MOT Test: Do Lights Get Checked?

Many car owners approach their MOT test with a degree of trepidation, wondering precisely which components of their vehicle will be scrutinised. Among the most common queries is whether the MOT test includes a thorough inspection of the car's lights. The short answer is a resounding yes. Your car's lighting system is a critical safety feature, and its proper functioning is paramount for both your visibility and that of other road users. Therefore, it's a significant part of the MOT examination.

Why are Lights So Important for the MOT?

The MOT (Ministry of Transport) test is designed to ensure that vehicles on UK roads are safe, roadworthy, and comply with environmental standards. Lighting plays an indispensable role in road safety. Without functioning headlights, taillights, brake lights, indicators, and fog lights, driving, especially in adverse conditions or at night, becomes incredibly hazardous. The MOT aims to prevent accidents caused by poor visibility or miscommunication between vehicles.

Which Lights Are Checked During an MOT?

The MOT tester will meticulously examine all the lights fitted to your vehicle as standard. This includes: * Headlights: Both the main beams and dipped beams are checked for correct operation, alignment, and brightness. Incorrectly aimed headlights can dazzce other drivers or provide insufficient illumination. * Taillights: These lights illuminate your vehicle's rear, making it visible to traffic behind you. They must be present, functional, and emit a red light. * Brake Lights: Essential for signalling your intention to slow down. All brake lights, including any high-level brake lights, must illuminate when the brake pedal is pressed. There should be no more than two brake lights, and they must emit a red light. * Indicator Lights (Turn Signals): These are crucial for communicating your intended direction of travel. The tester will check that all indicators operate correctly, flash at the appropriate rate, and are the correct colour (amber). * Number Plate Lights: This light illuminates your rear number plate, making it legible. It must be present and functional, emitting a white light. * Fog Lights: If your vehicle is equipped with front or rear fog lights, these will also be inspected. Rear fog lights are mandatory for vehicles registered after 1 March 2018, and their operation will be checked. Front fog lights are optional but will be tested if fitted. * Reflectors: While not lights themselves, reflectors (typically red at the rear and amber or clear at the front) are checked for their presence, condition, and security. They are vital for reflecting light from other vehicles in low-light conditions.

Common Lighting Defects That Lead to an MOT Failure

Several issues with your car's lighting can result in a failure during the MOT test. These include: * Missing Lights: Any standard-fitted light that is not present will be a failure. * Incorrect Colour: Lights emitting the wrong colour (e.g., white rear lights, red brake lights that aren't red) are a serious fail. * Faulty Operation: Lights that do not illuminate when they should, or lights that are permanently on when they shouldn't be, will cause a fail. * Flickering or Incorrect Flashing Rate: Indicators that flash too quickly or too slowly, or flicker erratically, indicate a fault. * Dim or Ineffective Lights: If headlights are too dim, they won't provide adequate illumination and could fail. * Misaligned Headlights: As mentioned, headlights aimed too high or too low are a common reason for failure. The MOT tester uses a specialised beam setter to check alignment. * Cracked or Damaged Light Lenses: While minor chips might be acceptable, cracked or broken lenses that allow water ingress or obscure the light's function will lead to a fail. * Obscured Lights: If any lights are covered by dirt, mud, or aftermarket additions that obstruct their visibility, they will fail.

What Constitutes a 'Minor' vs. 'Major' or 'Dangerous' Defect?

The MOT test categorises defects into three types: * Dangerous: This will result in an immediate MOT failure. Examples include non-functioning brake lights or headlights, or severely misaligned headlights that dazzle other drivers. * Major: This will also result in an MOT failure. Examples include a faulty indicator, a non-functioning number plate light, or a cracked lens that significantly impairs light output. * Minor: These are defects that do not cause an MOT failure at the time of the test but should be repaired as soon as possible to prevent future problems. Examples might include a slightly tarnished reflector or a light that is a little dimmer than optimal but still functional.

Preparing Your Car for the MOT: Focus on Lights

Before you take your car for its MOT, it's wise to perform a pre-MOT check yourself, paying particular attention to the lighting system. This simple step can save you time, money, and the inconvenience of a failed test. 1. Walk Around: Have a friend or family member help you. Turn on your ignition and operate each light function. Walk around the car and check: * All headlights (dipped and main beam) are working. * All taillights are working. * All brake lights illuminate when the brake pedal is pressed (this might require someone to press the pedal for you). * All indicator lights flash correctly. * The number plate light is on. * Any fog lights operate. 2. Check Lenses: Look for any cracks, damage, or excessive dirt on all light lenses. Clean them thoroughly. 3. Check Alignment: While you can't accurately check alignment without equipment, if you notice your headlights seem significantly off (e.g., pointing too high or too low), it's worth getting them adjusted beforehand. 4. Bulb Colour: Ensure all bulbs are the correct colour. For instance, indicator bulbs must be amber.

Can You Drive a Car with a Failed MOT (Lights)?

Generally, you cannot drive a car that has failed its MOT test unless you are driving it to a pre-booked appointment at a garage for repair. If your car fails the MOT due to a lighting issue, and you continue to drive it without rectifying the problem, you could be stopped by the police and face a fine or penalty points. Furthermore, driving with faulty lights is inherently dangerous.

What Happens If a Light Fails the MOT?

If your vehicle fails the MOT test because of a lighting defect, the tester will provide you with a report detailing the reasons for failure. You will then need to have the faulty light(s) repaired or replaced. Once the repairs are completed, your vehicle will need to undergo a partial re-test, focusing specifically on the failed items. In many cases, if the repairs are carried out at the same test centre, this partial re-test can be done free of charge or at a reduced cost, especially if the car is left with them for the repair.

Modern Lighting Systems and the MOT

Modern vehicles are increasingly equipped with advanced lighting technologies such as LED headlights, daytime running lights (DRLs), and adaptive lighting systems. The MOT test procedures have been updated to accommodate these technologies. For instance, DRLs are not mandatory to be checked unless they are used in place of dipped beam headlights. LED lights will be checked for operation and brightness, similar to traditional bulbs. The key is that whatever lighting system is fitted to the vehicle, it must be in good working order and meet the required standards.

Frequently Asked Questions (FAQs)

• Q: Do I need to replace all my bulbs if one is out?A: No, you only need to replace the specific bulb that is not working. However, it's often good practice to replace bulbs in pairs (e.g., both brake lights or both indicator bulbs) to ensure consistent brightness and colour, though this isn't a strict MOT requirement for failure.
• Q: What if my aftermarket halo headlights fail the MOT?A: Aftermarket modifications like halo headlights will be tested. If they don't function correctly, are the wrong colour, or obscure the main beam, they could cause a failure. Ensure any modifications are road-legal and properly fitted.
• Q: Can a cracked fog light lens cause an MOT failure?A: Yes, if the crack is significant enough to impair the light's function or if water can ingress into the unit, it can lead to a failure.
• Q: Are daytime running lights (DRLs) tested in an MOT?A: DRLs are generally not tested unless they are the only lights used instead of dipped beam headlights. If fitted, they should be present and correctly functioning, but their operational status isn't a primary test point unless they are the sole source of forward illumination.
• Q: My car has cornering lights, are they tested?A: If your vehicle is fitted with cornering lights, they will be tested for correct operation as part of the MOT. They must illuminate when turning. In conclusion, your car's lighting system is a vital component that is thoroughly assessed during an MOT test. Neglecting to check and maintain your lights can lead to an unexpected failure, potential fines, and, more importantly, compromise your safety on the road. A simple pre-MOT check of all your lights can save a great deal of hassle and ensure you drive away with confidence.

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