Xtrons Head Unit died after 8 years, could that be my battery issue

[dog2bert]

I have been having the issue where my battery will be dead if I let the car sit for 2-3 weeks.
I suspected it was the head unit, Xtrons, and the headunit died this week.

The orange lights turn on the headunit, but it will not display the android splash screen. I checked the rear fuse on the head unit and it is fine.
I guess 8 years was a pretty good run.

[Slideways]

On more recent Xtrons units, there is an option in the factory settings that allows you to change when the unit shuts off completely. By default, it is always in standby mode to allow for fast startups. That could have been draining the battery after 2-3 weeks.

Battery drain could also be caused by another module in the car.

[dog2bert]

What modules usually cause battery drain on the e46 chassis?

[elrichmeister]

What modules usually cause battery drain on the e46 chassis?

You'll need to do parasitic drain test to find out which module is active by pulling fuses and checking the amp drain with a multimeter when the car is "asleep". I had a parasitic drain and diagnosed it down to pulling one of the radio fuses.

[dog2bert]

If it is the FSR (final stage resistor) is that easier with the radio out?