Home
Cooling

BMW Cooling System Parts & Accessories for BMW Z3 (1996-2002)

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:

Turner Motorsport HD Aluminum Coolant Expansion Tank Kit - M50/M52/S5...

For vehicles produced before 09/1998

T#:9998526

Part#: 008348LA01BKT

In Stock

Sale - Save 20% $ 423.99

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

$ 339.19 USD

Add to Wish List

Qty

Sale - Save 20%

$ 423.99

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

$ 339.19 USD

Add to Wish List

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

Show More Show Less

OEM Style Hose Clamps

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

Add to Wish List

Sale - Save 3%

$ 3.99

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

Starting at $ 3.87 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.

Show More Show Less

Aluminum Thermostat Housing - E34, E36, Z3

Up to production date 09/1998

T#:579865

Part#: 54402

Ships in 3 Business Days

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

Thermostat With Housing

T#:26494584

Part#: 11537509227

In Stock

Sale - Save 18% $ 60.99

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

$ 49.99 USD

Add to Wish List

Qty

Sale - Save 18%

$ 60.99

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

$ 49.99 USD

Add to Wish List

Upper Radiator Hose - Z3 2.3, 2.5i, 2.8, 3.0i

T#:19209

Part#: 11531716641

In Stock

Sale - Save 5% $ 44.99

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

$ 42.73 USD

Add to Wish List

Qty

Sale - Save 5%

$ 44.99

This product was last offered at the strikethrough price on
06-25-2026

$ 42.73 USD

Add to Wish List

This is the upper radiator hose that goes from the thermostat the the upper left of the radiator.

This item fits the following BMWs:
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i

Show More Show Less

Lower Radiator Hose - Z3 2.3, 2.5i, 2.8, 3.0i

T#:19210

Part#: 11531716642

In Stock

Sale - Save 2% $ 44.99

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

$ 43.99 USD

Limited Qty Sale

Add to Wish List

Qty

Sale - Save 2%

$ 44.99

This product was last offered at the strikethrough price on
06-25-2026

$ 43.99 USD

Limited Qty Sale

Add to Wish List

This is a replacement Lower Radiator Hose for Z3. This hose goes from the thermostat housing to the lower right side of the radiator. When replacing any cooling component it is a good idea to check all radiator hoses and replace as necessary.

This item fits the following BMWs:
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i

Show More Show Less

Engine Cooling Fan Clutch Blade - Z3

T#:35728

Part#: 11527831113

In Stock

Sale - Save 6% $ 100.99

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

$ 95.41 USD

Add to Wish List

Qty

Sale - Save 6%

$ 100.99

This product was last offered at the strikethrough price on
06-25-2026

$ 95.41 USD

Add to Wish List

Genuine BMW Fan 11 Blade - D=420mm

Fits BMW Engines including:
S54

Genuine BMW Water Pump Pulley

For vehicles with production date from 09/1998

T#:4472

Part#: 11511436590

In Stock

Sale - Save 6% $ 73.99

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

$ 69.65 USD

Add to Wish List

Qty

Sale - Save 6%

$ 73.99

This product was last offered at the strikethrough price on
06-25-2026

$ 69.65 USD

Add to Wish List

SEE T#337981

Water Pump - M50/M52 With Composite Impeller (Original BMW)

T#:623

Part#: 11517527799

Ships in 6 Business Days

Sale - Save 5% $ 237.99

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

$ 225.42 USD

Add to Wish List

Qty

Sale - Save 5%

$ 237.99

This product was last offered at the strikethrough price on
06-25-2026

$ 225.42 USD

Add to Wish List

The early M50/M52 engines had a serious weak point: the water pump. BMW originally used a plastic impeller in the water pump. This would degrade over time and eventually break apart. Your car overheats immediately. This water pump is the latest updated part with a composite impeller. The composite is stronger and lighter than the less-expensive metal impeller version. And it does not suffer from the problems of the early plastic design.

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 waterpump fits the following BMWs:
1992-1999 E36 3 series - 323is, 323ic, 325i, 325is, 325ic, 328i, 328ic, M3 3.0 (S50/US), M3 3.2 (S52)
1991-1995 E34 BMW 525i
1997-1998 E39 5 series - 528i
1996-1998 Z3 - Z3 2.8,
1998-2000 Z3 Roadster/Coupe - M Roadster, M Coupe (S52)

Show More Show Less

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

T#:640140

Part#: 17111712788

In Stock

Sale - Save 39% $ 3.99

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

$ 2.44 USD

Add to Wish List

Qty

Sale - Save 39%

$ 3.99

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

$ 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.

Cooling Hose

T#:38688896

Part#: 13541703865

In Stock

Sale - Save 26% $ 10.99

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

$ 8.15 USD

Add to Wish List

Qty

Sale - Save 26%

$ 10.99

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

$ 8.15 USD

Add to Wish List

Meyle Expansion Tank Cap

We Price Match - Give Us A Call or Chat!

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

Add to Wish List

Qty

Sale - Save 40%

$ 14.99

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

$ 8.99 USD

Add to Wish List

Replace worn or missing pieces.

Radiator Hose - Upper

T#:38688897

Part#: 11531708499

Ships on Aug 19, 2026

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

Bav Auto Coolant Expansion Tank - E53 X5, Z3 2.3 2.5i 2.8 3.0i ...

T#:640497

Part#: 17107514964

In Stock

Sale - Save 16% $ 63.99

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

$ 53.75 USD

Add to Wish List

Qty

Sale - Save 16%

$ 63.99

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

$ 53.75 USD

Add to Wish List

This radiator expansion tank is used on E53 X5 4.4i and 4.6is with M62 engine, and Z3 2.3 2.5i 2.8 3.0i from 1999-2002. It is a common failure item as the plastic weakens over time and stress cracks will lead to coolant leaks. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

Show More Show Less

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

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

Select Vehicle

Purpose

Category

Home

Cooling

Brand

Price

Special Offers

Shipping