URO BMW Cooling System Parts & Accessories for BMW 3 Series E30 (1984-1991)

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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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URO Coolant Expansion Tank - E30 325e 325i 88-91
For vehicles with production date from 09/1987
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T#:2453609
Part#: 17111712641
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$ 46.99 USD
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$ 46.99 USD
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This coolant reservoir is for the E30 325i 1988-1991. We have found that the expansion tanks should be replaced based on age as well as condition. This item fits the following BMWs: 1988-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
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Radiator Fan Switch
For vehicles with production date from 09/1987
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T#:361996
Part#: 61311378073
In Stock
$ 26.44 USD
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$ 26.44 USD
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Measures radiator air temperature enabling the fan to turn off or on
Heater Hose
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T#:363331
Part#: 64218367790
In Stock
$ 34.99 USD
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Used to connect to the inline thermostat

Thermostat Housing
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T#:392721
Part#: 11531730470
In Stock
$ 39.99 USD
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This is a quality aftermarket replacement aluminum thermostat housing for cars with the M20 6 cylinder engine - 325e, 325i, 528e, 525i. This is the side of the housing that mounts to the cylinder head and has openings for the various coolant / engine temperature sensors. There are 4 ports for sensors so check your existing housing for the sensor layout.

If you're looking for a Genuine BMW factory replacement part, Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.
 

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BMW E30 Coolant Hose - Return Line
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T#:362004
Part#: 11531722743
In Stock
$ 42.39 USD
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Attaches the thermostat to the bottom of radiator
Thermostat Housing Cover
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T#:367144
Part#: 11531265059
In Stock
$ 25.99 USD
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Replace your old or cracked thermostat cover

Fan Clutch
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T#:373086
Part#: 11521723027
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$ 74.00 USD
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Direct replacement from URO
Water Pump - W/ Gasket
For vehicles with production date up to 09/1987
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T#:372935
Part#: 11519071562
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$ 51.99 USD
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$ 51.99 USD
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The water pump in your vehicle keeps all that coolant flowing freely. If it begins to fail, overheating problems are inevitable. Don't take a chance on doing damage to engine internals by not replacing your water pump.
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URO Fan Blade - E12, E23, E24, E28, E30
Fits from 09/79 production date
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T#:12996
Part#: 11521271846
In Stock at Vendor
$ 35.99

This product was last offered at the strikethrough price on
03-02-2026

$ 33.99 USD
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$ 33.99 USD
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The blades on your radiator cooling fan can get brittle and crack over the years. If cracked, the high speed rotation can cause the fan to spin apart. Don't take a chance on having your fan explode under your hood. Replace it now and keep your cooling proper and your radiator safe.
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Water Pump
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T#:372930
Part#: 11511734602
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$ 49.99 USD
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Includes O-ring and metal impeller
Coolant Expansion Tank Hose - E30 325e 325i 325is 325ix thru 1987 ...
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T#:6920
Part#: 11531289257
In Stock
$ 10.99

This product was last offered at the strikethrough price on
04-20-2026

$ 6.76 USD
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$ 6.76 USD
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This hose goes from the expansion tank to the water pump. Replace any hoses that show signs of wear and deterioration before it's too late.​ This item fits the following BMWs: 1984-1987 E30 BMW 325e 325es 325i 325ic 325is 325ix
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URO Upper Radiator Hose - E30 325e 325i 1988-1991
For vehicles with production date from 09/1987
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T#:361993
Part#: 11531722218
In Stock
$ 12.89 USD
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$ 12.89 USD
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Hose from radiator to water pump


Radiator Hose - Lower
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T#:361989
Part#: 11531279895
In Stock
$ 14.99

This product was last offered at the strikethrough price on
03-06-2026

$ 12.99 USD
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$ 12.99 USD
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During your radiator hose change, fluid loss is inevitable. Be sure to browse the website to get the proper replacement for your vehicle sent directly to your door. Also, be sure to order a new thermostat housing, as the stock plastic units often get broken or warped during removal
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Coolant Hose to Throttle Housing Upper Nipple - E30 325e/i 88-91 E34 ...
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T#:19433
Part#: 13541719967
In Stock
$ 11.99 USD
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This is the hose that provides coolant to heat the throttle housing on M20 engines. It is connected to the upper nipple.

With more than 4,000 European vehicle replacement parts, URO is no stranger to the market. Superior metal stock and extremely strict quality control are at the forefront of URO’s agenda and it shows as they become the OE supplier for more and more car companies every single day.​

This item fits the following BMWs:
1988-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
1989-1990 E34 BMW 525i
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Radiator Hose - Upper
For vehicles with production date up to 09/1987
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T#:361990
Part#: 11531286914
In Stock
$ 15.99

This product was last offered at the strikethrough price on
04-28-2026

$ 12.99 USD
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$ 12.99 USD
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Hose from radiator to water pump URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts.
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Water Hose Outlet
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T#:363556
Part#: 64218367791
In Stock
$ 8.99

This product was last offered at the strikethrough price on
03-25-2026

$ 6.99 USD
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$ 6.99 USD
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Used to connect to the inline thermostat

Coolant Hose to Throttle Housing Lower Nipple - E30 325e/i 88-91 E34 ...
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T#:7242
Part#: 13541719966
In Stock
$ 7.99

This product was last offered at the strikethrough price on
03-31-2026

$ 7.68 USD
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$ 7.68 USD
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This is the hose that provides coolant to heat the throttle housing on M20 engines. It is connects to the lower nipple.

This item fits the following BMWs:
1988-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
1988 E28 BMW 528e
1989-1990 E34 BMW 525i
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Coolant Hose
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T#:362013
Part#: 11531718982
In Stock
$ 5.99 USD
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Connects between the Water pump and the thermostat

Heater Hose
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T#:362003
Part#: 11531289377
In Stock
$ 13.58

This product was last offered at the strikethrough price on
04-06-2026

$ 6.50 USD
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$ 6.50 USD
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Connects to the thermostat housing outlet.
Coolant Hose
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T#:362014
Part#: 13541289976
In Stock
$ 5.24 USD
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Connects to the thermostat housing

Water Hose
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T#:373139
Part#: 11531266472
In Stock
$ 1.99 USD
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Return pipe to water pump

Fuel Water Hose 13541705568
Up to production date 09/1987
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T#:7238
Part#: 13541705568
In Stock
$ 5.99 USD
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$ 5.99 USD
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FUEL SYSTEM WATER HOSE 13541705568.--

This item fits the following BMWs:
BMW 3 Series - 325e, 325es, 325i, 325ix
BMW 5 Series - 528e

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URO Lower Radiator Hose - E30 325e 325i 1988-1991
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T#:373016
Part#: 11531718980
Back Ordered
$ 8.03 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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Expansion Tank Hose
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T#:50066848
Part#: 17121712736
In Stock
New Item
$ 12.79 USD
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Coolant overflow hose designed to route excess coolant to and from the expansion tank, helping regulate system pressure and maintain proper coolant levels. Manufactured for correct fit and flow, it ensures reliable expansion tank operation and leak-free performance.
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Coolant Temperature Sensor
For vehicles with production date up top 09/1985
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T#:372927
Part#: 62110788115
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$ 5.99 USD
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$ 5.99 USD
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This coolant sensor is located in the coolant system, monitor the temperature for both the gauge and ECU.
Coolant Hose
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T#:362012
Part#: 11531287651
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$ 11.99 USD
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From water pump to thermostat housing
Rubber Grommet
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T#:591950
Part#: 17111117442
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$ 11.99 USD
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For mounting of radiator and oil cooler

Expansion Tank Cap
For vehicles with production date up to 09/1987
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T#:362007
Part#: 17114379047
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$ 7.99 USD
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$ 7.99 USD
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1.2 Bar pressure

URO Rubber Mount - Radiator - E30 E32 E34 E36 Z3
Lower For vehicles with production date from 09/1987 ¦ Lower
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T#:591951
Part#: 17111178412
Ships in 2 Business Days
$ 3.12 USD
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$ 3.12 USD
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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts.
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URO Coolant Expansion Tank - BMW E30 E36 Z3 M42 M44, E34 325 ...
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T#:362008
Part#: 17111712835
Ships in 2 Business Days
$ 18.99 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
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URO Water Pump - BMW M20 M50
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T#:639174
Part#: 11519070759
Ships in 2 Business Days
$ 52.99 USD
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The water pump in your vehicle keeps all that coolant flowing freely. If it begins to fail, overheating problems are inevitable. Don't take a chance on doing damage to engine internals by not replacing your water pump.
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URO Coolant Level Sensor - BMW E24 E30
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T#:37757292
Part#: 61311361248
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$ 12.99 USD
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URO Coolant Level Sensor - BMW E24 E30

URO Coolant Level Sensor - BMW E24 E30 is the perfect solution for restoring accurate coolant level monitoring in your BMW. If you are experiencing a false "low coolant" warning or if your vehicle fails to notify you of dangerously low coolant levels, this high-quality replacement sensor will fix those issues. Designed as a direct-fit OE replacement, this sensor installs easily into your coolant reservoir tank with a simple plug-and-play wiring connection. Made from durable polymer and corrosion-resistant metal materials, this sensor is built to withstand the intense heat of your vehicle’s cooling system. Alloy conductors help minimize electrical resistance for accurate operation and long-lasting reliability.

  • Resolves false "low coolant" indicator light warnings
  • Prevents failure to alert the driver of dangerously low coolant levels
  • Direct-fit OE replacement design for easy installation into the coolant reservoir tank
  • Simple plug-and-play wiring connection for quick installation
  • Manufactured from high-quality polymer and corrosion-resistant metal materials to endure high cooling system temperatures
  • Alloy conductors reduce electrical resistance for precise operation
  • Designed and tested for long-lasting reliability
  • 24 Month Unlimited Mileage Warranty for peace of mind
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URO Expansion Tank Cap - BMW E30
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T#:592118
Part#: 17111468077
Back Ordered
$ 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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