The number plate bulb illuminates your vehicle’s licence plate so it can be seen clearly at night. If the bulb burns out, your number plate won’t be visible, which is a legal requirement. Replacing the number plate bulb is a simple but important repair to keep your vehicle roadworthy.

What is a number plate bulb replacement?

This service involves removing the faulty or burnt-out bulb and installing a new one. Depending on the vehicle, the bulb may be accessed from inside the boot, under the bumper, or by removing the light housing.

Why do you need a number plate bulb replacement?

A functioning number plate bulb is required by law for visibility and compliance. Without it, you risk a fine, a failed WOF or inspection, and reduced safety when driving at night.

Common signs you need a number plate bulb replacement

• Number plate is not illuminated at night
• Warning light on the dashboard for exterior lighting (on some vehicles)
• Failed WOF or inspection due to a non-functioning plate light
• Only one of the two number plate bulbs is working

What happens during a number plate bulb replacement?

A mechanic will:

1. Inspect the number plate light housing
2. Remove the faulty bulb
3. Install a new bulb of the correct type and brightness
4. Check for power supply issues if the bulb still doesn’t work
5. Test to ensure the number plate is properly illuminated

How much does a number plate bulb replacement cost?

Number plate bulb replacement typically costs $40–$80. If the light housing or wiring is damaged, repairs may cost $120–$250+.

Is it unsafe to drive with a faulty number plate bulb?

While it doesn’t affect how your car drives, it is unsafe and illegal to drive at night without a visible number plate. It can result in fines or failed inspections, so the bulb should be replaced immediately.