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

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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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E36/E46/Z3/Z4 ECS Tuning Aluminum Water Pump Pulley - Black

Provides a bolt-on 8% water pump overdrive to increase cooling.

T#:363707

Part#: 001977ECS03A

In Stock

Sale - Save 5% $ 104.99

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

$ 99.74 USD

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Sale - Save 5%

$ 104.99

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

$ 99.74 USD

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Most of the pulleys on your BMW engine are plastic, which become brittle and frail over time and from engine bay heat. A failed pulley could leave you stranded which is why it is vital to inspect the pulleys during routine maintenance. This is an aluminum version of the stock water pump pulley used on the M50/M52/M52TU/M54 engine in the E36, E46, Z3, Z4, and other models. It uses the same hardware and the original belt as the stock plastic pulley. But the aluminum will last much longer.

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M50 M52 S50 S52 High Performance Aluminum Radiator

Oversized radiator, not a direct OEM fit.

T#:385051

Part#: 006084ECS01AKT

In Stock

Sale - Save 25% $ 420.99

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

$ 315.71 USD

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Sale - Save 25%

$ 420.99

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

$ 315.71 USD

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Every hero has its Achilles heel, and for many BMWs, it's the cooling system. Featuring an overabundance of brittle, crack-prone, leak-inducing plastic, the otherwise robust drivetrain is let down by a weak cooling system. Now, ECS has come to the rescue with a solution to cure those problems once and for all and leave the days of cracked plastic end tanks and coolant-stained driveways far behind. This radiator was designed with performance, durability, and good looks in mind to create a great all-around upgrade for any E36 owner, from the daily driver to the weekend warrior. Featuring fully aluminum construction, all the joints are precision TIG-welded for superior durability and show-car looks, with polished end tanks further adding to the great look of this radiator. The easily-stripped plastic drain plug and fan switch holes have been replaced with threaded alloy bungs in the stock locations, and the weak plastic tabs for the factory fan shroud have been replaced with beefy aluminum as well. Designed as a drop-in solution, this radiator will fit like a stock replacement, but will look and perform far better, while costing substantially less than the competition. What are you waiting for? Upgrade your cooling system today and leave your worries behind - and look great doing it - with this ECS Tuning Performance Aluminum Radiator. Note: Owners of automatic E36s utilizing a stock-style transmission cooler must drill two small holes in the lower frame of the radiator.

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E46 M3, Z4M ECS Tuning Aluminum Water Pump Pulley

T#:367060

Part#: 002778ECS01

Ships on Dec 8, 2026

Sale - Save 10% $ 100.99

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

$ 90.89 USD

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Sale - Save 10%

$ 100.99

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

$ 90.89 USD

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Most of the pulleys on your BMW engine are plastic, which become brittle and frail over time and from engine bay heat. A failed pulley could leave you stranded which is why it is vital to inspect the pulleys during routine maintenance. This is an aluminum version of the stock water pump pulley used on the S54 engine in the E46 M3, MZ3, and Z4M. It's the same size and uses the same hardware and the original belt as the stock plastic pulley. But the aluminum will last much longer.

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Radiator / Cooling System Pressure Tester- Bavarian Autosport ...

T#:580397

Part#: B8800084

In Stock

Sale - Save 15% $ 146.99

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

$ 124.94 USD

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Sale - Save 15%

$ 146.99

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

$ 124.94 USD

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Condor Speed Shop Fan Mounting Brackets For 16" SPAL Fans - E30/36/46...

T#:577555

Part#: SPALMC

In Stock

$ 66.00

This product was last offered at the strikethrough price on
06-01-2026

$ 62.99 USD

Limited Qty Sale

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$ 66.00

This product was last offered at the strikethrough price on
06-01-2026

$ 62.99 USD

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Stainless steel brackets for mounting a 16" SPAL fan on an OEM or aftermarket BMW radiator. The fan can be mounted on either side of the radiator. All mounting hardware is included. Fitment: e30, E36, E46

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Automatic Transmission Cooler - E36 Z3 E34

T#:2069

Part#: 17201728770

Ships in 2 Business Days

$ 207.15

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

$ 201.97 USD

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$ 201.97 USD

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This transmission fluid/oil cooler fits E36 318i 318is 318ti 323i 323is 325i 325is 328i 328is M3, E34 525i 530i 1993-1995 and Z3 1.9 2.3 2.5i 2.8 3.0i with automatic transmission.

This oil cooler fits the following BMWs:
1992-1998 E36 BMW 318i 318is 318ti 323is 325i 325is 328i 328is M3
1993-1995 E34 BMW 525i 525i Wagon
1994-1995 E34 BMW 530i 530i Wagon
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0ibr>

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Motorsport Thermostat - 60C - Complete with Housing - M54 / M52tu ...

T#:1171

Part#: TMS1171

Ships in 9 Business Days

$ 415.45 USD

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$ 415.45 USD

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This is a genuine BMW Motorsport part, designed specifically for BMW racing applications. We use this exact thermostat setup in our Championship-winning E46 330i race car. It is designed to be used on all M54 and M52TU double-VAN0S engines, as used in the 1999-2000 E46 323/328 and 2001-2005 E46 325/330. This 60 degree C (140 defrees F) thermostat comes complete with plastic thermostat housing. It does not use the plug and wiring for the stock DME so this should only be used with an aftermarket engine management system (Motec, Bosch, etc).

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.

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Motorsport Thermostat - 55 (NO LONGER AVAILABLE)

T#:337991

Part#: 11531417215

Back Ordered

Starting at $ 232.98 USD

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Starting at $ 232.98 USD

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E46M3 Motorsport Thermostat 55C (Also fits Euro E36 M3 engine) A Genuine BMW part this thermostat opens at a much lower temperature than stock to keep your S54 engine (or Euro S50/S52 engine) running cooler in race applications.

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