Hi there, I just spent about 8 hrs repairing my wiper arm bush. But I eventualy figured out the easy way. So to save you guys hours of frustration here it is. First locate and remove wiper motor. On the back of the motor there is a small motor arm, remove it with a 12 mm ring spanner and lay the motor out of the way. You will see behind the the motor opening a link arm with a hole in in it. Now your bush comes in 2 little pieces. Take the mushroom shaped piece and push it though the link arm hole. Then get the ring shaped part of The bush and push it over the locking part of the mushroom part. You will see how this all goes together it not rocket science. Now now get a multi wrench and crimp it together. This is quite awkward but you'll get it. It doesn't close all the way but keep spining and crimping till it won't crimp any more. Now get some none petroleum lube such as hand cream and smear it over the ball part of the motor arm and push it into the opening of the bush. It won't go all the way by hand so crimp it with the multi wrench till it doesn't go any more. Give the arm a spin round to see if you've crimped it evenly and a wiggle to make sure it's all good. Bolt the motor back on to the arm and then the motor back to the fire wall. It should be right now. It's a bastard of a job but I hope this helps. I put some pictures up to help a little. Good luck