Can anybody help tell me where the immobilizer chip that I need to remove on my 2003 Accord EX

 

While I have no idea where the "chip" is for your car (I rather doubt it is a single chip), I'm pretty sure if you remove the immobilizer functionality you will not be able to start and operate your car.

 

And... this "HAF help" section is for questions about the website, not questions about the cars. I'm moving this to General Tech.
Welcome to HAF

 

Well, there's a chip in your key, a reader very close to the key lock assembly, and the rest of the immobilizer circuit in the ECU. Any of those replaced by non-matching parts will cause the engine to not run.

 

The immobilizer chip should be near the ignition keyhole mounted on the ignition. This part only transmits the signal from the key to the ECU verifying you have the correct key. Meaning the part is plug and play and has no bearing on if the car starts or not unless the part is missing or bad.