Hi. I’ve seen some videos on YouTube with bluetooth adapters that you tuck in behind the head unit.
Just looking for some advice on one which gives decent sound quality. I ‘think’ I have the standard audio with the nav.
Hi Frazzle, I'm in the same situation as you.
Before you start, go to a decoder website, type in your VIN number, and it will tell you exactly what audio equipment your car already has installed.
I used: mdecoder.com
After this, it basically boils down to budget and preferences.
Do you just want to play music through bluetooth. This could be a simple ebay/amazon dongle.
Do you want to make/receive phone calls, track info on the OEM headunit, still use the steering wheel controls?
Bluemusic seems very popular and well priced.
Here is a guide to installing it......
https://z4-forum.com/threads/how-to-e86-cd-changer-cables-for-bluemusic-bluetooth.125967/
if you want all singing and dancing, then Grom or BlueBus seem to be the best.
I've just ordered a Bluebus direct from the supplier this morning. Worked out at £182 including shipping from the US to the UK.