- overheating. anything over the middle mark on the gauge might mean big problems. extensive overheating = warped head = $$$
- shaking between 55-60mph and when braking ... thrust arm bushings; not that expensive; will need to be done every now and then if you want the car to handle and ride like a BMW.
- the electronics -- heating,a/c etc. they usually never break, but it's a old car so it's possible.
Other than that, it's just the usual stuff you would look out for on all other cars.
Welcome to bimmerwerkz. Sorry about no responses; this should really be called e36bimmerwerkz.com as all traffic is pretty much tied to the e36 3-series section. if you are however looking for a good e34-specific forum, I suggest you join www.bimmer.info
<< very knowledable people there.
But do stick around here as well.