Tata Steel own jlr now, most 70s 80s jags used Bosch electrical components, typically shared with the various German brands. They definitely skimped on wiring quality in the late 70s, it nearly killed them until Ford rescued them.

The issue with the current recall appears to be with LG Energy Solution South Korea batteries and the jlr Battery management code rather than a hardware issue. Who knows imo modern vehicles are far to complex