The fourth-generation SEAT Leon Mk4 (KL) 2020-present moved to the MQB Evo platform with a fully digital cabin, connected services and efficient mild-hybrid and plug-in hybrid options. After servicing, its modules expect the maintenance data to be cleared. An oil service reset stops the inspection prompt returning, and a service reset clears the maintenance light at start-up. Owners often also need a TPMS reset after a wheel change, electric window initialisation following a power loss, and a start/stop reset after electrical repairs. The plug-in hybrid’s 12V battery needs registration when renewed. Choose the reset procedure matching your Leon below to proceed correctly.