Warrantywise Reliability Index 2025

The reliability of your vehicle is of paramount importance to your daily life. It’s what gets you to work in the morning, enables you to pick your children up from school… or simply undertake necessary everyday tasks.

So when your car lets you down, it has significant consequences…
Warrantywise knows this… and that reliability is a huge factor of consideration for buyers, most when purchasing their next used car. This is why we created our unique Reliability Index!

With a third of drivers saying they’ve experienced a sudden mechanical or electrical failure*, Warrantywise wants to put UK motorists in the know, now and into the future, using the host of data we collect from all of our repair requests. Our index shares our data on how likely a certain vehicle is to fail, what is most likely to be the problem when it does, and even how much it’s likely to cost you to fix it.

It’s designed to help you make smarter, more informed choices about your next vehicle purchase.

What makes the Warrantywise Reliability Index unique?

When you are making a significant investment like buying a car, we know you need information you can trust. That’s why we use our real-world repair data, collected daily, to inform the Reliability Index, not opinion surveys or manufacturer claims. 

Here’s what makes our data unique:

• Extensive database: We collect and analyse hundreds of thousands of repair records across various makes and models.
• Right-up-to-date Information: Our data is updated regularly to reflect the latest issues and repair trends.
• Impartial analysis: Unbiased, factual, data-driven information to help you make the best choice.

Make the wise choice?

The Warrantywise Reliability Index empowers motorists with data-driven insights and information to make more informed decisions regarding vehicle choices. 

Whether you’re buying a car or simply evaluating your current one, let our Reliability Index be your guide. 

Explore the data, compare car models, and feel confident knowing you have facts to back up your choices. 

For added peace of mind, choose an extended warranty you can be confident in. Get a quote today.

References and disclaimers

*The data cited was compiled from research conducted by OnePoll in 2024. The survey was based on responses from a representative sample of 2,000 UK: Car owners.

Warrantywise Reliability Index Scoring and Data: Scoring is measured by repair request frequency, average vehicle age at the time of fault, average mileage and average labour time and includes vehicles between three and ten years old where there are a minimum of 250 cars with a warranty. Since the sample was selected, Warrantywise has seen a significant rise in the price of labour and parts, which will impact future repair costs. All data used is from Warrantywise’s proprietary internal research. Warrantywise believes the information contained herein to be accurate at the time of release. However, the company may upload new or updated information if required and assumes that it is not liable for the accuracy of any information interpreted and used by the reader.