Welcome to OOF
Cheers mate will check all that in due course. Had freed off the F/O/S caliper about a year and a half ago, and it went sticky again so it might be I need new slider seals or something.
I would suggest that new pins and seals would be sensible at this point, just to save messing about in the future. That's <£10 per side, and means you can concentrate your effort on cleaning out the bores they slide in - soak them in solvent and scotchbrite.
Seized calipers tend to make the pedal harder, not spongy.
also .extra suggestions.
if you clamp the front hoses and the pedal feels much better then its an issue with the fronts.usually the slider pins but can be air or hoses as suggested.
if you clamp the rear and the pedal feels much better then its a rear issue.again could be air or hoses but also could be seized pads in the caliper or a stuck piston causing the disc to push to one side.
if you bleed it all and it goes perfect ,then starts to go softer again a few weeks/ months down the line suspect a caliper slightly leaking seal drawing air back in .
just afew ideas
2 types of 3 button ones used on facelift saloons, and they are not interchangeable.
Last one I bought from the dealer was only about £25 by the time VAT was added, though that was pre Pug days.
The cheap fob cases have hard buttons, which means you end up pressing it harder, and it wrecks the switches - another reason I always bought new GM fobs.
