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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Elring Thermostat Gasket - BMW M60 M62 M70 S70
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Elring - Corporate Logo
T#:45005599
Part#: 818.437
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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
Bremmen Engine Fan Blade - 11 Blades, 420mm - BMW M30 S38 M50 M52 S5...
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Bremmen Parts - Corporate Logo
T#:640149
Part#: 11521712058
In Stock
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

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

$ 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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2 Pin Connector
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ECS - Corporate Logo
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
Free Shipping on orders $49 and up

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

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.
Coolant Expansion Tank With Cap - 17111712835
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Rein - Corporate Logo
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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Febi Coolant Temperature Sender - E31, E32, E34, E36, E38
For vehicles with production date from 09/1992
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Febi - Corporate Logo
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
Radiator Hose - Upper
For vehicles with production date from 03/1995
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URO - Corporate Logo
T#:373024
Part#: 11531741405
Ships in 1 Business Day
$ 8.99 USD
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$ 8.99 USD
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Hose from radiator to water pump

Rein Heater Hose - E32, E34
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Rein - Corporate Logo
T#:20514
Part#: 64211390935
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$ 12.99 USD
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HOSE F WATER VALVE AND LEFT 64211390935 Manufactured by CRP


Behr Radiator - E34
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Behr - Corporate Logo
T#:1195792
Part#: 17111723467
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$ 273.99

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

$ 265.99 USD
$ 265.99 USD
OE replacement radiator
OEM Behr Radiator - E34 525i M20 & M50
For Vehicles with production date from 09/1992
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Genuine BMW - Corporate Logo
T#:391244
Part#: 17111737763
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6% off MSRP $ 834.99

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

$ 786.99 USD
6% off MSRP
$ 834.99

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

$ 786.99 USD
OEM Behr Radiator - 520mmA common failure item on the 1989-1995 E34 525i is the radiator. It is such a common failure item we recommend replacing this item preventatively every 80,000 miles. This Radiator is made by Behr, a high quality OE manufacturer.

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:
1989-1990  E34 BMW  525i - Manual Transmission
1993-1995  E34 BMW  525i - Automatic Transmission
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Victor Reinz Coolant Pipe Gasket
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Victor Reinz - Corporate Logo
T#:19371
Part#: 11121726721
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$ 3.05 USD
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GASKET ASBESTOS FREE 11121726721 Manufactured by Reinz



Gates Radiator Hose - Upper - E34
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Gates - Corporate Logo
T#:591777
Part#: 11531720678
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$ 18.99 USD
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Hose from radiator to water pump
Gates Coolant Hose - E34
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Gates - Corporate Logo
T#:592903
Part#: 11531287651
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$ 20.99 USD
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From water pump to thermostat housing
Lower Radiator Mount - Priced Each
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MTC - Corporate Logo
T#:361005
Part#: 17111178412
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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

Gates Coolant Hose - Molded - E30, E34
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Gates - Corporate Logo
T#:592918
Part#: 11531718982
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$ 20.99 USD
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Connects between the Water pump and the thermostat

Rein Thermostat 80C - E30 325e, E28 535i, E24 633CSi
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Rein - Corporate Logo
T#:34114243
Part#: 11531710953
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$ 19.99 USD
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Thermostat 80C is a crucial component for controlling the temperature in BMW engines, ensuring optimal performance and protection. Designed to open at 80°C, this thermostat helps your engine reach its ideal operating temperature quickly while preventing overheating. Engineered specifically for BMW vehicles, the Thermostat 80C ensures precise temperature regulation, enhancing both engine efficiency and longevity. Available at Turner Motorsport, this direct-fit replacement offers easy installation and reliable performance.

  • Designed for BMW engines for a perfect fit
  • Opens at 80°C to regulate coolant flow and maintain optimal temperature
  • Prevents overheating and improves engine efficiency
  • Manufactured from high-quality, durable materials for long-lasting use
  • Direct-fit replacement ensures hassle-free installation
  • Enhances overall engine performance and longevity

The Thermostat 80C from Turner Motorsport is the perfect choice for BMW owners looking to maintain optimal engine temperature, ensuring smooth operation and extending the life of their vehicle.

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URO Expansion Tank Cap - BMW E30
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URO - Corporate Logo
T#:592118
Part#: 17111468077
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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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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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