With 5% of vehicles over 200K miles, it landed the #4 spot in a 2016 study by iSeeCars.com listing the top 10 longest-lasting vehicles. The Expedition was also the last Ford vehicle to retain its older design found in the early to mid 2000s. Meaning, all the way up to 2017, it kept its triangular-styled taillamps and rounded-rectangular shaped headlamps along with the overall boxy shape of the body. First generation (1997) Known internally at Ford as the UN93, the first generation Expedition was developed under the UN93 program from 1993 to 1996, headed by chief engineer Dale Claudepierre at a cost of US$1.3 billion. Initial planning began in 1991 parallel to PN96 F-Series development, prior to the UN93 program fully being approved in 1993. Styling approval was completed in early 1993 ( years ahead of 1996 production) under design chief Bob Aikins, with the UN93 design being frozen by September 1993, at 34 months prior to July 1996 production commencement. The all-new full-size SUV was unveiled on May 9, 1996, and launched on October 2, 1996, as a 1997 model. It replaced the aging two-door Ford Bronco. The XLT was the base model. The Expedition featured optional three row seating, first row captains chair seating, available second row captains chair seating, leather seating surfaces, illuminated running boards, heated side view mirrors, power moon roof, dual zone climate control and Ford's Mach audio sound system with rear subwoofer. Many of these features were standard on the Eddie Bauer version. Expedition was available with automatic full-time ControlTrac four-wheel drive with two-speed dual range BorgWarner 4406 transfer case and a center multi-disc differential. ControlTrac was introduced in 1995 and included four selectable modes: Two High, Auto, Four High (lock) and Four Low (lock). Two High mode and Auto mode with auto-lock was not available. A short- & long-arm (SLA) independent front suspension with speed-sensitive power-assisted steering was combined with a multi-link rear live axle. Optional equipment included off-road under-body skid-plate protection, Traction-Lok rear limited-slip differential, and a heavy-duty trailer towing package. Optional was an electronically controlled pneumatic air suspension system that would raise and lower the vehicle depending on road and load conditions. The system also included a kneel-down mode for easier ingress and egress, as well as loading cargo, Standard was the 4.6 liter Triton V8 with the 5.4 liter version optional. The first generation Expedition was rated as a Low