How do I replace the brake Master cylinder on a.

You unbolt the old one, bench-bleed the new one and bolt it on, then bleed the air out. Okay, I know you're looking for more than that, but if you have to ask, your level of experience suggests this is better left to the professionals. If you still want to pursue the job, start with the factory service manual, and ask me specific questions about the procedure. Do you know what bench-bleeding is, why it's necessary, and how to do it?

Of extreme importance, you must not contaminate the brake fluid with any type of petroleum product. I don't even like getting my fingerprint grease in the fluid. Never allow penetrating oil to be used on brake system fittings.

I can share a trick that makes bleeding at the wheels unnecessary and will save a lot of time and potential broken bleeder screws.