I normally do, but the set I bought at Advance Auto parts didn’t match the pads on the car. There is a large metal clip on the replacement pads that blocks the caliper. So I had to leave the original pad on the outside and just replace the inner pad, which was worn down to the metal. hence the grinding noise.
There’s about a half inch still left on the outer pad. If I can get the darn clip off, I’ll replace that one too.
And yes, the inner pad was severely worn, while the outer wasn’t so I guess I have a brake caliper problem. 