U.S. auto dealerships are relying more heavily on parts and service operations and finance and insurance, or F&I, products as profitability from new-vehicle sales weakens. Dealers typically have four profit streams: new vehicles, used vehicles, parts and service, and F&I, giving them some protection across market conditions. Average pretax profit per public dealership more than tripled from $1.9 million in 2018 to $6.8 million in 2022, but average gross profit at dealerships owned by public companies fell to about $3.9 million in 2025 as vehicle supply moved closer to demand and competition increased. Parts and service sales nevertheless rose 48% over five years to $164.6 billion as of last year, while average parts and service gross profit increased from $3.3 million in 2020 to $5 million in 2025. Dealerships are trying to win back routine maintenance business from independent chains, which 42% of Americans identified as their primary service provider in 2025, up from 20% in 2020. Strategies include walk-in appointments, service financing and video inspections. Longer vehicle ownership, with the average passenger car age reaching 14.5 years last year from 11.5 years a decade earlier, extends the opportunity for recurring service revenue. F&I remains a high-margin business: at Asbury Automotive, it generated about 4% of revenue from January through June but 23% of gross profit.