Replacing a wing mirror: step-by-step guide

How to fit new mirror glass or a complete wing mirror unit, and when to call a professional.

Safety first: wear gloves and eye protection when handling cracked glass. Always follow your vehicle handbook, as procedures differ between makes and models.

Step 0: decide what you are replacing

Is it the glass, the cap or the whole unit? See mirror for wing mirror to decide. Then confirm the side, trim level and features before ordering.

Replacing the mirror glass

You will need

• Correct replacement glass for the correct side
• Gloves and eye protection
• Plastic trim tool or a soft wedge
• Masking tape and a soft cloth

Steps

1. Tilt the old glass fully inward (towards the car) to expose a gap at the outer edge. On electric mirrors use the adjustment switch.
2. If the glass is broken, put masking tape across it to hold fragments together.
3. Gently ease a trim tool behind the glass and release the clips. Go slowly, as the retaining clips can snap.
4. If the glass is heated, unplug the two small connectors from the back.
5. Connect the heating wires to the new glass, matching the terminals.
6. Line the new glass up with the backing plate and press firmly in the middle until the clips click in.
7. Check adjustment, then clean off fingerprints.

Replacing the full mirror unit

You will need

• Complete replacement unit
• Trim tools and basic socket or Torx set
• Gloves
• Someone to help hold the mirror

Steps

1. Remove the small cover or trim at the inner corner of the door, near the mirror mount.
2. Disconnect the wiring plug. You may need to remove part of the door card for access.
3. Support the mirror, then undo the fixing nuts or screws, usually three.
4. Lift the old unit away and feed its wiring through the door.
5. Pass the new wiring through, connect the plug and test adjustment, heating and indicator before final fitting.
6. Fit the nuts, refit the trim and door card, then check everything works.

Common mistakes

• Ordering the wrong side or wrong specification.
• Forcing glass in or out and breaking the clips or backing plate.
• Forgetting to reconnect the heating wires.
• Not testing electric functions before refitting the door card.

When to use a fitter

If your car has blind spot sensors, a camera, memory functions or complex door electrics, a trade fitter may be the safer option.

Brand-specific notes

Each make has its own quirks. Choose yours:

• Toyota
• Volkswagen
• Hyundai
• Ford
• Skoda
• Kia
• Nissan
• Audi
• BMW
• Mercedes-Benz
• Renault
• Peugeot
• Opel
• Citroën
• Mazda
• Honda
• Volvo
• SEAT

Frequently asked questions

Can I replace a wing mirror myself?

Many drivers can replace mirror glass themselves in a few minutes. A full unit takes longer because the door panel may need to come off and wiring disconnected.

How long does it take to replace a wing mirror?

Glass usually takes 5 to 15 minutes. A complete unit often takes 30 to 90 minutes depending on the car.

Do I need to disconnect the battery?

It is a sensible precaution when disconnecting wiring on a full unit. Check your handbook, especially if your car has airbags or sensors near the door.

Is a broken wing mirror illegal?

Missing or badly damaged mirrors can lead to a problem at the NCT and may be unsafe. See our guide on whether a broken wing mirror is an NCT fail.