Mahle C31090 Engine Coolant Thermostat Housing O-Ring

Engine Coolant Thermostat Housing O-Ring Seal

MAHLE C31090 is an engine coolant thermostat housing O-ring made for sealing the thermostat housing in a wide range of Toyota, Lexus, Nissan, and related applications. It is a molded rubber O-ring type seal built for direct replacement service where coolant sealing integrity matters.

Key Features

• Engine coolant thermostat housing O-ring seal
• Molded rubber, O-ring type construction
• MAHLE sealing product line used by OEMs and technicians
• Direct-fit replacement for many Asian vehicle applications
• Part number C31090 for easy identification

Detailed Description

MAHLE C31090 is a thermostat housing O-ring designed for vehicles that use a molded rubber seal at the coolant thermostat housing. It is compatible with a broad range of applications including Toyota Camry, Corolla, RAV4, Sienna, Tacoma, Prius, and Lexus RX350, ES350, and ES300h models, along with select Nissan and Scion vehicles. This part cross-references FEL-PRO 35445 for the same application. Use C31090 when replacing a worn, flattened, or leaking thermostat housing seal and restoring a proper coolant seal at the housing interface.

What It Helps Address

• Coolant seepage at the thermostat housing
• Sealing issues after thermostat service
• Rubber seal hardening from heat cycling
• Leak paths caused by a flattened or damaged O-ring
• Maintenance on Toyota, Lexus, Nissan, Scion, and related platforms

Installation Notes and Tips

Clean the thermostat housing and mating surface before installation. Inspect the groove for debris, corrosion, or old seal material, and verify the replacement seal matches the molded rubber O-ring style used by the vehicle. Confirm fitment by year, make, and model before service. Fits 1988-2016 Toyota Camry, N/A; Fits 1998-2016 Toyota Corolla, N/A; Fits 2007-2016 Lexus RX350, N/A; Fits 2007-2014 Nissan Altima, N/A.

Quality Assurance

MAHLE gaskets are engineered as sealing products trusted by OEMs and technicians around the globe. C31090 is built to support reliable coolant sealing performance in the specified applications.