What you can do about a broken or loose side view mirror
A side view mirror that is cracked, hanging loose, or pointing the wrong direction is a safety problem and usually something you can fix yourself in under an hour. The repair depends on what is wrong: if the glass is cracked, you replace just the glass panel. If the mirror housing is loose or damaged, you tighten or replace the whole assembly. If the mirror won't stay in the position you set it, the adjustment mechanism inside needs attention. Most of these fixes require only basic tools you likely have at home.
Start by identifying exactly what is broken. Look at the mirror from outside the car and from inside, where the adjustment controls are. This tells you whether the problem is the glass, the housing, the mounting bracket, or the motor that moves the mirror. Each problem has a different fix, and knowing which one you have saves time and money.
Key Takeaways
- Cracked glass can be replaced alone without removing the whole mirror housing, and replacement glass panels cost between $15 and $50 depending on your car model.
- A loose mirror housing usually means the bolts connecting it to the car door have come undone, and tightening them with a wrench often solves the problem in minutes.
- If the mirror glass won't stay in the position you set it, the adjustment mechanism is worn and the whole mirror assembly usually needs replacement.
- You can find the correct replacement mirror by giving your car's year, make, and model to an auto parts store, and installation takes 15 to 30 minutes with basic hand tools.
Replacing cracked or damaged mirror glass
If only the glass is cracked but the mirror housing and frame are intact, you can buy a replacement glass panel and swap it out without removing anything else. The glass is held in by adhesive or a plastic clip frame on the back. Look at the edges of the glass from the side to see how it is attached.
To remove the old glass, heat the edges gently with a hair dryer for 30 seconds to soften the adhesive, then use a plastic scraper or old credit card to pry the glass away from the frame. Work slowly and from one corner so the glass does not shatter. Once it is off, scrape away the old adhesive with the plastic scraper until the frame is clean and smooth.
Clean the frame with rubbing alcohol and let it dry completely. explore new adhesive (usually a strong automotive-grade double-sided tape or mirror adhesive) to the back of the replacement glass, then press it firmly into the frame and hold it for 30 seconds. Let the adhesive cure for the time the product specifies—usually 24 hours—before using the mirror. Replacement glass panels for most cars cost $15 to $50 and are sold at auto parts stores by vehicle year, make, and model.
Tightening a loose mirror housing
If the entire mirror assembly is loose and moves when you touch it, the bolts connecting the housing to the car door have likely come undone. This is one of the quickest fixes. Look at the back of the mirror where it connects to the door, either from inside the car or by opening the door panel if your car requires it.
You will see two or three bolts (usually 10mm or 13mm) holding the mirror to the door. Use a wrench or socket set to tighten each bolt by turning clockwise. Do not over-tighten—stop when you feel solid resistance. Test the mirror by pushing on it gently; it should not move. If it still moves after tightening, one of the bolts may be stripped (the threads are damaged), and that bolt will need to be replaced with a new one of the same size.
Fixing a mirror that won't stay in position
If you can move the mirror glass with the adjustment controls inside the car, but it drifts back to the wrong position or does not respond to the controls at all, the adjustment mechanism is worn out. This mechanism uses a motor and gears (on power mirrors) or a cable system (on manual mirrors) to move the glass. Once these wear out, they cannot be repaired—the whole mirror assembly must be replaced.
Before you replace it, check that the problem is not straightforward a loose wire. On power mirrors, look behind the mirror housing for an electrical connector. Unplug it and plug it back in firmly; sometimes a loose connection causes the mirror to malfunction. If that does not work, the mirror assembly needs replacement.
Removing and replacing the entire mirror assembly
If the housing is cracked, the adjustment mechanism is broken, or the mirror is damaged beyond a straightforward glass replacement, you will need to remove the old assembly and install a new one. This takes 15 to 30 minutes and requires only a wrench, a screwdriver, and possibly a plastic panel removal tool.
First, locate the bolts holding the mirror to the door. On most cars, you access them from inside the door panel or from the side of the door. If the door panel covers the bolts, use a plastic panel removal tool or a flathead screwdriver to gently pry the panel away from the door, starting at one corner and working around. Once the bolts are visible, unbolt the mirror assembly. On power mirrors, unplug the electrical connector before fully removing the assembly.
Take the old mirror to an auto parts store or look up the correct replacement by your car's year, make, and model online. Replacement mirrors range from $40 to $200 depending on whether they are manual or power-operated and whether they include heating or turn signals. Install the new mirror by reversing the removal steps: bolt it to the door, plug in the electrical connector if it has one, and test the adjustment controls and glass position before closing the door panel.
Tools and materials you will need
For most mirror repairs, you need only tools you probably have at home. A wrench or socket set (usually 10mm or 13mm) tightens loose bolts. A plastic scraper or old credit card removes broken glass. A hair dryer softens adhesive. Rubbing alcohol cleans the frame. A plastic panel removal tool (or a flathead screwdriver used gently) opens the door panel if needed.
If you are replacing the glass alone, buy a replacement glass panel and automotive-grade adhesive or double-sided mirror tape from an auto parts store. If you are replacing the whole mirror, buy a replacement assembly matched to your car's year, make, and model. Most auto parts stores can look this up for you over the phone or in person if you give them your vehicle information.
When to take your car to a mechanic instead
If the mirror is attached to the door with rivets instead of bolts, you cannot remove it without drilling, and a mechanic is the better choice. If the door itself is dented or damaged around the mirror mounting point, the door may need repair before a new mirror can be installed properly. If your car has a heated mirror or integrated turn signals, and you are not comfortable working with electrical connections, a mechanic can handle the installation safely.
A mechanic can also diagnose whether a mirror that seems broken is actually a loose wire or a software issue on newer cars with electronic mirror controls. Labor for mirror replacement typically costs $50 to $150 on top of the part cost, depending on the shop and your location.
Frequently Asked Questions
Can I drive with a broken side mirror?
In most places, you can drive with a cracked mirror glass as long as you can still see out of it, but a mirror that is hanging loose or missing is illegal. Check your local traffic laws, but generally a broken mirror is a safety hazard and should be fixed before you drive the car regularly.
How long does it take to replace a mirror?
Replacing just the glass takes 10 to 15 minutes once the adhesive dries. Replacing the whole mirror assembly takes 15 to 30 minutes. If you have to remove a door panel first, add another 10 to 15 minutes.
What if I cannot get the old glass off?
If the adhesive is very strong, heat it longer with a hair dryer—up to a minute—and try again. If the glass cracks during removal, that is normal; just remove all the pieces and clean the frame thoroughly before installing the new glass. Do not force it or you may damage the frame.
Do I need to remove the door panel to access the mirror bolts?
It depends on your car. Some cars have the bolts accessible from outside or from the edge of the door. Others require you to remove the interior door panel. Check your car's manual or look at the back of the mirror to see where the bolts are before you start.
Will a replacement mirror from a junkyard work?
Yes, if it matches your car's year, make, and model and is in good condition. Junkyard mirrors are usually cheaper than new ones, but inspect it for cracks or damage before you buy it, and test the adjustment mechanism if it is a power mirror.