Ensuring your vehicle passes its MOT (Ministry of Transport) test on the first attempt saves you time, money, and keeps you safely on the road. However, many vehicles fail the MOT due to common issues that are often easily preventable. This comprehensive guide explores the most frequent MOT failure points and offers practical advice on how to address these issues before the test.
1. Lighting and Signalling Issues
Common Failures:
- Faulty Bulbs: Non-functioning headlights, brake lights, indicators, or rear lights.
- Incorrect Alignment: Headlights not correctly aligned, causing poor illumination or dazzling other drivers.
- Damaged Lenses: Cracked or discoloured light lenses reducing effectiveness.
How to Avoid:
- Regular Checks: Test all lights weekly. Enlist someone to help check brake lights and reverse lights.
- Replace Faulty Bulbs: Carry spare bulbs and replace any that are dimming or have burnt out.
- Clean and Inspect Lenses: Keep light covers clean and replace any that are damaged.
2. Tyre Condition
Common Failures:
- Insufficient Tread Depth: Tyres with a tread depth below the legal minimum of 1.6mm.
- Damage: Cuts, bulges, or objects embedded in the tyre.
- Incorrect Tyre Type: Mismatched tyres or inappropriate tyres for the vehicle.
How to Avoid:
- Tread Depth Check: Use a tread depth gauge to ensure all tyres meet the minimum requirement.
- Visual Inspection: Regularly inspect tyres for damage or foreign objects.
Correct Tyres: Ensure tyres are suitable for your vehicle and axle load.
3. Brake System Faults
Common Failures:
- Brake Imbalance: Uneven braking force across wheels, affecting vehicle stability.
- Worn Brake Pads or Discs: Excessive wear reducing braking efficiency.
- Brake Fluid Leaks: Leaking brake fluid compromising brake performance.
How to Avoid:
- Regular Servicing: Have brakes inspected during routine maintenance.
- Listen for Noises: Squealing or grinding sounds may indicate worn components.
Brake Fluid Check: Monitor fluid levels and look for signs of leaks under the vehicle.
4. Suspension and Steering Issues
Common Failures:
- Worn Shock Absorbers: Causing poor handling and vehicle instability.
- Damaged Springs: Broken or corroded suspension springs.
- Steering Play: Excessive free movement in the steering wheel.
How to Avoid:
- Bounce Test: Press down on each corner of the vehicle; it should settle quickly without excessive bouncing.
- Listen and Feel: Be aware of unusual noises or handling issues when driving.
Professional Inspection: Have a mechanic check the suspension and steering components if you notice any concerns.
5. Driver’s View Obstructions
Common Failures:
- Windscreen Damage: Chips or cracks larger than 10mm in the driver's line of sight or 40mm elsewhere.
- Worn Wiper Blades: Ineffective clearing of the windscreen.
- Obstructions: Items hanging from the rear-view mirror or stickers obstructing the view.
How to Avoid:
- Windscreen Repair: Fix chips or cracks promptly to prevent them from worsening.
- Replace Wiper Blades: If they leave streaks or make noise, it's time for new ones.
Clear the Dashboard: Remove any objects or devices that block the view.
6. Exhaust and Emissions Problems
Common Failures:
- Excessive Emissions: Vehicle exceeds legal emission limits.
- Leaking Exhaust: Holes or corrosion causing leaks.
- Missing Components: Catalytic converter or diesel particulate filter (DPF) removed or tampered with.
How to Avoid:
- Pre-MOT Emissions Test: Have emissions checked, especially for older vehicles.
- Regular Servicing: Maintain the engine and exhaust system.
- Avoid Short Trips: Diesel vehicles benefit from longer drives to clear the DPF.
7. Registration Plate Issues
Common Failures:
- Illegible Plates: Faded, dirty, or damaged plates making characters unreadable.
- Incorrect Format: Non-standard fonts, spacing, or illegal styling.
- Missing Plates: Front or rear plate missing.
How to Avoid:
- Clean Plates: Keep them clean and legible.
- Correct Plates: Ensure plates comply with legal standards, including font and spacing.
Secure Attachment: Make sure plates are firmly attached.
8. Seatbelt Defects
Common Failures:
- Damaged Belts: Fraying, cuts, or excessive wear.
- Non-Functional Mechanisms: Belts that don't retract or latch properly.
- Missing Belts: Seatbelts removed or not present where required.
How to Avoid:
- Inspect Belts: Regularly check for signs of wear or damage.
- Test Mechanisms: Ensure belts latch securely and retract smoothly.
Replace as Needed: Install new seatbelts if any issues are found.
9. Fuel and Exhaust Leaks
Common Failures:
- Fuel Leaks: Petrol or diesel leaks posing a fire hazard.
- Exhaust Leaks: Fumes entering the vehicle or escaping before the exhaust system.
How to Avoid:
- Visual Inspection: Look under the vehicle for wet spots or stains.
- Smell Test: Be alert to the smell of fuel or exhaust fumes.
- Professional Repair: Address any leaks immediately with a qualified mechanic.
10. Problems with Mirrors
Common Failures:
- Missing Mirrors: Exterior mirrors not present where required.
- Damaged Mirrors: Cracked or broken mirror glass impairing visibility.
- Loose Fittings: Mirrors not securely attached.
How to Avoid:
- Check All Mirrors: Ensure rear-view and side mirrors are intact and clean.
- Secure Mounts: Tighten any loose fittings.
Replace Damaged Mirrors: Install new mirrors if glass is cracked or missing.
11. Faulty Horn
Common Failures:
- Non-Functional Horn: Horn doesn't emit sound when activated.
- Inadequate Volume: Horn not loud enough to be effective.
How to Avoid:
- Test the Horn: Regularly check that the horn works.
Repair or Replace: Fix any electrical issues or replace the horn if necessary.
12. Inoperative Electrical Equipment
Common Failures:
- Battery Issues: Battery not securely mounted or terminals corroded.
- Electrical Faults: Wiring problems causing intermittent failures.
How to Avoid:
- Battery Check: Ensure the battery is firmly secured and connections are clean.
Professional Diagnosis: Have electrical systems inspected if you notice any irregularities.
13. Fluid Levels and Leaks
Common Failures:
- Low Brake Fluid: Insufficient brake fluid affecting braking performance.
- Power Steering Fluid Leaks: Leaks reducing steering effectiveness.
How to Avoid:
- Monitor Fluid Levels: Regularly check brake, power steering, coolant, and oil levels.
- Look for Leaks: Inspect under the vehicle for any signs of fluid leakage.
Top Up as Needed: Use manufacturer-recommended fluids to top up levels.
14. Steering Lock Issues
Common Failures:
- Faulty Steering Lock: Lock not engaging or disengaging properly.
- Ignition Problems: Key not turning smoothly or getting stuck.
How to Avoid:
- Test Functionality: Check that the steering lock engages when the key is removed.
- Lubricate Locks: Use appropriate lubricants to ensure smooth operation.
Professional Service: Address any issues with a qualified technician.
15. Issues with Doors and Seat Security
Common Failures:
- Faulty Door Latches: Doors not closing or staying closed.
- Loose Seats: Seats not securely fixed to the vehicle.
How to Avoid:
- Inspect Doors: Ensure all doors open and close properly from inside and outside.
- Check Seats: Verify that seats are firmly attached and seat adjustments lock in place.
Repair Faults: Fix any latch or seat issues before the MOT test.
General Tips to Avoid MOT Failures
Regular Maintenance
- Service Schedule: Adhere to your vehicle’s recommended service intervals.
- Professional Inspections: Have your vehicle inspected by professionals, like those at H & A MOT Testing Centre, especially before the MOT.
Pre-MOT Checklist
- Self-Assessment: Use a checklist to go through common failure points.
- Address Minor Issues: Fix small problems promptly to prevent them from becoming major issues.
Stay Informed
- Updates on Regulations: Keep abreast of any changes in MOT requirements.
Manufacturer Recalls: Ensure any recall work has been completed.
Why Choose H & A MOT Testing Centre
At H & A MOT Testing Centre, we are committed to helping you keep your vehicle roadworthy. Our experienced technicians provide:
- Comprehensive Pre-MOT Checks: Identifying potential issues before the official test.
- Expert Repairs: Offering solutions for any problems found.
- Affordable Pricing: Competitive rates for MOT tests and related services.
Friendly Service: A customer-focused approach ensuring you feel confident and informed.
Book Your MOT Test Today
Avoid the stress and inconvenience of a failed MOT by preparing your vehicle in advance. Contact H & A MOT Testing Centre to schedule your MOT test or for a pre-test inspection.
Contact Information:
- Address: Unit 5 Clarendon Business Park, Oakland Road, Leicester, LE2 6AP
- Phone: +44 116 429 3528
- Email: info@motinleicester.com
Website:www.motinleicester.com
Understanding the common reasons for MOT failures empowers you to take proactive steps in maintaining your vehicle. Regular checks and timely repairs not only increase the likelihood of passing the MOT but also enhance your safety and that of other road users. Trust H & A MOT Testing Centre in Leicester for all your MOT testing and vehicle maintenance needs.
