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008363LA02EB1KT - Heavy-Duty Expansion Tank With Mechanical Thermostat Conversion Kit & Silicone Radiator Hoses - M52TU/M54

Heavy-Duty Expansion Tank With Mechanical Thermostat Conversion Kit & Silicone Radiator Hoses - M52TU/M54

Take your BMW’s cooling system to the next level with this Turner Motorsport Cooling Upgrade Kit. Featuring a Heavy-Duty Aluminum Expansion Tank and a Mechanical Thermostat Conversion Kit, this combo is engineered to deliver ultimate reliability and superior performance for M52TU/M54 engines. Say goodbye to the cooling system failures common in stock setups—Turner Motorsport has you covered.

Turner Motorsport M52TU/M54 Heavy-Duty Expansion Tank Kit

The Turner Motorsport Aluminum Expansion Tank is a premium upgrade designed to replace the fragile factory plastic tank, which is known to crack, leak, or even explode. Crafted for durability, this tank’s all-aluminum construction with wrinkle black powder coating ensures this is the last expansion tank you’ll ever need.

Why Upgrade? The factory plastic tanks on BMW M52TU/M54 engines are notorious for failure under heat and pressure. Avoid the risk of being stranded on the side of the road with a mess of coolant—Turner Motorsport’s aluminum expansion tank is built to withstand years of demanding use and intense heat cycles.

Key Features and Benefits:

Complete Kit: Includes Turner Aluminum Expansion Tank, coolant level sensor, expansion tank cap, and flared coolant pressure release line. OEM Fit & Capacity: Direct fit with no modifications, maintains stock coolant capacity and expansion volume. Baffled Design: Prevents air pockets during aggressive driving and ensures accurate coolant level readings. Premium Construction: TIG-welded 5052 aluminum with machined fittings for factory hose compatibility. Turner Motorsport M52TU/M54 Mechanical Thermostat Conversion Kit

Replace your problematic factory plastic thermostat housing with Turner Motorsport’s high-quality billet aluminum Thermostat Conversion Kit. This upgrade not only provides increased reliability but also allows for thermostat swaps to suit specific temperature requirements, making it ideal for daily drivers and track cars alike.

Why Make the Switch? The factory plastic thermostat housing with its built-in thermostat is prone to cracking and requires the whole unit to be replaced during maintenance. Turner’s conversion kit changes the game by providing a durable billet housing with a replaceable thermostat for flexibility and lower maintenance costs.

Key Features and Benefits:

Increased Reliability: Uses an M50/S50 mechanical thermostat, including an 80°C thermostat for enhanced cooling control. Customizable: Includes barbed hose connections for standard E46 M3 hoses and -16 ORB connections for custom hoses. Engineered to Last: CNC-machined from billet 6061 aluminum and black anodized for corrosion resistance. Enhanced Sealing: Features a Viton gasket for superior durability and sealing performance. Kit Includes:

6061 Billet Aluminum Thermostat Housing 80°C Mechanical Thermostat Thermostat Housing Gasket Thermostat Harness ECS Silicone E46 M3 Cooling Hoses Turner Motorsport Precision Engineering & Product Development

Every component in this cooling upgrade kit has been rigorously designed, engineered, and tested by Turner Motorsport’s Research and Development team. Using state-of-the-art technology such as FARO laser scanning, SolidWorks 3D modeling, and in-house rapid prototyping, Turner ensures that these products meet the highest standards of quality, precision, and durability.

Upgrade your BMW with confidence—Turner Motorsport is your partner in performance and reliability.

Enthusiast Bundles

T#: 37419798 | Part#: 008363LA02EB1KT

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

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SALE: $799.04 (24% OFF)

WAS: $1055.95 on 05-05-2026

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

Lifetime Replacement

Availability:

On Order

Est. Ship Date:

on Jul 21, 2026

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Product Details

Turner Motorsport M52TU/M54 Heavy-Duty Expansion Tank Kit

Why Upgrade?
The factory plastic tanks on BMW M52TU/M54 engines are notorious for failure under heat and pressure. Avoid the risk of being stranded on the side of the road with a mess of coolant—Turner Motorsport’s aluminum expansion tank is built to withstand years of demanding use and intense heat cycles.

Key Features and Benefits:

Complete Kit: Includes Turner Aluminum Expansion Tank, coolant level sensor, expansion tank cap, and flared coolant pressure release line.
OEM Fit & Capacity: Direct fit with no modifications, maintains stock coolant capacity and expansion volume.
Baffled Design: Prevents air pockets during aggressive driving and ensures accurate coolant level readings.
Premium Construction: TIG-welded 5052 aluminum with machined fittings for factory hose compatibility.

Turner Motorsport M52TU/M54 Mechanical Thermostat Conversion Kit

Why Make the Switch?
The factory plastic thermostat housing with its built-in thermostat is prone to cracking and requires the whole unit to be replaced during maintenance. Turner’s conversion kit changes the game by providing a durable billet housing with a replaceable thermostat for flexibility and lower maintenance costs.

Key Features and Benefits:

Increased Reliability: Uses an M50/S50 mechanical thermostat, including an 80°C thermostat for enhanced cooling control.
Customizable: Includes barbed hose connections for standard E46 M3 hoses and -16 ORB connections for custom hoses.
Engineered to Last: CNC-machined from billet 6061 aluminum and black anodized for corrosion resistance.
Enhanced Sealing: Features a Viton gasket for superior durability and sealing performance.

Kit Includes:

6061 Billet Aluminum Thermostat Housing
80°C Mechanical Thermostat
Thermostat Housing Gasket
Thermostat Harness
ECS Silicone E46 M3 Cooling Hoses

Turner Motorsport Precision Engineering & Product Development

Upgrade your BMW with confidence—Turner Motorsport is your partner in performance and reliability.

Prop 65 Warning

Cross Reference

17127510952
11531436408
17117573781
11537509227

Kit Contents

Qty	Description	T#	Part#	Lifetime
1	Vemo Thermostat - 80C - E30, E32, E34	T#362942	11531713040~VMO	YES
1	ECS Tuning Aluminum Coolant Bleeder Screw	T#363070	003530ECS01A	YES
1	ECS E46 M3 Silicone Radiator Hose Kit	T#378149	003631ECS01~A	YES
1	Thermostat Housing	T#16873860	008785LA01~B	YES
1	Thermostat Housing Gasket	T#16873861	008785LA02~B	YES
1	Thermostat Harness	T#17040300	008785LA04~A	YES
1	M52/M54 Heavy Duty Expansion Tank Kit - E46, E53, E83	T#18003818	008363LA02~A	YES

Product Q&A

Lifetime Replacement

This Product Is Covered By Our Lifetime Replacement Program

Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

Fits These Cars

MAKE	MODEL	SUBMODEL	ENGINE	Special Fitment Notes
BMW	E46	323Ci	M52 2.5L	Use vehicle selector to confirm fitment
BMW	E46	323i	M52 2.5L	Use vehicle selector to confirm fitment
BMW	E46	325Ci	M54 2.5L	Use vehicle selector to confirm fitment
BMW	E46	325i	M54 2.5L	Use vehicle selector to confirm fitment
BMW	E46	325xi	M54 2.5L	Use vehicle selector to confirm fitment
BMW	E46	328Ci	M52 2.8L	Use vehicle selector to confirm fitment
BMW	E46	328i	M52 2.8L	Use vehicle selector to confirm fitment
BMW	E46	330Ci	M54 3.0L	Use vehicle selector to confirm fitment
BMW	E46	330i	M54 3.0L	Use vehicle selector to confirm fitment
BMW	E46	330xi	M54 3.0L	Use vehicle selector to confirm fitment
BMW	E53	X5	M54 3.0L	Use vehicle selector to confirm fitment
BMW	E83	X3	M54 2.5L	Use vehicle selector to confirm fitment
BMW	E83	X3	M54 3.0L	Use vehicle selector to confirm fitment

*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.