Advance Auto Parts posted its strongest quarterly same-store sales growth in five years, the company reported. The gain came as the retailer leaned harder into its pro channel, which serves professional mechanics and auto shops. That segment has been a focus area as the company works to compete in a crowded auto parts market.

The pro channel's outperformance signals that same-store sales momentum has shifted toward higher-margin, repeat business from commercial customers. For a retailer battling slim margins, that matters. The five-year sales growth record suggests the strategy is finally paying off after previous quarters showed mixed results.

Investors watching the stock will look for signs that pro channel strength can sustain itself. The quarterly result gives the company some credibility heading into its next earnings call. But one good quarter does not erase the competitive pressure still coming from online rivals and warehouse retailers.