Peugeot 108 MOT failure rates: what to expect
What fails on a Peugeot 108 at MOT, how often, and what each fix typically costs.

The Peugeot 108 is generally a reliable city car, but like any vehicle, it can encounter issues during its MOT. Common failures include problems with lights, brakes, and suspension components. Fixing these issues can vary in cost, but understanding them can help you prepare for your MOT.
Lights and Electrical Issues
One of the most frequent reasons for MOT failures in the Peugeot 108 is faulty lights. This includes issues with headlights, brake lights, and indicators. A blown bulb is a common culprit and can often be replaced for around £10 to £20. However, if the problem lies within the wiring or the switch, costs can escalate to £100 or more.
Regularly checking your lights can prevent these failures. Ensure all bulbs are functioning and that lenses are clean and undamaged. If you notice any flickering or dimming lights, it may indicate a deeper electrical issue that should be addressed before the MOT.
Brake System Deficiencies
The braking system is crucial for safety and is a key area of focus during the MOT. Common failures in the Peugeot 108 include worn brake pads and discs. Replacing brake pads typically costs between £100 and £200, while discs can add another £150 to £300 to your repair bill.
It’s advisable to have your brakes inspected regularly, especially if you notice any grinding noises or reduced braking performance. Keeping an eye on brake fluid levels and ensuring that your brake lights are functioning can also help prevent MOT failures.
Suspension and Steering Problems
Suspension and steering issues are another common reason for MOT failures in the Peugeot 108. Worn shock absorbers or damaged suspension components can lead to a bumpy ride and affect handling. Replacing shock absorbers can cost between £200 and £400, depending on whether you choose to replace them in pairs or all four.
If you experience excessive bouncing or a feeling of instability while driving, it is essential to have your suspension checked. Regular maintenance can help identify issues early, potentially saving you from costly repairs before your MOT.
Tyre Condition and Tread Depth
Tyres are a critical safety component and are often scrutinised during the MOT. The legal minimum tread depth in the UK is 1.6mm, but it is advisable to replace tyres when they reach 3mm for optimal safety. A new tyre can cost anywhere from £50 to £150, depending on the brand and size.
Inspect your tyres regularly for signs of wear, such as uneven tread or bulges. Maintaining proper tyre pressure and ensuring your tyres are correctly aligned can also extend their lifespan and improve your chances of passing the MOT.
Exhaust and Emissions Issues
The exhaust system and emissions are significant factors in the MOT test. Common failures in the Peugeot 108 include leaks in the exhaust system or a malfunctioning catalytic converter. Repairing or replacing a catalytic converter can be quite expensive, ranging from £300 to £800.
To avoid emissions-related failures, ensure your vehicle is serviced regularly. This includes checking the exhaust system for leaks and ensuring the engine is running efficiently. A well-maintained engine will produce fewer emissions and is less likely to fail the MOT.
Windshield and Wiper Failures
The condition of the windshield and wipers is also evaluated during the MOT. A cracked or chipped windscreen can lead to a failure, especially if the damage is in the driver’s line of sight. Repairing minor chips can cost around £50, while replacing a windscreen can range from £200 to £500.
Worn wiper blades can also lead to a failure, with replacement costs typically between £20 and £40. Regularly inspect your windscreen for chips and ensure your wipers are functioning properly to maintain visibility and safety on the road.
Maintaining your Peugeot 108 with regular checks and servicing can significantly reduce the likelihood of MOT failures. By being proactive and addressing common issues, you can ensure a smoother MOT experience and keep your vehicle in top condition.
Frequently asked questions
What is the Peugeot 108 MOT test?
The Peugeot 108 MOT test is an annual assessment required for vehicles over three years old in the UK. It checks that the car meets safety and environmental standards.
How often does my Peugeot 108 need an MOT?
Your Peugeot 108 needs an MOT test every 12 months once it reaches three years of age. It's important to keep track of the expiry date to avoid penalties.
What are common reasons for a Peugeot 108 to fail its MOT?
Common reasons for a Peugeot 108 to fail its MOT include issues with brakes, lights, tyres, and emissions. Regular maintenance can help prevent these problems.
Can I drive my Peugeot 108 if it fails the MOT?
You cannot legally drive your Peugeot 108 if it fails the MOT unless it is being taken to a garage for repairs. You may also face penalties if caught driving without a valid MOT.
How can I prepare my Peugeot 108 for its MOT?
To prepare your Peugeot 108 for its MOT, check the lights, tyres, and fluid levels. It is also advisable to have a qualified mechanic inspect the vehicle beforehand.
What should I do if my Peugeot 108 passes the MOT?
If your Peugeot 108 passes the MOT, you will receive a certificate confirming its roadworthiness. Keep this document safe, as you will need it for future reference.
How can I find a reliable MOT centre for my Peugeot 108?
You can find a reliable MOT centre for your Peugeot 108 by checking online reviews, asking for recommendations from friends, or visiting the official government website for approved garages.
What happens if I miss my Peugeot 108's MOT renewal date?
If you miss your Peugeot 108's MOT renewal date, you cannot legally drive the vehicle until it has passed the test. You may also incur fines or penalties for driving without a valid MOT.
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Sources
DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.