lord_jagganath 421 Report post Posted October 22, 2013 How do I tell if my 525i has an external amp? a scan off the options show that the radio was a dealer fit option. Quote Share this post Link to post Share on other sites
BM WORLD 1283 Report post Posted October 22, 2013 have a look behind the drop down panel in the left rear of the car. large black box with heat sinks on it and lots of wires , 2 large plugs Quote Share this post Link to post Share on other sites
lord_jagganath 421 Report post Posted October 22, 2013 No, I do not have that in the car, Just the anhanger modul/trailer module mounted on the side wall. just about where your sub would sit once back together, so it is safe to say it didn't come with an amp? as i count just 4 (6 counting the tweeters) speakers in the car ,does this mean I can install a new headunit? (hard wiring a aux input is too much work plus would like blue tooth ) Quote Share this post Link to post Share on other sites
