Diesel vehicle registrations have bottomed out in 2025, with a market share of just 5.2% in Spain during the first six months of the year. Diesel engines have practically disappeared from the market, due to a drop in supply—the main car manufacturers are opting for conventional hybrid, plug-in hybrid, or mild hybrid engines as an alternative to diesel engines—and almost nonexistent demand.

The age of the car fleet circulating on our roads continues to grow and now stands at an average of 14.5 years, a figure 0.3 years higher than the 14.2 years recorded in 2023. This figure is even higher if we analyse the rest of the vehicles. We find that industrial vehicles are the oldest in the fleet with an average of 15.1 years, but not far behind commercial vehicles, with 14.7 years. As for buses, they are the youngest with an average of 11.5 years.