Keyless Entry for 2002 Passport?

[thod24]

I just picked up a 2002 Honda Passport. The previous owner decided not to spring for the keyless entry option at the time she purchased it. My question is, do isuzu rodeos and honda passports come with keyless entry systems pre-installed from the factory? Should the only piece of equipment I need to purchase be a fob or do I need to purchase additional equipment?

Thanks for the help.