I've repaired my then seven year old LG washing machine as well two years ago. The rear drum support had apparently developed a fault, and was nearly torn in two by the time the funny noises came and hinted at the need for repairs.

The Youtube videos were a great help, but even though the part I needed was available, all the steps along the way to getting the part and fixing the machine made it clear that this was not a process aimed at consumers with the ability to repair such a machine. The manufacturer chose representatives in each country it sold machines in were you had to buy the part (at €100 with shipping not cheap, but acceptable), but the serial numbers never really matched exactly, and the model I had always had one extra letter left unexplained, making buying the part a gamble.

The part fitted and the repair did work perfectly, even though I had to order the stainless bolts I needed to replace the worn originals from somewhere else (a web shop with a sensible interface).

This device was seemingly designed to be repaired (or at least not prevent it), but documentation and lack of sensible part numbers made it harder then it needed to be. Interesting experience though, it feels good to extend the life of the machine by a few years this way.