i think its 33, or 34 MM, I know froma nother member on here that 32 was for the rears, and is too small for the front bearings, the back bolts that hold the bearing to the knuckle are 18MM, use a ratchet box end for these, and maybe a short socket and rathcet for the final tightening(dont know the torque by memory) others may chime in for that one. ;) Good Luck!
You need a 34 mm. Can rent that from autozone. You will also need breaker bar and torque wrench, both can be rent from autozone.
To loosen that nut, DON"T take off your wheel. Just pop the center cap so you can access the nut. Soak that nut with penetrating fluid. Then have some one sit in the car pressing on the brakes. Then loosen the nut. If you can't loosen it this way, you won't be able to do it any other way...
some caps dont just pop off, or have a risk of breaking the center caps, if I were you, I would remove the wheel, remove the center cap, replace the wheel with atleast 3-4 nuts, tighten them back up, lower car, break the nut loose, those center capsare expensive to replace(Each one is like $25.00-$35.00USD/Each!), ;)IMO
They (impacts) usually will have to provide at least 200-250 ft. lb to remove it, I think the torque spec (install) is around 140, and given the age of the vehicle etc. you will need a little extra, and a solid air supply usually around 10 cfm. My el Cheapo wouldn't do the job, but....a sliding t-type breaker bar, 2 inch extension w/ the socket, and a big a$$ cheater pipe got it done! I went the yiran hu route and had my brother stand on the brakes.