An electrical overload in the 48Volt (V) electrical system may cause a failure of the Metal Oxide Semiconductor Field Effect Transistor (MOSFET).
This may cause an electrical cascade failure, causing the DCDC convertor to experience an electrical short where the 12V circuit shorts to ground.
As a result, smoke from the DCDC converter can be vented into the passenger compartment, and where sufficient oxygen exists, a sustained vehicle fire may occur.
The Land Rover Discovery Sport MHEV models affected by this recall were manufactured between 25 May 2018 and 2 October 2020.
Land Rover recall code: N503
Source: Rapex Alert 48/2020 A12/01580/20