This procedure covers removal and installation of the side mirror assembly on a 2016-2021 Honda Civic 1.5L Turbo, including power mirror models with electrical connections.

Warnings

Tools required

Parts

• Side mirror assembly (driver or passenger) × 1 — Use OEM Honda part number for specific trim level
• Door panel trim clips (if damaged) × 3 — 91501-SZ3-003

Preparation

1. Park vehicle on level surface and engage parking brake
2. Lower the front windows completely to provide access to interior door panel
3. Disconnect negative battery terminal if working with power mirror models
4. Protect door paint with masking tape around mirror base if desired
5. Have replacement mirror assembly unpacked and ready

Procedure

1. 1

   Remove door panel corner trim
   Using a trim panel removal tool, carefully pry off the triangular trim piece at the front upper corner of the door panel where it meets the mirror base. This piece snaps into place with 2-3 clips. Work from the rear edge forward to avoid breaking clips. Set aside in a safe location.
2. 2

   Disconnect mirror electrical connector
   For power mirrors: Locate the electrical connector behind the removed trim panel. Press the locking tab and pull the connector straight back to disconnect. The connector is typically gray or black with 6-8 pins. Note connector orientation for reassembly. Manual mirrors will not have this connector.
3. 3

   Remove mirror mounting bolts
   Locate three 10mm mounting bolts securing the mirror assembly to the door frame. These are arranged in a triangular pattern. Using a 10mm socket, remove all three bolts completely. Support the mirror assembly from outside while removing the final bolt to prevent it from falling.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
4. 4

   Extract mirror assembly
   While supporting the mirror from outside, carefully pull the mirror assembly away from the door. If equipped with power mirrors, feed the wiring harness through the door opening as you remove the assembly. Check that all fasteners have been removed if assembly does not pull free easily. Do not force.
5. 5

   Prepare new mirror assembly
   Unpack the replacement mirror assembly. For power mirrors, verify the electrical connector matches the vehicle connector. Check that all mounting surfaces are clean and free of shipping protective coatings. If replacing due to impact damage, inspect the door mounting surface for damage or deformation that may affect fit.
6. 6

   Install new mirror assembly
   For power mirrors, feed the wiring harness through the door opening first. Align the mirror base with the three mounting holes on the door frame. Hold the assembly firmly in position from outside while installing fasteners from inside. Start all three mounting bolts by hand to ensure proper thread engagement before tightening.
   Torque spec

   Module Mounting Bolts8 Nm (6 lb-ft)
7. 7

   Torque mounting bolts
   Using a torque wrench, tighten the three mirror mounting bolts to 26.0 Nm (19.0 lb-ft) in a star pattern (alternate between bolts) to ensure even pressure distribution. Do not overtighten as this may crack the mirror base or door panel mounting bosses.
8. 8

   Reconnect electrical connector
   For power mirrors: Align the electrical connector with the mirror connector, ensuring proper orientation. Push together firmly until you hear and feel a positive click indicating the locking tab has engaged. Gently tug on the connection to verify it is secure.
9. 9

   Reinstall door panel trim
   Align the triangular trim panel with its mounting location. Ensure any wiring is properly routed and not pinched. Press firmly on each clip location until you hear snaps confirming full engagement. Verify the trim sits flush with surrounding door panel surfaces.
10. 10

    Reconnect battery and test
    Reconnect the negative battery terminal if previously disconnected. For power mirrors, turn the ignition to the ON position (engine does not need to run). Test all mirror functions: up/down/left/right adjustment, and heated mirror operation if equipped. Test both driver control and passenger control switches.

Reassembly

1. Ensure all three mounting bolts are torqued to specification before considering the job complete
2. Verify electrical connector is fully seated with locking tab engaged
3. Check that door panel trim is fully seated with no gaps
4. Remove any protective masking tape from door paint

Verification

• Visually inspect mirror alignment compared to opposite side mirror for symmetry
• For power mirrors, verify all adjustment directions function smoothly without binding or unusual noise
• Test heated mirror function by turning on rear defroster (mirrors typically activate with rear defroster on this model)
• Verify mirror does not vibrate excessively at highway speeds during test drive
• Check that turn signal indicators function properly in mirror housing if equipped with this feature

More procedures for this vehicle