I have a 98 V70XC that I'm parting out. I don't know if there stereo and amp are the same as you 99 but I would imagine they are the same.

I was going to remove the original head unit on my 98 XC but am afraid it will trigger the "code". Is there a way to avoid that problem? What triggers the need for the code input? Is it interuption of power for a certain amount of time?