I found this thread on HT
Posted by ninety9ex
Alright guys, I have searched and searched and found some half-ass explainations, but I am going to put this up here from personal experience, I have not seen it posted this detailed on this site.

I know this works from experiance!

1) Turn Ignition to On, but do not crank car
2) Within 10 seconds, press and hold the valet button (Slim button b/w the AM-FM and CD-Tape buttons)
3) While holding valet button, listen for the door actuators to activate
4) Continue holding the valet button and press a button on your remote
5) Still holding valet button, lister for actuators to activate again
6) While holding the valet button, turn the key all the way back (off)
8) When the car is turned completely off the radio may flash (the screen would have been blank the whole time)
7) Remove key and test remote

REMEMBER: You cant let go of the valet button at all during the process.

This post was last modified: 07-26-2007 11:42 PM by Squad8.

Good find

Yeah it was! Its gonna be very helpful to someone

I wonder if this would work in conjunction with my aftermarket alarm.

can someone tell me the part number on the back of their keyless remote asap?
i found a jackyard that might have it but i need a part number

This post was last modified: 07-27-2007 11:40 AM by Squad8.

On 99-00's it does for sure. I had both the OEM keyless entry and Viper security system on my Si. Both worked independently from eachother, and both worked perfectly. Of course, the Viper is a far superior product, so I just left the OEM key fobs at home.

fcc id-a269zua101
ref#- 08e61-s01-1mo-01
serial#- w5000126267a
it is a 98 ex

thanks a lot
I tried the first remote and it worked

wow thats pretty cool. good find