You can replace just the glass if the mirror housing is still intact
When a side mirror glass cracks or shatters, you do not have to replace the entire mirror assembly. The glass panel itself is a separate part that slides or clips into the mirror housing, and you can buy replacement glass alone for a fraction of the cost of a full mirror. The job takes 15 to 30 minutes and requires no special tools beyond a flathead screwdriver or plastic pry tool.
The catch is that mirror glass comes in different shapes, sizes, and attachment styles depending on your vehicle's year, make, and model. Ordering the wrong part wastes money. Before you buy anything, you need to know whether your mirror is heated, whether it has a backing plate, and exactly how it attaches to the housing.
Key Takeaways
- Mirror glass is sold separately from the housing and costs significantly less than a full mirror assembly.
- You must know your vehicle's exact year, make, and model to order the correct glass shape and size.
- Most mirror glass either clips into the housing or is held by a backing plate with screws or adhesive.
- Removing old glass requires gentle prying to avoid breaking the housing, and new glass usually needs to be pressed firmly into place or screwed down.
- Heated mirror glass costs more than standard glass but is necessary if your mirror has heating elements.
Identify your mirror type and attachment method
Start by looking at the back of your mirror housing from inside the vehicle. If you see a backing plate with visible screws or bolts, your mirror glass is held down mechanically. If the back looks smooth and the glass appears to be glued in, your mirror uses adhesive backing. Some vehicles use a clip-and-slot system where the glass slides into grooves in the housing.
Check your owner's manual or search your vehicle's year, make, and model online to confirm whether your mirror is heated. Heated mirrors have thin wires embedded in the glass and cost more to replace. If you are unsure, look at the back of the mirror housing for small wires or terminals. A heated mirror will have electrical connections.
Write down your vehicle's exact year, make, model, and which side (driver or passenger) needs replacement. Mirror glass is often side-specific because the curvature and size differ. This information is what you will need when ordering.
Order the correct replacement glass
Go to an auto parts retailer like AutoZone, O'Reilly, NAPA, or Advance Auto Parts with your vehicle information. You can also order online from these retailers or from the vehicle manufacturer's parts website. Tell them whether you need heated or standard glass, and confirm the attachment type before you buy.
Prices vary widely. Standard non-heated mirror glass typically costs between $30 and $80, depending on the vehicle. Heated mirror glass runs $60 to $150 or more. Some vehicles have convex or wide-angle glass that costs extra. Ordering online usually takes three to seven business days for delivery, while picking up at a local store is faster if the part is in stock.
Keep your receipt and check the part number on the box against your order. Mirror glass is not always returnable once opened, so make sure you have the right piece before you start the job.
Remove the old mirror glass safely
Park your vehicle and turn off the engine. If your mirror is heated, disconnect the negative terminal of your battery to avoid electrical shock. Wait a few minutes before touching the mirror.
If your mirror has a backing plate with screws, remove each screw carefully and set them aside in a small container so you do not lose them. If the glass is clipped in, use a plastic pry tool or the flat end of a screwdriver to gently lift one edge of the glass until it pops free from the clip. Work slowly around the edges to avoid cracking the housing.
If the glass is glued in, warm it slightly with a heat gun or hair dryer on low heat for 30 seconds to soften the adhesive. Then use a plastic pry tool to work around the edges, lifting gently. Do not use a metal screwdriver directly against the glass or housing, as this can scratch or crack both. Once the glass is loose, pull it straight out and away from the housing.
If your mirror is heated, you may see wires or a thin connector on the back of the glass. Disconnect this carefully before fully removing the glass. Take a photo of how it was connected so you can reattach it correctly.
Install the new mirror glass
Clean the back of the mirror housing with a dry cloth to remove dust, old adhesive, or debris. If there is old adhesive residue, use rubbing alcohol and a plastic scraper to remove it gently. Let the housing dry completely.
If your new glass has a backing plate with screw holes, align the holes with the housing and insert the screws. Tighten them evenly in a cross pattern (top-left, bottom-right, top-right, bottom-left) so the glass sits flat. Do not overtighten, as this can crack the glass.
If your new glass clips in, align the top edge first and press it into the upper clip. Then press down firmly on the sides and bottom until you hear or feel the clips snap into place. The glass should sit flush with the housing.
If your new glass uses adhesive, explore a thin bead of automotive-grade mirror adhesive around the back edge of the glass, following the product instructions. Press the glass into the housing and hold it firmly for 30 to 60 seconds. Let the adhesive cure for the time specified on the package, usually 24 hours, before using the mirror.
If your mirror is heated, reconnect the wires or connector to the back of the new glass before you fully seat it. Reconnect your battery's negative terminal once the glass is fully installed.
Test the mirror and check for leaks
Start your vehicle and test the mirror. If it is heated, turn on the heating function and feel the glass warm up after a minute or two. Adjust the mirror to make sure it moves smoothly and holds its position. Look for any gaps between the glass and the housing.
If you see gaps or the glass feels loose, remove it and reinstall it. If the glass is clipped in and still loose after reinstalling, the clips may be worn and the housing may need replacement. If the glass is screwed down and still moves, tighten the screws slightly more.
Check the inside of the door panel for any water leaks after the next rain. If water is getting in, the glass may not be seated properly. Remove and reinstall it, making sure the edges are fully sealed.
When to replace the whole mirror instead
If the mirror housing itself is cracked, bent, or broken, replacing just the glass will not fix the problem. A damaged housing will not hold the new glass securely and may allow water to leak into the door. In this case, you need to replace the entire mirror assembly.
If the mirror glass is held by adhesive and the housing is damaged around the edges, the adhesive may not bond properly to the new glass. Again, a full mirror replacement is the better choice.
If your vehicle is older and the mirror housing is hard to find or very expensive to replace, some people choose to replace the whole assembly with an aftermarket mirror from a parts retailer. This is usually cheaper than an OEM (original equipment manufacturer) part from the dealership, though the fit and finish may not be identical.
Frequently Asked Questions
Can I drive with a cracked mirror glass?
Yes, a cracked mirror is not a safety hazard to your vehicle, but it reduces your visibility and may be illegal in some states. Most places require all mirrors to be intact and functional. A cracked mirror also lets water into the housing, which can damage the motor or heating elements over time.
How long does mirror adhesive take to dry?
Most automotive mirror adhesives cure in 24 hours, though some fast-set products dry in 4 to 8 hours. Check the instructions on your specific product. Do not adjust or use the mirror until it is fully cured, or the glass may shift and the adhesive may not bond properly.
What if I break the housing while removing the old glass?
If you crack or chip the housing, you will need to replace the entire mirror assembly. The housing holds the glass in place and protects the internal motor and wiring. A damaged housing cannot reliably hold new glass and will likely leak water into the door panel.
Is heated mirror glass worth the extra cost?
If your vehicle came with a heated mirror, you should replace it with heated glass to maintain the same function. Standard glass will fit in the housing but will not have the heating capability. If you live in a cold climate where you use the heated mirror regularly, the extra cost is worth it.
Can I use super glue or regular adhesive instead of mirror adhesive?
No. Super glue and household adhesives do not bond well to glass and metal, and they break down when exposed to heat, cold, and moisture. Automotive mirror adhesive is formulated to withstand temperature changes and humidity. Using the wrong adhesive will cause the glass to fall out or separate from the housing.