MOT failure rates

Toyota Prius MOT failure rates: what to expect

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

Updated 4th September 2026 DVSA data: Across 162,575 recorded MOT tests, 13.3% failed.

Toyota Prius
Image via Wikipedia, CC-licensed.

The Toyota Prius is generally a reliable vehicle, but certain issues can lead to MOT failures. Common problems include worn brakes, suspension issues, and lighting faults. Fixing these issues can range from minor repairs to more significant expenses, depending on the severity of the problem.

Brake System Failures

One of the most frequent reasons for MOT failures in the Toyota Prius is related to the brake system. This includes worn brake pads, discs, or issues with the brake lines.

If the brake fluid is contaminated or the brake lines are corroded, this could also lead to a failure.

Suspension Problems

Suspension issues are another common MOT failure point for the Prius. Worn shock absorbers or damaged suspension components can lead to a bumpy ride and handling problems.

Regular maintenance can help prevent these issues, but if they do arise, prompt attention is essential for safety and performance.

Lighting and Electrical Failures

Lighting faults are a common cause of MOT failures across many vehicles, including the Toyota Prius. Issues can range from blown bulbs to more complex electrical problems.

Regular checks of your lights can help catch these issues before the MOT.

Exhaust Emissions

The Toyota Prius is designed to be environmentally friendly, but exhaust emissions can still lead to MOT failures. Common issues include a faulty catalytic converter or exhaust leaks.

If your Prius fails the emissions test, it is advisable to have a qualified technician assess the exhaust system to identify the specific issue. Regular servicing can help maintain the system and reduce the likelihood of failure.

Tyre Condition and Tread Depth

Tyres are crucial for safety and performance, and they are a common MOT failure point. The legal minimum tread depth in the UK is 1.6mm, but it is advisable to replace tyres well before they reach this limit.

Additionally, uneven wear or damage to the sidewalls can also lead to MOT failures. If your tyres are found to be below the legal limit or damaged, replacing them promptly is essential. Regular checks and rotations can help prolong tyre life and maintain safety.

Windshield and Wiper Issues

The condition of the windshield and wipers can also impact the MOT outcome. A cracked or chipped windscreen can lead to a failure, especially if the damage is in the driver’s line of sight.

Worn wiper blades are another common issue that can lead to a failure. Keeping your windshield and wipers in good condition is essential for visibility and safety, especially during adverse weather conditions.

By staying informed about these common issues and their associated costs, Toyota Prius owners can better prepare for their MOT and ensure their vehicle remains roadworthy. Regular maintenance and timely repairs can help prevent these common failures and keep your Prius running smoothly.

Toyota Prius recall record

26 recalls have been issued for the Toyota Prius, between 2005 and 2026.

  1. Relay and Wire Harness installation on certain Prius

    R/2026/027

    Issued 16 March 2026

    For affected vehicles that are equipped with an electric rear door lock system which includes a door opener switch and a rear door lock release actuator If the seal performance for this switch is reduced this can temporarily allow water to enter the switch which can cause the switch to activate and the door could open unexpectedly.

    Remedy:Installation of relay and wire harness.

    Affects cars built Feb 2023 to Nov 2025

  2. INCORRECT PROGRAMMING IN RELATION TO TRANSMISSION SHIFT POSITION STATUS MIGHT CAUSE HYBRID SYSTEM TO SHUT DOWN

    R/2021/332

    Issued 18 October 2021

    Due to incorrect programming the hybrid vehicle ECU can incorrectly determine that the validation signal is erroneous for the shifter position

    Remedy:Reprogram the Hybrid ECU.

    Affects cars built May 2021 to Jul 2021

  3. THE PRE-CRASH BRAKE ASSIST FUNCTION CAN BE DELAYED

    R/2021/260

    Issued 9 August 2021

    The pre-crash brake assist function can be delayed.

    Remedy:Reprogram the Brake booster assembly with master cylinder ECU.

    Affects cars built Aug 2020 to May 2021

  4. UNDER CERTAIN CIRCUMSTANCES THE HYBRID UNIT MAY SHUT DOWN AND CAUSE LOSS OF MOTIVE POWER

    R/2020/190

    Issued 27 July 2020

    Under certain circumstances the hybrid unit may shut down and cause loss of motive power.

    Remedy:Reprogram the Power Management ECU.

    Affects cars built Feb 2014 to Nov 2015

22 older recalls not shown.

A recall applies to a build range, not to every car of this model. Check a registration to see whether one specific vehicle has an outstanding recall.

Toyota Prius MOT record

From 162,575 recorded MOT tests, 13.3% failed.

MOT pass and failure rates by year of first registration
RegisteredTestsFailedMedian mileage
20243355.4%31,719 mi
20235125.3%60,204 mi
20221,6765.2%41,769 mi
20213,1545.5%49,696 mi
202010,2027.3%57,792 mi
201917,5616.8%83,816 mi
201815,5577.8%95,141 mi
201715,6748.4%111,129 mi

Most common reasons for failure

  1. Tyre tread depth not in accordance with the requirements33.9%
  2. A tyre seriously damaged19.8%
  3. A suspension pin, bush or joint excessively worn17.0%
  4. a brake lining or pad worn below 1.5mm15.1%
  5. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc14.3%

Figures cover every Toyota Prius tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Toyota Prius official figures

Median across 4 variants on sale, electricity / petrol.

Combined economy
65.2 mpg
WLTP median across variants
CO2 emissions
99 g/km
Sets the first-year tax rate
Electric range
48 miles
Manufacturer WLTP figure

Official figures for new cars. Real economy varies with driving, load and conditions.

Frequently asked questions

What is the MOT requirement for a Toyota Prius in the UK?

In the UK, a Toyota Prius must have an MOT test when it is three years old and then annually thereafter. This ensures that the vehicle meets safety and environmental standards.

How can I check if my Toyota Prius has a valid MOT?

You can check the MOT status of your Toyota Prius by visiting the official UK government website. You will need to enter the vehicle registration number to see its MOT history and expiry date.

What common issues should I look for before the MOT test?

Before the MOT test, check the lights, brakes, tyres, and windscreen wipers of your Toyota Prius. Ensuring these components are in good condition can help you avoid failing the test.

How much does an MOT test typically cost for a Toyota Prius?

The cost of an MOT test can vary depending on the garage, but it is generally around the same price for most vehicles, including the Toyota Prius. It is advisable to shop around for the best price.

What happens if my Toyota Prius fails the MOT?

If your Toyota Prius fails the MOT, you will receive a list of issues that need to be addressed. You must fix these problems and have the vehicle retested before you can legally drive it.

Can I drive my Toyota Prius if the MOT has expired?

No, you cannot legally drive your Toyota Prius if the MOT has expired, unless you are driving it to a pre-booked MOT appointment. Driving without a valid MOT can result in fines and penalties.

How can I prepare my Toyota Prius for its MOT?

To prepare your Toyota Prius for its MOT, ensure it is clean, check fluid levels, and inspect the tyres and lights. Regular maintenance can also help improve your chances of passing the test.

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