I've seen the older posts on this topic, but still curious.
I have a 2016 Trail Premium (Now called: TRD Off Road) and HATE the Entune head unit. It is useless. I would like to integrate my iPhone via Carplay. (I've never used it, but seems like a better option and maybe mirrors my iPhone)

I read that folks are finding 2020-21 head units and harnesses (from autoharnesshouse), but read issues about Hazard switch and mods to use original (UGH). And a few other issues like steering control buttons not working. Maybe there is nothing new to report.

Also, when I look on eBay there is a company in CA selling this for a LOT of money $2499 with harness adapter. I read about avoiding someone on eBay (maybe same guy?) Others get units for $800 plus harness cost.

What year head unit do I look for? (2021-2022 only?) Maybe I need to find a salvage vehicle to get for a decent price. Any issue updates on install/usage?
Is this retrofit worth it and what works well and what doesn't? This forum site has become painful to search and load pages with all the advertising, so forgive me if there are additional threads that I haven't found.

I hate the 2025 4runner that was just announced...I mean come on Toyota...the fold down rear seats is an AWFUL design change. No longer lay flat for storing and sleeping. deal breaker right there (and other things). So I am holding on to mine.