What a side view mirror does and why you need both
A side view mirror is the mirror mounted on the outside of your car door that shows you what is beside and slightly behind your vehicle. You need one on each side — the driver's side and the passenger's side — because they cover blind spots that your windshield and rear view mirror cannot reach. Without them, you cannot see vehicles, cyclists, or pedestrians in the lanes next to you, which is why every state requires them.
The driver's side mirror is typically slightly angled downward to show the road surface near your car. The passenger's side mirror angles more sharply outward to compensate for the larger blind spot on that side. Both mirrors are adjustable from inside the car, either by hand or by electric controls on the door panel.
Key Takeaways
- Side view mirrors show you the lanes beside your car and are required by law in every state.
- The glass can crack or shatter from impact, weather, or age, and the mirror housing can break if hit or knocked by another vehicle.
- Replacing just the glass is cheaper than replacing the entire mirror assembly, but not all mirrors can be repaired this way.
- You can drive without a side view mirror in most states only if the other side mirror works, but doing so is unsafe and may result in a ticket.
- Replacement mirrors from a dealership cost more than aftermarket mirrors, but fit and warranty differ between the two.
How to tell if your side view mirror needs replacement
A cracked or shattered mirror glass is the most obvious sign — you cannot see clearly through it, and the damage will only spread. If the glass is intact but the mirror housing is cracked, bent, or loose, the mirror may still work but is at risk of falling off or breaking further.
If the mirror does not adjust when you use the controls, the motor or cable inside the housing may have failed. If the mirror is missing entirely — knocked off by another car or a collision — you will need a new assembly. Some damage is cosmetic: small dents in the plastic housing do not affect function, but a bent mirror that points in the wrong direction does.
Check both mirrors regularly, especially after parking in tight spaces or in areas with heavy traffic. A mirror that is loose or rattles when you close the door should be tightened or inspected before it breaks completely.
Replacing just the glass versus replacing the whole mirror
If only the glass is cracked or shattered, you may be able to replace just that piece instead of the entire mirror assembly. This is cheaper — glass replacement typically costs $100 to $300 depending on whether the mirror is heated or has a turn signal built in. Removing and installing a new glass panel takes 15 to 30 minutes at a repair shop.
However, not all mirrors can be repaired this way. Older vehicles and some luxury cars have glass that is glued or fused to the housing and cannot be separated. Mirrors with integrated heating, turn signals, or cameras must be replaced as a complete unit. If you are unsure whether your mirror can be repaired, call a body shop or dealership with your vehicle's year, make, and model.
Replacing the entire mirror assembly costs $200 to $1,000 depending on the vehicle and whether you choose a dealership part or an aftermarket part. Labor typically adds another $100 to $300. This is necessary if the housing is cracked, the motor is broken, or the mirror cannot be safely reattached to the door.
Dealership mirrors versus aftermarket mirrors
A dealership mirror is made by or for the vehicle manufacturer and is may provide to match your car's exact specifications, color, and features. It comes with a warranty, usually one to three years depending on the dealership. Installation at the dealership is straightforward because the part is designed for your specific vehicle.
An aftermarket mirror is made by a third-party manufacturer and costs less — often 30 to 50 percent less than a dealership part. Most aftermarket mirrors work well and fit correctly, but the color match may not be perfect, especially on older vehicles or unusual paint colors. Aftermarket mirrors typically come with a shorter warranty or none at all.
For most vehicles, an aftermarket mirror from a reputable supplier is a reasonable choice if cost matters. For luxury vehicles, vehicles with integrated technology, or if you want a may provide color match and longer warranty, a dealership mirror is worth the extra cost. Ask the shop which option they recommend for your specific vehicle before you decide.
How to remove and install a side view mirror
Removing a side view mirror yourself is possible on most vehicles, but the process varies. Start by locating the bolts or screws that hold the mirror to the door — these are usually inside the door panel, behind a plastic cover or trim piece. You may need to remove interior door trim to access them.
Before you remove the mirror, disconnect the wiring harness if the mirror has electric adjustment, heating, or a turn signal. Take a photo of the wire connections so you can reconnect them correctly. Then unbolt the mirror from the door and set it aside.
To install the new mirror, reverse the process: bolt it to the door, reconnect the wiring harness, and test the adjustment and any electrical features before you close the door panel. If you are not comfortable working with electrical connections or removing interior trim, a body shop or dealership can do this in 30 minutes to an hour.
Driving without a side view mirror: legal and safety concerns
In every state, you are required to have at least one side view mirror — either the driver's side or the passenger's side. If both mirrors are missing or broken, you cannot legally drive the vehicle. If one mirror is damaged but the other works, you can drive, but you are operating with a significant blind spot.
Driving without a working side view mirror is unsafe because you cannot see vehicles, cyclists, or pedestrians in the lanes beside you. This increases the risk of a collision when you change lanes or merge. Police can ticket you for a missing or non-functional mirror, and the fine varies by state — typically $50 to $200.
If your mirror breaks while you are away from home, use extra caution when changing lanes: check your blind spot by turning your head and looking over your shoulder. Do not rely on your rear view mirror alone. Get the mirror repaired or replaced as soon as you can.
Preventing side view mirror damage
The most common cause of mirror damage is impact — another vehicle hitting it in traffic, a car door swinging into it in a parking lot, or a collision during a lane change. To reduce this risk, park away from high-traffic areas when possible and leave extra space between your car and others.
In winter, ice and snow can build up on mirrors and add weight that stresses the mounting bolts. Clear ice and snow from your mirrors regularly, and do not force a mirror that is stuck. In areas with heavy wind, park in a sheltered spot if you can, because strong gusts can bend or break a mirror that is not fully secured.
Check that your mirrors are tightly bolted to the door at least once a year. A loose mirror is more likely to break on impact and more likely to fall off completely. If you notice a mirror rattling or moving when you close the door, have it tightened before it becomes a problem.
Frequently Asked Questions
Can I drive with a cracked side view mirror?
Yes, if you can still see through the crack. However, the damage will spread, and the mirror may shatter suddenly. You should have it repaired or replaced within a few days to avoid losing visibility or having glass fall into traffic.
How much does it cost to replace a side view mirror?
Glass-only replacement costs $100 to $300. A full mirror assembly from a dealership costs $300 to $1,000 plus labor. Aftermarket assemblies cost less but may not match your car's color exactly. Labor typically adds $100 to $300.
What if my mirror was hit and the glass fell out?
The housing is likely still intact and can be reused. A body shop can install new glass in the existing housing for $100 to $300. If the housing is also cracked or bent, you will need a full replacement.
Do I need to replace both mirrors if only one is damaged?
No. You only need to replace the mirror that is damaged. Replacing both at once makes sense only if both are old, discolored, or if you want them to match exactly after a repair.
Can I adjust my side view mirror if it is bent?
If the mirror is bent but still attached, you may be able to adjust it back into position using the electric controls or by hand. If it is severely bent or the adjustment mechanism is broken, you will need to replace the mirror assembly.