My rear washer functions perfectly, except that it shoots out horizontally rather than towards the screen. I have taken the plastic cover off, and it would appear there is a piece missing - i imagine this would be an L shaped connector of some kind. Does anybody know a) what this part is, and what the cost would be?

Your Skoda dealer will sort out the part number and it will be peanuts to buy.

DB.

Spoke to the dealer today and the only part they have is the motor. He says I can adjust mine with a pin. I may he being a bit dumb here but I'm looking at it and have no idea what to adjust? It is basically just a hole?

Put the pin in to the hole and then angle it towards the screen.

sounds like youre missing the jet part from the end of the washer spindle.

I think there is a repair kit for rear wiper motors, I'm guessing it will have the parts you want in it.

Have a look at this thread: Huzzah! My rear wiper jet no longer rotates with the arm

The jet is a simple tbbe with a hole in the side it pulls out easily, rather too easily in your case, the presure has blown it out