Buick replaces its Century and Regal sedans for 2005 with a slightly larger version of their basic front-drive design. LaCrosse offers 5-place seating with front buckets or 6-passenger seating with a flip-and-fold front center seat. Three trim levels are offered: CX and step-up CXL use a 200-hp 3.8-liter V6, the top-line CXS has a 240-hp 3.6-liter V6. It comes with a sportier suspension and 17-inch wheels vs. the others' 16s. All use a 4-speed automatic transmission. Every LaCrosse has 4-wheel disc brakes. ABS and traction control are standard on CXS, optional on the others. An antiskid system is an exclusive CXS option. Head-protecting curtain side airbags are optional on all; torso side airbags are unavailable. CXL and CXS have leather upholstery. Optional on CX and standard on the others are a tilt/telescope steering wheel, dual-zone automatic climate control, and a split folding rear seatback. Remote engine start and a sunroof are optional on all.