Hi all, new guy here. My X5C has one motor that sometimes works fine, other times you need to give it a flick with your finger to get it to spin. New motor time or is there something else to check? Thanks!
Check the gears and how they mesh. Doesn't take much debri (like a couple of grains of sand) to slow things down. Grab a magnifying glass and take a good look at the pinion. Could also be a bent shaft.