Has anyone replaced an ignition switch on a 1999 Volvo S80 themselves?

SOURCE: interior electrical problem

apply for ALDATA on the internet ,its only like 25 bucks and you will be surprise how much information you can get you would not need a mechanic again

SOURCE: 1999 Volvo s80 SRS light on says it needs urgent service

You are in the Ballpark. It will cost you several Hundred to fix. Will prob have to have the module replaced. Go to a trusted European repair placed. DO NOT TAKE TO DEALERunless you want to give them the car. They are very happy with $$$$$$$$ You can fix for alot less than dealer. Good luck.

SOURCE: "SRS - AIRBAG SERVICE URGENT"...message

If you have SRS and "brake failure" it should be taken to a dealer. a shadetree mechanic will screw more up than he will fix in this case. trust me on this! you will pay a price, but will save you more $ and less headache in the longrun.

SOURCE: Car won't start

If there is a blinking car icon with an "X" over it. This icon means the Immobilizer has been activated and hence won't allow the car to start. It could be due to a bad SCU, Start Control Unit. The SCU is actually the ignition switch on these cars.
Most of the time it's triggered by the anti-theft system..You can try this trick i learned that the dealers won't tell you...try locking and unlocking of the doors five times with the remote to reset the immobilizer and see if this helps.
Good luck...i hope this helps...please take a minute to rate me a fixya.

SOURCE: "SRS-Airbag Service Urgent" Reset procedures

just unhook the battery for about 20 minutes. if you have an anti-theft radio make sure you know the code and how to enter it.