After several upgrades in 1998, this new Lexus LS 400 featured only minor changes to interior trim. A new engine and new transmission headlined the previous year's changes. Lexus had gradually added features and performance enhancements to their flagship sedan since its inception, but it would remain the same until a total redesign in 2001.
The new engine was a four cam 4.0 liter V-8, enhanced by a clever technology called Variable Valve Timing + intelligence. VVT+i supplied the V-8 with additional power, while lowering emissions and improving fuel economy. The 290 horsepower engine was again teamed with 5-speed automatic, working together to provide a very smooth transition from 0 to 60 mph in just 6.5 seconds. The LS's fuel efficiency was rated at 19/25 mpg.
The rear wheel drive sedan was now available with a Vehicle Skid Control system, which helped to limit nervous moments when driving on slick roads and through tight turns. While the LS 400 was very quick, quiet, and smooth, its focus on comfortable cruising left some eager drivers disappointed. The interior layout and finish, premium Nakamichi sound system, and plush ride were all atop the list of favorite features.