Couple of X5 radio issues

[BigGar]

I detail cars for a family that has a few X5's. They've had the typical gamut of air suspension issues and broken coolant overflow tanks, oil separators, etc . . .

All 4.8is models. Three '06 models and one '05.

The '05 seems to have a radio amplifier problem. The radio will work fine, then the sound just goes away, and then it comes back. It's usually good when you first start it, and within 15-20 minutes, the problems begin. Doesn't matter if it's CD's, tape, or radio. I'm feeling it's a failing amp or wiring leading to or from the amp. As with all the other issues these vehicles typically come up with, I'm sure this isn't the only one that's ever done this. Any advice on a fix?

Last week, an '06, the least used one with only about 15,000 very easy miles on it, simply lost the radio altogether. No warning, no intermittent failures. I got in the car to take it to where we clean them up and I was simply unable to get anything "radio" related to come up on the screen. When I press the left (on-off and volume) round button, the little orange light comes on, but nothing shows on the screen to indicate am or fm or anything. No sound. Steering wheel buttons that would run radio functions also do nothing at all. The NAV still works. The Bluetooth still connects with the phone and works perfectly. Sounds fine, volume of the phone is adjustable but it's like the radio isn't there anymore. Fuses are fine. Units on both are bone stock BMW stereos.


Ideas on that one?

Thanks in advance for your insights.



Gar