Welcome to the Forum, you have arrived at probably the best Z Forum for information and help for your Z3 or Z4 model.
Its also worth adding your location in on your user details so it appears in the left hand side of your posts or add it in as part of a signature together with the model of your car(s) so you get answers to questions you post that are pertinant to your particular model.
Also very worthwhile to arm yourself with a decent code reader to scan your car when faults crop up. You can either go down the laptop based software such as BMW INPA or a handheld scanner like a Creator 310+ which is a good choice but not so good for models before 1999.
All available on ebay and Amazon for little outlay, they pay for themselves first time you have to use them when faults appear.
