According to the service notice, only specific serial number ranges of the Sony W170 in black, gold or red finishes are affected by the problem. The silver variant of the W170 is hence not included in the service notice.
The issue relates to the metal-plated bezel surrounding the lens barrel. In some cases, the finish on this bezel can begin to peel potentially causing splinters. Serial number ranges in which this can occur include:
Sony DSC-W170 (Red): 6501781 - 6736570
Sony DSC-W170 (Gold): 6530821 - 6757270
Sony DSC-W170 (Black): 6504371 - 6740170
Sony is offering replacement of the entire front panel including the lens bezel for cameras that fall inside these serial number ranges, regardless of whether the problem has yet manifested itself. Full details on the procedure for requesting service can be found on the Sony website.