Common Symptoms of a Failing Thermostat Housing:

• Engine overheating
• Coolant leaks
• Fluctuating temperature gauge
• Poor heater performance
• Check engine light related to temperature

Replacing the assembly helps restore proper cooling system function and prevents engine damage.

Product Overview: A-Premium Thermostat Housing Assembly

This A-Premium thermostat housing assembly is a direct-fit replacement designed for Infiniti and Nissan vehicles equipped with the 3.5L V6 engine.

Key Features:

• Complete housing assembly with integrated thermostat
• Direct OEM replacement for easy installation
• Durable, heat-resistant construction
• Ensures proper coolant flow and temperature regulation
• Helps prevent overheating and engine damage

OE Replacement Thermostat Housing Assembly, In an instant Are compatible.

How to Install a 350Z Thermostat – this guide can help you replace / service the ECT of your Nissan.

Compatible Vehicles

Infiniti Models:

• FX35 (2003–2007)
• G35 (2003–2007)
• QX4

Nissan Models:

• 350Z
• Pathfinder (2001–2006)

(Compatible with 3.5L V6 engines. Always verify fitment by year and trim.)

Colour/End: Herbal; Gasket or Seal Included: Sure; Thermostat Included: Sure; Mounting Hollow Amount: 3

Don’t forget that the ECT for the 350Z is the same as the G35. Learn how to service it here using this guide.

Why Replace the Entire Assembly?

Replacing the full thermostat housing assembly instead of just the thermostat can:

• Prevent future leaks
• Ensure proper sealing
• Save labor time
• Improve long-term reliability

Installation Notes

• Located near the engine coolant outlet
• Requires draining coolant before installation
• Basic tools required
• Replace gasket/seals if applicable
• Professional installation recommended if unsure

Reference Number: 212004W010, 212004W01B, 902-5149, 9025149, THN015, 85687, 34041, THN007, TI25677D, 85951, 391180, SK9025149, 14668

Performance Benefits

Replacing your thermostat housing assembly can:

• Restore proper engine temperature control
• Prevent overheating
• Improve heater performance
• Protect engine components from heat damage

Frequently Asked Questions

What happens if the thermostat housing fails?

It can cause coolant leaks, overheating, and improper engine temperature regulation.

Should I replace the thermostat and housing together?

Yes, replacing the complete assembly ensures better reliability and prevents repeat repairs.

Is this difficult to install?

It varies by vehicle, but many DIYers can complete it with basic tools.

Conclusion

If your Infiniti or Nissan 3.5L V6 engine is experiencing overheating or coolant leaks, this A-Premium thermostat housing assembly is a reliable replacement. Designed for durability and proper cooling performance, it helps protect your engine and restore efficiency.