Batteries, alternators and coil springs are the most common parts to fail on a car, according to recent research. Warranty Solutions Group (WSG) analysed data exclusively for the UK's Car Dealer Magazine from more than 500 warranties from every manufacturer and worked out the most common issues and faults from each car brand. The top claims were alternators, which accounted for 12%, followed by batteries at 6.06% and water pumps at 3.79%. Start-stop functions were said to put strain on alternato