I interned with a Tier 1 automotive supplier for 4 summers in the engineering department while in college and my son is a senior designer for a Tier 1 automotive supplier in their R&D group for the last 25 yrs. My experience with design/engineering problems is that a non-recall level problem is usually assigned to an engineer and a couple of lab technicians to work on problem determination and resolution. What about the rest of the engineering/design staff? They are hard at work on scheduled update and new design targets. I don't know for sure if this is what's going on here, but I wouldn't be surprised if it was.