BMW Cooling System Parts & Accessories for BMW 3 Series E36 (1992-1998)

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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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Turner Motorsport - Corporate Logo
T#:9998526
Part#: 008348LA01BKT
Ships on Nov 12, 2026
Sale - Save 20% $ 423.99

This product was last offered at the strikethrough price on
06-14-2026

$ 339.19 USD
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Sale - Save 20%
$ 423.99

This product was last offered at the strikethrough price on
06-14-2026

$ 339.19 USD
Free Shipping

Our Turner Motorsport's full aluminum expansion tank was designed and engineered in house to help with the weak point in your E36 cooling system. The coolant expansion tank goes through heat cycles over and over again from regular driving, it is important that your expansion tank is doing its job to retain coolant to keep your engine operating temperatures down and keep your engine bay clean. Not only is this a major upgrade but also a great maintenance item to replace. Our expansion tank was designed to fit the OEM hoses for an easy install and comes with all the upgraded items you will need for a clean install,

If your E36 needs a new expansion tank, make sure this is the last expansion tank you ever need to buy. Our coolant expansion tank has a full aluminum construction and wrinkle black powder coat for durability. Expansion tank kit comes with all the accessories you need to replace your expansion tank once, and never have to worry about it again.

Aluminum Coolant Expansion Tank Features:

- Maintains stock coolant capacity and expansion volume

- Designed to maintain OE coolant elevation, preventing air pockets

- Baffled tank ensures that air pockets cannot be introduced during aggressive driving and provides accurate coolant level reading

- Carefully designed bleed passage prevents the introduction of air as the engine cools

- Turner engraved internal fill level

- TIG welded 5052 aluminum construction

- All bungs are machined to fit factory hose ends

Kit contents:

Turner Aluminum Expansion Tank
Coolant level sensor
Expansion tank cap
Heavy duty bleeder screw
Flared coolant pressure release line
Hardware for installation

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Heavy Duty Transmission Crossmember - E36 Getrag 420G Swap
For six-speed swapped, Getrag 420G-equipped vehicles only.
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:49508931
Part#: 057078LA01
In Stock
Sale - Save 25% $ 189.99

This product was last offered at the strikethrough price on
06-14-2026

$ 142.49 USD
Free Shipping
Sale - Save 25%
$ 189.99

This product was last offered at the strikethrough price on
06-14-2026

$ 142.49 USD
Free Shipping

The 6-speed Getrag 420G transmission, found in the European E36 M3 Evolution and E46 M3, has become an increasingly popular swap amongst E36 owners. Its increased strength, longevity, and overdrive sixth gear make it a great choice for both track cars and daily drivers. Unfortunately, many of the components needed to complete this transplant have become hard to source. Despite increased demand from enthusiasts, BMW has blocked the sale of European E36 M3 parts into North America.

Recognizing this issue, we set out to develop a replacement for the unavailable, 420G-specific transmission crossbrace. Our initial investigation revealed that the factory cast aluminum construction was failure-prone, so durable 5GA 1018 steel was chosen to provide a lasting upgrade. The Turner Motorsport Heavy-Duty Transmission Crossmember is finished in a brilliant silver powder coat to resist corrosion and maximize appearance. Despite being much stronger than the factory crossmember, our design is dimensionally identical, ensuring a perfect fit with your six-speed swap.

Design:

Manufactured from durable 5GA 1018 steel - much stronger than OEM cast aluminum construction Finished in brilliant silver powder coating for maximum corrosion resistance Steel gussets are welded to the main bracket for added strength and power-holding capability Integrated locating dowels prevent bushing rotation and ensure proper alignment under load Dimensionally identical to the OEM part - fully compatible with OE-style bushings and factory hardware Features & Benefits:

Direct replacement for Genuine European BMW part number 23702227892 Finished in brilliant silver powder coating for maximum corrosion resistance Retains factory mounting points and driveline geometry for hassle-free installation Product Development:

Our Heavy Duty Transmission Crossmember was designed, engineered, tested, and quality inspected by our Research and Development team. We strive for nothing but the highest level of precision and quality through leading-edge product development technology, including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

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OEM Style Hose Clamps
10X Entries Into Our F80 M3 Sweepstakes
Turner Motorsport - Corporate Logo
T#:338927
Part#: HOSE-CLAMPS
In Stock
Sale - Save 3% $ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD
Free Shipping on orders $49 and up
Sale - Save 3%
$ 3.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 3.87 USD
Free Shipping on orders $49 and up
Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.
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Rein - Corporate Logo
T#:6965
Part#: 11531738053
In Stock
$ 44.99 USD
Free Shipping on orders $49 and up
This is the large "T" shaped heater hose that connects the engine with the radiator expansion tank, heater core and throttle body. Fits E36 3 series with M50 or S50 engine.

This item fits the following BMWs:
1992-1999 E36 BMW 325i 325is 325ic M3
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OEM Rein Lower Radiator Hose - E36 318 M42 1.8L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6957
Part#: 11531721709
Ships in 4 Business Days
$ 21.99 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.
OEM Rein Cooling Hose - E36, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:362532
Part#: 13541703865
Ships in 4 Business Days
$ 20.99 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.

Rein Thermostat - 88�C - E30, E34, E36, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591800
Part#: 11537511580
In Stock at Vendor
$ 37.99 USD
Free Shipping on orders $49 and up
Common point of failure in the cooling system.
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.
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Rein - Corporate Logo
T#:14593
Part#: 11531740649
In Stock
$ 30.99

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

$ 18.18 USD
Free Shipping on orders $49 and up
$ 18.18 USD
Free Shipping on orders $49 and up
This is the radiator expansion tank return hose for the cooling system on E36 models with the M52 or S52 engine. This hose goes from the expansion tank to the main coolant return pipe.

This item fits the following BMWs:
1996-1998 E36 BMW 323is 323ic 328i 328is 328ic M3
1996-1998 Z3 BMW Z3 2.8
1998-2000 Z3 BMW M Roadster M Coupe
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Rein Thermostat - 92C
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:34114254
Part#: 11537511083
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up

Rein Thermostat 92C is an essential component designed to regulate the temperature in BMW engines, ensuring the vehicle runs at optimal performance while preventing overheating. Engineered to open at 92°C, this high-quality thermostat allows for precise coolant flow, keeping the engine at the correct temperature for maximum efficiency. Available at Turner Motorsport, the Rein Thermostat 92C is designed specifically for BMW vehicles, offering a direct-fit replacement that ensures easy installation and reliable operation.

  • Opens at 92°C for precise temperature regulation
  • Designed specifically for BMW engines for perfect fit and compatibility
  • Prevents engine overheating and helps protect critical engine components
  • Enhances overall engine efficiency and performance
  • Manufactured from durable materials for long-lasting reliability
  • Direct-fit replacement for easy installation

The Rein Thermostat 92C is the ideal solution for BMW owners who want to ensure their vehicle’s engine operates efficiently and reliably, providing optimal temperature control and enhanced performance.

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Rein - Corporate Logo
T#:591144
Part#: 11531265084
In Stock
$ 2.99 USD
Free Shipping on orders $49 and up
This O-ring seals the thermostat to the cylinder head.
Rein - Corporate Logo
T#:340541
Part#: 17111742231
In Stock
$ 17.99 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.
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Rein Coolant Hose - E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591767
Part#: 11531703844
In Stock
$ 8.14 USD
Free Shipping on orders $49 and up
This is the heater hose that connects between the heater valve and the heater return hose
Rein Radiator Hose - Upper - E36, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6973
Part#: 11531743535
In Stock
$ 16.99 USD
Free Shipping on orders $49 and up
OEM BMW ENGINE WATER HOSE 11531743535.--

This item fits the following BMWs:
BMW 3 Series - 318i, 318i Convertible, 318is, 318ti
BMW Z Series - Z3 1.9

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OEM Rein Lower Radiator Hose - E36, Z3 M44 1.9L
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6873
Part#: 11531247261
Ships in 2 Business Days
$ 10.99 USD
Free Shipping on orders $49 and up

Connects the thermostat to the lower radiator. 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 3 Series - 318i, 318i Convertible, 318is, 318ti
BMW Z Series - Z3 1.9

​Fits BMW Engines including:
M44

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OEM Rein Heater Core Return Hose - E36 318 M42/44
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:11079
Part#: 64211387010
Ships in 4 Business Days
$ 6.11 USD
Free Shipping on orders $49 and up

Runs from the water valve to the engine. 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 3 Series - 318i, 318i Convertible, 318is, 318ti

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OEM Rein Upper Radiator Hose - E36 325/328/323/M3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:1299
Part#: 11531708499
In Stock
$ 12.99 USD
Free Shipping on orders $49 and up
This is the coolant hose that connects the upper radiator outlet to the thermostat housing. Any time you are into the cooling system, either for a radiator, water pump, thermostat, etc, you should consider installing fresh new hoses as a preventative measure.

This item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1997-1998 Z3 BMW Z3 2.8
1998-2000 Z3 BMW M Roadster M Coupe with S52 engine
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Coolant Hose from Expansion Tank - E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:6964
Part#: 11531730351
Ships in 2 Business Days
$ 18.79 USD
Free Shipping on orders $49 and up
This coolant hose connects the water hose part #11531738053 to the radiator coolant expansion tank.Fits E36 3 series with M50, S50 or S52 engine.

This item fits the following BMWs:
1992-1998 E36 BMW 325i 325is 325ic M3
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Rein Water Hose - 11531247915 - E36
For vehicles with a production date from 07/1994
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:35735
Part#: 11531247915
Ships in 4 Business Days
$ 9.99 USD
Free Shipping on orders $49 and up
$ 9.99 USD
Free Shipping on orders $49 and up


BMW Water Hose -
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M42

Expansion Tank Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375751
Part#: 17111723521
Ships in 2 Business Days
$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
Connects the expansion tank to the radiator

OEM Rein Coolant Hose - E36 Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379763
Part#: 11531743295
In Stock at Vendor
$ 13.99 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.

Rein - Throttle Body Hose - E36 318i, Z3 1.9
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:33980410
Part#: 11531247398
Ships in 2 Business Days
$ 6.83 USD
Free Shipping on orders $49 and up

Throttle Body Hose by Rein is a key component designed to optimize airflow to your BMW’s engine, ensuring enhanced throttle response and overall engine performance. This hose connects the air intake system to the throttle body, delivering a precise flow of air that improves fuel efficiency and engine power. Manufactured from high-quality, heat-resistant materials, the Throttle Body Hose by Rein is built to withstand extreme temperatures and pressures, making it a durable and long-lasting solution for your BMW. Available at Turner Motorsport, this hose is a direct fit replacement, ensuring easy installation and perfect compatibility with OEM standards.

  • Optimizes airflow to the throttle body, improving engine performance and efficiency
  • Enhances throttle response, contributing to smoother acceleration
  • Constructed from durable, heat-resistant materials, ensuring long-lasting performance
  • Direct fit replacement, allowing for easy installation and OEM compatibility
  • Boosts overall engine efficiency, improving fuel economy and engine power

Turner Motorsport offers the Throttle Body Hose by Rein as a reliable solution to maintain your BMW’s air intake system, ensuring smooth and efficient engine operation.

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Rein Radiator Hose - Lower - E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:348769
Part#: 11531726344
Ships in 4 Business Days
$ 15.99

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

$ 13.99 USD
Free Shipping on orders $49 and up
$ 13.99 USD
Free Shipping on orders $49 and up
Replace your radiator hose before a blown hose leaves you stranded.
Rein Coolant Hose - E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:35875
Part#: 11531703844
Ships in 1-2 days
$ 9.17 USD
Free Shipping on orders $49 and up
BMW HOSE F RADIATOR AND ENGINE R


Water Pump O-Ring
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592886
Part#: 11511714519
Back Ordered
$ 9.17 USD
Free Shipping on orders $49 and up
Coolant Expansion Tank With Cap - 17111712835
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616014
Part#: EPK0012
Back Ordered
$ 29.99 USD
Free Shipping on orders $49 and up
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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