| |  This article originally appeared in the April 2003 Issue of INSIGHTTrendLine:Insurer Specification of Non-OE Parts
| 2003 | 1999 |
| If aftermarket parts are specified on an insurance estimate, what do you usually do? |
| Use aftermarket parts | 54% | 39% |
| Negotiate for OE parts | 46% | 55% |
| Install OE on your own parts | 0% | 6% |
| Percentage of respondent shops that inform customers that non-OE parts have been specified on repair for their vehicles: |
| 93% | 95% |
In 2002:
| Insurer | Required use of aftermarket parts | Shop negotiates for OE? |
Insurer permits use of OE parts? |
| Allstate | Increased | 51% | Always | 24% | Always | 18% |
| No change | 44% | Most of the time | 28% | Most of the time | 20% |
| Decreased | 5% | Sometimes | 43% | Sometimes | 50% |
| No requirement | 0% | Never | 5% | Never | 12% |
| Farmers | Increased | 53% | Always | 32% | Always | 16% |
| No change | 35% | Most of the time | 29% | Most of the time | 16% |
| Decreased | 0% | Sometimes | 36% | Sometimes | 61% |
| No requirement | 12% | Never | 3% | Never | 7% |
| Nationwide | Increased | 61% | Always | 31% | Always | 9% |
| No change | 31% | Most of the time | 19% | Most of the time | 14% |
| Decreased | 0% | Sometimes | 39% | Sometimes | 60% |
| No requirement | 8% | Never | 11% | Never | 17% |
| Progressive | Increased | 73% | Always | 34% | Always | 13% |
| No change | 20% | Most of the time | 29% | Most of the time | 16% |
| Decreased | 2% | Sometimes | 37% | Sometimes | 55% |
| No requirement | 5% | Never | 0% | Never | 16% |
| State Farm | Increased | 7% | Always | 24% | Always | 53% |
| No change | 27% | Most of the time | 8% | Most of the time | 25% |
| Decreased | 15% | Sometimes | 35% | Sometimes | 14% |
| No requirement | 51% | Never | 33% | Never | 8% |
| USAA | Increased | 38% | Always | 27% | Always | 21% |
| No change | 48% | Most of the time | 17% | Most of the time | 28% |
| Decreased | 12% | Sometimes | 46% | Sometimes | 41% |
| No requirement | 2% | Never | 10% | Never | 10% |
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