As far as Ford is concerned the vehicle is paid for the second it exits the assembly line. Then it's billed to the dealer. That's part of why the manufacturers really aren't interested in direct sales: it gets off their books faster.
More cost effective to streamline it on the production side where it affects all units than for the relatively small percentage where it might make a difference on the warranty side.
That said it's relatively not that bad to pull the whole dash assembly on a modern vehicle if needed. Typically...
Which has to do with covering replacement of the exhaust heat exchanger, not the EGR.
(Although interesting to see there's now officially a CSP covering US owners as well. There was the letter distributed to Canadian owners)
Tesla still utilizes a low voltage battery. For safety reasons they want to be able to electrically isolate the HVB battery from the vehicle systems at large. So it necessitates a separate power source to power the computers and electromechanical contactors to do so.
You don't really provide enough information to hazard a guess. What outstanding recalls do you have? Did you have any performed during Q1 '24? There was a bad SOBDM-C firmware deployed at that time which Ford determined was causing loss of power/limp mode. Ford subsequently issued a recall for...
My aftermarket crash part supplier lists it for a whole $11 cheaper than my Ford price (~$455). Honestly if you expect it cheaper than that, better start scrounging the salvage yards.