Installing a license plate is not just a formality for passing a technical inspection or registration with the traffic police, but also an important aspect of the aesthetics of your car. Mount for license plate frame plays a key role here, ensuring reliable fixation of the metal plate and protecting the body from damage. In the conditions of Russian roads, where vibration and temperature changes are the norm, the quality of this element comes to the fore.
Many car owners neglect the choice of high-quality fasteners, using cheap plastic screws or, even worse, tape. This leads to the fact that the number begins to rattle, twist, or, in the worst case, falls off while moving, which is fraught with fines. The right solution ensures that license plate number will remain in its place in any situation, maintaining the readability of symbols and the neat appearance of the machine.
In this article we will analyze in detail all the nuances of choice, types of materials and installation methods so that you can avoid common mistakes. We'll look at the difference between factory mounting points and generic methods, and what tools you'll need to get the job done right.
Types of fastenings and materials used
The automotive accessory market offers a variety of mounting options, and the choice often depends on where exactly the sign will be installed. The main division occurs based on the material used to manufacture the fastener itself. Metal plates, often made of stainless steel or aluminum, are considered the most durable. They are resistant to corrosion and mechanical stress, which is especially important for front bumper, where the risk of stones is higher.
Plastic fasteners, made of ABS plastic or polypropylene, are popular due to their low price and ease of installation. However, cheap plastic becomes brittle over time when exposed to ultraviolet radiation and can burst in severe frost. If you choose this option, make sure the material is labeled as frost-resistant or intended for outdoor use. Polyurethane inserts are sometimes used as a cushioning layer between the number and the frame.
Screw connections deserve special attention. Standard screws often rust after one or two seasons of use. Professionals recommend using galvanized steel or brass bolts with rubber washers. In this case, the rubber gasket acts not only as a sealant, but also as a damper, dampening vibrations that could lead to wear of the holes in the license plate.
- 🔩 Stainless steel — maximum strength, does not rust, high price, suitable for aggressive environments.
- 🛡️ ABS plastic — lightness, accessibility, risk of destruction in the cold, requires careful tightening.
- 💧 Brass with rubber - an excellent compromise, moisture protection, vibration damping, aesthetic appearance.
When choosing, you should also consider the design of the frame itself. Some models have hidden fasteners, which look more aesthetically pleasing, but are more difficult to maintain. Others feature open bolt heads that are easier to monitor for looseness. It is important that the type you choose matches the geometry of the seat on the car.
Features of installation on the front and rear bumper
Mounting a license plate on the front of the car often raises the most questions, since modern bumpers rarely have standard holes for fasteners. Owners have to mark and drill the plastic themselves. It is critical here not to damage internal elements, such as cooling radiator or wiring of fog lights. Before drilling, you must carefully probe the installation site or use an endoscope.
The rear bumper often has a more predictable design, but there are nuances here too. On many cars, in the license plate installation area there is a niche for illumination or a rear view camera. An incorrectly installed mount may block the license plate light, which is a traffic violation, or damage the camera cable. It is also important to consider the angle of the bumper so that the number can be read from the ground, and not just from the height of the SUV.
⚠️ Attention: Before drilling holes in the bumper, be sure to remove it or provide access to the back side so that the drill does not go deep and damage the wiring or radiator!
The marking process requires high precision. Use a paper template or the license plate itself as a stencil. The holes must coincide with the technological holes on the metal of the number plate, otherwise when tightening the plate will warp and it will begin to resonate at speed. To protect the edges of drilled holes in plastic, it is recommended to use special bushings or melt the edges with a heated knife, creating a bead.
Use masking tape over the drilling area to prevent the drill bit from slipping and scratching the bumper paint.
If you are installing a frame where another number or cap was previously located, check the condition of the surface. Old holes may be broken. In this case, it makes sense to move the mount a few millimeters to the side or use repair bushings of larger diameter for reliable fixation.
Tools and preparation for installation
A quality installation is impossible without the right set of tools. The basic kit includes a drill or screwdriver with a set of drills for plastic and metal. The diameter of the drill must correspond to the diameter of the mounting bolts, usually 4-5 mm. You will also need Phillips and slotted screwdrivers, and for hard-to-reach places, a ratchet with heads.
Automotive sealant is needed to seal the holes and prevent moisture from getting under the license plate, which can cause hidden corrosion of the metal of the bumper or the plate itself. Polyurethane or silicone compounds that are resistant to temperature changes are best suited. Do not use foam or adhesive that is not intended for outdoor use.
The preparatory stage also includes cleaning the surface of the bumper from dirt, bitumen stains and polishes. A greasy film will prevent the sealant or additional fixing elements (if used) from setting. Degreasing the surface with alcohol or a special cleaner is a mandatory procedure before starting work.
☑️ Preparing to install the number
It is important to prepare all the elements in advance fastening system. If you are using bolts, thread them into the frame to check the threads. If the frame is plastic, do not overtighten the bolts at this stage to avoid cracking the plastic. It is better to carry out all work at above-zero temperatures, since plastic becomes brittle in the cold.
Step-by-step instructions for installing a license plate
The installation process begins with fitting. Attach the frame with the number to the bumper and visually assess the symmetry relative to the central axis of the car. Use a tape measure to measure the distance from the edges of the bumper to the edges of the license plate on both sides. The difference should not exceed 1-2 mm, otherwise the distortion will be obvious.
After marking the drilling points, carefully make the holes. If the bumper is thick, drill gradually, without pressing hard, so as not to melt the plastic from friction. Install the bolts into the finished holes, having first placed the frame and license plate on them. Between the number plate and the frame, as well as between the frame and the bumper, you can apply a small amount of sealant to prevent rattling.
The bolts must be tightened evenly. First, tighten all four bolts by hand, then tighten them in a crisscross pattern one by one. This will ensure an even fit without distortion. Make the final tightening with moderate force: the plastic should not crack and the metal should not deform.
| Stage of work | Necessary tool | Important nuances |
|---|---|---|
| Marking | Tape measure, marker, masking tape | Checking symmetry relative to the center of the car |
| Drilling | Drill, drill bit 4-5 mm | Protection of the back side of the bumper from chips |
| Fixation | Screwdriver, bolts, washers | Use of rubber gaskets |
| Sealing | Sealant, spatula | Finishing hole edges and perimeter |
Once installed, allow the sealant to dry for the time specified by the manufacturer (usually 12-24 hours) before driving or power washing your vehicle. This will ensure the durability of the connection.
Evenly tightening the bolts crosswise is the key to avoiding distortions and rattling of the license plate at high speeds.
Rattling problems and solutions
One of the most common problems is the noise the license plate makes when driving. This occurs due to the play between the holes in the number and the mounting bolts, as well as due to the resonance of the metal plate on the plastic bumper. Over time, the holes in the thin metal of the license plate become broken, and even tightly tightened bolts do not save the situation.
To eliminate rattling, you can use additional rubber or dense foam pads between the number and the frame. Another effective method is the use of spring washers (grovers), which create constant tension on the threaded connection, preventing the bolts from spontaneously unscrewing due to vibration.
If the license plate is already deformed and the holes are badly broken, simply adding washers may not help. In this case, you can drill new holes in the license plate, shifting them relative to the standard ones, or use special adapter plates. The main thing is to ensure a tight connection between the license plate and the car body.
- 🔇 Vibration isolation — stick a piece of vibration-proofing material on the back of the number.
- 🔧 Thread locker - use anaerobic locking agent for the fastening bolts.
- 🛠️ Puck enlargement - use washers of larger diameter to cover broken holes.
Sometimes the source of noise is not the number itself, but a poorly secured frame. Check to see if it is loose relative to the bumper. If the frame is plastic and has lost its elasticity, it is better to replace it, since it is almost impossible to restore the geometry of cheap plastic.
Legal aspects and GOST requirements
In Russia, the requirements for installing license plates are regulated by GOST R 50577-2018. According to the standard, the license plate must be installed perpendicular to the longitudinal plane of the vehicle. A tilt of no more than 7 degrees is allowed, however, traffic police inspectors may interpret this differently if the number is difficult to read.
The use of frames that cover at least part of the letters or numbers, as well as advertising inscriptions on the frame that cover the region code or flag, is a violation. There is a fine for this. It is also prohibited to use frames that change the color of the characters or make them unreadable in certain lighting (for example, glare plastic).
⚠️ Attention: Frames that are darkened or tinted, making the plate symbols difficult to see, are considered to be the installation of unreadable plates and may result in a fine or loss of license.
The fastening must ensure the immobility of the sign. If the license plate is hanging on one bolt or hanging on “snot” made of wire, this can also be regarded as a violation of traffic rules. There is only one requirement: the sign must be installed in the designated place and securely fixed.
It is also worth mentioning the LED backlight. Installing additional license plate lighting that is not provided for by the vehicle design requires changes to the vehicle design. The headlight should be white; any other color (blue, red, yellow) is prohibited and will result in confiscation of equipment and a fine.
Alternative methods of fixation without drilling
For those who absolutely do not want to drill the bumper of their car, there are alternative solutions. One of them is fastening with a cable or chain to the elements of the radiator grille or bumper. This method is popular among SUV owners, but has a significant drawback: the license plate can dangle and scratch the paintwork when driving.
Another option is to use heavy-duty double-sided automotive tape (such as 3M VHB) in combination with a sealant adhesive. This method is only suitable for perfectly flat surfaces and light plastic frames. On an uneven bumper or in extreme temperatures, this design may not hold up.
Is it possible to attach the number only to tape?
Theoretically, it is possible if you use specialized acrylic tape for external use and carefully prepare the surface. However, in Russian winter conditions and pressure washing, the risk of peeling off is very high. This method is only suitable as a temporary solution.
There are also magnetic mounts that allow you to quickly remove the license plate, for example for parking in restricted areas or for race tracks. However, for everyday use on public roads this is not the most reliable solution, since the magnets can become dislodged when hit by a strong jet of water or a stone.
When choosing an alternative to drilling, always evaluate the risks of losing the number. Reliability should be a priority, since restoring a lost sign requires time, money and bureaucratic procedures.
Do I need to rent a room for pressure washing?
If the number is correctly installed and sealed, there is no need to remove it for washing. Modern fastenings can withstand pressures of up to 150 bar. However, if you notice that the number has begun to loosen, it is better to temporarily remove it or be very careful when directing the jet perpendicular to the surface.
How to remove rust from mounting bolts?
If the bolts are rusty but hold tightly, you can treat them with a rust converter and paint them over. If the rust has penetrated deeply and the bolt heads are crumbling, it is better to drill them out and replace them with new ones made of stainless steel, after lubricating the threads with graphite lubricant.
Can I use regular wood screws?
Strongly not recommended. Wood screws have large threads and will quickly destroy the holes in the license plate when vibrated. In addition, they do not have corrosion protection and will rust after a few months, making subsequent removal of the number plate impossible without damaging the bumper.
What to do if the standard hole in the bumper is broken?
If the hole in the plastic bumper is broken, you can try moving the number higher or lower by drilling new holes. If this is not possible, use repair bushings or weld the hole with special solder for plastic, and then drill again in the right place.