An MOT failure isn’t just annoying. It can also be expensive, time consuming, and stressful. The worst part? Most MOT fails happen because of small issues. It is easy to remedy these issues with an early detection. The positive thing is that it is possible to prevent most of these issues by making a couple of checks at home.
Doing these checks can save you money and effort. You don’t need to be a car expert. You only need basic tools and a bit of attention. Below are 10 practical tips shared by motor experts. Class 4 MOT test centre help your car pass the MOT and stay safe on the road.
1. Check All Lights and Indicators in Advance
Lights go out over time, but most people don’t notice. You only realize it when you fail the test. So, take five minutes and check every light. Activate your headlights, brake lights, fog lights and indicators. Request someone you know to walk around the vehicle and you pedal down. If no one is around, park near a wall and use the reflection.
Don’t just look for lights that are off. Replace any light that flickers or looks dim. It’s a cheap fix, and bulbs are easy to change yourself. Keeping all lights working is a quick win for your MOT.
2. Inspect Tyres for Tread, Pressure, and Damage
Your tyres are the only thing that touch the road. If they are worn out or damaged, it’s a serious problem. You need to check three things: tread depth, tyre pressure, and the tyre walls. The legal tread depth is 1.6mm in the middle of the tyre. Use a 20p coin to check. If you can see the border of the coin, your tread is too low. Then go to a petrol station or use tyre pressure gauge. Ensure that all tyres are inflated to the right pressure as well as the spare tyre in the event that you have a spare tyre. As well as the cuts, cracks or bulges should be examined. Worn out tyres do not only become an MOT problem but they are also hazardous. Probably, seek the second opinion of some local tyre shop in case you are not convinced.
3. Make Sure Your Brakes Are Smooth and Responsive
When was the last time you thought about your brakes? Many people only notice them when they make noise or feel weak. That’s already a warning sign. Before your MOT, take the car for a short drive. Test the brakes. They should stop the car evenly without pulling to one side. The pedal should feel firm and not sink too low.
Listen for strange noises. Grinding, squeaking, or screeching could mean worn-out brake pads or discs. Also test the handbrake. Park on a hill and make sure it holds the car still. If it rolls or feels loose, it needs adjustment. Brakes are a major safety issue, so don’t ignore them. If you’re not sure, get a mechanic to take a quick look.
4. Top Up Your Fluids: Oil, Coolant, and Washer Fluid
Low fluid levels can cause an MOT fail, and it’s easy to avoid. Check your oil, coolant, and screen wash. Open the bonnet and check each cap. Look at the oil level with the dipstick. Make sure it’s in the safe zone. Check the coolant tank to see it’s topped up, and that the fluid isn’t cloudy or dark. Washer fluid is simple but important. Some cars fail just because it’s empty. Fill it with ready-mixed washer fluid – not plain water.
Also, notice the smell and color of the fluids. Bad smells or odd colors could mean bigger problems, like oil leaks or engine issues. These signs are worth checking out before the test.
5. Check the Windscreen and Wipers
Your windscreen must give you a clear view. Small chips or cracks might not seem like a big deal, but they can lead to failure. Check for cracks in the driver’s view. If it’s over 10mm, it’s a problem. Anywhere else, cracks over 40mm are also a fail.
Now check the wipers. Turn them on and watch. If they skip, smear, or leave streaks, they need replacing. Wiper blades are cheap and easy to fit. Don’t forget the rear wiper if you have one. Also make sure the washer jets spray evenly and clearly. Your visibility matters. A good windscreen and working wipers help both you and your examiner.
6. Make Sure Mirrors and Number Plates Are Secure
Mirrors must be in place, clear, and not cracked. That includes the rear-view mirror and both side mirrors. Wobbly mirrors are not okay. Fix them tightly so they don’t shake while driving. Number plates should be clean and easy to read. Make sure no dirt covers the letters and that the bolts aren’t rusted.
Spacing between letters must also follow rules. Don’t use fancy fonts or stickers. If a digit is missing, faded, or loose, it’s an instant fail. Before your test, grab a cloth and give the plates a quick clean. A few seconds could save your test.
7. Test Your Horn, Seat Belts, and Warning Lights
Start inside the car. Press the horn. It should be loud and clear. A silent or weak horn is not allowed. Now check all seat belts. Pull them out fully and let them snap back. They should lock in place, pull out smoothly, and retract without effort. Look closely for any signs of fraying or damage.
Start the engine and look at the dashboard. Warning lights should turn off after a few seconds. If anything stays on – like the airbag, ABS, or engine light – you’ll need to fix it. A diagnostics check can help you find the issue. Many garages offer this service quickly and at a low cost.
8. Clean the Inside and Clear Your Dashboard
Your car doesn’t need to be spotless, but it should be neat. Remove any clutter from the dashboard and the footwells. Loose objects can block access or distract the tester. A clean interior also shows that you care about your car.
Remove air fresheners hanging from mirrors. They can block your view, which is a problem during the test. Wipe down surfaces. Clear away rubbish. Make it easy for the tester to do their job. A tidy car leaves a good impression.
9. Look for Leaks or Strange Engine Sounds
Before test day, park your car on a clean surface for a few hours. Then check for puddles under the engine area. Any signs of oil, brake fluid, or coolant leaks need attention. A dripping car could mean failing the test or worse, a breakdown later.
Start the engine and listen. Are there odd sounds like ticking, knocking, or whistling? These might be small issues now but can get worse later. You don’t need to be a mechanic to notice when something sounds wrong. Trust your ears. A quick check now can prevent a bigger problem later.
10. Fix Any Dashboard Lights Before the Test
Have you been ignoring a warning light? Many people do. But that one small light could fail your MOT. Common lights that cause problems include the engine check light, battery light, airbag light, and tyre pressure warning. These lights come on for a reason. Don’t assume they’ll go away on their own.
Visit a garage or use an OBD scanner tool. Some faults are small and easy to clear. But waiting until the test can lead to failure or extra charges. Be proactive. Sort out dashboard lights ahead of time to keep your MOT stress-free.
Final Thoughts: Be Ready, Not Sorry
MOTs aren’t meant to scare drivers. They exist to keep cars safe. And the truth is, most fails are avoidable. Spend just 30 to 45 minutes doing these checks a few days before your test. Fix anything small while there’s still time.
You don’t need to be a mechanic. All you need is some care and attention. Lights, tyres, fluids, mirrors, and warning lights – keep them in check. Doing this not only helps you pass the MOT but also keeps your car safer and more reliable all year long. Don’t leave it to chance. Stay prepared. Drive with confidence. Pass your MOT the smart way.
