I am going to purchase my neighbors '99 300m very soon. However, he has lost they keys. I know that it uses the Sentry Theft Deterrent System. They had a locksmith make some keys and I can get into the car but not able start it.

I am an active memebers at ACNA (Aurora Club of North America) and we have came up with a way to bypass the Pass-key II security system on an Oldmsobile Aurora.

Basically you measure the resistance of the chip in your key and solder resistors into the pass-key system wiring.

So, my question is, is this possible with a '99 300m. Keep in mind I have no key with the transponder in it. I am trying to avoid lockmith/dealer charges.

I am sure someone around here has a list of key resistances or knows a way to bypass the sentry system.

Thanks in advance!!

 

its not a Resistance value besides u need to know what the old chip program was any way go get it programed u try and mess with the system and u will end up paying more.