Engine Coolant Thermostat and Housing Assembly

Aluminum Housing with Integrated Temperature Sensor

Maintain your engine's thermal efficiency and prevent overheating with this Premium Aluminum Thermostat Housing Assembly. Unlike standard plastic housings that are prone to warping and cracking over time, this unit is constructed from high-grade aluminum for superior durability and heat resistance. It is engineered as a complete solution, featuring a pre-installed 212°F (100°C) thermostat, a new sealing gasket, and a calibrated temperature sensor to ensure accurate data is sent to your vehicle's Engine Control Unit (ECU).

A malfunctioning thermostat can cause the "Check Engine" light to illuminate, trigger poor fuel economy, or lead to catastrophic engine damage. This direct-fit assembly replaces the entire high-wear cooling manifold, restoring the factory-specified operating temperature and ensuring a leak-free seal for your cooling system.

Fitment Verification and Vehicle Applications

This assembly is designed for Mercedes-Benz and Dodge platforms equipped with specific V6 and V8 engines:

• Mercedes-Benz (V8 Models):

  • S550 / CL550: 2007, 2008, 2009, 2010, 2011.

  • E550 / ML550: 2008, 2009, 2010, 2011.

  • GL450 / GL550: 2007, 2008, 2009, 2010, 2011, 2012.

  • SL550: 2007, 2008, 2009, 2010, 2011, 2012.

  • G550: 2009, 2010, 2011, 2012, 2013, 2014, 2015.

  • S450: 2008, 2009, 2010, 2011.

• Dodge (V6 3.5L):

  • Sprinter 2500 / 3500: 2007, 2008.

Fitment Note: This unit features a high-temperature 100°C (212°F) opening threshold. Please verify that your specific engine variant requires this high-heat specification, as some early models or different regional climates may utilize an 80°C or 90°C variant.

Technical Specifications and Attributes

• Material: Heavy-Duty Aluminum (Upgrade from factory plastic).

• Opening Temperature: 100°C (212°F).

• Sensor Included: Yes (Integrated Temperature Sensor).

• Gasket Included: Yes (High-Temp Sealing O-Ring).

• Housing Style: Complete Bolt-on Assembly.

• Grade Type: Standard Replacement / Performance Upgrade.

What’s in the Box

• (1) Aluminum Thermostat Housing

• (1) Engine Coolant Thermostat (Pre-installed)

• (1) Coolant Temperature Sensor (Pre-installed)

• (1) Sealing Gasket

Industry Cross-Reference Numbers

• Mercedes-Benz / Dodge: 2732000215, A2732000215

• Dorman / OE Solutions: 902-5903

• DIY Solutions: HVA00861

• Mahle: TM25100

• Febi Bilstein: 45155

Installation and Technical Tips

• Cold Engine Service: Ensure the engine is completely cool before beginning the repair. Cooling systems are pressurized and hot coolant can cause severe injury.

• Aluminum vs. Plastic: When installing this aluminum housing, ensure the mounting surface on the engine block is perfectly clean. Use a plastic scraper to remove any residual gasket material or corrosion to prevent leaks.

• Electrical Connector Integrity: Check the pins on the vehicle's wiring harness for any signs of corrosion or "coolant wicking" from a previously leaking sensor. Use electrical contact cleaner if necessary to ensure a solid signal to the ECU.

• Proper Coolant Refill: After installation, use only the manufacturer-recommended coolant (typically Zerex G05 or Mercedes-specific blue/violet). Bleeding air from these V8 and V6 engines is critical; use a vacuum refill tool or follow the factory-specified bleeding procedure to avoid air pockets that can cause localized overheating.