HomeBelts and Cooling > Thermostat and HousingFour Seasons 86258 Engine Coolant Thermostat Housing
Part #: 86258

Four Seasons 86258 Engine Coolant Thermostat Housing

Thermostat Housing
⚙️ 7 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Thermostat Housing
🚗Fitment: BMW, X3 and X6
🔄Easy Returns — Return within 60 days for a full refund
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Overview of Four Seasons Thermostat Housing 86258

The Four Seasons Thermostat Housing 86258 is designed specifically for BMW X3 and X6 models, providing reliable engine coolant management. This integrated thermostat housing includes the thermostat and is constructed from durable plastic to ensure consistent performance.

  • Material: High-quality plastic construction
  • Includes integrated thermostat
  • Compatible with BMW X3 and X6 models
  • Bolt hole center to center measurement: 0.91 inches
  • Inlet port diameter: 1.51 inches
  • Overall height: 5.71 inches
  • Gasket or seal not included
  • Meets or exceeds OEM specifications

Details on Four Seasons Thermostat Housing Product Line

The Four Seasons Thermostat Housing product line focuses on engine coolant components designed to meet or exceed original equipment manufacturer standards. This line integrates the thermostat within the housing to simplify installation and improve coolant flow management. The 86258 model is part of this line, offering a precise fit and reliable operation for BMW vehicles.

Product Description and Specifications

This engine coolant thermostat housing is made from durable plastic, providing resistance to corrosion and heat. The integrated thermostat ensures proper temperature regulation within the cooling system. With a bolt hole center-to-center distance of 0.91 inches and an inlet port diameter of 1.51 inches, this housing fits securely on compatible BMW X3 and X6 engines. The overall height of 5.71 inches allows for proper clearance and installation. Note that the gasket or seal is not included and should be sourced separately.

Common Applications and Issues Addressed

  • Replacement for faulty or leaking thermostat housings on BMW X3 and X6
  • Resolves engine overheating due to thermostat failure
  • Prevents coolant leaks caused by cracked or damaged housings
  • Restores proper coolant flow and engine temperature regulation
  • Addresses issues related to thermostat sticking or malfunction

Installation Notes and Tips

Ensure the engine is cool before beginning installation. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly before installing the new housing. Since the gasket or seal is not included, use a compatible gasket to ensure a proper seal. Torque bolts to manufacturer specifications to prevent leaks and ensure secure fitment.

Quality Assurance and Warranty

The Four Seasons Thermostat Housing 86258 meets or exceeds OEM standards for fit, form, and function. Manufactured with quality materials, it is designed to provide reliable service life. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty against defects in material and workmanship.

BrandFour Seasons
Part Number86258
PositionThermostat Housing
Bolt Hole Center To Bolt Hole Center0.91
DescriptionEngine Coolant Components
Gasket Or Seal IncludedNot Included
Inlet Port Diameter1.51
MaterialPlastic
Meets / Exceeds OEM?Yes
Overall Height IN5.71
Stylew/ Thermostat
Thermostat Included?Included
TypeIntegrated Thermostat Housing

This part fits 7 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2012BMWX33.0LL6N/AThermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit.; Thermostat Housing
2012BMWX3xDrive28i3.0LL6N/AThermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit.; Thermostat Housing
2012BMWX63.0LL6N/AThermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit.; Thermostat Housing
2011BMWX33.0LL6N/AThermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit.; Thermostat Housing
2011BMWX3xDrive28i3.0LL6N/AThermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit.; Thermostat Housing
2011BMWX63.0LL6N/AThermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit.; Thermostat Housing
2010BMWX3xDrive28iN/AThermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit.; Thermostat Housing

* 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:

11537586783817088862589025161955207W98788

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