YES you can program the SAME remote to operate BOTH cars.
This was done with one remote a 2000 Accord EX and 2001 MDX.
Here is a transcript of the instructions:
NOTE: the system will accept upto 3 transmitters. The transmitter
codes are stored in a stacking-type memory. If a fourth transmitter
is programmed, the code for the first transmitter will be erased.
1. turn the ignition switch ON
2. within 4 seconds, press the "LOCK" or "UNLOCK" button on the
transmitter. Make sure it is aimed at the receiver unit under the audio unit (or in some Honda/Acura cars, behind the glove box).
3. within 4 seconds, turn the ignition switch to LOCK
4. repeat steps 1, 2, and 3 two more times. Use the same transmitter used in step 2.
5. within 4 seconds, turn the ignition switch oN
6. within 4 seconds, press "LOCK" or "UNLOCK" button on the
same transmitter. Make sure the power door locks cycle to confirm
that the system is in programming mode. Press the "LOCK" or "UNLOCK" button again.
7. press the "LOCK" or "UNLOCK" button on each transmitter you want to program. Make sure the power door locks cycle after you push each transmitter button to confirm the system accepted the transmitter's code
8. turn iginition switch to LOCK to exit program mode
Hope this helps. Try it, you can always undo it
