Fel-Pro 35879 Engine Coolant Thermostat O-Ring - Outer

Fel-Pro Thermostat O-Ring Seal

Fel-Pro 35879 is a premium engine coolant thermostat O-ring built for dependable sealing in the cooling system. It uses application-specific materials to help maintain 100% vehicle sealing performance where the thermostat housing requires an outer O-ring seal.

Compatible with select Volkswagen Beetle, Golf, Jetta, and Passat applications, this thermostat O-ring supports precise sealing for service work on the cooling system. Fel-Pro 35879 is a practical choice when replacing a worn or flattened thermostat seal during thermostat or housing service.

Key Features

• Premium-grade engine coolant thermostat O-ring
• Application-specific sealing material for the intended cooling system use
• Engineered for outer thermostat seal applications
• Direct replacement for select Volkswagen cooling system service
• Fel-Pro part number 35879 for easy identification

Detailed Description

Fel-Pro 35879 is an engine coolant thermostat O-ring designed for sealing the thermostat housing in select Volkswagen cooling system applications. Fel-Pro focuses on vehicle-specific sealing solutions, and this premium O-ring is built to deliver the sealing performance professionals expect during thermostat replacement or cooling system repair. This part cross-references MAHLE C32262 and C32294 for the same application.

Vehicle coverage includes Fits 2006-2010 Volkswagen Beetle, Outer; Fits 2012-2014 Volkswagen Beetle, Outer; Fits 2010-2014 Volkswagen Golf, Outer; Fits 2005-2014 Volkswagen Jetta, Outer; and Fits 2012-2014 Volkswagen Passat, Outer. The Fel-Pro 35879 thermostat O-ring is also listed for N/A positions in the same model ranges, so verify the exact housing configuration before installation.

What It Helps Address

• Coolant seepage at the thermostat housing seal
• Leak paths caused by a flattened or aged O-ring
• Cooling system service issues after thermostat replacement
• Seal mismatch during Volkswagen Beetle, Golf, Jetta, or Passat cooling repairs

Installation Notes and Tips

Inspect the thermostat housing and sealing groove before installation. Clean all mating surfaces, remove old seal residue, and confirm the outer seal position matches the vehicle application. For best results, compare the removed seal to Fel-Pro 35879 and verify fitment by year, model, and housing position before reassembly.

Quality Assurance

Fel-Pro gaskets and seals are built around application-specific materials and vehicle-focused sealing design. That approach supports consistent sealing performance in cooling system service on Volkswagen Beetle, Golf, Jetta, and Passat applications.