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

The Toyota GR Yaris is a popular performance hatchback, but like any car, it can encounter issues that lead to MOT failures. Common problems include lighting and signalling faults, suspension issues, and brake system failures. Each of these can be addressed with varying repair costs, depending on the severity of the issue.
Lighting and Signalling Failures
One of the most frequent reasons for MOT failures in the Toyota GR Yaris is lighting and signalling issues. This includes problems with headlights, brake lights, and indicators. A blown bulb or faulty wiring can lead to an automatic failure during the test.
Replacing a blown bulb is relatively inexpensive, often costing around £10 to £20, including parts and labour. However, if the issue lies within the wiring or the control unit, repairs can escalate to £100 or more. Regular checks of all lights before the MOT can help prevent these failures.
Suspension Problems
Suspension components, such as shock absorbers and springs, are crucial for the vehicle’s handling and comfort. The GR Yaris, known for its sporty performance, can experience wear in these areas, particularly if driven aggressively. MOT testers will check for excessive play or leaks in the suspension system.
Replacing shock absorbers can cost between £150 to £300 per pair, depending on the brand and whether you choose OEM or aftermarket parts. If springs are involved, the cost can increase, especially if a full suspension overhaul is necessary. Keeping an eye on any unusual noises or handling issues can help catch problems early.
Brake System Failures
Brakes are vital for safety, and any faults can lead to an MOT failure. Common issues include worn brake pads, discs, or leaks in the brake fluid system. The GR Yaris, with its performance-oriented design, may experience quicker wear in these components, especially if used on track days or spirited drives.
Replacing brake pads typically costs between £100 to £200, while brake discs can range from £150 to £300. If there are issues with the brake lines or master cylinder, repairs may exceed £500. Regular brake inspections and timely replacements can help maintain performance and safety.
Tyre Condition and Tread Depth
Tyres are another critical area that can lead to MOT failures. The GR Yaris, designed for performance, requires tyres that not only meet legal tread depth requirements but also provide adequate grip. MOT testers will check for tread depth, sidewall damage, and uneven wear.
Replacing tyres can vary significantly in cost, depending on the brand and size, with prices typically ranging from £50 to £150 each. Ensuring tyres are rotated regularly and checking pressures can prolong their lifespan and performance, helping to avoid MOT failures.
Exhaust Emissions and Noise
The GR Yaris is equipped with a sophisticated exhaust system designed to meet emissions standards. However, issues such as a failing catalytic converter or exhaust leaks can lead to increased emissions, resulting in an MOT failure. The noise level of the exhaust is also assessed during the test.
Repairing or replacing a catalytic converter can be costly, often ranging from £300 to £800, depending on the model and parts used. Regular servicing and checks of the exhaust system can help identify potential issues before the MOT.
General Maintenance and Preparation
To minimise the chances of MOT failures, regular maintenance is essential. This includes routine checks of fluid levels, filters, and belts, as well as ensuring all components are functioning correctly. The GR Yaris benefits from a proactive approach to maintenance, which can save money in the long run.
Setting aside a budget for routine servicing, typically costing between £150 to £300 annually, can help keep the car in top condition. Additionally, addressing minor issues as they arise can prevent more significant problems that lead to costly repairs and MOT failures.
Frequently asked questions
What is the Toyota GR Yaris mot history?
The Toyota GR Yaris is a relatively new model, so its MOT history may be limited. You can check the specific vehicle's MOT history online using its registration number.
How often does the Toyota GR Yaris need an MOT?
Like all vehicles in the UK, the Toyota GR Yaris requires an MOT test every 12 months once it is three years old. It's important to keep track of the expiry date.
What are common issues found during the MOT for a Toyota GR Yaris?
Common issues can include worn tyres, faulty lights, and issues with the brakes. Regular maintenance can help prevent these problems.
Can I check the MOT status of a used Toyota GR Yaris?
Yes, you can check the MOT status of any used Toyota GR Yaris by entering its registration number on the official government website. This will show you its current status and any past advisories.
What should I do if my Toyota GR Yaris fails its MOT?
If your Toyota GR Yaris fails its MOT, you will receive a list of issues that need to be addressed. You can then have the necessary repairs done and retest the vehicle.
Is the Toyota GR Yaris reliable for long-term use?
The Toyota GR Yaris is known for its reliability and performance. Regular servicing and maintenance can help ensure it remains in good condition over time.
Are there any specific modifications that could affect the MOT of a Toyota GR Yaris?
Yes, modifications such as changes to the exhaust system or suspension can affect the MOT. It's best to check with a professional to ensure any modifications comply with regulations.
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Sources
DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.