If you still have a computer with a CD ROM (or blueray etc) you can rip them to MP3 and stream them to a more modern car stereo or aux input. Sheesh I remember spending 100s of hours burning my CDs to MP3. Now I have no idea where my CDs are even stored. Maybe I gave them away.
Just got myself a new (very used, but new to me). Runs great. But not even bluetooth. CD changer in the trunk. Very 1999 tech. I am searching for a low cost method to convert it to bluetooth. There is one dash mount thingy that broadcasts into one of the radio channels and mirrors to a phone.
There was a lifeguard at the pool I rehab at in his early 20s.
I gave him a CD of my latest musical efforts. A few weeks later I asked him if he ever listened to it.
His response was that he thought he had a CD player somewhere in his basement but he couldn’t find it.
I’ve got a Parasound C/DP 1000 with the outboard DAC & while it’s 27 years old now and acting more than a little cranky and quirky sometimes, (just like me), it was built like a tank and still sounds wonderful.
I can also up-res my files to 24 bit/192k sample rate but only take the time to do it for my favorites. Even just converting mp3 to .wav makes a difference on a good system.
You should be able to pick up a Bluetooth adapter for your car at just about anyplace from Best Buy to WallyWorld or your local car stereo installer. Good luck.
You can get an external CD drive with a USB connector for modern machines.