Keep cabin airflow moving to the right vents with the Dorman - OE Solutions HVAC Blend Door Actuator 604-331 (also written 604331). This electric actuator drives the blend door that directs and mixes airflow inside the HVAC case, and it installs as a direct-fit replacement for the 2003-2009 Lexus GX470 and 2003-2009 Toyota 4Runner. It is cataloged for the RIGHT MAIN position — because these vehicles use several actuators for different doors, confirm this matches the location and function of the unit you need to replace.
Direct replacement: engineered to drop in like the original air door actuator on the listed applications, restoring proper HVAC operation.
Position specific: vehicles often have multiple HVAC door actuators, so review this part's application notes to verify it matches the location and function of the actuator you're replacing.
Durable construction: designed and tested to strict standards to help resist wear and electrical burnout for reliable operation and long service life.
Trustworthy quality: backed by a team of experts and engineers in the United States and more than a century of experience.
Signs the original actuator may need replacing include clicking or knocking behind the dash, temperature or airflow that won't change on that door, or a blend door stuck on one setting. See the Buyer's Guide tab for engine details.
Interchange: DA1232 · ADA666 · ADR4476 · 8710635140 · 8710635180
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this actuator do?
It's an electric motor that drives the HVAC blend door, directing and mixing airflow inside the heating and A/C case. This unit is cataloged for the RIGHT MAIN position.
What vehicles does the 604-331 fit?
It's a direct-fit replacement for the 2003-2009 Lexus GX470 and 2003-2009 Toyota 4Runner. See the Buyer's Guide tab to confirm your exact application and position.
How do I know I need the right actuator position?
These vehicles use several actuators for different doors. Review the application notes to verify this matches the position and function you need; if unsure, consult a qualified service technician.
What are signs a blend door actuator may be failing?
Common signs include clicking or knocking behind the dash, temperature or airflow that won't change on that door, or a blend door stuck on one setting.
What numbers does this part interchange with?
It cross-references DA1232, ADA666, ADR4476, 8710635140, and 8710635180.
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