Hi there Kym... and welcome to the Owner's Forum. I hope you will find us a useful lot! You sound as though you have already replaced most of the parts that wear out quickly, although I would have expected the clutch to last for at least 140.000 miles! I have a personal theory that the original Zafira Brake Discs are either made of fairly soft steel, or are perhaps rather more exposed to the elements than other makes of vehicle brakes are, because, I think that most Zafira owners find that their brakes need attention more often than you would expect! You have also come up against the broken wires in the rear doors syndrome...that is another known weakness, but repairable reasonably easily, if you are handy with a soldering iron, or have a tame auto electrician in the neighbourhood.
Apart from the odd niggles though, we do like our 2.0dti which, thanks to its full leather interior, heated seats and retro fitted cruise control (£3.50 off eBay!) is very nice to travel around in and drives very well, when the spanner light is not on and we find ourselves in 'Limp Home Mode' !
Keep Smiling and enjoying your Zaffy... Cheers.. Robin