CV boots - Standard - had to replace.
Distributor - this was a very expensive repair! It cost me around $1000 for a rebuilt distributor and installation of it. The previous owner, who was my friend, had replaced the distributor one year before I bought it. This is a well known problem with MX3 - it is quite common.
Alternator belt and bracket.
Front wheel bearings.
Front left axle.
Front ball joints.
I bought this car from my friend who had taken care of it and babied it. Her parents helped maintain the car and did all the major work at professional auto garages and kept the receipts. (Timing Belt/F&B Brakes, ATX Flush, Water Pump, etc) I went over everything and I knew her driving habits. She wasn't the type to abuse her car.
I did some research on the car, but not very deep. The first repairs were the CV boots, which was understandable. Then the distributor went out. Cost me $1000 to replace. After that, it went downhill from that point onward.
A couple months later, my back brakes were toasted and I had replaced both sides. (Apparently the previous garage had incorrectly installed them) Cost me another $1000 to fix.
Then my front end started failing me. The front wheel bearings, front left axle and front ball joints failed (I can understand it is a 15 year old car) but I didn't expect the parts to be so expensive.
After I fixed it ($1500), the alternator belt broke, which I had to bring and fix it. It cost me another $600 because the bracket was apparently broken too.
That was the last straw, and I decided to get rid of it before it really put me into the hole. Before I traded it into the dealership, there was a guy who test drove my car. For some unknown reason, the hold button didn't work (to my dismay, many Mazda ATX have cooling problems which will end in a rebuild).
People: I am just stating my experience with the car. The previous owner and I never abused the car. I always took my car for oil changes and I used synthetic. I always had the transmission fluids checked. When there was a problem, it would be in the shop and I did my very best to keep in perfect running condition. I just felt that parts were too expensive, and the distributor and ATX are two of the main problems of the MX3.