London, UK - The 2012 Auto Express Product Awards has been revealed and the gadget most drivers can't live without – their sat-navs.Over 25% of the votes named a GPS system as their in-car gadget of choice, trumping air-conditioning and audio systems.The Product of the Year title belongs to digital radio specialist Pure for its Highway 300Di. This device can add Digital Audio Broadcasting (DAB) and iPod connectivity to any audio system.ADDING VALUE TO YOUR RIDEBilt-Hamber claimed three awards for its cleaning products while TomTom scooped the prize for Best smartphone app. Readers chose Goodyear as the Best summer tyre and Continental for winter.Steve Fowler, editor of Auto Express, said: “With many car owners holding onto their cars for longer, keeping them pristine is critical to maximising their value at resale time. The Auto Express Product Awards is a chance for us to acknowledge the very Best products out there for our readers to add value to their cars.”2012 Product Awards:Top awards Product of the Year 2012 - Pure Highway 300DiBest car accessory – SatnavAccessoriesBest tyre - Goodyear eagle f1 asymmetric 2Best winter tyre - Continental contiwintercontact ts 830 pBest headlamp bulb - Philips x-tremevisionBest portable sat-nav – Garmin nülink! 1695lmuBest fm transmitter – Logic3 mip168kxBest hands-free kit – Jabra easygoBest battery charger - Ctek mxs 3.6Best atlas - a-z Great Britain road atlasBest tool bag – Halfords large tool bag with trayBest pressure washer – Hozelock heavy duty 150Best roof box – Kamei husky xxlCar careBest wax – Turtle wax ice synthetic paste polishBest wheel cleaner – Bilt-hamber auto-wheelBest tyre shine – Carplan tyre slikBest bumper shine – Simoniz back to black bumper shineBest leather cleaner – Carplan leather connoisseur renovation kitBest upholstery cleaner – comma interior cleanerBest trim cleaner – Comma interior cleanerBest clay bar - Bilt-hamber auto-clay regularBest screenwash – Halfords screen washBest shampoo – Bilt-hamber surfex hdWhat's your top car gadget or accessory? Share your thoughts in our comments section below.