seating, premium audiophile sound system with in-dash six-disc CD changer and rear subwoofer and four-wheel independent pneumatic air-ride suspension system. Powertrains Safety and security Like the generation before, a two airbags supplementary restraint system (SRS) with 2-way occupant protection was standard on Expedition. The dual front SRS air bags now included the Personal Safety System (PSS). PSS would tailor air bag deployment for driver and first passenger and included occupant classification, seat position, crash severity, safety belt pretensioner, load-limiting retractor and safety belt buckle usage sensors. A new optional four-air-bag supplementary restraint system (SRS) with 6-way occupant protection was also available. This new air bag system included SafetyCanopy dual side curtain air bags for head, upper torso and rollover protection. SafetyCanopy would deploy along the A, B and C-pillars down to the vehicle's beltline. SafetyCanopy could remain inflated after deployment for extended protection and replaced the dual front side airbags featured on the first-generation Expedition. Other features included side-intrusion door beams, security approach lamps, SecuriLock with smart key and engine immobilizer, BeltMinder, three-point safety belts for all rows of seating, post-crash fuel pump shut-off, tire pressure monitoring system (TPMS) and four-wheel, four-sensor, four-channel anti-lock braking system (ABS) with electronic brakeforce distribution (EBD) and emergency brake assist (EBA). AdvanceTrac electronic stability control with traction control system was introduced as an optional extra. The electronic traction and stability mitigation system would expand to include roll stability control (RSC) for the 2005 model year. Model year changes 2003 Before the 2003 model year ended, Ford updated the running boards on Expeditions equipped with the Eddie Bauer trim. Earlier in the model year, Eddie Bauer models had received standard black running boards. Toward the end of the model year, Arizona beige running boards were reintroduced to complement the Arizona beige body work which came standard on Eddie Bauer. Body colored running boards had previously been offered on the first-generation Expedition from 2000 to 2002. 2004 No major cosmetic or mechanical changes. The Expedition Eddie Bauer Premier model is reintroduced after being absent from the 2003 model trim line-up. Monochromatic paint work with blacked-out headlamps and special alloy wheels were standard on Eddie Bauer Premier versions. A new Expedition XLT Sport model is added with Dark Shadow grey exterior body trim. The FX4 trim level was renamed NBX. 2005 Expedition received new roof rails which replaced the traditional sliding cross-bar roof racks. A new high