For 2004, a larger 3.3-liter V6 replaces the 3.0-liter engine, resulting in 10 extra horsepower for a total of 230. Additionally, a fold-flat third-row seat (for two passengers) is now optional on base models and standard on the Limited. To keep the extra passengers content in back, a rear DVD entertainment system is available on Limited models. On the safety front, all Highlanders now come with an electronic stability control system and a tire-pressure warning system, while side curtain airbags for the first and second rows are optional across the board. Rounding out the changes are freshened exterior styling, new seat fabric, new instrument and door panel trim and a 5-hp boost for the base four-cylinder engine (now rated at 160).