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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EMP/Stewart High Performance Water Pump for BMW M50/M52/M54/S50/S52 6 Cylinder Engines
EMP/Stewart High Performance Water Pump for BMW M50/M52/M54/S50/S52 6...
Stewart Components - Corporate Logo
T#:3780
Part#: 888010330
In Stock
$ 219.99

This product was last offered at the strikethrough price on
06-15-2026

$ 204.99 USD
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$ 204.99 USD
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This high performance water pump is a direct replacement pump designed to fit a wide range of BMW engines with no modifications. That includes accepting the Factory Fan Clutch. The front of the BMW High Performance Water Pump is stock appearing giving it that classic BMW look while the back is all business. Features up to 20% increase of water flow over stock pump, and it TWICE as efficient as factory pump, much less parasitic drag than other pumps, stainless steel impeller, heavy duty bearing, high quality water seal. Manufactured by EMP / Stewart Components. THIS PUMP COMES WITH A LIMITED LIFETIME WARRANTY

Fits all US Spec M50/52/54 and S50/52 6 cylinder engines including:
E36 chassis 1992-1999 325,328, 323 and M3
E46 chassis 1999-2005 323,325,328 &330
E34 chassis 1991-1995 525i
E39 chassis 1997-2003 525i, 528i & 530i
E53 X5 SAV 1999-2003 6 cylinder models
Z3 2.8 and 3.0 6 cylinder engines.
Z4 (Not M) including Z4 2.5 & 3.0
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Condor Speed Shop Fan Mounting Brackets For 16" SPAL Fans - E30/36/46 M3
Condor Speed Shop Fan Mounting Brackets For 16" SPAL Fans - E30/36/46...
Condor Speed Shop - Corporate Logo
T#:577555
Part#: SPALMC
Ships in 2 Business Days
$ 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
Limited Qty Sale
Free Shipping
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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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Moroso Performance Aluminum Expansion Tank - E36, Z3
Moroso Performance Aluminum Expansion Tank - E36, Z3
For vehicles with a production date before 09/1998
Moroso - Corporate Logo
T#:568887
Part#: 63791
In Stock
$ 445.99

This product was last offered at the strikethrough price on
08-07-2026

$ 418.99 USD
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$ 445.99

This product was last offered at the strikethrough price on
08-07-2026

$ 418.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Add to Wish List
If you have ever experienced a leaking plastic BMW expansion tank you will realize the value of this aluminum version straight away. Even if a failure has not happened to you, it's easy to tell this tank is much stronger and more durable than the plastic used in the stock design. The original BMW plastic tanks suffer from leaks and failures with no warning. While being lightweight and recyclable the design and construction of the stock tank is just not up for reliable long term use. Moroso coolant expansion tanks are all pressure tested for guaranteed leak-free operation and utilizes the stock pressure cap to prevent excessive pressure in the cooling system from blowing off a radiator hose or seal! Features: Each cooling system expansion tank includes a 1/8 in. pipe overflow fitting at neck, a 1/4 in. NPT water intake bung, and a 1/2 in. bung at the bottom for plumbing a line to the radiator Rugged 6061-T6 billet aluminum filler necks welded to tank to withstand continuous removal and installation of cap 100% pressure tested to eliminate leaks Accepts a standard-size radiator cap
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