2017 4Runners are included in the list of vehicles which have problem Takata air bags, and which will be recalled at some point in 2018.
This is the list of court filings and other documents in the Takata air bag class action lawsuit:
https://www.autoairbagsettlement.com/en/Toyota/Documents
Notice the document titled Toyota Settlement Subject Vehicles, here:
https://www.autoairbagsettlement.com/Content/Documents/Toyota/Toyota Subject Vehicles.pdf
2017 4Runners are at the bottom.
Then read the Toyota Settlement Agreement, here:
https://www.autoairbagsettlement.com/Content/Documents/Toyota/Toyota Settlement Agreement.pdf
Paragraph 43, which is on Page 17, says:
43.“Subject Vehicles” means those Toyota vehicles listed on Exhibit 9 that contain or contained Takata phase stabilized ammonium nitrate (“PSAN”) inflators in their driver or passenger front airbag that (i) have been recalled, or (ii) shall be recalled or contain a desiccant and that may be subject to future recall as referenced in the National Highway Traffic Safety Administration’s (“NHTSA”) Consent Orders dated May 18, 2015 and November 3, 2015, and amendments thereto, as indicated in Exhibit 10.
Toyota's vice president signed that settlement agreement in May 2017.
To sum it all up:
Toyota sold new 2017 4Runners with Takata air bags in them.
They knew the 2017's would be recalled at some point. Maybe the dealer told buyers, maybe not.
Right now, most Toyota dealers play stupid about this issue, and tell you everything is okay because your 2017 isn't on the recall list, and that you have nothing to worry about.
The 2017 4Runners will be on the recall list later this year, once Toyota officially adds them to that list.
Until then, 2017 4Runner owners are driving around with Takata airbags.