Stant 15309 Engine Coolant Thermostat / Water Outlet Assembly
OE Quality 60-Day Returns
Stant
 Integrated Thermostat Housing

Stant 15309 Engine Coolant Thermostat / Water Outlet Assembly

Brand Stant 15309
Bypass Plate Diameter (in) 1.4
Flange Diameter (With Seal) (in) 1.5
Flange Diameter (Without Seal) (in) 1.14
Freight Class 70
Height from Flange to Bottom (in) 1
Temperature (F) 190 degrees
Product line Integrated Thermostat Housing
Fits BMW · 8 vehicles

Integrated design. Thermostat and housing are combined to simplify cooling system service.

190-degree rating. Matches the listed temperature specification for the application.

Durable housing. Built from material selected for long service life.

$68.50Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $68.50
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Engine Coolant Thermostat / Water Outlet Assembly options

Integrated Thermostat Housing

The Stant 15309 is an engine coolant thermostat and water outlet assembly built with the thermostat integrated into the housing. That design simplifies replacement and reduces the number of separate components to manage during service. It is a direct fit for select BMW cooling system applications.

Key Features

  • Integrated thermostat housing assembly for streamlined service
  • Durable housing material for long service life
  • 190-degree thermostat specification
  • Bypass plate diameter: 1.4 in.
  • Flange diameter with seal: 1.5 in.; without seal: 1.14 in.

Detailed Description

This Stant integrated thermostat housing combines the thermostat and water outlet housing into one assembly, which helps reduce assembly complexity during cooling system repair. The 190-degree temperature rating matches the listed application requirements, and the housing dimensions provide important reference points for fitment verification. Use the Stant 15309 when servicing compatible BMW cooling system applications that call for this integrated design. This part number, 15309, is associated with select BMW X5 and BMW 335d applications.

What It Is Used For

  • Replacing a leaking or cracked thermostat housing
  • Restoring proper coolant flow control
  • Addressing thermostat-related overheating concerns
  • Correcting temperature regulation issues in the cooling system

Installation Notes and Tips

Verify the 190-degree specification and housing dimensions before installation. Confirm the application details against the vehicle’s cooling system requirements, especially when replacing an integrated thermostat housing. For fitment reference, this part number 15309 fits 2009-2013 BMW X5, N/A and fits 2009-2011 BMW 335d, N/A.

Quality Assurance

Stant supplies cooling system components with an integrated thermostat housing design that supports straightforward replacement service. Part number 15309 is built for the listed BMW applications and cooling system specifications.

Related reading

This part fits 8 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelNotes
2013BMWX5Temperature 190 Degrees; Integrated Thermostat Housing
2012BMWX5Temperature 190 Degrees; Integrated Thermostat Housing
2011BMW335dTemperature 190 Degrees; Integrated Thermostat Housing
2011BMWX5Temperature 190 Degrees; Integrated Thermostat Housing
2010BMW335dTemperature 190 Degrees; Integrated Thermostat Housing
2010BMWX5Temperature 190 Degrees; Integrated Thermostat Housing
2009BMW335dTemperature 190 Degrees; Integrated Thermostat Housing
2009BMWX5Temperature 190 Degrees; Integrated Thermostat Housing