Second-hand cars

Has your second-hand car developed a problem? Or have you been sold an old banger? Our guides can help you if you discover you’ve bought a dud and want to make a claim. 

Answers to your problems

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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

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