Replacing a number plate might seem purely mechanical, but there are important legal considerations to address before you begin.

Ensure Your New Plate Is Road Legal

Every number plate fitted to a vehicle on UK public roads must meet British Standard BS AU 145e. This means your new plate should display:

• The correct registration in the approved font (Charles Wright)
• Characters at the legally required size (79mm height for cars, 64mm for motorcycles)
• Proper spacing between letters and numbers
• The British Standard mark, supplier name, and postcode
• Appropriate reflective material (white for front, yellow for rear)

When you search for your registration and order from a registered supplier, these requirements are built in. Never fit plates that don’t meet these standards, even if they look acceptable. Show plates, for example, are designed for display purposes only and are not legal for road use.

For more detail on compliance, see our explanation of 2D plates.

Check Your Vehicle’s Fixing Method

Before removing your old plate, take a moment to understand how it’s currently attached. The most common methods are:

• Screws: Two or four screws through pre drilled holes in the plate and bumper
• Sticky pads: Double sided adhesive pads bonding the plate directly to the bodywork
• Clips or frames: Plastic clips or frames that snap onto the bumper

Knowing your current method helps you prepare the right replacement fixings and avoid surprises when you remove the old plate.

Work Safely

While this is a simple job, basic safety applies:

• Park on level ground with the handbrake engaged
• If working near the road, ensure you’re visible to other traffic
• Take care with screwdrivers to avoid slipping and damaging paintwork
• If drilling new holes, wear safety glasses and check behind the bumper for wiring or fuel lines

Step by Step Guide to Replacing Your 2D Number Plate

Now that you’re prepared, here’s how to remove your old plate and fit the new one.

Step 1: Remove the Old Number Plate

For screw fixed plates:

1. Locate all screws holding the plate in place (usually two or four)
2. Using the appropriate screwdriver, carefully unscrew each fixing, supporting the plate with your other hand as it loosens
3. Once all screws are removed, gently pull the plate away from the bumper
4. Set aside the old screws if they’re in good condition, or dispose of them if damaged or corroded

For adhesive fixed plates:

1. Gently work your fingers behind one edge of the plate
2. Slowly peel the plate away from the surface, using a steady, even pressure
3. If the adhesive is stubborn, a plastic scraper or old credit card can help without scratching paintwork
4. Remove any remaining adhesive residue with warm soapy water or a dedicated adhesive remover (test on a small area first)

For clip or frame fixed plates:

1. Identify how the clips release (some squeeze, others pull straight off)
2. Release each clip carefully to avoid breaking the plastic
3. Remove the old plate and frame if you’re replacing both

If you’ve lost a plate entirely and need guidance on next steps, our article on what to do if your number plate falls off covers the full process.

Step 2: Clean the Mounting Area

Before fitting your new plate, take a few minutes to clean the area where it will be mounted:

1. Use warm soapy water and a clean cloth to remove dirt, grime, and old adhesive
2. Dry the surface thoroughly
3. Check for any damage to the bumper or mounting points

A clean, dry surface ensures better adhesion if using sticky pads and helps you spot any issues that might affect fitment.

Step 3: Position and Mark Your New Plate

Hold your new plate up to the mounting area and check the positioning:

1. Ensure it sits level and centred on the bumper
2. If using screws, align the plate’s holes with existing fixing points
3. If the holes don’t line up perfectly, you may need to drill new ones (more on this below)
4. For adhesive mounting, mark the corners lightly with a pencil to guide placement

Take your time with positioning. A crooked or poorly placed plate looks unprofessional and could attract unwanted attention from enforcement officers.

Step 4: Attach the New Plate

Using screws:

1. Hold the plate in position and insert the first screw through the top hole
2. Tighten gently until the plate is held in place but not fully secure
3. Insert and loosely tighten the remaining screws
4. Once all screws are in place, tighten each one evenly to avoid warping the plate
5. Don’t overtighten, as this can crack the plate or damage the mounting points

Consider using anti tamper screws, which require a special tool to remove and deter theft. These are particularly worthwhile for valuable personalised registrations.

Using adhesive pads:

1. Peel the backing from the adhesive pads (usually supplied with the plate)
2. Press the pads firmly onto the back of the plate in the designated areas
3. Remove the remaining protective film from the pads
4. Carefully align the plate with your marked position
5. Press firmly and hold for 30 to 60 seconds
6. Apply even pressure across the entire plate to ensure good contact
7. Allow the adhesive to cure for at least 24 hours before driving (check manufacturer instructions)

Adhesive pads work well on smooth, flat surfaces but may not be suitable for textured or curved bumpers.

Using clips or frames:

1. If using a new frame, attach it to the vehicle first according to the manufacturer’s instructions
2. Insert the plate into the frame or clips
3. Ensure all clips are fully engaged and the plate is secure

Step 5: Final Checks

Once your new plate is fitted, complete these final checks:

1. Security: Try gently pulling the plate to ensure it’s firmly attached
2. Alignment: Step back and verify it sits straight and level
3. Clearance: Check there’s no contact with moving parts or bodywork that could cause damage
4. Reflectivity: In low light, shine a torch at the plate from a few metres away to confirm it reflects clearly
5. Compliance marks: Verify the British Standard mark and supplier details are visible

If everything looks good, you’re done. The entire process typically takes 20 to 30 minutes for a straightforward replacement.

Common Problems and How to Fix Them

Even simple jobs can present unexpected challenges. Here’s how to handle the most common issues:

Problem: Screw holes don’t align with new plate

If your new plate’s holes don’t match existing fixing points, you have two options. You can drill new holes in the bumper (ensure you check behind for wiring or other components first), or use adhesive pads instead of screws. Most modern plates come with both options included.

Problem: Stripped or damaged threads in bumper

If previous overtightening has damaged the threaded inserts in your bumper, you can use slightly larger self tapping screws, fit new threaded inserts (available from automotive suppliers), or switch to adhesive mounting.

Problem: Plate doesn’t sit flat against bumper

Curved or textured bumpers can prevent plates from sitting flush. In this case, adhesive pads may not work well. Consider using angled washers behind the screws or choosing a slightly more flexible plate material. For specialist vehicles with unusual mounting requirements, products like hex Lambo style plates or short number plates might offer better fitment.

Problem: Old adhesive won’t come off

Stubborn adhesive residue can usually be removed with warm soapy water and patience. For tougher cases, specialist adhesive removers work well, but always test on a small hidden area first to ensure they don’t damage your paintwork.

When to Seek Professional Help

While most drivers can replace a number plate at home, there are situations where professional help makes sense:

• You need to drill new mounting holes and you’re uncomfortable doing so
• Your bumper has complex bodywork or sensors that could be damaged during fitting
• The plate is for a motorcycle and requires careful positioning for legal compliance (see our range of bike plates for guidance)
• You’re fitting a specialist or custom format that needs precise positioning
• You’re simply not confident with DIY tasks

Most garages or number plate suppliers offer fitting services for a small fee (typically £10 to £20), which can provide peace of mind and guarantee correct installation.

Where to Buy Your Replacement 2D Number Plate