How to properly fix a license plate in a frame on a car: 7 methods + mistakes

Attaching a state license plate to a frame is a task that seems simple only at first glance. In practice, car owners are faced with a lot of nuances: from GOST requirements R 50577-93 to the risk of losing your number due to vibrations or vandals. Errors in installation threaten not only with a fine for unreadable sign (Part 1 of Article 12.2 of the Code of Administrative Offenses - 500₽), but also problems when passing a technical inspection.

In this article we will analyze 7 proven fastening methods - from budget (double-sided tape, plastic ties) to professional (vandal-proof bolts, rivets). We will pay special attention illuminated frames, aluminum/plastic bases and nuances for cars with bumpers made of ABS plastic. You will also learn what methods are prohibited by the traffic police, how to avoid corrosion of fasteners and what to do if the license plate “walks” when driving off-road.

1. GOST and traffic rules requirements for mounting license plates in a frame

Before choosing an installation method, study the regulations. According to GOST R 50577-93 and Order of the Ministry of Internal Affairs No. 664 (2017), the license plate must:

• 📏 Be pinned strictly parallel to the road surface (allowable tilt angle is no more than 3°).
• 🔍 Provide clear readability symbols from a distance of 20 meters during daylight hours.
• 🚫 Don't have foreign elementscovering numbers/letters (including frames with protrusions).
• 💡 Have backlight (for the rear sign) with an intensity of 20–300 cd (candelas).

Important: the frame is considered acceptableif she:

• ✅ Does not cover the fields of the sign (the minimum distance from the edge of the frame to the symbols is 5 mm).
• ✅ Made from non-magnetic materials (aluminium, plastic, stainless steel).
• ✅ Does not distort the color of the sign (tinted or mirrored frames are prohibited).

⚠️ Attention: Usage magnetic frames (even with a “legal” mount) may result in a fine. Traffic police inspectors interpret them as a means hiding the number (Part 2 of Article 12.2 of the Administrative Code - 5,000 rubles or deprivation of rights).

If you are installing a frame with backlit, make sure that:

• 🔆 LEDs have white or yellow color (blue/red is prohibited).
• 📐 Light sources are located evenly and do not create glare.
• ⚡ Connection goes through fuse (recommended rating - 5A).

2. Methods of attaching a number in a frame: pros and cons

The choice of method depends on the frame material, bumper type and operating conditions. Below is a comparison 7 popular options, sorted by reliability.

Mounting method	Suitable for frames	Pros	Cons	Cost (₽)
Anti-vandal bolts	Metal, aluminum	✔ Maximum protection against theft ✔ Durability (10+ years)	✖ Difficult installation (requires a star key) ✖ Risk of damage to the bumper during installation	300–800
Rivets (rivets)	Aluminum, steel	✔ Reliability (withstands vibrations) ✔ Low price	✖ Permanent connection ✖ Requires a riveter	50–200
Self-tapping screws for metal	Plastic, aluminum	✔ Quick installation ✔ Possibility of dismantling	✖ Risk of corrosion ✖ Attenuation due to vibrations	30–150
Double-sided tape (3M VHB)	Lightweight plastic frames	✔ No drilling ✔ Suitable for rented cars	✖ Low strength (falls off at -20°C) ✖ Not for off-road use	100–300
Plastic ties	Temporary fastening	✔ Cheap ✔ Fast	✖ Destroyed by UV rays ✖ Unaesthetic	10–50

Critical nuance: if your car's bumper is made of ABS plastic (for example, Lada Vesta, Kia Rio), screws and bolts will loosen the holes over time. In this case, the best choice is rivets or tape. 3M VHB 4950 (withstands up to 8 kg/cm²).

3. Step-by-step instructions: attaching the number with bolts

This is the most reliable method recommended for metal frames and cars with steel bumpers (for example, UAZ Patriot, GAZelle Next). You will need:

• 🔧 Anti-vandal bolts M5×16 mm (4 pcs.).
• 🔧 Grover washers (to prevent self-unscrewing).
• 🔧 Drill with drill bit ∅4.2 mm (for metal).
• 🔧 Star key (for anti-vandal bolts).
• 🔧 Sealant ABRO RS-60 (for corrosion protection).

Mark the holes on the frame and bumper (use a marker and ruler)

Drill holes (drill diameter is 0.2 mm less than bolt diameter)

File the edges of the holes (remove burrs)

Apply sealant to bolt threads

Install bushing washers between the frame and the bumper -->

Step 1. Marking. Attach the frame with the number to the bumper and mark the drilling locations with a pencil. The distance between the holes must match the standard 112×20 mm (for European numbers). To check, use a caliper or a ruler with a millimeter scale.

Step 2. Drilling. Start with a small drill (∅2 mm), then widen the hole to 4.2 mm. For plastic bumpers, use a drill bit with acute sharpening angle (118°) to avoid chipping. Drill speed - no more than 1000 rpm.

Step 3. Install bolts. Insert the bolt into the hole, put on the washer, then tighten firmly 1.5–2 Nm (use a torque wrench). For anti-vandal bolts, after tightening, break off the head with a special key.

⚠️ Attention: If your car's bumper has internal stiffeners (for example, Toyota RAV4), before drilling, check their location so as not to damage them. Use endoscope or a thin metal probe.

4. Alternative methods: when bolts do not fit

If your car has fragile plastic bumper (for example, Hyundai Solaris, Renault Duster) or you don't want to drill holes, consider these options:

4.1. Double sided tape 3M VHB

Suitable for frames weighing up to 500 g. Algorithm of actions:

1. Clean the surface of the bumper and frame isopropyl alcohol (do not use acetone!).
2. Place the tape on the frame after warming it up hairdryer (temperature 50–60°C improves adhesion).
3. Press the frame firmly against the bumper 30 seconds, then do not operate the vehicle for 24 hours.

The service life of such fastening is 2–3 years (assuming no high pressure washing).

4.2. Plastic ties (clamps)

Temporary solution for frames without holes. Cons:

• ❌ Suitable only for lightweight plastic frames.
• ❌ They can rub off the bumper paint due to vibrations.
• ❌ Prohibited by the traffic police for permanent use (fine under Part 1 of Article 12.5 of the Administrative Code).

4.3. Rivets (rivets)

The best choice for aluminum frames. Use blind rivets ∅4 mm made of stainless steel. To install:

1. Drill holes in the frame and bumper (the diameter is 0.1 mm larger than the diameter of the rivet).
2. Insert the rivet into the gun and squeeze the handles until they click.
3. Finish the seams silicone based sealant.

How to remove a rivet without damaging the bumper?

For dismantling, use a drill with a ∅3.2 mm drill. Carefully drill out the center of the rivet, then pry it out with a screwdriver. If the rivet is stuck, apply WD-40 and wait 10 minutes.

5. Mistakes when attaching a license plate: how to avoid a fine

Even competent installation can turn into problems if you make these mistakes:

1. Using “original” bumper holes without reinforcement.

   On many cars (for example, Volkswagen Polo) standard holes for the number become loose after 1–2 years. Solution: install metal bushings or use bolts with thread lock (for example, Loctite 243).

2. Fastening on a dirty surface.

   Dust, oil or wax on the bumper will reduce the adhesion of the tape to the bumper. 70%. Clean the surface degreaser APP W900 and wipe with a lint-free cloth.

3. Ignoring thermal expansions.

   Plastic frames when heated (for example, in the summer under the sun) may become deformedif they are fixed too tightly. Leave a gap 0.5–1 mm between the frame and the bumper.

4. No anti-corrosion treatment.

   Bolts and screws without protection will rust in 6–12 months. Use zinc coating or apply sealant Liqui Moly Kupfer-Spray on the thread.

⚠️ Attention: If the license plate is assigned at an angle of more than 3° (for example, due to deformation of the bumper after an accident), the traffic police inspector has the right to issue a fine under Part 1 of Art. 12.2 Code of Administrative Offences. Check the tilt angle using bubble level.

6. Anti-vandal protection: how to protect your number from theft

According to statistics from the Ministry of Internal Affairs, in 2023 it was stolen in Russia more than 120,000 license plates. To protect your number:

• 🔐 Use anti-vandal bolts with break-off head (for example, HEYNER 8700). They cannot be unscrewed without a special key.
• 📸 Install mini camera (for example, Xiaomi Mi Home Camera) in the parking area with a view of the room.
• 🛡️ Apply to frame UV tags (invisible ink Securit UV). This will help identify the number if it is stolen.
• 🚨Connect alarm with tilt sensor (for example, StarLine A93). It will work when you try to rent a number.

If the number is still stolen:

1. Contact the police immediately (a report can be made through portal of the Ministry of Internal Affairs).
2. Obtain a certificate of theft (needed to restore the number in the traffic police).
3. Order a duplicate sign via traffic police website (cost - 2,000₽, production time - 5 days).

7. Mounting features for illuminated frames

Frames with LED backlight (for example, models HELLA 8DL or OSRAM LEDriving) require additional steps during installation:

• 🔌 Connection to on-board network:

  Connect the rear license plate light to reverse lamp or side lights through relay (for example, Bosch 0 332 019 150). Direct connection to the battery will lead to battery discharge.

• 🛠️ Sealing connections:

  Treat all soldered contacts and connectors heat shrink tube or sealant Permatex 22B. This will protect against short circuits when exposed to moisture.

• ⚡ Voltage check:

  LED strips are designed for 12V, but in the on-board network there can be up to 14.4V. Use voltage stabilizer (for example, XL6009).

The backlight is not required for the front license plate, but if you install it, connect it to side lights through diode separator (to avoid stress on the chain).

FAQ: Frequently asked questions about attaching numbers

❓ Is it possible to attach the number to magnets if the frame is metal?

No. Even if the frame is metal, the use of magnets is equivalent to hiding the number (Part 2 of Article 12.2 of the Administrative Code). The exception is temporary mounting at exhibitions (with the permission of the traffic police).

❓ Which tape is better for attaching a plastic frame?

The best option is 3M VHB 4950 (withstands up to 8 kg/cm²) or Tesa Powerstrips (for uneven surfaces). Regular stationery tape will fall off in 1-2 weeks.

❓ Do I need to drill the bumper if it already has holes for the number?

If the holes are loose or do not align with the frame fastenings, drill again optional. Use threaded bushings (for example, M5 in brass) to restore the thread.

❓ How to protect fasteners from corrosion during the winter?

Apply to bolts graphite lubricant or sealant Liqui Moly Kupfer-Spray. An alternative is bolts from stainless steel A2-70 (marking on the head).

❓ What to do if the number vibrates off-road?

Install rubber gaskets between the frame and the bumper (thickness 1–2 mm). For edge cases use silicone sealant as a shock absorber.