Home
Cooling

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

Clear BMW chassis

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:

Aluminum Thermostat Housing - E34, E36, Z3

10X Entries Into Our F80 M3 Sweepstakes

T#:579865

Part#: 54402

In Stock

Sale - Save 22% $ 25.99

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

$ 20.39 USD

Add to Wish List

Qty

Sale - Save 22%

$ 25.99

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

$ 20.39 USD

Add to Wish List

The plastic thermostat cover in your BMW is a known point of failure. Throughout the years of repeated contact with hot coolant, the plastic can crack and cause massive coolant leaks and potential overheating.

Show More Show Less

Bav Auto Spill-Proof Coolant / Antifreeze Funnel

10X Entries Into Our F80 M3 Sweepstakes

T#:580395

Part#: B8800082

Ships in 8 Business Days

Sale - Save 15% $ 33.99

This product was last offered at the strikethrough price on
08-19-2026

$ 28.99 USD

Add to Wish List

Qty

Sale - Save 15%

$ 33.99

This product was last offered at the strikethrough price on
08-19-2026

$ 28.99 USD

Add to Wish List

Multiple adapters include to fit a variety of vehicles.

Bav Auto Fan Clutch Wrench - 32mm

10X Entries Into Our F80 M3 Sweepstakes

T#:580348

Part#: B8800019

In Stock

Sale - Save 20% $ 29.99

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

$ 23.99 USD

Add to Wish List

Qty

Sale - Save 20%

$ 29.99

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

$ 23.99 USD

Add to Wish List

Used to remove your fan clutch

Aluminum Thermostat Housing Kit - M50

T#:397222

Part#: 14-009

Ships on Oct 27, 2026

$ 56.99 USD

Add to Wish List

Qty

$ 56.99 USD

Add to Wish List

Plastic thermostat housing cracked on your M50?

Here are your choices: you can wait for the plastic factory thermostat housing cover to break and cause major overheating. (Even with a new stock cover, it won’t take long.) Or you can install a thoughtfully engineered all-aluminum thermostat housing cover from Active Autowerke and never experience this type of failure again. Currently there is no factory upgraded part to this problem. This is an aluminum extruded part that has all of the openings machine properly to fit like factory; from the mounting bolt holes, the seating of the thermostat to the sealing opening for the ORANGE gasket. Forged to exact factory tolerances, everything fits and this unit is a true easy bolt-on – especially suited for racing or load conditions like heavy traffic, where engine temp can rise rapidly. The housing is guaranteed never to break from overheating or over-tightening, and its CNC machined surface ensures a precise seat.

Unit comes complete with a new ORANGE sealing gasket; a new thermostat is recommended but not included.
For hotter climates, a 71 degree thermostat is recommended over the 82 degree unit.

Anything and everything BMW is the mantra at Active Autowerke. Since 1981 they have been serving the BMW community with custom turbocharger kits to a myriad of other innovative and inspiring performance parts.

Show More Show Less

Bav Auto Fan Pulley Holder

10X Entries Into Our F80 M3 Sweepstakes

T#:580358

Part#: B8800031

Ships on Mar 15, 2027

Sale - Save 15% $ 23.99

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

$ 20.39 USD

Add to Wish List

Qty

Sale - Save 15%

$ 23.99

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

$ 20.39 USD

Add to Wish List

Used to remove your fan clutch

Bav Auto Angled Hose Pinch Plier Set - 2pc

10X Entries Into Our F80 M3 Sweepstakes

T#:580379

Part#: B8800058

In Stock

Sale - Save 25% $ 32.99

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

$ 24.74 USD

Add to Wish List

Qty

Sale - Save 25%

$ 32.99

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

$ 24.74 USD

Add to Wish List

Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.

Show More Show Less

Cooling Hose

10X Entries Into Our F80 M3 Sweepstakes

T#:38688896

Part#: 13541703865

Ships in 6 Business Days

Sale - Save 23% $ 10.99

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

$ 8.49 USD

Add to Wish List

Qty

Sale - Save 23%

$ 10.99

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

$ 8.49 USD

Add to Wish List

Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:640140

Part#: 17111712788

Ships on Jan 11, 2027

Sale - Save 39% $ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD

Add to Wish List

Qty

Sale - Save 39%

$ 3.99

This product was last offered at the strikethrough price on
09-02-2026

$ 2.44 USD

Add to Wish List

Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

Radiator Hose - Upper

10X Entries Into Our F80 M3 Sweepstakes

T#:38688897

Part#: 11531708499

Ships in 6 Business Days

Sale - Save 24% $ 14.99

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

$ 11.42 USD

Add to Wish List

Qty

Sale - Save 24%

$ 14.99

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

$ 11.42 USD

Add to Wish List

Hose Clamp - 40mm-60mm

10X Entries Into Our F80 M3 Sweepstakes

T#:5227

Part#: 040-60T

Ships in 5 Business Days

$ 3.99 USD

Add to Wish List

Qty

$ 3.99 USD

Add to Wish List

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.

Features:

9mm band width

6mm hex & slotted head

Smooth inside of band = optimal hose protection

OEM

430 Stainless steel band and housing with zinc plated steel screw

Asymmetric housing = even distribution of forces and prevents tilting of the clamp when tightening

Screw support = ease of assembly due to the safe guidance of the emerging band

Short housing saddle = even contact pressure = improved efficiency

Show More Show Less

Bremmen Engine Fan Blade - 11 Blades, 420mm - BMW M30 S38 M50 M52 S5...

10X Entries Into Our F80 M3 Sweepstakes

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

Add to Wish List

Qty

Sale - Save 22%

$ 23.99

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

$ 18.76 USD

Add to Wish List

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.

Show More Show Less

Radiator Hose - Lower

10X Entries Into Our F80 M3 Sweepstakes

T#:39295543

Part#: 11531726344

In Stock

Sale - Save 22% $ 22.99

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

$ 17.94 USD

Add to Wish List

Qty

Sale - Save 22%

$ 22.99

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

$ 17.94 USD

Add to Wish List

Select Vehicle

Purpose

Category

Home

Cooling

Brand

View All Brands

Price

Special Offers

On Sale (10)

Shipping