Two problems related to brake disc caliper have been reported for the 1998 Volvo S70. The most recently reported issues are listed below.
I took my car to the sears auto center at 1178 el camino real in san bruno, California (sears store #6909) on September 2, 2018 for front brakes. Sears returned the car to me on 9/2/18 (a copy of my "final invoice" is enclosed). I subsequently learned that the dust boot for the right front brake caliper is missing. I returned to sears on September 10 and told the manager in charge, mr. Holloway, that I had learned - from another mechanic who had been doing other front end work - that the dust boot was missing and that this is one of the component parts of the brake caliper system (designed to keep debris and moisture out of the brake caliper). Sears re-inspected my vehicle on September 10 and confirmed that the dust boot is missing. I was told that the department manager (mr. Julio estrada) would need to address the situation. On September 11, 2018, the manager of the sears auto center - mr. Julio estrada - refused to fix the problem at sears' expense. I believe that sears was negligent and ask that NHTSA investigate the conduct of sears auto center.
The left front brake rotor locked up, causing some components to burn up. The problem was due to a stuck caliper, which according to Volvo is not related to the brake pad and rotor replacement performed by dealer. Lower ball joint was also replaced.