To put a spark in painfully sluggish sales, Buick added 11 inches to the long-lived Riv's length for 1989. Buick also dumped the touch-screen climate and audio controls. A driver-side airbag now was standard, but antilock braking remained an option until '91. GM's Pass-Key antitheft system was standard. Only one powertrain went into Rivieras: a 3.8-liter V6 with automatic. A Gran Touring suspension with wider tires and quicker-ratio power steering was optional. The Riviera's basic design was shared with the Cadillac Eldorado and Oldsmobile Toronado.