Fel-Pro 35776 Engine Coolant Thermostat Seal

Fel-Pro 35776 Engine Coolant Thermostat Seal

Fel-Pro 35776 is a premium engine coolant thermostat seal built for vehicle-specific sealing performance. It uses application-specific materials to help maintain a reliable coolant seal in service, making it a practical choice for Mazda 3, Mazda 6, Ford Focus, and other listed applications.

Key Features

• Premium-grade thermostat seal for cooling system service
• Application-specific material selection for a precise seal
• Supports 100% vehicle sealing when installed on the correct application
• Direct replacement style for common Ford and Mazda cooling system repairs
• Fel-Pro 35776 is cross-referenced with MAHLE C31855 for the same application

Detailed Description

This Fel-Pro thermostat seal is engineered for vehicles that require a dependable coolant-side seal at the thermostat housing. It is a fitment-based part for a wide range of Ford and Mazda models, including Mazda 3, Mazda 6, Mazda MX-5 Miata, Ford Focus, and Ford Ranger applications. If you are servicing a cooling system leak or replacing a thermostat seal during maintenance, Fel-Pro 35776 provides the sealing material and application match needed for a proper repair.

Compatible With 2004-2013 Mazda 3, 2003-2014 Mazda 6, 2006-2015 Mazda MX-5 Miata, 2003-2011 Ford Focus, and 2001-2011 Ford Ranger applications, this seal is also used across additional Mazda and Ford platforms listed in the fitment data. The Fel-Pro 35776 part number is a useful reference when searching for an engine coolant thermostat seal for these vehicles.

What It Helps Fix

• Coolant seepage at the thermostat housing
• Leaks caused by a worn or flattened thermostat seal
• Cooling system service issues after thermostat replacement
• Loss of sealing integrity from age, heat, and coolant exposure
• Fitment problems when the wrong seal material or profile is used

Installation Notes and Tips

Confirm the thermostat seal matches the exact engine application before installation. Clean the sealing surfaces thoroughly, remove old gasket residue, and inspect the thermostat housing for corrosion or damage. Use the seal only on the listed vehicle applications, including Mazda 5, Mazda CX-7, Mazda Tribute, Mercury Mariner, Ford Fusion, and Mercury Milan where specified in the fitment data. The part number 35776 should be verified against the vehicle’s cooling system configuration before assembly.

Quality Assurance

Fel-Pro is known for vehicle-specific sealing solutions and application-focused materials used in professional engine repair. This thermostat seal is a premium-grade sealing component designed to support dependable cooling system service on the listed Ford and Mazda applications.