in color-keyed bezels, and slightly wider running boards. Inside the Navigator was an all-new instrument panel and dashboard area which, significantly, was not shared with the Expedition. Inspired by the symmetrical, "dual-cockpit" layout of the 1961 Lincoln Continental, the instrument panel and dashboard area was adorned with real walnut burl wood inserts and panels and switches painted with a low-luster satin nickel color. Adding to the upscale interior design further were white LEDs, 120 in all, which provided backlighting for controls and switches. Additionally, to direct attention to the high-quality satin nickel-faced analog clock mounted in the dashboard, an articulating door is present to conceal the radio head unit and optional satellite navigation system when they are not in use. Highlighting the Navigator's design changes were other new features and options for 2003. Newly available features like Ford's Safety Canopy side curtain airbags and a tire pressure monitoring system improved occupant safety. Convenience was enhanced by the availability of power running boards (an industry first), power-folding third row seats, a power liftgate, and HID headlights (for top end models). The available rear-seat video entertainment system was updated to be DVD-based and all Navigators now came with standard 18x7.5-inch alloy wheels with 18x8-inch chrome wheels available as an option. Like the redesigned 2003 Expedition (U222), the Navigator benefited from a reworked chassis, new rack-and-pinion steering, and an all-new independent rear suspension (IRS), which brought better handling and ride comfort. The Navigator continued to benefit from a load-leveling air suspension but it now lowered the vehicle by an inch when stopped in the interest of easing entry and exit. The Navigator's powertrain was modified from the UN173, but the 5.4 L DOHC V8 used before was no longer advertised under the InTech name. But it now produced at 5500 rpm and of torque at 3750 rpm. Due to changes brought with the redesign, the Navigator's base curb weight increased to in two-wheel drive models and nearly in four-wheel drive models. In turn, towing capacity dropped slightly. Tire-pressure monitoring was made standard for 2004 while Ford's AdvanceTrac, a type of traction control system, with Roll Stability Control was an option. In 2004, for 2005 the Navigator received a minor facelift with new square-shaped foglights replacing the circular ones used previously. AdvanceTrac with RSC was now standard while HID headlights were available on all models. In the interest of cost effectiveness, the 5.4 L