📋 Quick Facts
Time
30-45 minutes
Difficulty
Easy
Tools
3 tools needed
Cost
$80-350 per side
A side mirror that has been hit, smashed by a delivery van, or has dead motors comes off with three bolts behind the inner door trim. Power mirrors add one connector.
🛠 What You'll Need
- Replacement side mirror (matched to power, heat, turn signal, blind-spot features) (side mirror assemblies on Amazon)
- 10mm socket and ratchet (socket set on Amazon)
- Plastic trim removal tool kit (avoid breaking clips) (plastic trim tools on Amazon)
- Phillips screwdriver
⚠ Electrical safety: disconnect the battery firstAnytime you work near wiring harnesses, connectors, or modules, disconnect the negative battery terminal first. Modern cars route airbag, BCM, and module power through the same harnesses. A bumped connector with power live can blow a fuse, trigger an airbag fault, or fry a control module.
💡 Use plastic trim tools, not screwdriversAlmost every panel on a modern car is held by hidden plastic clips. A flathead screwdriver will snap them in half - leading to rattles and panels that refuse to sit flush. A $10 plastic trim tool kit pops clips out without breaking them. Worth every penny.
✅ Before You Start - Checklist
- Park on level, solid ground (no slopes, no soft dirt)
- Battery negative terminal disconnected and isolated
- All tools and parts on hand BEFORE you begin
- Owner's manual nearby for torque specs and locations
- Safety: gloves, eye protection, hood propped open if needed
📝 Step-by-Step Instructions
- Disconnect the negative battery terminal if the mirror is poweredSide mirrors on newer cars carry turn signals, blind-spot sensors, cameras, and heated glass. Kill power before unplugging.
- Pry the small triangle trim panel off the inside of the door at the mirror cornerUse a plastic trim tool from the bottom edge. Clips break easily - go slow and feel for resistance.
- Locate the 2-3 mounting nuts behind the panelUsually 10mm nuts on threaded studs that pass through the door sheetmetal.
- Unplug the wiring harness connectorPress the release tab and pull straight. Do not pull the wires.
- Have a helper hold the mirror, or rest it on tape, while you remove the last nutMirrors are heavier than they look - removing the last nut without a hand outside will let it drop and damage the paint.
- Pull the old mirror off the doorStraight out from the body. Check the gasket - transfer it to the new mirror if it stays intact.
- Fit the new mirror to the door, threading studs through the holesLine up carefully. The gasket between the mirror base and door is critical - no gasket means water inside the door.
- Reach inside and start the nuts by handAll threads must start by hand. Driving a nut crooked with a ratchet strips the stud and ruins the mirror.
- Tighten the nuts evenly to snugRoughly 7-10 Nm. Over-tightening cracks the plastic mirror base.
- Reconnect the wiring harness until it clicksTug gently to confirm seated.
- Reinstall the triangle trim panel, replacing broken clipsPush firmly until each clip clicks. Loose trim rattles at highway speed.
- Reconnect the battery and test mirror adjust, heat, turn signal, and blind-spot indicatorsCycle through every function. Some cars require a scan tool to calibrate blind-spot or camera-equipped mirrors.
✅ After You Finish - Verify Checklist
- No tools left in the engine bay, doors, or under the car
- Test every function of the system you worked on
- Look for leaks, loose wires, or rattles after a short test drive
- Record the date and mileage in your service log
- Recycle or properly dispose of the old part
🔗 Related Guides
❓ Frequently Asked Questions
How much does a shop charge to replace a side mirror?
$200-650 per side at a dealer for a powered mirror, $120-400 at an independent shop. The part runs $60-300 aftermarket, $250-800 OE.
Will an aftermarket mirror match my paint?
Most aftermarket mirrors come primed and unpainted. Get the color code from your door jamb and have a body shop spray it ($50-120) before install.
Do I need a scan tool after replacement?
Basic power/heat mirrors: no. Mirrors with blind-spot sensors, cameras, or auto-dim usually need calibration with a dealer or aftermarket scan tool.
Can I replace just the glass instead of the whole mirror?
Yes, if the housing and motors are fine. Glass-only replacements clip in and cost $25-90. The whole assembly is only needed if the housing is cracked or motors are dead.
My new mirror folds the wrong way - why?
You may have ordered the wrong side (driver vs. passenger). Some cars also use motors that need the BCM to learn the home position - try cycling power-fold a few times.
Should I disconnect the battery on a non-powered mirror?
Not strictly required for manual mirrors, but if the car has airbags in the door, yes - the trim removal can disturb the side-impact wiring.