050 121 113C – Thermostat (Facet)

Description

The 050121113C Coolant Thermostat by Facet regulates the flow of engine coolant to maintain optimal thermal management. When the engine is cold, the valve remains closed to accelerate warm-up and reduce emissions. Upon reaching approximately 87°C, the thermostat opens smoothly to circulate fluid through the radiator. Consequently, it maintains consistent engine operating temperatures under diverse driving conditions.

Facet is a premier European manufacturer specializing in precision thermal management and engine management components. Therefore, this direct-fit thermostat assembly includes the required sealing O-ring for a leak-free and straightforward installation.

Why the 050121113C Coolant Thermostat Matters

Accurate thermal regulation is critical for fuel efficiency, cylinder lubrication, and overall engine longevity. Over extended mileage, thermal fatigue and mineral deposits can cause the internal wax pellet mechanism to bind. Consequently, an aged thermostat may permanently seize in either the open or closed position.

A thermostat stuck closed rapidly overheats the cylinder head, risking warped metal and blown head gaskets. Conversely, a unit stuck open prevents the engine from reaching closed-loop operating temperature, causing poor fuel economy and weak cabin heat. Installing a replacement 050121113C Coolant Thermostat restores precise temperature control and protects critical internal engine components.

Signs of Thermostat Failure

Inspect your cooling system for these common warning signs indicating a failing thermostat:

• Rapid engine overheating or an elevated reading on the instrument cluster temperature gauge.

• Little to no warm airflow emerging from the cabin heater vents during cold weather.

• The engine takes an unusually long time to reach normal operating temperature.

• Operating temperatures that fluctuate erratically between highway driving and city idling.

• Fresh coolant leaks or crusty residue visible around the thermostat housing flange.

• An illuminated check engine light triggered by coolant temperature circuit or rational failure codes.

Key Features of the 050121113C Coolant Thermostat

• OE Part Number: 050 121 113 C

• Manufacturer: Facet

• Opening Temperature: 87°C factory-calibrated opening threshold.

• Function: Regulates coolant distribution between the engine block and radiator.

• Hardware Included: Comes complete with the application-matched sealing O-ring.

• Fitment: Direct-fit OEM replacement engineered to factory mechanical specifications.

• Durability: Manufactured with corrosion-resistant brass and stainless steel components.

Service Notes

Always verify fitment by VIN before ordering. Never service the cooling system while the engine is hot, as pressurized coolant can cause severe burn injuries.

Compatibility

Always verify fitment by VIN before ordering. Compatibility depends on engine code, cooling system configuration, platform generation, and the original thermostat revision.

Cross Reference

• 050 121 113 C

• 050121113C

• 7.8286 (Facet)

Additional information