Recirculation shutter motor failure — Mazda-donor fix

Tags: #hvac

The recirculation-mode shutter motor's internal gears can break, causing a clicking sound whenever the shutter operates ¹. The OEM replacement comes in the same housing as the heater shutter motor — only the internals differ ¹.

Fix used: a used Mazda recirculation motor, sourced from a salvage yard, tested and verified to work as a substitute ¹². The motor is accessible after removing the glove box; removal requires taking out 3 screws (2 front, 1 rear). Tool access is tight and requires socket drivers. Replacement takes roughly 15 minutes ¹².

Media

Recirculation motor with broken gear teeth (only 3 of the original 6 teeth remaining)

Installation position of the recirculation motor in the engine bay/dash area

Related pages

• HVAC blower motor — failure and repair
• Heater fan motor failure — diagnosis and repair
• Cabin air recirculation servo motor
• HVAC blend-door damper — failure modes
• HVAC controls — recirculation and mirror heating

Sources

This page is compiled from 2 community messages. Every fact carries a numbered reference to its original author and message.

Last updated: 2026-07-20