Cars advice guides
Independent expert advice on everything from car buying and finance options to reliability, fuel economy, tyres and how to find a good garage, plus unique interactive tools.
How to buy the best car
Whether you're after a new car, a used car or a motability car, our expert buying guides will help you make a smart decision and buy with confidence.
From city cars and sports cars to people carriers and SUVs, discover the best, most reliable cars you can buy, as rated by the independent experts at Which?
How we test cars
What makes a Which? Best Buy car? Find out how Which? goes the extra mile in testing to bring you the most accurate reviews possible.
Which? Car Reliability Check
Find out what problems popular cars are most likely to suffer from using this free interactive tool powered by reliability feedback from almost 60,000 UK owners
Car buying tips
Expert advice on how to buy the best car for you, whether you want a city car, MPV or estate. Our buying tips will help you get the features you need.
Car brand reviews
Find out more about the biggest car manufacturers in the world and read our expert overviews to decide which are worth considering for your next car.
Most reliable car brands
Take a look at the best and worst performing car brands for reliability, according to the 2016 Which? Car Survey
Most reliable cars
Discover the most reliable cars you can buy - from city cars and small cars to estates and MPVs. Based on in-depth feedback from from almost 60,000 car owners.
Most fuel-efficient cars
We conduct our own fuel-economy tests on every class from city cars to SUVs, so you can find an efficient car with mpg results you can trust.
How to choose between petrol and diesel
Our guide shows you how to choose the right engine for your car and our petrol vs diesel cost calculator shows you what you'll be spending on fuel.
How we test mpg and emissions
Learn how Which? tests fuel economy and exhaust emissions to give you a realistic view of how much petrol or diesel today's cars use, and how clean they are.
Car emissions explained
Every petrol, diesel and hybrid car produces NOx and CO. We explain the impact of these emissions, and reveal the most polluting cars from our tests.
Most satisfying cars
We asked thousands of owners to see how satisfied they are with their cars. Find out which are recommended, from city cars to SUVs.
Where to buy a car
There are more places than ever to buy a new or used car and get a good deal. Which? takes a look at your options for when you're ready to buy.
How to get the best price on a car
Check out our tried and tested methods to haggle your way to a great deal on your new car so you don't pay more than you need to.
How to sell a car
Find out how to sell a car and get the best price for it, including part-exchange, private classified ads, auctions and car-buying services.
Car finance explained
Find the best way to pay for your new car. Which? experts assess hire purchase (HP), personal contract plans (PCP) and personal loans.
Car tax explained
Vehicle excise duty (VED) is better known as car tax. This guide reveals how much you’ll need to pay and which cars won't cost you anything.
Car options explained
Optional extras can quickly balloon the cost of a new car. Read on to find out the must have toys, and the ones most likely to maximise resale value.
Car safety features explained
Cars are safer than ever, but crash protection can vary between models. This guide explains the different car technology keeping you safe.
Driver calculators & tools
Our handy, free tools can show you how much fuel your car really uses, whether petrol or diesel is better for your car and more.
Which? Car Survey
The Which? Car Survey is the biggest and best in Britain. It gives real owners the chance to say what they love or hate about their cars.
How to pass an MOT test
MOT tests are vital to keep your car legal and roadworthy. This guide explains how to increase the chances of your car passing its MOT first time.
How to find a good garage
To keep your car roadworthy and your bills in check, read our Which? tips to finding a good, trustworthy garage that'll charge you a fair price.
Should you buy a used car warranty?
Is a used car warranty essential or is it cheaper to pay for repairs upfront? Our guide explains how used car warranties work and if they are worth it.
How to buy breakdown cover
Discover who provides the best breakdown cover - we've rated and compared 22 breakdown companies, including the AA, RAC and GreenFlag.
What to do if you have a car accident
Car accidents can be shocking, but it's important to take the right steps following a collision to ensure you're safe and on the right side of the law.
How to buy car tyres
The right car tyres are key to maintaining grip on the road. Our guide shows what to look for when you get a new set.
Best car tyre brands
Buying the correct car tyres is important for performance and safety. We steer you through car tyre brands available in the UK, including Pirelli and Michelin.
Winter tyres and snow socks
Winter tyres and snow socks are useful for keeping moving when the weather turns nasty. Check out our guide to ensure you get the best product for your needs.
How to fix a puncture
A flat tyre doesn't have to be a disaster. Our videos and simple step-by-step guides show you how to change a tyre and use a tyre repair kit.
Car headlight bulbs explained
Which? reveal the secrets from expert tests of LED headlights, xenon headlights and halogen headlights. Find the best headlights for you.
Money-saving driving tips
Our top 10 tips on how to use less fuel and cut your motoring bills, from planning your route in advance to checking tyre pressure.
Parking tickets and fines explained
There are more than 70 ways to get a parking ticket. Find out your rights, how to appeal a parking ticket and how to avoid getting one in future.
Speeding tickets explained
Find out how speeding fines work, what to do if you're caught speeding and how to appeal the speeding ticket if you disagree with the ruling.
Driving offences and penalty fines explained
Driving offences and the punishments range from the mundane to the severe. Which? details offences resulting in points, fines and even jail.