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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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Genuine BMW Front Panel - 41138398682

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T#:70831

Part#: 41138398682

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$ 1,162.99 USD

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$ 1,192.99

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$ 1,162.99 USD

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Genuine BMW FRONT PANEL

Upgrade your BMW with the Genuine BMW Front Panel - 41138398682 for enhanced durability and aesthetics. Crafted to OEM standards, this front panel ensures a perfect fit and seamless integration with your BMW vehicle.

Genuine BMW part guarantees quality and compatibility
Designed to OEM specifications for precise fit and function
Enhances the durability and aesthetics of your BMW
Easy installation process for hassle-free upgrade

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Oil Cooler Line O-Ring & Screw Kit

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T#:55281750

Part#: 1722OCLKT

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$ 20.60 USD

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This Genuine BMW Oil Cooler Line O-Ring & Screw Kit includes the exact factory components required to safely service your oil cooler hard lines.

Lower Radiator Mount & Bracket Refresh Kit

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T#:55245854

Part#: 1711117XKT

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$ 26.92 USD

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This Genuine BMW Lower Radiator Mount and Bracket Refresh Kit supplies the factory-original hardware needed to overhaul your lower radiator supports.

Auxiliary Fan Assembly - Suction

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T#:368739

Part#: 64508372039

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$ 649.99 USD

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$ 666.99

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$ 649.99 USD

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O-RING

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T#:580584

Part#: C32348

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$ 3.99

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$ 2.99 USD

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Genuine BMW Z3 Fan Mounting Base Ring - Z3 M52 2.8L Z3 S52 3.2L Z3 M5...

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T#:152627

Part#: 64548391748

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$ 34.99 USD

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Genuine BMW INTERMEDIATE RING

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

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T#:640497

Part#: 17107514964

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$ 53.75 USD

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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.

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Anti-Freeze Tester

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T#:641679

Part#: CTAA195

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$ 9.98 USD

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Tests all ethylene glycol solutions with radiator hot or cold

Gates Radiator Hose - Upper - E36, Z3

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T#:401921

Part#: 11531708499

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$ 39.99 USD

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New upper radiator hose for your BMW

Gates Water Hose - Z3

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T#:385314

Part#: 11531436988

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$ 37.99 USD

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Serves as a supply line to the radiator

BMW Radiator Expansion Tank Pressure Fitting

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Requires the use of a Motive Power Bleeder, sold separately

T#:380462

Part#: 1175

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$ 24.99 USD

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Allows you to check for leaks in the coolant system

Hepu Water Pump

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T#:582854

Part#: 11510393338

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$ 51.99 USD

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Includes O-ring

OEM VDO Auxiliary Fan Assembly - Suction - E36 M42, M44, Z3 M44 ...

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T#:3077091

Part#: 64508372039

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$ 243.99 USD

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Replacement Auxiliary Fan Assembly With Shroud from VDO

Elring Thermostat O-Ring - BMW S54 3.2L

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T#:45278657

Part#: 293.300

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$ 3.99 USD

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Seals the thermostat and thermostat housing to the water pump Replaces BMW # 11531318402

Elring Thermostat Gasket - BMW M44 1.9L

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T#:45244504

Part#: 743.390

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$ 7.99 USD

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This gasket prevents the coolant from leaking between the thermostat housing and the engine connection. If your gasket is cracked, replace it with this Elring gasket to prevent further coolant leaks.

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

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T#:640149

Part#: 11521712058

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$ 18.76 USD

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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.

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2 Pin Connector

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T#:33412932

Part#: 61132359999

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$ 8.24 USD

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Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02

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T#:639833

Part#: 13621433076

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$ 11.99 USD

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This is the coolant temperature sensor used in many BMW models from the late-1990s to the mid-2010s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer. This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement. 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.

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Coolant Temperature Sensor

For vehicles with production date up to 09/1998

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T#:594615

Part#: 13621703993

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$ 18.99 USD

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$ 18.99 USD

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This is the coolant temperature sensor used in many BMW models from the mid-1990s to the mid-2000s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer.

This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement.

This coolant temp sensor fits the following BMWs:
1996-1999 E36 BMW 323is 323ic 328i 328is 328ic M3, located in cylinder head
1999-2003 E39 BMW 540i, located on side of water pump
1999-2001 E38 BMW 740i 740il, located on side of water pump
1995-1996 E38 BMW 750il, located on side of water pump
1990-1999 E31 BMW 850i 850ci, located on side of water pump
2000-2006 E53 BMW X5 3.0i, located in cylinder head
2000-2006 E53 BMW X5 4.4i/4.6is/4.8is, located on side of water pump
1997-2002 Z3 BMW Z3 2.5i Z3 3.0i, located in cylinder head

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Meistersatz Temperature Sensor

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T#:379740

Part#: 13621433076

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$ 15.99 USD

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Monitors coolant / oil temperature

Water Pump O-Ring

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T#:592886

Part#: 11511714519

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$ 9.17 USD

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$ 9.17 USD

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Coolant Expansion Tank With Cap - 17111712835

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T#:46616014

Part#: EPK0012

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$ 29.99 USD

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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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Lower Radiator Mount - Priced Each

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T#:361005

Part#: 17111178412

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$ 2.03 USD

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This is the small lower rubber mount that goes on the bottom of the radiator. These mounts sit down into mount 17111723337. Fits left or right side - priced each

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