HomeBelts and Cooling > Thermostat and HousingFacet 7.8254S Engine Coolant Thermostat
Part #: 7.8254S

Facet 7.8254S Engine Coolant Thermostat

⚙️ 50 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, 325e, 325es, 325i, 325is, 325iX, 525i, 528e, 535i, 535is, 635CSi, 735i, and 735iL
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Reliable Engine Coolant Thermostat for BMW Models

The Facet 7.8254S engine coolant thermostat is designed to maintain optimal engine temperature for various BMW vehicles. This thermostat ensures efficient cooling system performance, helping to protect your engine from overheating or running too cold.

  • Compatible with BMW 3 Series, 5 Series, 6 Series, and 7 Series models
  • Engine coolant thermostat designed for precise temperature regulation
  • Part number 7.8254S for accurate identification and fitment
  • Durable construction to withstand engine operating conditions
  • Direct replacement for factory-installed thermostats

Product Details and Compatibility

The Facet 7.8254S engine coolant thermostat is engineered to fit a range of BMW vehicles including the 325e, 325es, 325i, 325is, 325iX, 525i, 528e, 535i, 535is, 635CSi, 735i, and 735iL models. This thermostat plays a critical role in regulating the flow of coolant through the engine, ensuring the engine reaches and maintains the correct operating temperature. Using the correct thermostat like the Facet 7.8254S helps maintain engine efficiency and prevents damage caused by temperature extremes.

Common Applications and Problem Resolution

  • Prevents engine overheating by regulating coolant flow
  • Helps avoid poor fuel economy caused by incorrect engine temperature
  • Reduces engine wear due to improper temperature control
  • Eliminates issues with heater core performance in BMW 3, 5, 6, and 7 Series vehicles
  • Resolves engine temperature fluctuations and related warning lights

Installation Notes and Tips

When installing the Facet 7.8254S thermostat, ensure the engine is cool before beginning work. Drain the coolant system to prevent spills and contamination. Remove the old thermostat housing carefully and clean the mounting surface before installing the new thermostat. Verify the orientation of the thermostat for proper operation. After installation, refill the cooling system and bleed any trapped air to avoid overheating issues.

Quality Assurance and Warranty

Facet manufactures the 7.8254S thermostat to meet OEM specifications for fit and function. While specific warranty details are not provided, Facet products typically undergo quality control testing to ensure durability and reliable performance in BMW vehicles. Using a genuine Facet thermostat helps maintain the integrity of your vehicle’s cooling system.

This part fits 50 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
1993BMW325iBase2.5LL6N/A80 Degrees C; Gasket included: N
1993BMW535iBaseN/A80 Degrees C; Gasket included: N
1992BMW325iBase2.5LL6N/A80 Degrees C; Gasket included: N
1992BMW535iBaseN/A80 Degrees C; Gasket included: N
1992BMW735iBaseN/A80 Degrees C; Gasket included: N
1992BMW735iLBaseN/A80 Degrees C; Gasket included: N
1991BMW325iBaseN/A80 Degrees C; Gasket included: N
1991BMW325isBaseN/A80 Degrees C; Gasket included: N
1991BMW325iXBaseN/A80 Degrees C; Gasket included: N
1991BMW535iBaseN/A80 Degrees C; Gasket included: N
1991BMW735iBaseN/A80 Degrees C; Gasket included: N
1991BMW735iLBaseN/A80 Degrees C; Gasket included: N
1990BMW325iBaseN/A80 Degrees C; Gasket included: N
1990BMW325isBaseN/A80 Degrees C; Gasket included: N
1990BMW325iXBaseN/A80 Degrees C; Gasket included: N
1990BMW525iBaseN/A80 Degrees C; Gasket included: N
1990BMW535iBaseN/A80 Degrees C; Gasket included: N
1990BMW735iBaseN/A80 Degrees C; Gasket included: N
1990BMW735iLBaseN/A80 Degrees C; Gasket included: N
1989BMW325iBaseN/A80 Degrees C; Gasket included: N
1989BMW325isBaseN/A80 Degrees C; Gasket included: N
1989BMW325iXBaseN/A80 Degrees C; Gasket included: N
1989BMW525iBaseN/A80 Degrees C; Gasket included: N
1989BMW535iBaseN/A80 Degrees C; Gasket included: N
1989BMW635CSiBaseN/A80 Degrees C; Gasket included: N
1989BMW735iBaseN/A80 Degrees C; Gasket included: N
1989BMW735iLBaseN/A80 Degrees C; Gasket included: N
1988BMW325iBaseN/A80 Degrees C; Gasket included: N
1988BMW325isBaseN/A80 Degrees C; Gasket included: N
1988BMW325iXBaseN/A80 Degrees C; Gasket included: N
1988BMW528eBaseN/A80 Degrees C; Gasket included: N
1988BMW535iBaseN/A80 Degrees C; Gasket included: N
1988BMW535isBaseN/A80 Degrees C; Gasket included: N
1988BMW635CSiBaseN/A80 Degrees C; Gasket included: N
1988BMW735iBaseN/A80 Degrees C; Gasket included: N
1988BMW735iLBaseN/A80 Degrees C; Gasket included: N
1987BMW325eBaseN/A80 Degrees C; Gasket included: N
1987BMW325esBaseN/A80 Degrees C; Gasket included: N
1987BMW325iBaseN/A80 Degrees C; Gasket included: N
1987BMW325isBaseN/A80 Degrees C; Gasket included: N
1987BMW528eBaseN/A80 Degrees C; Gasket included: N
1987BMW535iBaseN/A80 Degrees C; Gasket included: N
1987BMW635CSiBaseN/A80 Degrees C; Gasket included: N
1987BMW735iBaseN/A80 Degrees C; Gasket included: N
1986BMW325eBaseN/A80 Degrees C; Gasket included: N
1986BMW325esBaseN/A80 Degrees C; Gasket included: N
1986BMW528eBaseN/A80 Degrees C; Gasket included: N
1986BMW535iBaseN/A80 Degrees C; Gasket included: N
1986BMW635CSiBaseN/A80 Degrees C; Gasket included: N
1986BMW735iBaseN/A80 Degrees C; Gasket included: N

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