooling cycles, especially in colder climates! The coolant itself can degrade or become contaminated, leading to potential corrosion or freezing issues. Finally, thermostats and sensors can fail completely, preventing proper cooling and/or coolant temperature readings to become inaccurate.

To make sure you are not left stranded on the side of the road with an overheated engine, we have put together this Basic Cooling System Service kit. This kit contains all of the most-likely-to-fail components, giving you peace of mind knowing your engine will continue to run cool for another 60,000+ miles.

See kit contents below for all included components.

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Thermostat Replacement Kit - E28, E30, E34 M20B25/27
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Packaged by Turner - Corporate Logo
T#:41289770
Part#: 11531730470TKT
Back Ordered
Sale - Save 14% $ 93.99

This product was last offered at the strikethrough price on
06-08-2026

$ 81.18 USD
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Sale - Save 14%
$ 93.99

This product was last offered at the strikethrough price on
06-08-2026

$ 81.18 USD
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This BMW Thermostat Replacement Kit is the go-to choice for preserving the performance and reliability of your classic M20-powered BMW—keeping your engine running cool and smooth mile after mile.
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Water Pump - E34 530i 540i E32 740i/il
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Packaged by Turner - Corporate Logo
T#:338251
Part#: 11510007042X
Ships in 7 Business Days
Starting at $ 470.99 USD
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Starting at $ 470.99 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 waterpump will go a long way for keeping your car on the road and operating properly.

This item fits the following BMWs:
1992-1995 E34 BMW 530i 540i
1992-1994 E32 BMW 740i 740ill
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Meyle Radiator Fan Clutch - E12, E24, E28, E30, E34, E36, Z3 ...
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Meyle - Corporate Logo
T#:384584
Part#: 11521723918
In Stock
$ 108.99

This product was last offered at the strikethrough price on
06-22-2026

$ 89.99 USD
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$ 89.99 USD
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Quality aftermarket replacement
Fan Blade
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Meyle - Corporate Logo
T#:594536
Part#: 11521723363
Ships on Nov 16, 2026
$ 32.99 USD
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This fan is driven by the 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 peices. Be sure to get a new fan clutch, while you are replacing this.
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Meyle Radiator Fan Clutch - E31, E32, E34, E38, E39
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Meyle - Corporate Logo
T#:591319
Part#: 11527502804
Ships on Nov 16, 2026
$ 101.99 USD
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OEM replacement
Water Pump
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Meyle - Corporate Logo
T#:582577
Part#: 11519070761
Ships on Nov 16, 2026
$ 55.99 USD
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Meyle Expansion Tank Cap
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Meyle - Corporate Logo
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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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.

Coolant Thermostat - Includes Sealing Gasket
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Meyle - Corporate Logo
T#:54852031
Part#: 028 280 0004
Ships on Oct 30, 2026
New Item
$ 11.99 USD
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This Meyle-Original replacement thermostat is a direct-fit solution designed to maintain a rock-solid, factory-correct 80°C operating temperature.
Meyle Expansion Tank Cap
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Meyle - Corporate Logo
T#:5958735
Part#: 17111742232
Special Order: No Guaranteed ETA
$ 10.99 USD
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Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. The coolant expansion tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap. Often times, the coolant is not kept under enough pressure to keep it from boiling or expanding too much. This cap keeps all the heat and liquid inside the coolant system for maximum efficiency. Should be replaced each time major coolant system service is performed.
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