DIY pre-MOT checklist: what to fix before the test

Preparing your vehicle for an MOT can save you time and money. By conducting a DIY pre-MOT checklist, you can identify and fix common issues that often lead to failures. This guide covers essential checks you can perform at home to help ensure your vehicle passes the test without the need for a retest fee.

Check the lights

One of the most common reasons for MOT failures is faulty lights. Ensure that all exterior lights are functioning correctly, including headlights, brake lights, indicators, and fog lights.

Start by turning on your vehicle and checking each light individually. Ask a friend to help by standing outside the car to confirm that all lights are operational. Replace any blown bulbs with the correct type, which can usually be found in your vehicle’s manual. Remember that headlights should be properly aligned to avoid dazzling other drivers.

Inspect the tyres

Tyres are crucial for safety and performance, and they must meet specific legal requirements. Check the tread depth, which should be at least 1.6mm across the central three-quarters of the tyre.

Use a tread depth gauge or the 20p test: insert a 20p coin into the tread; if the outer band of the coin is visible, your tread is too shallow. Also, inspect the tyres for any signs of damage, such as cuts or bulges. Ensure that all tyres, including the spare, are inflated to the recommended pressure, which can be found in your vehicle’s manual or on a sticker inside the driver’s door.

Test the windscreen wipers and washers

Effective windscreen wipers are essential for clear visibility, especially in adverse weather conditions. Check the condition of the wiper blades for any signs of wear or damage.

If the blades are frayed or not making proper contact with the windscreen, replace them. Additionally, ensure that your windscreen washer fluid reservoir is full and that the washers are functioning correctly. If the washers are clogged, clean them out to ensure a clear spray.

Examine the exhaust system

A well-functioning exhaust system is vital for both performance and emissions. Start by inspecting the exhaust for any visible signs of damage, such as rust or holes.

Listen for any unusual noises while the engine is running, which may indicate a leak. If you notice any issues, it may be worth consulting a professional. Remember that an exhaust system in poor condition can lead to increased emissions, which could result in a failed MOT.

Check the brakes

Brakes are a critical safety feature, and any issues should be addressed before the MOT. Start by checking the brake fluid level; it should be between the minimum and maximum marks on the reservoir.

Next, test the brakes by pressing the pedal. It should feel firm and not sink to the floor. If you notice any unusual noises when braking, such as grinding or squeaking, this may indicate worn brake pads or discs. It is advisable to have any concerns checked by a qualified mechanic.

Review the dashboard warning lights

Dashboard warning lights can indicate potential issues that could lead to an MOT failure. Before your test, start your vehicle and check that all warning lights illuminate when the ignition is on, then turn off.

If any warning lights remain illuminated after the engine starts, investigate the issue further. Common warnings include those for the engine, brakes, and airbag systems. Addressing these issues before the MOT can help ensure a smoother testing process and avoid unexpected failures.