Subaru Impreza MOT failure rates: what to expect

What fails on a Subaru Impreza at MOT, how often, and what each fix typically costs.

Subaru Impreza
Image via Wikipedia, CC-licensed.

The Subaru Impreza is a popular choice among UK drivers, but like any vehicle, it can encounter issues that may lead to MOT failures. Common problems include suspension issues, emissions failures, and brake system faults. Addressing these issues can vary in cost, but understanding them can help you prepare for your MOT.

Suspension Problems

Suspension issues are among the most frequent reasons for MOT failures in the Subaru Impreza. Worn-out shock absorbers or damaged springs can lead to poor handling and excessive wear on tyres. If your vehicle fails due to suspension problems, you can expect repair costs to range from £150 to £400, depending on the extent of the damage and whether parts need replacing.

Regular maintenance can help prolong the life of your suspension components. Look out for signs such as unusual noises when driving over bumps or a bouncy ride, which can indicate that your suspension needs attention. Addressing these issues early can save you money in the long run.

Emissions Failures

Emissions failures are another common issue that can lead to an MOT failure for the Subaru Impreza. Problems with the exhaust system, including a faulty catalytic converter or worn-out oxygen sensors, can result in higher emissions than allowed. Repair costs for emissions-related failures can vary significantly, typically ranging from £200 to £1,000, depending on the parts that need replacing.

To avoid emissions-related issues, ensure that your vehicle’s exhaust system is regularly checked and maintained. Keeping the engine in good condition and using quality fuel can also help reduce emissions and improve overall performance.

Brake System Faults

Brake system faults are critical issues that can lead to an MOT failure. Common problems include worn brake pads, damaged discs, or issues with the brake lines. The cost of repairing brake system faults can range from £100 for a simple brake pad replacement to over £500 for more extensive repairs involving the brake discs and lines.

It is essential to monitor your braking performance regularly. If you notice any unusual noises, vibrations, or a decrease in braking efficiency, it is crucial to have your brakes inspected promptly. Regular maintenance can help ensure your brake system remains in good working order.

Tyre Condition

Tyre condition is a significant factor in MOT testing, and the Subaru Impreza is no exception. Worn or damaged tyres can lead to a failed MOT. The legal minimum tread depth in the UK is 1.6mm, and replacing tyres can cost anywhere from £50 to £150 each, depending on the brand and size.

To maintain good tyre condition, regularly check the tread depth and look for any signs of damage, such as bulges or cuts. Proper inflation and regular rotations can also help extend the life of your tyres, ensuring they perform well and keep you safe on the road.

Lighting and Signalling Issues

Lighting and signalling issues are another common cause of MOT failures for the Subaru Impreza. Faulty bulbs, broken lenses, or issues with the wiring can lead to problems during testing. The cost to replace bulbs is relatively low, usually around £10 to £30, but more extensive electrical issues can lead to higher repair costs.

Regularly inspecting your vehicle’s lights can help prevent failures. Ensure that all lights are functioning correctly, including headlights, brake lights, and indicators. If you notice any dimming or flickering, it may be time to replace the bulbs or check the wiring.

Bodywork and Structural Integrity

While less common, bodywork and structural integrity issues can also lead to MOT failures. Rust, corrosion, or damage to the chassis can be problematic. Repair costs for bodywork can vary widely, from £100 for minor repairs to several hundred pounds for more extensive rust treatment or structural repairs.

Keeping your Subaru Impreza clean and protected from the elements can help prevent rust and corrosion. Regular inspections of the bodywork can help identify any issues early, allowing for timely repairs and maintaining the vehicle’s overall integrity.

By being aware of these common MOT failures and their associated costs, Subaru Impreza owners can take proactive steps to ensure their vehicles remain roadworthy and compliant with UK regulations. Regular maintenance and inspections can help prevent costly repairs and keep your car in excellent condition.

Frequently asked questions

What is an MOT for a Subaru Impreza?

An MOT is a mandatory annual test for vehicles in the UK, including the Subaru Impreza, to ensure they meet safety and environmental standards.

How often does my Subaru Impreza need an MOT?

Your Subaru Impreza needs an MOT test every 12 months once it is three years old. It is important to keep track of the expiry date.

What are common reasons for Subaru Impreza MOT failures?

Common reasons for MOT failures include issues with brakes, lights, emissions, and tyre condition. Regular maintenance can help prevent these problems.

Can I drive my Subaru Impreza if the MOT has expired?

No, you cannot legally drive your Subaru Impreza on public roads if the MOT has expired, unless you are driving it to a pre-booked MOT appointment.

How can I prepare my Subaru Impreza for its MOT?

To prepare, check the lights, brakes, tyres, and fluid levels. It is also a good idea to ensure the windscreen wipers and mirrors are in good condition.

Where can I get an MOT for my Subaru Impreza?

You can get an MOT for your Subaru Impreza at any authorised MOT testing centre. Many garages offer this service, so you can choose one that is convenient for you.

What should I do if my Subaru Impreza fails its MOT?

If your Subaru Impreza fails its MOT, you will receive a list of issues that need to be fixed. You can have the repairs done at the same garage or another one before retesting.

Is there a grace period for renewing my Subaru Impreza's MOT?

There is no official grace period for renewing an MOT. It is best to renew it before the expiry date to avoid any legal issues.

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Sources

DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.