As the model was fully redesigned for the 2003 model year, there are only a few changes on the 2004 Honda Accord. Availability of side curtain airbags has been expanded this year to four-cylinder EX models -- standard on those with leather, optional on cars with a cloth interior. All four- and six-cylinder EX models equipped with a leather interior now have XM Satellite Radio with three months of free service as standard equipment. And as with all Honda cars this year, a new seatbelt reminder system is standard. Accord models meeting California's stringent Partial Zero Emissions Vehicle (PZEV) standards -- all four-cylinder sedans equipped with automatic transmission -- will also be sold in the states of New York, Maine, Vermont and Massachusetts.