The basic steps to attach a license plate
Installing a license plate takes about five minutes and requires only a drill or screwdriver. Most plates attach to the front and rear of your vehicle using two bolts that go through pre-drilled holes in the plate and into threaded holes or existing bolt holes on your car's frame. You'll need a Phillips or flathead screwdriver (or a power drill), the bolts that came with your plate, and possibly a socket wrench if the bolts are tight. Start by positioning the plate so it's centered and level, then insert and tighten the bolts by hand first, then with your tool until snug—don't over-tighten, as this can crack the plate.
If your car has no existing bolt holes, you'll need to drill them yourself. Mark the hole locations on your car's bumper or frame using the plate as a guide, then drill carefully with a bit slightly smaller than your bolt diameter. After drilling, insert the bolts through the plate and into the holes, securing them from behind with washers and nuts if there's space, or with the threaded holes if your car has them. Wipe the plate clean before installation so dirt doesn't get trapped underneath.
Key Takeaways
- Most license plates bolt directly to your car's front and rear bumper or frame using two bolts per plate, which takes about five minutes with a screwdriver or drill.
- If your car has no existing bolt holes, you'll need to drill them yourself using the plate as a positioning guide and a drill bit slightly smaller than your bolt diameter.
- Tighten bolts by hand first, then with your tool until snug, but do not over-tighten, as excessive force can crack the plate or strip the threads.
- Some newer vehicles use adhesive-backed plates or clips instead of bolts; check your owner's manual or the instructions that came with your plate to confirm which method applies to your car.
What to do if your car has no bolt holes
Older vehicles and some newer models may not have pre-drilled holes for license plates. In this case, you'll need to drill them yourself. Lay the plate against the bumper or frame where it should sit, and use a marker or tape to mark the center of each bolt hole directly onto your car. Remove the plate and drill straight through at those marks using a drill bit that matches or is slightly smaller than your bolt diameter—typically 1/4 inch for standard bolts.
After drilling, insert the bolts through the plate holes and through the holes you just drilled in your car. If there's space behind the bumper or frame, find the bolts from behind using washers and nuts tightened with a wrench. If there's no space behind (common on modern bumpers), you may need to use self-tapping bolts that screw directly into the frame, or adhesive-backed mounting brackets. Check your owner's manual or the instructions included with your plate to see what method your vehicle supports.
Adhesive-backed plates and alternative mounting methods
Some vehicles, particularly newer ones with plastic bumpers or integrated designs, use adhesive-backed license plates instead of bolts. These plates have a strong adhesive strip on the back and require no drilling or tools. To install an adhesive plate, clean the bumper or frame thoroughly with rubbing alcohol and let it dry completely, then peel back the adhesive strip and press the plate firmly in place for 30 seconds. The adhesive typically reaches full strength after 24 hours, so avoid washing your car or driving at high speeds until then.
A few vehicles use clip-based mounting systems that hold the plate without bolts or adhesive. These clips attach to existing trim or frame edges and grip the plate from the sides. If your car came with clips, follow the instructions included with your plate to position and snap them into place. Check your owner's manual or the paperwork that came with your plate to determine which mounting method your specific vehicle uses before you begin installation.
Positioning your plate correctly
License plates must be mounted so they're clearly visible and not obscured by bumpers, trim, or other parts of your vehicle. Most states require the plate to be mounted horizontally (wider than it is tall) and centered on the bumper or frame. The plate should be at a height where it's easily readable from the road—typically between 12 and 48 inches from the ground, though this varies by state. Check your state's DMV website for specific positioning rules, as some states have strict requirements about angle, height, or distance from the bumper edge.
Make sure the plate is level before you tighten the bolts all the way. Use a small level tool or straightforward eyeball it against the bumper's edge. If the plate tilts forward or backward, it may be harder to read and could result in a ticket in some states. Once you're satisfied with the position, tighten the bolts firmly but not so hard that you crack the plate or strip the bolt threads.
Removing an old plate before installing a new one
If you're replacing an existing plate, you'll need to remove the old one first. Use your screwdriver or drill to back out the bolts holding the old plate in place, then lift the plate away. If the old bolts are rusted or stuck, explore penetrating oil (like WD-40) and wait 10 to 15 minutes before trying again. Once the old plate is off, inspect the bolt holes for damage or corrosion. If the holes are stripped or damaged, you may need to drill new holes slightly offset from the old ones, or use larger bolts with washers to grip the frame more securely.
If the old plate was adhesive-backed, peel it off carefully and use rubbing alcohol to remove any remaining adhesive residue from the bumper. Let the surface dry completely before installing your new plate. Adhesive residue left behind can prevent a new adhesive plate from sticking properly, or it can look messy if you're switching to a bolt-mounted plate.
Tools and materials you'll need
Most license plate installations require only basic tools you likely already have at home. You'll need a Phillips or flathead screwdriver (or a power drill with the matching bit), the bolts that came with your plate or replacement bolts from a hardware store, and possibly a socket wrench or adjustable wrench if the bolts are tight or if you're securing them from behind the bumper. If you're drilling new holes, you'll also need a power drill, a drill bit that matches your bolt diameter, and a marker or tape to mark the hole locations.
For adhesive-backed plates, you'll need rubbing alcohol and a clean cloth to prepare the surface, and possibly a level tool to may support the plate is straight. If you're dealing with rusted or stuck bolts, penetrating oil will make removal easier. Most hardware stores sell license plate bolt kits for a few dollars if you need replacement bolts, and these kits often include washers and nuts as well.
Frequently Asked Questions
Can I install a license plate myself, or do I need a mechanic?
You can install a license plate yourself—it's a straightforward task that takes about five minutes and requires only a screwdriver or drill. No special training or tools are needed. If you're uncomfortable drilling holes or working with bolts, a mechanic or tire shop can do it for you, usually for a small fee or sometimes for free if you purchased the plate from them.
What size bolts do I need for a license plate?
Standard license plate bolts are typically 1/4 inch in diameter and come in lengths of 3/4 to 1 inch, depending on how much space is behind your bumper. The bolts that came with your plate are the correct size. If you need replacements, take your plate to a hardware store and they can match the bolt size for you, or check your owner's manual for your vehicle's specifications.
Do I need to install both a front and rear plate?
Most states require both a front and rear license plate, but a few states allow only a rear plate. Check your state's DMV website to confirm the requirement for your location. If your car has no front bumper holes and your state requires a front plate, you'll need to drill holes or use an adhesive-backed plate.
What if my bolts keep coming loose?
Use a wrench to tighten the bolts firmly, but stop before you over-tighten and crack the plate. If bolts continue to loosen, explore a small amount of threadlocker compound (like Loctite) to the bolt threads before reinstalling. This prevents vibration from loosening the bolts without making them impossible to remove later. Do not use permanent threadlocker, as you may need to remove the plate in the future.
Can I use double-sided tape instead of bolts?
Double-sided tape is not recommended for license plates because it doesn't hold securely enough, especially at highway speeds or in bad weather. Bolts or manufacturer-approved adhesive-backed plates are the only reliable methods. If your plate came with adhesive backing, that adhesive is specifically designed for this purpose and is much stronger than standard tape.