BMW Thermostats for BMW Z Series E85/6 (2003-2008)

Clear BMW chassis

BMW thermostats are known to fail, but luckily they typically fail wide open - meaning that your car can still cool. We offer thermostats from various OE suppliers we trust along with upgraded motorsport specific thermostats where applicable to make sure your BMW stays cool on track.

Sort By:

Water Pump And Thermostat Kit - BMW N52 3.0L

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

T#:17073598

Part#: 11537549476KT

In Stock

Sale - Save 25% $ 424.99

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

$ 318.83 USD

Add to Wish List

Qty

Sale - Save 25%

$ 424.99

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

$ 318.83 USD

Add to Wish List

Includes everything you may need to replace your water pump and thermostat.

Water Pump And Thermostat Kit

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

T#:5376274

Part#: 11517586925TKT

In Stock

Sale - Save 25% $ 448.99

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

$ 337.56 USD

Add to Wish List

Qty

Sale - Save 25%

$ 448.99

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

$ 337.56 USD

Add to Wish List

Everything you need to replace your water pump and thermostat. The water pumps in these BMW models are known for failure near 80,000 miles is a very common issue often times leaving the owner stranded. The aftermarket kit offered provides a single stop for water pump and thermostat replacement needs to save the search and get you back on the road. Kit includes: Mahle-Behr thermostat Water pump Genuine BMW coolant thermostat to water pump hose Mounting hardware required for both the thermostat and water pump

Show More Show Less

Thermostat Replacement Kit - E39 E46 E60 E53 Z3 Z4 With M54, M52TU En...

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

T#:554073

Part#: 11537509227KT3

Ships on Jan 4, 2027

$ 101.99 USD

Add to Wish List

Qty

$ 101.99 USD

Add to Wish List

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

Mahle-Behr thermostat with gasket
Thermostat mounting hardware
1 liter of coolant

Applications:
1999-2003 E39 528i, 525i, 530i sedan, touring wagon (M52TU engine, M54 engine)
1999-2005 E46 323, 328, 325, 330 sedan, coupe, cabrio, touring wagon (M52TU engine, M54 engine)
2004-2005 E60 525i, 530i sedan, touring wagon (M54 engine)
2001-2006 E53 X5 3.0 (M54 engine)
2004-2006 E83 X3 2.5i X3 3.0i (M54 engine)
1999-2002 Z3 2.3. Z3 2.5i, 2.8 Z3 3.0i (M54 engine)
2003-2005 Z4 2.5i, Z4 3.0 (M54 engine)

Show More Show Less

ECS Billet Cylinder Head Outlet Hose Adapter - BMW N52 N54 N55 3.0L N...

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

T#:556105

Part#: 024797ECS01

In Stock

Sale - Save 25% $ 76.99

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

$ 57.74 USD

Add to Wish List

Qty

Sale - Save 25%

$ 76.99

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

$ 57.74 USD

Add to Wish List

Some of the biggest issues when owning a BMW can come from cooling system components. Even through years of improvement, the same failure is seen with the plastic fittings and adapters from years of hot to cold temperature fluctuation. The N52/N54/N55/N20 engine sees failure at the plastic cylinder head outlet adapter connecting the cylinder head to the thermostat hose. The stock plastic adapter simply shears off at the end of the barbed fitting, creating a massive coolant leak. The engineering team at ECS Tuning decided a billet aluminum piece was a much better option to contend with the temperature fluctuation. Since other offerings on the market want you to modify your OE hose to be reused, they even developed a silicone replacement hose. These 2 pieces can be purchased separately if you decide to reuse your existing OE hose or in a package kit together for a single click upgrade. Features: Manufactured from billet 6061-T6 with type III anodized for exceptional durability and corrosion resistance. Much stronger part than OEM plastic Will not become brittle and fatigued over time due to thermal cycling. This will prevent the part from breaking during removal and re-installation. Follows OEM form for perfect fitment. Utilizes (and includes) OEM O-ring 11537545278 to ensure a proper seal. Recommended clamp size is 25-40mm

Show More Show Less

ECS Aluminized Silicone Water Pump Hose V2.0 - - E9x E8x E6x N52 N54...

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

T#:640062

Part#: 008286LA01

In Stock

Sale - Save 25% $ 106.99

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

$ 80.24 USD

Add to Wish List

Qty

Sale - Save 25%

$ 106.99

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

$ 80.24 USD

Add to Wish List

When it comes to cooling system hose replacement, the "U" shaped hose connecting the water pump to the thermostat is usually the first to fail. A lot of this comes from its close proximity to the hot downpipes, while some of this failure comes from the sharp bends in the hose.

Why not upgrade when you're due for a replacement? The ECS Tuning silicone hose replacement fixes these issue with two key features in their design. Offering this hose in a much more heat resistant silicone instead of OE rubber and having the hose wrapped in aluminum. The aluminum coating acts as a heat shield to further protect the silicone as well as reducing the temperatures forced on the coolant running through the hose.

Replaces OE hose #11537545665

Show More Show Less

Aluminized Silicone Water Pump Hose - with clamps

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

T#:568837

Part#: 020414ECS01KT

In Stock

Sale - Save 25% $ 113.99

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

$ 85.49 USD

Add to Wish List

Qty

Sale - Save 25%

$ 113.99

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

$ 85.49 USD

Add to Wish List

Select Vehicle

Purpose

Brand

View All Brands

Price

Special Offers

On Sale (5)

Project Cars

SELECT YOUR BMW

BMW Thermostats for BMW Z Series E85/6 (2003-2008)

Water Pump And Thermostat Kit - BMW N52 3.0L

Water Pump And Thermostat Kit

Thermostat Replacement Kit - E39 E46 E60 E53 Z3 Z4 With M54, M52TU En...

ECS Billet Cylinder Head Outlet Hose Adapter - BMW N52 N54 N55 3.0L N...

ECS Aluminized Silicone Water Pump Hose V2.0 - - E9x E8x E6x N52 N54...

Aluminized Silicone Water Pump Hose - with clamps

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results