America's Cars Keep Getting Older. These 4 Auto Parts Stocks Get Paid

U.S. households are keeping older vehicles longer, and that’s flowing into aftermarket parts demand. With 293 million-plus light vehicles and light trucks on the road averaging 13 years, O’Reilly Automotive-linked management says each additional year typically triggers more brake, battery and filter replacements. The article highlights four U.S.-listed auto parts distributors. AutoZone is the biggest aftermarket retailer, with domestic commercial sales rising to 8.6% in the latest quarter (and nearly 11% for the year), driven by expanding commercial programs across 94% of domestic stores. Pricing held up as gross margin reached 53.3% and the company repurchased $2 billion in fiscal 2026.