The 2004 Porsche Boxster S Anniversary Edition was a limited-edition model that commemorated the 50th anniversary of the Porsche 550 Spyder, which influenced the design of the Boxster. It was powered by a 3.2-liter horizontal six-cylinder that produced 264 horsepower. A six-speed manual transmission as standard, while a five-speed automatic Tiptronic transmission, with a gate for manual shifting, was optional.
Standard features for the Boxster S Anniversary Edition included air conditioning, power windows, power door locks, dual front and side airbags, leather seats, power heated mirrors, a keyless entry system, a power-adjustable driver's seat, a leather-trimmed steering wheel, and an AM/FM stereo system with an in-dash CD player.
The Boxster S Anniversary Edition also came with heated front seats, a trip computer, traction control, bi-xenon high-intensity headlights with headlight cleaners, a rear spoiler, four-wheel anti-lock brakes, and a power convertible top.
One of the few upgrades for 2004 was the addition of a sports exhaust system to the list of options.
Drivers thought the Boxster S Anniversary Edition was a worthy addition to the Porsche lineup. They praised the Boxster S's quickness, handling, reliability, suspension, and even its stereo system. Though most Boxster drivers found little to complain about, some would have liked to have had a little more legroom and storage space.