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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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Rein - Throttle Body Hose - E36 318i, Z3 1.9

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T#:33980410

Part#: 11531247398

Ships in 2 Business Days

$ 6.83 USD

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$ 6.83 USD

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Throttle Body Hose by Rein is a key component designed to optimize airflow to your BMW’s engine, ensuring enhanced throttle response and overall engine performance. This hose connects the air intake system to the throttle body, delivering a precise flow of air that improves fuel efficiency and engine power. Manufactured from high-quality, heat-resistant materials, the Throttle Body Hose by Rein is built to withstand extreme temperatures and pressures, making it a durable and long-lasting solution for your BMW. Available at Turner Motorsport, this hose is a direct fit replacement, ensuring easy installation and perfect compatibility with OEM standards.

Optimizes airflow to the throttle body, improving engine performance and efficiency
Enhances throttle response, contributing to smoother acceleration
Constructed from durable, heat-resistant materials, ensuring long-lasting performance
Direct fit replacement, allowing for easy installation and OEM compatibility
Boosts overall engine efficiency, improving fuel economy and engine power

Turner Motorsport offers the Throttle Body Hose by Rein as a reliable solution to maintain your BMW’s air intake system, ensuring smooth and efficient engine operation.

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Febi Cooling Hose Connector - E36, Z3

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T#:381786

Part#: 11531714738

Ships in 2 Business Days

$ 22.99

This product was last offered at the strikethrough price on
09-05-2026

$ 17.99 USD

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$ 17.99 USD

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A common point of failure.

Cooling Hose Connector

2X Entries Into Our F80 M3 Sweepstakes

T#:373131

Part#: 11531714738

Ships in 2 Business Days

$ 13.78 USD

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$ 13.78 USD

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O-Ring included. URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts.

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Oil Cooler Line O-Ring & Screw Kit

T#:55281750

Part#: 1722OCLKT

Ships in 1-2 days

$ 20.60 USD

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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.

Thermostat Housing Gasket

T#:367704

Part#: 11537509357

Ships in 1-2 days

14% off MSRP $ 9.74

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

$ 8.33 USD

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14% off MSRP

$ 9.74

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

$ 8.33 USD

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Needs to be replaced once removed

Water Pump O-Ring

T#:360658

Part#: 11511714519

Ships in 1-2 days

$ 19.99 USD

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$ 19.99 USD

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Brand new OEM seal from BMW for your vehicles water pump.

Gneuine BMW Water Pump & Thermostat Kit - BMW Z3 Z4 S54 3.2L ...

T#:48194754

Part#: ZS54WPTKT

Ships in 1-2 days

$ 1,167.99 USD

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$ 1,167.99 USD

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It is important that your coolant system is serviced at regular intervals to ensure a long life. Over time, coolant systems are exposed to high temperatures and repeated thermal cycling, which causes warping, cracking, and hardening of plastics and rubber components in the coolant system. This can lead to coolant leaks and overheating, which can result in extensive engine damage if not resolved in a timely manner. This Water Pump & Thermostat kit helps to address a few of the most problematic parts, replacing these items entirely to keep your cooling system running optimally and efficiently.

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Genuine BMW - Level 1 Expansion Tank Replacement Kit - E36, Z3 ...

T#:374427

Part#: 17111723520KT2

Ships in 1-2 days

$ 400.99

This product was last offered at the strikethrough price on
08-13-2026

$ 395.99 USD

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$ 395.99 USD

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Lower Radiator Mount & Bracket Refresh Kit

T#:55245854

Part#: 1711117XKT

Ships in 1-2 days

$ 26.92 USD

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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.

Water Pump Installation Hardware Kit

T#:55209926

Part#: 0071199KT

Ships in 1-2 days

$ 8.59 USD

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$ 8.59 USD

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This Genuine BMW water pump installation hardware kit is the exact factory refresh package needed to maintain the structural integrity of your cooling system's plumbing.

Genuine BMW Front Panel - 41138398682

T#:70831

Part#: 41138398682

Ships in 3 Business Days

3% off MSRP $ 1,192.99

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

$ 1,162.99 USD

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3% off MSRP

$ 1,192.99

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

$ 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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Auxiliary Fan Assembly - Suction

T#:368739

Part#: 64508372039

Ships in 3 Business Days

3% off MSRP $ 666.99

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

$ 649.99 USD

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3% off MSRP

$ 666.99

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

$ 649.99 USD

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O-RING

T#:580584

Part#: C32348

Ships in 7 Business Days

$ 3.99

This product was last offered at the strikethrough price on
05-07-2026

$ 2.99 USD

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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...

T#:152627

Part#: 64548391748

Ships in 7 Business Days

$ 34.99 USD

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$ 34.99 USD

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Genuine BMW INTERMEDIATE RING

Gates Radiator Hose - Upper - E36, Z3

T#:401921

Part#: 11531708499

Ships on Oct 28, 2026

$ 39.99 USD

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$ 39.99 USD

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New upper radiator hose for your BMW

Gates Water Hose - Z3

T#:385314

Part#: 11531436988

Ships on Oct 28, 2026

$ 37.99 USD

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$ 37.99 USD

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Serves as a supply line to the radiator

Hepu Water Pump

T#:582854

Part#: 11510393338

Ships on Nov 2, 2026

$ 79.75 USD

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$ 79.75 USD

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Includes O-ring

Water Pipe

T#:57725184

Part#: 11537502525

Ships on Nov 2, 2026

$ 64.99 USD

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$ 64.99 USD

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When you demand dependable thermal management and uncompromised engine cooling performance, the Burgaflex water pipe delivers.

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

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T#:3077091

Part#: 64508372039

Special Order: No Guaranteed ETA

$ 243.99 USD

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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

2X Entries Into Our F80 M3 Sweepstakes

T#:45278657

Part#: 293.300

Special Order: No Guaranteed ETA

$ 3.99 USD

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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

2X Entries Into Our F80 M3 Sweepstakes

T#:45244504

Part#: 743.390

Special Order: No Guaranteed ETA

$ 7.99 USD

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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...

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

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Sale - Save 22%

$ 23.99

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

$ 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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Radiator Fan Clutch

10X Entries Into Our F80 M3 Sweepstakes

T#:57304041

Part#: 11527831619

Ships on Dec 29, 2026

Sale - Save 10% $ 75.99

This product was last offered at the strikethrough price on
10-08-2026

$ 68.39 USD

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Sale - Save 10%

$ 75.99

This product was last offered at the strikethrough price on
10-08-2026

$ 68.39 USD

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Thermostat - 80°C

10X Entries Into Our F80 M3 Sweepstakes

T#:57507417

Part#: 11531318274

Ships on Jan 11, 2027

Sale - Save 10% $ 59.99

This product was last offered at the strikethrough price on
10-08-2026

$ 53.99 USD

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Sale - Save 10%

$ 59.99

This product was last offered at the strikethrough price on
10-08-2026

$ 53.99 USD

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Coolant Temperature Sensor

For vehicles with production date up to 09/1998

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:594615

Part#: 13621703993

Ships on Oct 30, 2026

$ 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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Water Pump O-Ring

2X Entries Into Our F80 M3 Sweepstakes

T#:592886

Part#: 11511714519

Back Ordered

$ 9.17 USD

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$ 9.17 USD

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Meistersatz Temperature Sensor

T#:379740

Part#: 13621433076

In Stock at Vendor

$ 15.99 USD

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$ 15.99 USD

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Monitors coolant / oil temperature

Coolant Expansion Tank With Cap - 17111712835

2X Entries Into Our F80 M3 Sweepstakes

T#:46616014

Part#: EPK0012

Back Ordered

$ 29.99 USD

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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

T#:361005

Part#: 17111178412

Back Ordered

$ 2.03 USD

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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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