The automotive parts aftermarket barely existed as an industry in 1919. Cars were new enough that most mechanics ordered directly from manufacturers, parts weren't standardized across makes and models, and the concept of an independent parts distributor operating across multiple brands hadn't been systematized. Elias Fife and Ralph Van Allen started Standard Motor Products in Manhattan's commercial district with the specific proposition that vehicle owners needed a reliable source for electrical system components — ignition, starting, and lighting parts — that didn't require returning to the dealer or the manufacturer. The founding timing captured a structural transition: automobile ownership was spreading rapidly through the 1920s and the repair infrastructure was struggling to keep pace. Fife and Van Allen positioned SMP as a supply chain intermediary — buying from multiple manufacturers, standardizing catalog descriptions, and distributing through the repair shops and parts stores that were beginning to serve the growing vehicle population. The formal incorporation in 1926 followed seven years of building the distribution relationships that would sustain the company through the Depression. The postwar vehicle proliferation created the modern independent aftermarket. As the Big Three expanded production through the late 1940s and 1950s, the diversity of vehicle makes and models increased faster than any single manufacturer's service network could cover, creating permanent demand for independent parts suppliers who could offer fit coverage across multiple brands from a single catalog. SMP built its catalog depth during this period, adding temperature sensors and ignition components for new vehicle applications as they entered the 3-to-15-year post-warranty window that defines the aftermarket opportunity. The 1986 Four Seasons acquisition brought air conditioning and climate control components into the portfolio, expanding from the pure ignition and engine management focus of the founding era into the thermal management categories that now represent a significant share of revenue. Each acquisition — Lemark in Europe in 1999, Annex Manufacturing in 2014, Trombetta in 2021, Nissens in 2024 — extended the catalog coverage and geographic reach without departing from the foundational proposition: SMP is in the business of keeping older vehicles running.