Introduction
The Ministry of Transport (MOT) test is a mandatory annual inspection for vehicles in the UK that ensures roadworthiness, safety, and compliance with environmental standards. One of the crucial components examined during an MOT test is the suspension system, which plays a significant role in vehicle handling, comfort, and stability. Understanding what aspects of your suspension need checking before the test can help you avoid failure and costly repairs. In this guide, we will walk you through the essential suspension checks to perform before taking your vehicle for its MOT.
Importance of Suspension in an MOT Test
The suspension system is fundamental to vehicle safety and performance. It absorbs shocks from the road, ensuring a smoother ride, and maintains tyre contact with the road surface, which is essential for steering and braking control. A faulty suspension can lead to uneven tyre wear, poor handling, and increased stopping distances, making it a serious safety concern. Since suspension issues can lead to an MOT failure, it is vital to inspect key components before the test.
What to Check Before an MOT Test
1. Visual Inspection of Suspension Components
- Check the shock absorbers for leaks, damage, or excessive wear. Any oil leakage or corrosion could indicate a failing component.
- Inspect springs for cracks or breaks. A broken spring can significantly affect ride quality and vehicle balance.
- Look for damage to the control arms and wishbones, ensuring they are securely attached and not excessively worn.
- Examine the anti-roll bars and linkages, as loose or broken connections can result in poor handling.
2. Bounce Test for Shock Absorbers
- Press down firmly on each corner of the vehicle and release it.
- If the car bounces more than twice before settling, the shock absorbers may be worn out and need replacing.
3. Steering and Handling Performance
- If your vehicle pulls to one side or feels unstable when driving, it could indicate issues with the suspension or wheel alignment.
- Pay attention to any knocking or clunking noises, which may suggest worn-out suspension joints or bushes.
4. Tyre Condition and Wear Patterns
- Uneven tyre wear can be a sign of suspension misalignment or faulty components.
- Check tyre pressure and ensure that the tread depth meets the UK legal requirement of at least 1.6mm.
5. Wheel Bearings and Joints
- Excessive play in wheel bearings or suspension joints can lead to instability and may cause an MOT failure.
- Listen for grinding or humming noises while driving, as these could indicate worn wheel bearings.
6. Suspension Bushes and Mounts
- Inspect rubber bushes for cracks, excessive movement, or deterioration, as they provide cushioning and prevent metal-on-metal contact.
- Ensure that mounts holding suspension components in place are secure and not corroded.
7. Hydraulic and Electronic Suspension Systems (If Applicable)
- Some vehicles feature hydraulic or electronically controlled suspension. Check for error messages on the dashboard and fluid leaks from hydraulic systems.
- Ensure sensors and actuators are functioning correctly to prevent performance issues.
Conclusion
Checking your vehicle’s suspension before an MOT test is a proactive way to ensure it passes without unnecessary repairs. The suspension system is crucial for maintaining stability, control, and comfort, and any issues should be addressed promptly to enhance road safety. By performing the above checks, you can identify potential problems early and increase your chances of a successful MOT test.
Disclaimer
This article provides general guidance on checking suspension components before an MOT test but does not replace professional mechanical advice. If you are unsure about any issues, it is advisable to consult a qualified mechanic to assess and repair your vehicle properly.
(FAQs)
1. What happens if my car fails its MOT due to suspension issues?
If your car fails its MOT because of suspension faults, you will receive a ‘major’ or ‘dangerous’ fault notice. You must repair the issue before legally driving the vehicle again. Some garages offer free re-tests within a certain period after repairs are completed.
2. How much does it cost to fix suspension problems before an MOT?
The cost varies depending on the specific issue. Replacing shock absorbers can cost between £100-£300 per pair, while suspension bushes or control arms may range from £50 to £500, including labour. Always get a quote from a trusted mechanic.
3. Can I drive with a worn suspension if my car still passes its MOT?
Even if your vehicle passes the MOT, a worn suspension can impact safety and driving comfort. It is advisable to fix any issues as soon as possible to ensure optimal vehicle performance and safety.