Smallest issues can have enormous impact

We typically don't hear about recalls unless its widespread or for a vehicle we drive.

Electrical faults can be caused by the simpliest, the smallest issue and that makes verification and validation of electrical components, subassemblies or subsystems during each phase of the manufacturing and production process.

https://www.caradvice.com.au/950403/2019-2021-land-rover-discovery-recalled-with-multiple-electrical-faults/