That sounds like it is worth looking into
Just a little word of caution !!
Peugeot have a nasty habit of fitting different brake systems on the same models built in the same year
Girling, ATE & others ?? ( Girling being the most likely candidate for Sierra fitment )
I just happen to have had a run on fitting Peugeot discs n pads this year ( 5 ) & have had a devil of a job getting the right parts first time
Even had to ring the Peugot main dealer for the build code for one of them !!
Perhaps my local motor factors are just crap
