Every week, drivers are caught out by MOT failures that could have been avoided.
A blown bulb. A worn tyre. Brake pads that have been squeaking for months.
The good news? Most MOT failures are preventable. Here’s what causes them — and how to make sure your car passes the first time.
What Are the Most Common MOT Failures?
Although the MOT checks multiple safety components, the majority of failures come down to a small number of issues.
Typically, they include:
- Faulty lights
- Worn tyres
- Brake problems
- Suspension or steering faults
- Visibility issues
- Emissions failures
Let’s break these down.
1. Faulty Lights
Lighting faults are one of the most frequent reasons vehicles fail.
Headlights, brake lights, indicators and number plate lights must all be working correctly. Something as simple as a single blown bulb can result in a fail.
It happens more often than you think.
How to avoid it:
Before your MOT, turn on every light and walk around your car. Ask someone to press the brake pedal so you can check the rear lights properly. Replacing a bulb takes minutes. Failing your MOT over it is entirely avoidable.
2. Worn or Damaged Tyres
Tyres must have at least 1.6mm of tread depth across the central three-quarters of the tyre.
Common reasons for failure include:
- Low tread depth
- Uneven wear
- Cracks or bulges in the sidewall
- Incorrect tyre pressure
Tyres are your only contact with the road. If they are worn, your stopping distance increases, especially in wet conditions.
How to avoid it:
Check tread depth regularly and look for visible damage. If you are unsure, have them inspected before your test rather than risking a fail.
3. Brake Issues
Brakes are a critical safety component, so they are carefully assessed during every MOT.
Failures often involve:
- Worn brake pads or discs
- Imbalanced braking
- Fluid leaks
- Reduced braking performance
If your brakes have been squeaking, grinding, or feeling soft, that is not something to ignore.
How to avoid it:
Address warning signs early. Routine servicing will pick up brake wear before it becomes an MOT failure.
If you would like a pre-MOT inspection or repair quote, request one today.
4. Suspension and Steering Faults
Your suspension and steering systems affect stability, control and braking.
Common failures include:
- Worn shock absorbers
- Broken springs
- Excessive movement in steering components
You might notice your car feeling bouncy over speed bumps or pulling slightly to one side. Small signs like these often indicate larger issues developing underneath.
How to avoid it:
If something feels different while driving, have it checked. Catching suspension issues early can prevent both MOT failure and more expensive repairs later.
5. Windscreen, Wipers & Visibility Problems
Visibility issues are another common reason for failing.
This includes:
- Cracks or chips in the driver’s line of sight
- Worn wiper blades
- Washer systems not working
- Damaged or insecure mirrors
Even something minor, like empty washer fluid, can result in a fail.
How to avoid it:
Top up fluids and replace worn wipers before your test. If you have a windscreen chip, get it repaired early before it spreads.
6. Emissions Failures
Modern MOT tests include emissions checks to ensure your vehicle meets environmental standards.
Failures can be caused by:
- Engine management warning lights
- Excessive exhaust smoke
- Faulty catalytic converters
- Poor engine maintenance
If your dashboard warning light is on, your car is unlikely to pass. Simple as that.
How to avoid it:
Do not ignore warning lights. Regular servicing keeps your engine running efficiently and reduces the risk of emissions-related issues.
How Regular Servicing Helps You Pass First Time
Many MOT failures do not happen overnight. They develop gradually.
Routine servicing identifies:
- Brake wear
- Tyre damage
- Fluid leaks
- Suspension faults
- Engine performance issues
When these are addressed early, your MOT becomes far less stressful.
Why MOT Collection Makes Life Easier
For many drivers, the biggest challenge is not the test itself. It is finding the time.
That is why we offer collection and delivery from your home or workplace.
We:
- Collect your vehicle
- Carry out the MOT
- Complete approved repairs if required
- Return your car promptly
No rearranging your day. No waiting around in a garage. It’s never been easier to book your MOT.
Book Your MOT With Confidence
Most MOT failures are preventable with simple checks and regular maintenance.
A few minutes inspecting tyres or lights could save you the inconvenience of a failed test and a retest fee.
If your MOT is approaching, avoid last-minute stress and book with CollectServiceGo today.
You will benefit from:
- Fully qualified technicians
- O.E approved parts where required
- Warranty-safe servicing
- Convenient collection and delivery
Book your MOT now or request a quote for car servicing and MOT today.
