I recently changed the front brake pads in a Peugeot 207 and I couldn't find a good guide with all the information that is needed, so I will post here what I found in case someone else need this in the future.
The car in question
Here is what you need:
17 mm socket
13 mm socket
8 mm spanner
T55 and T25 bits
Micrometer or a Vernier caliper
Brake pads (part number 4254 89)
New brake pads
You know the drill: Immobilize the car with wheel chocks, loosen the wheel nuts, raise and support the car with the jack stands. (I found that my jack stands were too tall for the car so I took the risk and did the job only with the floor jack, but don't follow my example and always use a jack stand, now it's time for me to search for another set of jack stands)
Remove the lower caliper bolt with the 13 mm socket and rotate the caliper upwards, remove the old pads and the metallic springs and put on the new ones, push back the caliper and reinstall it with the new bolt that comes with the kit.
Then do the same on the other side, if you are going to replace the discs you need to remove the caliper carrier with a T-55 bit and the disc retainer bolts with a T-25.
Don't forget to inspect the thickness of the discs and to torque everything to the correct spec.
Disc diameter 283 mm.
Disc thickness: new 26 mm, minimum 24 mm.
Maximum runout 0.05 mm.
Brake pad minimum thickness 2 mm.
Disc retainer (T-25) 10 Nm = 7.4 lbft
Bleed screw (8 mm) 12 Nm = 8.9 lbft
Brake caliper (13 mm) 30 Nm = 22.2 lbft
Caliper carrier (T-55) 105 Nm = 77.5 lbft
Wheel nuts (17 mm) 100 Nm = 74 lbft
Old vs. new. I found a bit weird that the old pads were directional and had a smaller contact area, maybe is a cost reduction thing???