Here is some copied info from the 2004 Jeep Liberty's online owner's manual:
G. Registration and Operation Requirements
The Basic Limited Warranty covers your vehicle
only if:
it was built for sale in the U.S.;
it's registered in the U.S.;
it's driven mainly in the U.S. or Canada; and
it's operated and maintained in the manner
described in your Owner's Manual.
H. If Your Vehicle Leaves the United States
(We Include U.S. Possessions and Territories
as Part of the United States for Warranty
Purposes):
EXCEPT WHERE SPECIFICALLY REQUIRED
BY LAW, THERE IS NO WARRANTY COVERAGE
ON THIS VEHICLE IF IT IS SOLD IN OR
REGISTERED IN COUNTRIES OTHER
THAN THE UNITED STATES.
This policy does not apply to vehicles that have
received authorization for export from
DaimlerChrysler. Dealers may not give authorization
for export. You should consult an authorized
dealer to determine this vehicle's warranty
coverage if you have any questions.
This policy does not apply to vehicles registered
to U.S. government officials or military personnel
on assignment outside of the United States.
You can view the entire warranty info by submitting a request at
http://www.jeep.com/crossbrand/warranty/