Common MOT Failures and How to Prevent Them
Automotive

Common MOT Failures and How to Prevent Them

MOTS are the annual examination tests that your car must have; it is all about safety and ensuring that the vehicle is fit to be on the road. The tech

Tmp Autos Ltd
Tmp Autos Ltd
7 min read

MOTS are the annual examination tests that your car must have; it is all about safety and ensuring that the vehicle is fit to be on the road. The techs will seek any flaws that may harm your safety or the surroundings. You fail the test, and not only do you have a headache, but you are also wasting money. Understanding why cars often fail will help you prepare your ride in time. A pre-MOT test should identify trouble before it manifests. This tutorial has discussed common traps and provided straightforward solutions to avoid them. 


Lighting & Signalling 

The biggest culprit of failing MOT is the lights. A flat bulb is inexpensive and simple to substitute, yet individuals disregard it. Go ahead, just make sure you turn on all the lights before you go in to take the test. 


You have to check all the outside lights: headlights, taillights, brake lights, turn signals, those side flashers and rear fog lights. 


The point of the headlights must be just right- they will not pass the test even with fresh bulbs when they are not positioned correctly. 


Suspension Component Failures 

The roads in Britain are full of potholes that practically damage bumpers. Over ten per cent of MOTs are failing due to suspension problems nowadays - a large increase from a few years ago. 


The old shocks cause the car to shake and decelerate as you press the brakes. Technicians seek spills or springy rides. Once the dampers fail to contain, they must be changed. 

Rubber bushings become mushy and soft after years and miles. As they tear apart, the suspension may become too mobile, and it scrambles your car tyres out of place. 


Brake System Issues 

Approximately 10% of MOT failures are caused by brake problems. Through frequent maintenance, most brake problems do not arise. A distinct signal is a spongy pedal or a pull to one side. 


Brake pads deteriorate during normal use. A majority require replacements after every 30,000 to 50,000 miles. Their lifespan can be reduced dramatically by your driving style. 

Grooves and scratches are consumed by brake discs. Shallow scratches or excessive rust may fail your vehicle's MOT. The handbrake should remain firm- it should be able to stop the car on steep hills.  


Tyre Condition Problems 

The only car part that comes in contact with the road is the tyres. Inspecting them during the year prevents tyre-related MOT failures. Certain conditions of tyres will automatically condemn you.

 

The tread depth should exceed 1.6 mm in the middle three-quarters of the tyre. A quick depth measure is obtained with the 20p test. In case the outer band remains, change the tyre. 

Damage to the sidewall- cuts, bulges or bare cords result in immediate failure. And no cure that can correct sidewalls. Fitting incorrect tyre sizes on the same axle or having mismatched tyres on the same axle also knocks your vehicle's MOT. 


Visibility and Windscreen Problems. 

Safety on the road requires clear sight in all directions. A common cause of failure is windscreen damage. Cracks or chips that exceed 10mm in size in the driver's view region result in failures. Any damage exceeding 40 mm in the covered area also fails. Resin is used to fix small breaks before they develop into large cracks. Wipers have to remove the glass. Mirrors should provide adequate rear vision. There should be no least one interior or exterior mirror that is working. Mirror glass adhesives are cheap. 


Exhaust Emissions 

There is a gradual rise in emissions failures in particular to diesel cars. The new emissions rules are stricter in comparison with the previous ones. Excessive smoke from diesel engines indicates combustion problems. Carbon buildup in engines causes high emissions readings. A long motorway runs before MOT Coventry tests help clear carbon deposits. 

Pre-MOT fuel additives claim to reduce emissions temporarily. These products clean fuel systems and injectors. Results vary between vehicles and conditions. 


Power Steering Fluid 

The power steering fluid level should always be within the minimum range. Leaked or worn parts can be indicated by low levels of fluid. The fluid checking and topping-up procedure should be done as a preventive maintenance procedure against failures. 

The presence of power steering leaks can be easily identified by puddles under the vehicle. It is important to attend to leaks immediately to avoid damage to the affected parts. High-pressure hoses are most of the time the source of leaks. 


Seat Belts and Airbags 

The seat belts have to retract without any difficulty and also have to lock properly. If the belts are twisted or frayed, they will not pass the MOT test. Strapping up all seat belts will function as a fail-proof measure against failures. Absence of airbags as well as their deployment leads to MOT failures.  


Registration Plates 

The number plates need to be clear and in the right format at all times. Plates that are damaged, faded, or dirty will result in a failure. A simple act of cleaning the plates before the tests can save one from unnecessary troubles. 

The lights for number plates have to properly light the plates at night. If the bulbs are not working or there is corrosion in the fixtures, then that requires fixing. 


Conclusion 

If vehicle owners know the common MOT failures, they will be able to prepare themselves accordingly. It is that simple that a pre-test check can reveal a lot of potential problems. For comprehensive preparation, scheduling an MOT test with a professional pre-car service Coventry check ensures vehicles pass first time whilst identifying issues requiring attention. 

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