I am trying to replace the brake pads on my 07 Acura TL and when I jacked it up I couldn't get the caliper bolts to budge at all on all four wheels. I sprayed some WD-40 on them and let it set over night, but that didn't help either. What's a good trick to remove these bolts? Also, what are the exact sizes of the front bolts and the back bolts? Back bolts I believe are 12mm?

 

What size of breaker bar are you using? Use Deep Creep or Power Blaster (not WD40) and let it sit overnight.

 

Stupid I know, but make certain you're going in the correct direction and working from the "front" at times
can be confusing, Left loosy, righty tighty, and make certain you're trying to loosen the caliper bolts and not
the caliper bracket bolts. You can also unlock the steering wheel and turn the wheel to give access to the
particular caliper, at least in the front.

This might help:
https://acurazine.com/forums/third-g...-041-a-578017/