Home
Cooling

BMW Cooling System Parts & Accessories for BMW Z4 M Roadster S54 (2003-2008)

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:

Red Line Water Wetter Coolant Additive

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:394769

Part#: REDLINE5A

In Stock

Starting at $ 15.99 USD

Add to Wish List

Starting at $ 15.99 USD

Add to Wish List

Water Wetter is a unique wetting agent for cooling systems which reduces coolant temperatures by as much as 30*F. This liquid product can be used to provide rust and corrosion protection in plain water for racing engines, which provides much better heat transfer properties than glycol-based antifreeze.

Show More Show Less

Band Hose Clamp | 12-20mm 3/8"/9mm

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:304266

Part#: 003402ECS06A-03

In Stock

Sale - Save 25% $ 4.99

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

$ 3.74 USD

Add to Wish List

Qty

Sale - Save 25%

$ 4.99

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

$ 3.74 USD

Add to Wish List

Secure hoses in your BMW effortlessly with the ECS 3/8" / 9mm Band Hose Clamp (12-20mm). Specifically designed for BMW models, this clamp ensures a snug fit and reliable hold for hoses measuring between 12mm to 20mm. Crafted with durable materials, these clamps provide exceptional resistance against leaks and are ideal for various automotive applications. Upgrade your BMW's hose security with these reliable ECS hose clamps.

Show More Show Less

BMW Expanding Rivet

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:7436

Part#: 17111712963

In Stock

$ 1.99 USD

Add to Wish List

Qty

$ 1.99 USD

Add to Wish List

The most common use for this rivet is to secure the radiator fan shroud to the radiator. This rivet can also be used on a wide variety of other applications as well.

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.

Show More Show Less

Rein Coolant Bleeder Screw CHW1575 - Priced Each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:591955

Part#: 17111712788

In Stock

$ 4.99 USD

Add to Wish List

Qty

$ 4.99 USD

Add to Wish List

Coolant Bleeder Screw is a critical component for maintaining your BMW’s cooling system. Designed to release trapped air from the coolant lines, this screw ensures efficient coolant flow and prevents overheating. Specifically engineered for BMW models, it enhances the overall performance and longevity of your engine by maintaining proper temperature regulation. Comes with O-Ring.

Show More Show Less

90-110mm 3/8"/9mm Band Hose Clamp

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:341281

Part#: 003402ECS06A-13

In Stock

Sale - Save 40% $ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

Add to Wish List

Qty

Sale - Save 40%

$ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

Add to Wish List

ECS Tuning 304 Stainless Steel Hose Clamps

Once again, ECS Tuning has found a way to make life easier for working on your car. Need new hose clamps but don't want to wait to order it from the dealership or pay more than you should for a hose clamp? That's where we come in! These are full 304 stainless steel hose clamps with various band widths for your convenience. They are German style using T-bolts to adjust in size to your required diameter. Never pay dealer pricing again, but still get the quality you love here at ECS Tuning.

Made from high-quality 304 stainless steel for durability
German-style design with T-bolts allows for easy size adjustment
Various band widths for versatile use
Avoid dealership pricing without compromising on quality
Perfect for BMW enthusiasts seeking affordable yet reliable hose clamps

Show More Show Less

OEM Rein Expansion Tank Cap - BMW E32 E34 E36 E38 E39 E46 & More ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:340541

Part#: 17111742231

In Stock

$ 17.99 USD

Add to Wish List

Qty

$ 17.99 USD

Add to Wish List

This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

Show More Show Less

Water Pump Installation Hardware Kit

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:55209926

Part#: 0071199KT

In Stock

$ 7.94 USD

Add to Wish List

Qty

$ 7.94 USD

Add to Wish List

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.

Radiator Pressure Test kit 14 pc

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:3629267

Part#: ATD3300

Ships in 7 Business Days

$ 497.99 USD

Add to Wish List

Qty

$ 497.99 USD

Add to Wish List

Adapters for most European and domestic vehicles

E46 323/325/328/330 Manual, Z4 OEM Behr Radiator

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:338021

Part#: 17119071518

In Stock at Vendor

Starting at $ 249.99 USD

Add to Wish List

Starting at $ 249.99 USD

Add to Wish List

This is a BEHR brand (OEM supplier to BMW) replacement radiator for all 1999-2006 E46 3 series (non-M), including 323i, 323Ci, 328i, 328Ci, 325i, 325Ci, 330i, 330Ci, and Z4 2.5 and 3.0. Compare to BMW list price of $318! Save big, while still getting the highest quality radiator available for your BMW.

This radiator fits the follow BMWs: :
Only for Manual Transmission
1999-5/2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi - Not for cars with M56 engine

2003-2006 E85 BMW Z4 2.5i Z4 3.0i - M54 engine
2006-2008 E85 BMW Z4 M Roadster M Coupe

Show More Show Less

Febi Freeze Plug - 11111714712

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

T#:6570

Part#: 11111714712

In Stock at Vendor

$ 3.99

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

$ 1.81 USD

Add to Wish List

Qty

$ 1.81 USD

Add to Wish List

ENGINE COVER LID 11111714712

Fan mounting pin - priced each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:598910

Part#: 30130013

In Stock at Vendor

$ 6.99 USD

Add to Wish List

Qty

$ 6.99 USD

Add to Wish List

Wire pin used to mount electric fan directly to radiator.

16" Fan shroud gasket

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:598825

Part#: 30130074

In Stock at Vendor

$ 17.99 USD

Add to Wish List

Qty

$ 17.99 USD

Add to Wish List

Provides .25" stand off from radiator, does not work with high output fans.

Universal 10" Electric Fan - Black

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:378434

Part#: MMFAN10

In Stock at Vendor

$ 88.99 USD

Add to Wish List

Qty

$ 88.99 USD

Add to Wish List

WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.

Show More Show Less

CSF Universal Large Single-Pass Oil Cooler - Universal Application ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Universal fitment design - modifications may be necessary to run this cooler

T#:53608839

Part#: 8371

Ships in 4 Business Days

$ 499.00 USD

Add to Wish List

Qty

$ 499.00 USD

Add to Wish List

CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.

Show More Show Less

Hose Clamp 2 5/16" - 3 1/4" - priced each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:376806

Part#: 54155K23

Ships in 1-2 days

$ 4.99 USD

Add to Wish List

Qty

$ 4.99 USD

Add to Wish List

Hose Clamp 2 5/16" - 3 1/4"

Ensure secure hose connections with the Hose Clamp 2 5/16" - 3 1/4", a versatile and reliable solution for various applications. Crafted from durable materials, this clamp offers superior strength and corrosion resistance. Its adjustable design allows for a snug fit, reducing the risk of leaks and ensuring optimal performance. Upgrade your hose connections with the precision and reliability of the Hose Clamp 2 5/16" - 3 1/4".

Versatile and reliable solution for various applications
Superior strength and corrosion resistance
Adjustable design for a snug fit
Reduces risk of leaks for optimal performance

Show More Show Less

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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:48194754

Part#: ZS54WPTKT

Ships in 6 Business Days

$ 1,166.99 USD

Add to Wish List

Qty

$ 1,166.99 USD

Add to Wish List

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.

Show More Show Less

Oil Cooler Line O-Ring & Screw Kit

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:55281750

Part#: 1722OCLKT

Ships in 3 Business Days

$ 20.60 USD

Add to Wish List

Qty

$ 20.60 USD

Add to Wish List

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

O-RING

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:580584

Part#: C32348

In Stock

$ 3.99

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

$ 2.99 USD

Add to Wish List

Qty

$ 2.99 USD

Add to Wish List

Genuine BMW Fan Shroud

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:22549

Part#: 17427542913

Ships in 9 Business Days

2% off MSRP $ 222.99

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

$ 217.99 USD

Add to Wish List

Qty

2% off MSRP

$ 222.99

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

$ 217.99 USD

Add to Wish List

Genuine BMW Fan Shroud
This item fits the following BMW Chassis:
E85 Z4M,E85 Z4,E86 Z4

Fits BMW Engines including:
M54,S54

Anti-Freeze Tester

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:641679

Part#: CTAA195

Ships on Jul 24, 2026

$ 9.98 USD

Add to Wish List

Qty

$ 9.98 USD

Add to Wish List

Tests all ethylene glycol solutions with radiator hot or cold

BMW Radiator Expansion Tank Pressure Fitting

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Requires the use of a Motive Power Bleeder, sold separately

T#:380462

Part#: 1175

Ships on Jul 31, 2026

$ 24.99 USD

Add to Wish List

Qty

$ 24.99 USD

Add to Wish List

Allows you to check for leaks in the coolant system

Water Pump Bolt

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:15478736

Part#: 11 510392553

Ships on Jul 31, 2026

$ 5.99 USD

Add to Wish List

Qty

$ 5.99 USD

Add to Wish List

Secures the water pump in place.

Elring Thermostat O-Ring - BMW S54 3.2L

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:45278657

Part#: 293.300

Special Order: No Guaranteed ETA

$ 3.99 USD

Add to Wish List

Qty

$ 3.99 USD

Add to Wish List

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

2 Pin Connector

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:33412932

Part#: 61132359999

Ships on Jul 28, 2026

Sale - Save 25% $ 10.99

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

$ 8.24 USD

Add to Wish List

Qty

Sale - Save 25%

$ 10.99

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

$ 8.24 USD

Add to Wish List

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

Show More Show Less

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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:639833

Part#: 13621433076

In Stock

Sale - Save 20% $ 14.99

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

$ 11.99 USD

Add to Wish List

Qty

Sale - Save 20%

$ 14.99

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

$ 11.99 USD

Add to Wish List

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.

Show More Show Less

Fluid Level Sensor

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

T#:5973204

Part#: 17117546548

Special Order: No Guaranteed ETA

$ 13.99 USD

Add to Wish List

Qty

$ 13.99 USD

Add to Wish List

MEYLE-ORIGINAL: True to OE fluid level sensor. Used in multiple locations. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. Comparable OE Cross Reference - 17117546548

Show More Show Less

Meistersatz Temperature Sensor

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:379740

Part#: 13621433076

Ships in 4 Business Days

$ 15.99 USD

Add to Wish List

Qty

$ 15.99 USD

Add to Wish List

Monitors coolant / oil temperature

Radiator Support Bracket

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:14122755

Part#: 17117514402

Special Order: No Guaranteed ETA

$ 8.99 USD

Add to Wish List

Qty

$ 8.99 USD

Add to Wish List

Mounts to top of radiator bracket, 2 per vehicle.

Lower Radiator Mount - Priced Each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:361005

Part#: 17111178412

Back Ordered

$ 2.03 USD

Add to Wish List

Qty

$ 2.03 USD

Add to Wish List

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

1
2
3

Select Vehicle

Purpose

Category

Home

Cooling

Brand

View All Brands

Price

Special Offers

Shipping