Use the resources below to help make decisions when you're buying one of their cars. Here are the facts and figures we've got for you:
How reliable is your car? We have 250 of the UK's most popular cars, so you can check out each individual model's rating right here.
Manufacturer results: Our at-a-glance review of how each manufacturer measured up.
The best and worst: Just hope that your car is in the top half of this panel - because it's our round-up of the best and worst cars of 2011
How reliable is your car?
The best and worst
The What Car? Reliability Survey is the most robust of its type in the UK, and up-to-date information can be found at any time at Warranty Direct's www.reliabilityindex.com website.