22/07/2002
The question of whether a third brake light is a strict requirement for passing a Ministry of Transport (MOT) test in the United Kingdom is a common one amongst vehicle owners. While it might seem like a straightforward query, the answer involves understanding the nuances of vehicle safety legislation and how it applies to different vehicle types and their original specifications. This article aims to demystify the MOT requirements surrounding the third brake light, providing clarity for drivers and ensuring their vehicles are compliant.
Understanding the MOT Test and Brake Lights
The MOT test is designed to ensure that vehicles are safe to drive on public roads. A critical aspect of vehicle safety is the braking system, and the visibility of the braking action is paramount. Brake lights, located at the rear of the vehicle, are essential for alerting following drivers when you are slowing down or stopping. The standard configuration for most vehicles has historically been two brake lights, one on each side of the rear.
The Role of the Third Brake Light
The third brake light, often referred to as the high-level brake lamp or centre brake light, was introduced to provide an additional, more visible signal to following traffic. Its position higher up on the vehicle, often in the rear window or on the boot lid/spoiler, makes it more noticeable, especially in situations where the lower brake lights might be obscured by other vehicles or poor visibility conditions. The legislation mandating their fitment on new vehicles came into effect over time.
Is a Third Brake Light Mandatory for the MOT?
This is where the distinction lies. For vehicles that were originally manufactured *without* a third brake light, fitting one is generally not a mandatory requirement for passing the MOT test. The MOT test assesses the vehicle's condition against the regulations applicable at the time of its first registration. Therefore, if your car, van, or motorcycle did not come equipped with a third brake light from the factory, you will not fail your MOT for not having one.
However, the situation changes if a third brake light was originally fitted to your vehicle. If your vehicle was manufactured with a third brake light, then it must be present and functioning correctly to pass the MOT. A missing or faulty third brake light on a vehicle that was originally equipped with one will result in a failure.
Vehicles Manufactured Before and After Specific Dates
The legal requirement for a third brake light on new vehicles evolved. For passenger cars first used on or after 1st April 1986 in the UK, if they were fitted with more than two brake lights, at least two of them had to be ECE R7 compliant (effectively, working as brake lights). For vehicles first used on or after 1st January 1988, the requirements became more specific regarding the type and positioning of brake lights, including the third brake light for many categories.
It's important to note that these dates are historical benchmarks. The key principle for the MOT is whether the equipment that was *originally fitted* or is legally required for that specific vehicle type and age is present and working correctly.
What If I've Fitted a Third Brake Light Myself?
If your vehicle was not originally equipped with a third brake light, but you have chosen to fit one (perhaps for improved safety or aesthetics), then it generally needs to be working for the MOT. Once fitted, it becomes part of the vehicle's safety equipment, and its functionality will be checked. If you've fitted one, it must:
- Be visible from the rear.
- Be securely fitted.
- Emit a red light.
- Operate in conjunction with the other brake lights.
- Not be excessively bright or cause a glare.
If the aftermarket third brake light you've fitted is faulty or not working, it can lead to an MOT failure. It's also crucial that any aftermarket lights fitted comply with relevant regulations, such as E-mark or equivalent standards, to be considered legal.
Common Issues with Third Brake Lights
Even if your vehicle originally came with a third brake light, common issues can arise that might lead to an MOT failure:
- Bulb Failure: The most common culprit is a blown bulb. Ensure the correct type and wattage bulb is used.
- Wiring Problems: Loose connections, corroded wires, or damaged wiring looms can prevent the light from working.
- Faulty Switch: Less common, but the brake light switch itself could be faulty, preventing the lights from activating.
- Cracked Lens: A cracked or missing lens can lead to water ingress and bulb failure, and may also be a reason for failure on its own if it affects the light's function or visibility.
- Incorrect Bulb Colour/Brightness: Using a bulb that is not the correct red colour or is too dim or too bright can result in a fail.
Table: Third Brake Light MOT Requirements Summary
| Scenario | MOT Requirement | Outcome if Not Met |
|---|---|---|
| Vehicle originally fitted with a third brake light | Must be present and functioning correctly. | Fail |
| Vehicle NOT originally fitted with a third brake light | Not required. | Pass (regarding this item) |
| Aftermarket third brake light fitted by owner | Must be present, securely fitted, and functioning correctly. | Fail (if faulty or improperly fitted) |
Checking Your Vehicle's Specification
If you are unsure whether your vehicle was originally equipped with a third brake light, the best course of action is to consult your vehicle's owner's manual or the manufacturer's specifications. You can often find this information online by searching for your specific vehicle model and year. Alternatively, a quick look at similar models from the same era can often provide a good indication.
Conclusion: Peace of Mind for Your MOT
In summary, a third brake light is not universally mandatory for all vehicles undergoing an MOT test in the UK. The key determinant is whether the vehicle was manufactured with one. If it was, it must work. If it wasn't, you won't fail for its absence. However, if you choose to fit one, it must be correctly installed and operational. Always ensure your vehicle's lighting is in good working order to maximise safety and ensure a smooth MOT experience. Regular checks of all lights, including your brake lights, are a fundamental part of responsible car ownership.
Frequently Asked Questions
Q1: My car is from 1990 and didn't come with a third brake light. Do I need to fit one for the MOT?
A1: No, if your vehicle was not originally manufactured with a third brake light, it is not a requirement for the MOT test.
Q2: I fitted a third brake light to my 2005 car. Will it be checked?
A2: Yes, if you have fitted a third brake light, it is considered part of the vehicle's safety equipment and must be present and working correctly to pass the MOT.
Q3: What happens if my original third brake light is broken?
A3: If your vehicle was originally equipped with a third brake light and it is not working, your vehicle will fail the MOT test.
Q4: Can I use a different coloured bulb in my third brake light?
A4: No, brake lights, including the third brake light, must emit a red light. Using a different colour will result in a fail.
Q5: Is a third brake light a legal requirement in the UK for all cars?
A5: While not a requirement for older vehicles that were not originally fitted with one, third brake lights have been mandatory for new passenger cars sold in the EU/UK since specific dates (e.g., generally from the late 1980s onwards for many types) and are considered essential safety equipment.
If you want to read more articles similar to Third Brake Light: MOT Essential?, you can visit the Automotive category.