Well I am currently (still) on the hunt for a 100 series, and one of the many things I am considering when I finally find the perfect one is slightly modernizing the audio. I know a lot of guys run a simple cassette adaptor, but I came across something I had not seen before that may be a great option for many. I have CarPlay on my Daily Driver and have come to love it. On the flip side I generally don't like aftermarket headunits, so that can be tough when I am considering what to do.
On my 4Runner I decided to give a CarPlay/Dash Cam mirror a try and I have to say I love it. It was a very clean install, was able to not alter the factory audio at all, and the sound quality is great. The 4Runner has a factory aux-in, which makes it easy, but on a 100 series it would be easy to combine with a cassette adaptor. Also, if you are running a rear tire carrier this is an easy way to get your rear vision back and use it as a digital mirror since you can split the screen and do half CarPlay, half rear (or front) camera.
Here is a link to what I the one I bought (actually bought a few and kept the one that seemed the best quality) and a few photos in my 4Runner. When I finally get a 100 series this is likely the direction I will go.
Amazon product ASIN B0BN3R4J8F
On my 4Runner I decided to give a CarPlay/Dash Cam mirror a try and I have to say I love it. It was a very clean install, was able to not alter the factory audio at all, and the sound quality is great. The 4Runner has a factory aux-in, which makes it easy, but on a 100 series it would be easy to combine with a cassette adaptor. Also, if you are running a rear tire carrier this is an easy way to get your rear vision back and use it as a digital mirror since you can split the screen and do half CarPlay, half rear (or front) camera.
Here is a link to what I the one I bought (actually bought a few and kept the one that seemed the best quality) and a few photos in my 4Runner. When I finally get a 100 series this is likely the direction I will go.
Amazon product ASIN B0BN3R4J8F