The keys have a chip inside of . the chip you will receive is 48, the chip key must match the engine computer in order to start the car, so you have to ask local locksmith to do that. This ignition switch comes with 2 keys. The chip is initialized.In order to solve this issue you can: Have the key to the lock you ordered copied by a local locksmith, ask to the chip to match in your old key.If you do not have the old key a locksmith can connect a small machine to the OBD2 port in the vehicle and the car to work with the key that came with the lock.Part Number: 35100-SDA-A71Application:For -V 2002-2006For 2003-2011For Accord 2003-2007Does not fit 03-05 2-Door,Does not work with manual transmission.Important Notice:Model Year Chip ModelAccord 03-05 48Accord 06-07 8EAccord 08-11 46 Electronic chipAccord 14-16 46 Electronic chip 05-06 48 07-11 46 Electronic chipFit 03-06 48Fit 07-08 8EFit 09-11 46 Electronic chipOdyssey 05-06 48Odyssey 07-11 46 Electronic chip 03-05 48 06-07 46 Electronic chip 09-11 46 Electronic chipcolor:Silver + blackMaterial:MetalPackage Contents:1 x Ignition Switch Lock Cylinder2 x Transponder Keys with 48 chipOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.