VANOS variable valve timing failure
ENGINE AND ENGINE COOLING
3 NHTSA complaints · 2010-07 → 2011-09
“MY VEHICLE HAS 87,000 MILES AND I WAS JUST INFORMED THAT THE VANOS HAD FAILED. THIS IS THE SECOND TIME THIS ISSUE HAS OCCURRED WITH THIS CAR, HOWEVER THE VEHICLE IS NOW OUT OF WARRANTY AND THEY WANT TO CHARGE ME ALMOST $5,000 TO FIX”
“THERE ARE NO VISUAL SIGNS OF THIS FAILURE UNLESS THE VALVE COVER TO THE ENGINE IS REMOVED. UPON REMOVAL THERE IS A METAL FRAGMENT THAT IS RUNNING LOOSE UNDERNEATH THE VALVE COVER. WHEN THIS METAL PIECE FALLS OUT IT CAN ENTER THE TIMING CHAIN”
“THE VANOS SYSTEM IN THE 2001-2006 BMW M3 IS A COMMON PART THAT IS PRONE TO FAILURE. THE INTAKE AND EXHAUST BOLTS OF THE CAM GEAR CAN SHEER OFF DUE TO IMPROPER TORQUING FROM THE FACTORY AND IMPROPER HARDNESS OF THE BOLTS”