^ @optimum, the gears dont break actualy
tthere are 2 steel rods in it fixed on the platic body (the retract casing) which has some steels gears and some first or top 2 are plastic ones (so its easy for the small motor to rotate them, as soon as there is excessive load on the motor or any of the 2 rods holding the gears one of the rod leaves its place or trips causing the gears to slip and lose there place function un-properly. the solution to repair it is put the rods back fix it wid magic depoxi or Elfy put some sand to tighten it up. thats wat the repairing guys do and its only good for a month mayb.
i have fixed it as a DIY my self to and plan again to do it, the rite side one needs replacement as its not repairable any more (remembr my syd mirro crash)
altho the left side one is fixable so il try to do dat and post pics to.
the first time it hapend in my car was wen my car was standing in the garage for 2 dayswithout use with folded mirrors, and i was going to the market the miror didnt open and started ( krkkrkrkrkrkrkr) rediculusly.