When it comes to "developing the remedy" I was also confused. It has been
pointed out to me, at this very forum that
They will announce the remedy when all that is in place. Just like with the first recall. It's a standard practice as far as I understand.
Precisely. Toyota is in a little bit of a rock and a hard place with this type of recall.
They could wait 6-12 months until everything is complete and face a headline saying "Toyota knew about this safety defect for
a year before letting the public know!"
They could wing it as soon as they announce it, but then you'd have thousands of people saying "Toyota says I should go get my car fixed, but my dealer says they have no idea when they're able to schedule a repair. It's dealer vs. dealer based on who is lucky enough to click the button first." What's the point of telling people to go get their engines replaced if there is simply no ETA for when you'll be able to get a replacement engine?
Worse even, the process documentation could be flawed (because replacing a long block is not a super common action and people who write service manuals can make mistakes), necessitating somebody who already spent months waiting for a service to come back and get it repaired again, significantly damaging their brand reputation - "Toyota has no idea what they're doing and I've had to get a second repair to fix my first repair".
I'm pretty sure I remember this exact thing happening for the n52 in my BMW e91 - the repair for the CCV heater required removing a hose that would become brittle over many heat cycles and it always broke, necessitating either a longer repair time or a return visit. BMW then changed their recall repair instructions to replace that part every time the recall was completed, but needed time to be able to stock a few of those hoses in every dealer.
I'm not saying Toyota handled this recall as well as they could have, but they are following what I understand to be the totally universal industry standard steps for a recall, at least in the USA. Find out enough information to be sure it needs a recall & to give a defensible root cause to the NHTSA, announce the recall, develop a remedy (increased parts availability, new logistics patterns, super-custom repair processes for accuracy / technician efficiency & cost / avoiding damage to other components etc, establish recall completion tracking), then complete the recalls in phases (usually VIN groups) to avoid huge long wait times. The recalls on my former BMWs were handled the same way, as were the recalls on my partner's Mazda, as were the recalls for everybody I knew who needed a Takata airbag replaced.