The keys have a chip inside of them. But the chip you 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, but ask them to program 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 program the car to work with the key that came with the lock. Part Number: 35100-SDA-A71 Application: For -V 2002-2006 For elements 2003-2011 For Accord 2003-2007 Does not fit 03-05 2-Door, Does not work with manual transmission. Important Notice: Model Year Chip Model Accord 03-05 48 Accord 06-07 8E Accord 08-11 46 Electronic chip Accord 14-16 46 Electronic chip 05-06 48 07-11 46 Electronic chip Fit 03-06 48 Fit 07-08 8E Fit 09-11 46 Electronic chip 05-06 48 07-11 46