New and used cars
Have you bought a shiny new car that's filled with faults? Or have you been sold a second-hand car that's unfit for the road? We can help if you've got a car that's not what you paid for.
Answers to your problems
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My new or used car has a problem, what can I do?
Which? explains your rights if your new or used car develops a problem or isn't quite the little runner described in the advert.
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Is there a 14-day cooling-off period when buying a car?
If you buy a car then change your mind, it’ll depend on how you bought it as to whether you’re protected by the 14 day cooling off period.
Step by step guides
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How to complain about a car dealer
What you can do if a car dealership isn't dealing with your complaint after you've had problems with a new or used car
Letters
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Letter rejecting a new or used car bought from a dealer
If a second-hand car you bought from a dealer develops a fault, you can use this template letter to help you claim a refund.
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Join our campaign
& help us reach 150,000 signatures
When we discovered back in 2012 that some eco cars were not as eco as they claimed, we decided to launch the ‘Come Clean On Fuel Claims’ campaign. Then, when Volkswagen admitted to rigging official emissions tests in 2015, we had the opportunity to ramp up our campaign. With your help, we’ve convinced the government to introduce a new test recreating a real-world mix of driving environments that, it is hoped, will slash harmful emissions from diesel cars by two-thirds.
Find out more about Fuel claims on Which? Campaigns