Your Essential MOT Checks Explained

The MOT (Ministry of Transport) test is an annual check that ensures your vehicle meets the minimum safety and environmental standards required by law. It's a crucial part of car ownership, designed to keep you and other road users safe. Many vehicle owners often wonder precisely what goes into this comprehensive inspection. This article will break down the key areas checked during an MOT, providing clarity on what makes a car pass or fail.

Understanding the MOT Test

The MOT test isn't a substitute for regular maintenance, but it is a legal requirement for vehicles over three years old. It assesses whether a car is in a roadworthy condition and meets environmental standards. The test focuses on critical components that affect safety and emissions. It’s important to remember that the MOT doesn't check the mechanical condition of the engine, gearbox, or clutch, as these are generally covered by your regular servicing.

Key Areas of the MOT Test

1. Vehicle Identification Number (VIN)

The tester will first verify that the vehicle's VIN is present, legible, and hasn't been tampered with. This is a fundamental check to ensure the vehicle is what it claims to be.

2. Body and Structure

This section of the MOT looks for significant corrosion or damage to the vehicle's bodywork. Key areas checked include:

• Chassis: Any signs of excessive rust or damage that could compromise structural integrity.
• Body Panels: Significant dents, sharp edges, or missing panels that could pose a hazard.
• Doors: Proper opening and closing mechanisms, and the condition of the door catches.
• Bonnet and Boot: Secure latches and the ability to open and close them safely.
• Seats: Securely fitted front seats.
• Seatbelts: Proper functioning and condition of all seatbelts, including pre-tensioners and any warning lights.
• Mirrors: Condition and security of all mirrors.
• Windscreen: Any chips or cracks in the driver's line of sight that are larger than 10mm or within a 2.5cm radius of the steering wheel.
• Wipers and Washers: Adequate operation to clear the windscreen.
• Horn: Proper function and suitability for use.

3. Fuel System

The MOT checks for leaks in the fuel system and ensures the fuel cap is present and can be securely fastened.

4. Steering and Suspension

This is a critical area for vehicle safety. The tester will examine:

• Steering: Excessive play in the steering wheel, condition of steering components, and proper operation.
• Suspension: Wear and tear on suspension components such as springs, shock absorbers, and arms. Any leaks from shock absorbers will also result in a fail.
• Wheel Bearings: Excessive play in wheel bearings.

5. Wheels and Tyres

Tyres are vital for road safety. The MOT checks:

• Tyre Tread Depth: A minimum of 1.6mm of tread across the central three-quarters of the tyre's width.
• Tyre Condition: No cuts, bulges, or damage that could compromise safety.
• Tyre Pressure: While not directly tested, incorrect tyre pressures can affect handling and wear.
• Wheel Condition: Any damage or corrosion to the wheels that could affect their integrity.
• Tyre Type: Tyres must be the correct type and size for the vehicle.

6. Brakes

Perhaps the most critical safety component. The MOT involves a rigorous brake test:

• Brake Performance: Checks the efficiency of the braking system, ensuring it meets minimum performance standards.
• Brake Fluid: The level and condition of the brake fluid are checked.
• Brake Lines and Hoses: Condition and security of all brake lines and hoses, looking for leaks or corrosion.
• Handbrake: Proper operation and holding power.
• ABS Warning Light: The Anti-lock Braking System warning light should illuminate and then go out when the engine is started.

7. Exhaust Emissions

This checks your car's environmental impact:

• Exhaust Emissions: The vehicle must meet the exhaust emission standards for its age and fuel type. This is tested using a gas analyser.
• Exhaust System: The exhaust system must be complete, secure, and free from leaks.

8. Lighting Equipment

All lights on the vehicle are tested for:

• Headlights: Proper functioning, aim, and condition.
• Brake Lights: Correct operation.
• Indicator Lights: Proper flashing and visibility.
• Tail Lights: Correct illumination.
• Number Plate Lights: Illumination and condition.
• Reflectors: Condition and presence.

9. Other Checks

Several other important areas are covered:

• Engine: While the internal mechanicals aren't tested, the engine must not leak oil excessively.
• Gearbox: No leaks from the gearbox.
• Clutch: No excessive play in the clutch pedal.
• Speedometer: Must be present and functioning.
• Fuel Cap: Must be present and secure.
• Battery: Securely mounted.
• Doors: Must open and close from the outside.
• Seats: Front seats must be securely fitted.
• Child Seat Anchorages: Where fitted, these must be in good condition.
• Airbags: The airbag warning light must function correctly.
• Towbars: If fitted, they are checked for condition and security.

MOT Test Categories

During the test, components are categorised into one of three types of defects:

What Happens If My Car Fails?

If your car fails its MOT, the tester will provide you with a 'refusal of an MOT test certificate' detailing the reasons for failure. You will need to get the necessary repairs done. Once the repairs are completed, you can usually have a partial re-test without charge, provided you leave the vehicle at the test centre or bring it back within 10 working days.

Frequently Asked Questions (FAQs)

Q1: Does an MOT check the engine?

A1: No, an MOT does not check the mechanical condition of the engine, gearbox, or clutch. These are typically covered by your car's regular servicing.

Q2: Can I drive my car if it fails its MOT?

A2: You can drive your car if it fails its MOT only if the existing MOT certificate is still valid and you are taking it for repair or to a pre-booked MOT test appointment. Driving with an expired MOT certificate is illegal.

Q3: What is the minimum tyre tread depth for an MOT?

A3: The minimum legal tyre tread depth for an MOT test is 1.6mm across the central three-quarters of the tyre's breadth.

Q4: How long is an MOT certificate valid for?

A4: An MOT certificate is typically valid for 12 months from the date of the test. However, if your car is due its first MOT, it will be valid from the date it is registered until its first test.

Q5: What if my car's hazard warning light comes on during the MOT?

A5: If your car's hazard warning light stays on after the engine is started, it may indicate a fault with a system that requires this warning light, such as an airbag or ABS system, and could result in a fail.

Understanding the specifics of the MOT test can help you prepare your vehicle and avoid unexpected failures. Regular checks and prompt attention to any issues identified will ensure your car remains safe and compliant with legal requirements. Don't forget that a clean MOT is a testament to a well-maintained vehicle and contributes significantly to road safety.