SEAT's motorsport history with the León stretches across multiple generations and regulatory categories. The first-generation León Cupra R served as the basis of the León Supercopa one-make trophy from 2003, racing in Spain, the UK, Germany, and Turkey with power raised to 184 kW. The second-generation León competed in the World Touring Car Championship from 2005, with SEAT Sport in partnership with Oreca fielding six factory cars. In 2008, Yvan Muller won the WTCC Drivers' Championship at the wheel of a León TDI, and SEAT secured the Manufacturers' title. Muller's championship was followed by a second consecutive Manufacturers' title in 2009, with Gabriele Tarquini taking the Drivers' crown.
When WTCC shifted to new TC1 regulations in 2014, SEAT Sport did not return as a factory entry in the main class. Instead, the organisation introduced the León Cup Racer as the vehicle for a revived León Eurocup support series.
The León Cup Racer was based on the third-generation León's Volkswagen Group MQB platform, which it shared with the Volkswagen Golf Mk7 and Audi A3 Mk3. The car used a turbocharged 2.0-litre petrol engine in keeping with the power outputs typical of the touring car category, combined with front-wheel drive. It was built to a specification that gave privateer customer teams a competitive and cost-controlled racing package within the one-make format.
The aerodynamic package of the León Cup Racer was significant beyond its own competitive application: when the TCR International Series was conceived, the regulations for the aerodynamic components of competing cars were modelled on the León Cup Racer, establishing the car as the physical benchmark for the entire TCR class.
In 2016, SEAT Sport introduced a full TCR-specification version of the León alongside the original Cup Racer, which retained eligibility in the TCR International Series as well as in national and regional championships operating under TCR regulations. This dual-model approach allowed existing Cup Racer customer teams to continue competing while the new TCR-spec car represented the current homologation.
The León's role as the aerodynamic template for the TCR category made SEAT's involvement in the series particularly prominent during the formative years of the TCR concept. The TCR format, promoting standardised aerodynamic regulations and 2.0-litre turbocharged front-wheel-drive touring cars for customer teams, spread rapidly to regional and national series worldwide.
The León Eurocup was originally launched in 2008 as a one-make support series for the World Touring Car Championship. The revived series from 2014 used the León Cup Racer as its sole homologated machine, providing a controlled and affordable racing ladder for junior touring car drivers within the broader WTCC support package.
SEAT Sport continued to develop racing versions of the León through subsequent generations. In 2020, CUPRA Racing — the motorsport arm of Cupra, SEAT's performance sub-brand — launched the CUPRA León Competición TCR based on the fourth-generation León. That car achieved immediate success in TCR Italy and was subsequently entered in WTCR by Mikel Azcona with Zengo Motorsport. In 2024, CUPRA Racing developed the CUPRA León VZ TCR using the Mk4 restyling as its basis, achieving championship titles in TCR Europe in both 2024 and 2025.