If you haven't had much experience with working on Mazda, take it in, but it'll probably run you anywhere from $200-$500. (Or if you lived near me about $50 plus the part) If you want to do it yourself, then get ready for some light but intensive work. First of all, you need to make sure that you block the tires and such cause it may want to roll without the engine keeping the trans from turning. Next, make sure that you have all the tools that you need. It's a pain in the ass to go running for more. Now, the easiest way to do it will probably be to pull the tranny back from the engine. To do this, you'll need to take the drive shaft off, unhook all the wires and cables and such, unbolt the bell-housing and tranny crossmember AFTER supporting the engine and tranny seperatelly and then slide the tranny back and unbolt the pressure plate from the engine. After that, it's basically as simple as taking the old clutch out and popping the new one in with an alignment tool(You can rent one at most part stores) and then reverse the disassembly. You could also do it by taking the engine out, but then you'd have to rerun all your vacuum hoses and wiring when you put it back in plus you'd need and engine lift. The first way is easier. If you want a walk-through of the second way, just ask.