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

Clear BMW chassis

Please ensure your correct model is selected

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.

Sub-Categories

Sort By:

Genuine BMW - Corporate Logo
T#:7432
Part#: 17111712788
In Stock
$ 5.94 USD
Free Shipping on orders $49 and up

This is the Genuine BMW Coolant bleeder screw. We recommend a heavy duty Aluminum replacement from ECS Tuning if you do not want to replace this part again when it fails.


Genuine BMW Vent Screw
This item fits the following BMW Chassis:
E36 M3,E46 M3,E85 Z4M,E53 48IS,E30,E34,E36,E38,E39,E46,E53 X5 X5,E83 X3,E85 Z4,E86 Z4,E90
 

 

Show More Show Less
Genuine BMW - Corporate Logo
T#:407610
Part#: 11531740437
In Stock
12% off MSRP $ 13.55

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

$ 11.90 USD
Free Shipping on orders $49 and up
12% off MSRP
$ 13.55

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

$ 11.90 USD
Free Shipping on orders $49 and up
Needs to be replaced once removed

Water Pump
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:361969
Part#: 11510007042
Ships in 1 Business Day
$ 88.99 USD
Free Shipping
$ 88.99 USD
Free Shipping
With housing, gaskets and metal impeller

Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:362013
Part#: 11531718982
In Stock
$ 5.99 USD
Free Shipping on orders $49 and up
Connects between the Water pump and the thermostat
MTC - Corporate Logo
T#:7464
Part#: 17201719414
In Stock
$ 3.05

This product was last offered at the strikethrough price on
05-11-2026

$ 2.49 USD
Free Shipping on orders $49 and up
$ 2.49 USD
Free Shipping on orders $49 and up

BMW RADIATOR RUBBER MOUNTING 17201719414

Mission Trading Company is a worldwide leader in the manufacturing of European, Japanese and domestic auto parts. With factories around the world producing parts to the most stringent of standards, MTC is there with the parts for your next project.

Show More Show Less

Coolant Level Sensor
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:30728984
Part#: 61311378320
In Stock
Sale - Save 56% $ 34.99

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

$ 15.29 USD
Free Shipping on orders $49 and up
Sale - Save 56%
$ 34.99

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

$ 15.29 USD
Free Shipping on orders $49 and up
Genuine BMW - Corporate Logo
T#:11526
Part#: 82142209769
In Stock
$ 10.60

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

$ 10.57 USD
Free Shipping on orders $49 and up
$ 10.57 USD
Free Shipping on orders $49 and up
This 1 liter bottle is perfect for topping of the coolant in your BMW. This is The use of Original BMW Anti-Freeze/Coolant will ensure sufficient cooling in summer and protection against freeze-ups in winter. BMW Antifreeze/Coolant will also guard your vehicle's various engine components against corrosion. BMW Anti-Freeze/ Coolant will prevent excessive silicate gel precipitation, which may cause plugging of the cooling system and lead to more extensive repairs.
Show More Show Less

Rein - Corporate Logo
T#:19431
Part#: 17121712736
In Stock
$ 13.99 USD
Free Shipping on orders $49 and up


VENT HOSE 17121712736 Manufactured by CRP


Rein - Corporate Logo
T#:591144
Part#: 11531265084
In Stock at Vendor
$ 2.99

This product was last offered at the strikethrough price on
10-07-2026

$ 2.05 USD
Free Shipping on orders $49 and up
$ 2.05 USD
Free Shipping on orders $49 and up
This O-ring seals the thermostat to the cylinder head.
URO Water Pump O-Ring (Small) - BMW M60 M62 S62 M70 S70
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:377294
Part#: 11531710055
In Stock
$ 1.01 USD
Free Shipping on orders $49 and up
When it comes time to replace the water pump, be sure to replace all the O-Rings associated with it to ensure that your car stays leak free. If you are experiencing leaking issues, be sure to inspect these rings, as they might have worn down. This specific ring is used when replacing water pump on cooling pipe to the water accumulator. There are two per car.
Show More Show Less
FAE - Corporate Logo
T#:7172
Part#: 12621747281
In Stock
$ 13.99 USD
Free Shipping
$ 13.99 USD
Free Shipping
This is the engine coolant temperature sensor that is mounted into the cylinder head.


Genuine BMW - Corporate Logo
T#:367933
Part#: 17222245358
In Stock
$ 3.99 USD
Free Shipping on orders $49 and up

Upgrade your BMW's oil or transmission cooling system with the Turner Motorsport Genuine O-Ring, part number 17222245358. This high-quality O-ring is designed to provide a reliable seal, ensuring optimal performance and preventing leaks in your BMW's vital systems. Additionally, it is compatible with MINI applications, where it is commonly used on the end of the parking brake cable.

  • Genuine BMW part for guaranteed quality and compatibility
  • Prevents leaks in the oil and transmission cooling systems
  • Ensures optimal performance of vital components
  • Compatible with MINI applications for versatile use
Show More Show Less
Meyle Expansion Tank Cap
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
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
Free Shipping on orders $49 and up
Sale - Save 40%
$ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD
Free Shipping on orders $49 and up
Replace worn or missing pieces.
Rein Water Pump O-Ring (Small) - E32, E34, E38, E39
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379680
Part#: 11531710055
In Stock
$ 2.03 USD
Free Shipping on orders $49 and up
When it comes time to replace the water pump, be sure to replace all the O-Rings associated with it to ensure that your car stays leak free. If you are experiencing leaking issues, be sure to inspect these rings, as they might have worn down. This specific ring is used when replacing water pump on cooling pipe to the water accumulator. There are two per car.
Show More Show Less

Rein Coolant Bleeder Screw CHW1575 - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591955
Part#: 17111712788
In Stock
$ 4.99 USD
Free Shipping on orders $49 and up
Coolant Bleeder Screw is a critical component for maintaining your BMW’s cooling system. Designed to release trapped air from the coolant lines, this screw ensures efficient coolant flow and prevents overheating. Specifically engineered for BMW models, it enhances the overall performance and longevity of your engine by maintaining proper temperature regulation. Comes with O-Ring.
Show More Show Less

URO - Corporate Logo
T#:19433
Part#: 13541719967
Ships in 1 Business Day
$ 11.99 USD
Free Shipping on orders $49 and up
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
Show More Show Less
Rein - Corporate Logo
T#:340541
Part#: 17111742231
Ships on Oct 23, 2026
$ 17.99

This product was last offered at the strikethrough price on
09-29-2026

$ 14.99 USD
Free Shipping on orders $49 and up
$ 14.99 USD
Free Shipping on orders $49 and up
This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.
Show More Show Less

Radiator Mount Support - Upper
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:377277
Part#: 17111712911
In Stock
$ 1.67 USD
Free Shipping on orders $49 and up
Secures the upper radiator bracket to core support.
Genuine BMW - Corporate Logo
T#:45724
Part#: 17111712816
Ships in 1-2 days
$ 8.99 USD
Free Shipping on orders $49 and up


Genuine BMW Screw Plug -
This item fits the following BMW Chassis:
E30,E34,E36

Fits BMW Engines including:
M20,M42,M44,M50


URO - Corporate Logo
T#:7242
Part#: 13541719966
In Stock
$ 7.68 USD
Free Shipping on orders $49 and up
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
Show More Show Less

Genuine BMW - Corporate Logo
T#:6533
Part#: 07129952104
In Stock
$ 3.99 USD
Free Shipping on orders $49 and up
GENUINE BMW HOSE CLAMP 07129952104
Coolant Thermostat - Includes Sealing Gasket
5X Entries Into Our F80 M3 Sweepstakes
Meyle - Corporate Logo
T#:54852031
Part#: 028 280 0004
In Stock
New Item
$ 11.99 USD
Free Shipping on orders $49 and up
This Meyle-Original replacement thermostat is a direct-fit solution designed to maintain a rock-solid, factory-correct 80°C operating temperature.
OEM Rein Coolant Hose - E32 E34
For vehicles with production date from 03/1995
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6970
Part#: 11531741405
Ships in 1 Business Day
$ 14.99 USD
Free Shipping on orders $49 and up
$ 14.99 USD
Free Shipping on orders $49 and up
Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs:
BMW 5 Series - 530i, 530i wagon /540i
BMW 7 Series - 740i, 740iL

--.
Show More Show Less


URO - Corporate Logo
T#:362008
Part#: 17111712835
Ships in 1 Business Day
$ 18.99 USD
Free Shipping on orders $49 and up
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
Show More Show Less
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:362012
Part#: 11531287651
Ships in 1 Business Day
$ 11.99 USD
Free Shipping on orders $49 and up
From water pump to thermostat housing
Coolant Temperature Sender - 2 Pin
For vehicles with production date from 09/1992
Meistersatz - Corporate Logo
T#:379619
Part#: 12621747281
Ships in 3 Business Days
$ 8.99 USD
Free Shipping on orders $49 and up
$ 8.99 USD
Free Shipping on orders $49 and up

Meistersatz Water Temperature Sensor - E31, E32, E34, E38
Located in the water accumilator Located in the thermostat housing. For vehicles with electronic engine-power requlation
Meistersatz - Corporate Logo
T#:379615
Part#: 12621288158
Ships in 3 Business Days
$ 7.99 USD
Free Shipping on orders $49 and up
$ 7.99 USD
Free Shipping on orders $49 and up
M14x1.5 Thread

URO Rubber Mount - Radiator - E30 E32 E34 E36 Z3
Lower
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:591951
Part#: 17111178412
Ships in 1 Business Day
$ 3.12 USD
Free Shipping on orders $49 and up
$ 3.12 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
Nissens Radiator - E31 E32 E34
For vehicles with production date up to 05/94
Nissens - Corporate Logo
T#:596366
Part#: 17112242138
Ships in 1 Business Day
$ 239.99

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

$ 232.99 USD
$ 232.99 USD

Rein Expansion Tank Cap - E30, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592018
Part#: 17137639023
Ships in 3 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up
$ 14.99 USD
Free Shipping on orders $49 and up
1.4 Bar pressure
BMW Water Pump Gasket
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:15213971
Part#: 11511722677
Ships in 1 Business Day
$ 3.99

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

$ 2.99 USD
Free Shipping on orders $49 and up
$ 2.99 USD
Free Shipping on orders $49 and up
When it comes time to replace the water pump, be sure to replace all the associated gaskets and o-rings to ensure a leak free installation. This gasket seals the water pump to the engine block to keep your engine free from coolant loss, preventing overheating issues.
Show More Show Less

Water Temperature Sensor
Located in the water accumilator Located in the thermostat housing. For vehicles with electronic engine-power requlation
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:372926
Part#: 12621288158
Ships in 1 Business Day
$ 6.99 USD
Free Shipping on orders $49 and up
$ 6.99 USD
Free Shipping on orders $49 and up
Replace the sensor to get your gauge working properly again.

URO Coolant Hose - BMW E34 E32
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373028
Part#: 64211390934
Ships in 1 Business Day
$ 6.99 USD
Free Shipping on orders $49 and up
Connects the accumulator to the water valve
Heater Hose
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373063
Part#: 64211384763
Ships in 1 Business Day
$ 8.99

This product was last offered at the strikethrough price on
04-10-2026

$ 6.99 USD
Free Shipping on orders $49 and up
$ 6.99 USD
Free Shipping on orders $49 and up
Water valve to water pump
Mahle-Behr - Corporate Logo
T#:369633
Part#: 17111742232
Ships in 1 Business Day
$ 18.99 USD
Free Shipping on orders $49 and up
$ 18.99 USD
Free Shipping on orders $49 and up
This radiator expansion tank cap fits E30 325e 325es 325i 325is 325ix 325ic with M20 engine from 1988 . It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

This item fits the following BMWs:
1988-1991  E30 BMW  325e 325es 325i 325ic 325is 325ix
1989-1990  E34 BMW  525i with M20 engine
Show More Show Less


URO Premium - Corporate Logo
T#:2369
Part#: 11531720173
Ships in 1 Business Day
$ 11.00 USD
Free Shipping on orders $49 and up

This aluminum thermostat housing cover is a direct replacement for the factory unit. It fits BMW E32 740i 740il E34 530i 540i E38 740i 740il 1995, E31 840i thru 1995.

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:
1993-1995 E34 BMW 530i 540i
1988-1994 E32 BMW 740i 740il
1995-2001 E38 BMW 740i 740il
1990-1999 E31 BMW 840i 840ci

Show More Show Less
Nissens - Corporate Logo
T#:579947
Part#: 60596A
Ships in 1 Business Day
$ 262.52

This product was last offered at the strikethrough price on
07-15-2026

$ 242.26 USD
$ 242.26 USD
Replace your leaking radiator to prevent major damage.
Victor Reinz - Corporate Logo
T#:362401
Part#: 11531710055
Ships in 8 Business Days
$ 2.99 USD
Free Shipping on orders $49 and up
Replace each time to work on your water pump

URO Engine Temperature Sensor
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:37757224
Part#: 13621284397
Ships in 1 Business Day
$ 7.99 USD
Free Shipping on orders $49 and up
This sensor functions as an oil temperature sensor in air-cooled cars and a coolant temperature sensor in water-cooled cars.

OEM Rein Coolant Hose - E34 525i M20
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6955
Part#: 11531720678
Ships in 1 Business Day
$ 11.99 USD
Free Shipping on orders $49 and up
Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs:
BMW 5 Series - 525i, 525i Wagon

--.
Show More Show Less
Rein Coolant Hose - E28, E30, E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379671
Part#: 13541719966
Ships in 1 Business Day
$ 6.11 USD
Free Shipping on orders $49 and up
$ 6.11 USD
Free Shipping on orders $49 and up
Thermostat to throttle housing

URO Water Pump - BMW M20 M50
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:639174
Part#: 11519070759
In Stock
$ 52.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
Nissens - Corporate Logo
T#:583900
Part#: 17111468469
Ships in 6 Business Days
$ 283.99 USD
$ 283.99 USD

Rein Water Hose (Right Outlet) - E32 E34
Also use- (Qty.) (1) 17 21 1 723 943 O-Ring. ¦ Right
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:593082
Part#: 17221728944
Ships in 3 Business Days
$ 28.99 USD
Free Shipping on orders $49 and up
$ 28.99 USD
Free Shipping on orders $49 and up
Transmission Oil Cooler to Water Manifold

OEM Rein Lower Radiator Hose - E34 525i
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6962
Part#: 11531722852
Ships in 1 Business Day
$ 12.99 USD
Free Shipping on orders $49 and up
Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Nissens - Corporate Logo
T#:583901
Part#: 17111468080
Back Ordered
$ 292.99 USD
$ 292.99 USD
​This radiator is made by Nissens, an original equipment supplier to BMW. The cooling system is a weak point on most BMWs, causing many BMWs to develop issues in as few as 50,000 miles. Overheating your engine can and usually will result in large repair bills and sometimes a warps the cylinder head(s), requiring intensive repair or full replacement. Prevent potential failure by replacing your radiator early, keeping your BMW happy and cool. This is the brand we use exclusively on our own BMWs, and think you should as well! As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!
Show More Show Less
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373138
Part#: 11531266459
Ships in 1 Business Day
$ 3.99 USD
Free Shipping on orders $49 and up
Water pump to thermostat housing


Burgaflex - Corporate Logo
T#:596374
Part#: 17221728944
Ships in 9 Business Days
$ 41.99

This product was last offered at the strikethrough price on
09-16-2026

$ 15.99 USD
Free Shipping
$ 15.99 USD
Free Shipping
The Burgaflex coolant return hose is built for drivers who demand dependable thermal management and total peace of mind.
Nissens - Corporate Logo
T#:554447
Part#: 17111468082
Ships in 1 Business Day
$ 273.99 USD
$ 273.99 USD