When you crank the ignition key on a modern car, you expect it to purr into life without much audible drama. But the odd noise during that brief interlude between static and active can sometimes provide a significant clue to potential problems. This is the case with a used Volkswagen GTI from the EA888 era (2008 to 2013). A sharp metallic rattle may emit from the timing side of this engine before quickly disappearing as the engine settles down to normal. That noise should alert any potential buyer to underlying issues and should help them buy intelligently or, walk away.
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