I've seen brief reference to similar issue on here but the thread is short - so just a bit of advice if anybody can shed any light :
2003 E39 530i - it has the factory sat nav / TV etc, when putting on either FM radio / CD or cassette ( i don't have CD for sat nav so don't know bout that ) there is high pitched distortion , like an old ZX spectrum computer game loading up, but vaguely music can be heard behind.
Curiously this doesn't affect the AM stations.
I've seen on here it could be the FM tuner apparently located in near side rear pillar ?
Or my first thoughts were possibly the amp.
Any ideas and if so any ideas the FM tuner or amp might cost ?
Thanks in advance,