mithrilG60

As a general rule you cannot reuse the sensors. Even if they haven't worn through they're usually so fused to the pads that they break when you try to remove them. The Brembo's are multi-piston floating calipers so both sides have to be pressed back at the same time or you'll find you're pushing out some pistons when pushing in the others. I bought a that works really well.



Some pads come with new hardware and some don't, I've usually just reused the existing but I've also never seen retention pins as gummed up and corroded as those in the videos above.

'10Q7TDI_Prestige'

You can probably get by with the old hardware if just swapping pads out, but you should replace the hardware (return springs and slider pins) when changing rotors, which is every other pad change. Get new wear sensors as the wires and whatnot get brittle over time, and it's a real buzzkill and PITA if you break one during the swap or it later fails and lights up the dash...repeatedly. Those sensors are pretty cheap to buy from FCP...just be sure you get the right ones, as the front and rear pad wear sensors have different cable lengths.

If you are doing full brakes (rotors/pads/sensors), then you need to get new hardware too, and don't forget the brake lube, and that you will need to bleed the brakes/replace brake fluid every two years, etc. It's much more affordable if you plan ahead, and often a lot less expensive if you buy a prepared 'kit' for all four wheels at once, rather than just a single axle. Even with the kits, the brake hardware is generally not included, so pay attention to the details, and drill down to what exactly is included rather than assuming.