A cracked, faded or delaminating number plate is an easy job to put right. The trap is treating it as pure cosmetic work. The plate must be made correctly, and the way it is attached must not make any character, spacing or required marking hard to read.

For most cars, the decision is between screws and adhesive pads. Either can work, but choose the plate first, check the mounting points on the car, then fit it without drilling through anything important. A plate that looks smart in the driveway can still cause an MOT problem if a fixing breaks up a letter or number.

Start with a legal replacement plate

Do not order the cheapest plate and worry about fitting later. GOV.UK’s number-plate rules say a normal car plate must be reflective, with black characters on white at the front and black characters on yellow at the rear. It must not have a background pattern.

Plates fitted after 1 September 2021 should carry the British Standard marking BS AU 145e, together with the supplier’s name and postcode. The characters must be non-reflective and, on newer plates, a single shade of black. Raised 3D characters are permitted, but that does not make every smoked, tinted, gel or novelty plate legal.

Buy from a registered number-plate supplier. They will need to see original documents proving your identity and entitlement to the registration number, commonly a driving licence or other accepted ID plus the V5C. GOV.UK has a postcode search for registered suppliers. Be wary of a seller happy to make any registration with no checks.

Before removing the old plate

  • Check the new plate against the old one character by character. Do not rely on a confirmation email or a quick glance. A wrong character is far easier to correct before it goes on the car.
  • Look at the mounting points on the vehicle. Many cars have two or four factory holes, while some use a recessed panel that suits adhesive pads better. Note where the old screws sit before removing them.
  • Inspect the panel behind the plate. A loose bracket, broken clips or corroded screw holes should be fixed before the new plate is fitted. Do not use the new plate to disguise a damaged mounting.
  • Clean and dry the surface. Adhesive pads need a clean, dry, grease-free surface. Dirt and old foam residue are a common reason for a plate to come loose later.
  • Keep the old plate until the job is finished. It is useful for checking the registration, plate size and mounting position. Dispose of it securely once the replacement is fitted so it cannot be reused dishonestly.

Screws or sticky pads?

Screws are a sensible choice when the car has sound, original mounting holes and the new plate was made with matching holes. They are easy to inspect and less dependent on surface preparation. Use corrosion-resistant screws and avoid overtightening: a bowed or cracked plate will not last.

Automotive-grade adhesive pads give a cleaner finish and avoid drilling. They suit cars with a flat, clean mounting area, particularly where the plate holder has no useful holes. Use enough pads to support the plate evenly, press it firmly into position and follow the pad maker’s curing advice before washing the car or driving in severe weather.

Neither method gives permission to alter the appearance of the registration. Do not put a screw, cap, badge, frame or pad where it changes the apparent shape of a character. A fixing through an O, C, E or a zero can make the registration look different from a distance, even if the intention was harmless.

How to fit a plate with screws

  1. Hold the new plate in the correct position and check that it is level, centred and fully supported by the mounting area.
  2. Use existing factory holes where they line up. If they do not, ask the plate supplier about a suitable pre-drilled plate or use an adhesive mounting method instead of guessing where to drill.
  3. Make sure any hole is well away from every character, the supplier marking and the British Standard marking. Never drill through a letter or number.
  4. Fit the screws by hand at first. Tighten only until the plate is secure and flat. Do not crush the plastic or twist the plate against the bodywork.
  5. Stand back and read it from several metres away. Check that screw heads have not turned one character into another and that the plate is not obscured by a frame.

How to fit a plate with adhesive pads

  1. Remove every trace of old adhesive, then clean the mounting panel and the back of the new plate with a suitable panel wipe or isopropyl alcohol. Let both surfaces dry completely.
  2. Do a dry run. Mark the centre point with low-tack tape if needed, because strong pads allow little scope for repositioning.
  3. Apply the pads evenly around the back of the plate, keeping them away from raised edges. Do not leave the corners unsupported.
  4. Peel the backing, align the plate carefully and press firmly across the whole surface. Hold pressure at the corners as well as the middle.
  5. Before setting off, pull gently at each edge. The plate should not flex away from the car. Recheck it after the first wet or very cold journey.

Common mistakes that turn a small job into a problem

  • Using decorative fixings. Fancy caps or dark screws can draw attention to a character or make it less clear. Plain, unobtrusive fixings are the better choice.
  • Fitting a border or holder that covers the legal marks. The supplier details and British Standard marking need to remain visible.
  • Adding tinted covers, stickers or a patterned background. The plate itself has specific colour and readability rules. A clear-looking modification at close range may not read correctly to a camera or examiner.
  • Trying to close up the spacing. The registration must be displayed as issued. Do not rearrange characters, move them together or use a screw to create a misleading gap.
  • Leaving a plate loose. A plate that can fall off, flap around or detach is not a minor cosmetic issue. Replace failed pads, damaged clips or cracked plates promptly.

Will a badly fitted plate fail an MOT?

It can. GOV.UK says incorrectly displayed number plates can lead to a fine of up to £1,000 and an MOT failure. An MOT is not the moment to discover that a mounting screw has obscured a character, a frame covers the markings or a tinted plate is difficult to read.

That is why a quick final inspection is worth doing. In daylight, confirm the front plate is white, the rear is yellow, the registration reads correctly, spacing is untouched and every character is clear from a few paces away. If there is any doubt, correct it before driving.

The sensible final check

Replacing a number plate does not change the vehicle’s registration and does not normally require a DVLA update. What matters is that the physical plate faithfully displays the registration already assigned to the car.

Use a registered supplier, buy a compliant plate, attach it securely and keep every character and required marking clear. That is cheaper and less stressful than fitting a fashionable plate twice, or finding out at an MOT that a small screw caused a big avoidable issue.