HomeBelts and Cooling > Gaskets and Sealing SystemsFel-Pro 35717 Engine Coolant Thermostat O-Ring
Part #: 35717

Fel-Pro 35717 Engine Coolant Thermostat O-Ring

⚙️ 37 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$9.27Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Lotus, Pontiac, Toyota, Ford, and Mercury, Elise, Exige, Vibe, Corolla, Matrix, Celica, Focus, Escort, Cougar, Contour, and Mystique
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Engine Coolant Thermostat O-Ring for Ford, Mercury, Pontiac, and Toyota

The Fel-Pro 35717 Engine Coolant Thermostat O-Ring is designed to provide a secure seal in your vehicle's cooling system. Engineered as a premium-grade O-ring, it ensures proper thermostat function and prevents coolant leaks in select Ford, Mercury, Pontiac, and Toyota models.

Key Features of Fel-Pro 35717 Thermostat O-Ring

  • Premium grade material for durability and heat resistance
  • Precise fit for Ford, Mercury, Pontiac, and Toyota vehicles
  • Compatible with models including Celica, Contour, Corolla, Cougar, Escort, Focus, Matrix, Mystique, and Vibe
  • Designed to maintain a tight seal around the engine coolant thermostat
  • Part number 35717 ensures correct replacement and fitment

Detailed Product Description

This Fel-Pro Engine Coolant Thermostat O-Ring (part number 35717) is manufactured to meet OEM specifications, providing a reliable seal for the thermostat housing. The premium grade material withstands high temperatures and exposure to engine coolant, reducing the risk of leaks and maintaining optimal engine temperature regulation. This O-ring is compatible with a range of vehicles including the Ford Contour and Focus, Mercury Mystique, Pontiac Vibe and Cougar, as well as Toyota Celica, Corolla, Escort, and Matrix models. Proper sealing of the thermostat housing is critical to prevent coolant loss and ensure efficient engine operation.

Common Applications and Issues Addressed

  • Prevents coolant leaks around the thermostat housing
  • Eliminates overheating caused by faulty thermostat seals
  • Reduces risk of engine damage due to coolant loss
  • Maintains proper engine temperature regulation
  • Replaces worn or damaged thermostat O-rings in specified vehicles

Installation Notes and Tips

  • Ensure the thermostat housing surface is clean and free of debris before installation
  • Lubricate the O-ring lightly with engine coolant or appropriate lubricant to ease installation
  • Verify correct orientation and seating of the O-ring to avoid leaks
  • Use the Fel-Pro 35717 part number to confirm compatibility with your vehicle model

Quality Assurance and Warranty

Fel-Pro manufactures this thermostat O-ring to meet stringent quality standards, ensuring durability and reliable performance. The premium grade material is tested for heat and chemical resistance to withstand engine operating conditions. While specific warranty details may vary, Fel-Pro products typically come with a limited warranty against defects in material and workmanship.

This part fits 37 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2006PontiacVibe1.8LL4N/A
2006ToyotaCorolla1.8LL4N/A
2006ToyotaMatrix1.8LL4N/A
2005PontiacVibe1.8LL4N/A
2005ToyotaCelica1.8LL4N/A
2005ToyotaCorolla1.8LL4N/A
2005ToyotaMatrix1.8LL4N/A
2004FordFocus2.0LL4N/A
2004PontiacVibe1.8LL4N/A
2004ToyotaCelica1.8LL4N/A
2004ToyotaMatrix1.8LL4N/A
2003FordEscort2.0LL4N/A
2003FordFocus2.0LL4N/A
2003PontiacVibe1.8LL4N/A
2003ToyotaCelica1.8LL4N/A
2003ToyotaMatrix1.8LL4N/A
2002FordEscort2.0LL4N/A
2002FordFocus2.0LL4N/A
2002MercuryCougar2.0LL4N/A
2002ToyotaCelica1.8LL4N/A
2001FordEscort2.0LL4N/A
2001FordFocus2.0LL4N/A
2001MercuryCougar2.0LL4N/A
2001ToyotaCelica1.8LL4N/A
2000FordContour2.0LL4N/A
2000FordEscort2.0LL4N/A
2000FordFocus2.0LL4N/A
2000MercuryCougar2.0LL4N/A
2000MercuryMystique2.0LL4N/A
2000ToyotaCelica1.8LL4N/A
1999FordContour2.0LL4N/A
1999FordEscort2.0LL4N/A
1999MercuryCougar2.0LL4N/A
1999MercuryMystique2.0LL4N/A
1998FordContour2.0LL4N/A
1998FordEscort2.0LL4N/A
1998MercuryMystique2.0LL4N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1236018896959589202039030169007K31714W702259S300WP9726

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.