Sounds like a lot of over-reaction here. The following is an excerpt from Genesis Canada's letter to owners. Hopefully this will reassure some of the more hysterical posters:
Precautions:
No precautionary measures are to be taken at this moment; however, if you
experience any issues with your vehicle, please contact your distributor
immediately.
WHAT WILL GENESIS DO?
Your Genesis distributor will retighten the crossover fuel pipe and, if
necessary, the pipe assembly will be replaced based on inspection results.
These repairs will be performed at NO CHARGE to you.
Have you actually contacted your (or any) dealer about this? Do you actually know of anyone who has had their unit "retightened"? People are obviously and justifiably concerned, but I have not personally seen any "hysteria".
The above verbiage appears to be aspirational, ie, the Genesis "plan" not a description of current affairs/availability. Across dozens of posts, US and Canada, not a single one who has actually contacted the guys holding the wrenches, has found ANY dealer prepared, ready and willing to do this repair, as Corporate has not given them the tools, the parts or the marching orders to do so.
The "advice" letter people are receiving appears to be a corporate attempt to temporarily address an NHTSA issue, which. while potentially deadly, has a low chance of occurring (or at least so far). What is more concerning to me is that there are reports I have seen (here and on FB) from actual owners (granted, unverified--and how would one?) that truly leaking cars (and there are definitely some) have been impounded due to the severity of the danger with no immediate recourse.
Apparently Kia had this exact same issue with their minivans, issued a fix, and are actively doing/have done the repairs. But Kia's is a far smaller number of models/units affected than their sister company Genesis.
As SirJangle notes above, Genesis probably wants to ensure they have all their ducks in a row to release the actual instructions and parts, as well as prioritization procedures, because they cannot afford to dump 100k new service calls all at once on their already undersupplied, overburdened, understaffed, and less-then-stellar reputation dealer network. There will surely be a mad rush and demand by every aware owner for his car to be fixed as soon as possible. They want to be able to respond as smoothly as possible.
H Corp does not need any more black eyes after their only now resolving ICCU service debacle.