Symptoms
- Mirror doesn't move when using the adjustment switch
- Auto-folding mirrors don't fold in or out
- Possible grinding or straining sound from inside the mirror housing
- One mirror affected while the other works normally
Likely causes
- CommonFailed mirror adjustment motorThe small motors that tilt the mirror can wear out or seize over time.
- CommonBlown fuse for the mirror circuitA blown fuse can affect one or both mirrors depending on the vehicle's wiring.
- PossibleFaulty mirror control switchThe switch used to select and move the mirrors can wear out internally.
- PossibleFailed fold motor (for auto-folding mirrors)The separate motor for folding mirrors in and out can fail independently of the adjustment motor.
- Less commonWiring damage where the mirror connects to the doorThe flexible wiring at the door hinge can fray over years of door opening and closing.
What to do
- Check the fuse for the mirror circuit and replace it if blown.
- Try both mirrors with the switch to see if the issue is isolated to one side or affects both.
- Listen for any motor sound from inside the housing when adjusting or folding, which suggests a mechanical issue versus a dead electrical connection.
- Try the mirror control switch a few times in each direction to rule out a switch that's just sticky.
- Have a shop remove the mirror housing to inspect and replace the specific failed motor.
- Consider whether it's worth replacing just the motor versus the whole mirror assembly, since costs vary by vehicle.
Tools and parts
- Fuse puller/tester
- Trim removal tool
Mirror adjustment motorSearch: “side mirror motor for [year make model]”
Mirror control switchSearch: “mirror control switch for [year make model]”
When to call a pro
A shop can quickly test which component has failed before you buy a part, especially since some mirror assemblies come only as a full unit.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.