The Buick Estate was a line of full-sized station wagons manufactured by the Buick division of General Motors. As its premier luxury division, Cadillac, didn't offer a station wagon, the Estate was GM's most expensive and most fully equipped entry in the market.
Third generation (1977-1990)
In 1977, the Buick Estate was downsized and relaunched on General Motors' B-body. In 1979, an Estate Wagon Limited was offered with many previously extra cost options now included as standard. To further differentiate the Limited model, fenders included four VentiPorts (up from three) and the interior had loose pillow designed seating.
In 1980, body changes made the wagon more aerodynamic for better fuel efficiency. Also that year, the Electra Estate Wagon was introduced and replaced the Estate Wagon Limited while the 'base' model was now called LeSabre Estate Wagon. Exterior woodgrain applique was standard on the Electra Estate (but could be deleted for credit) and optional on the LeSabre Estate. The Buick 350 V8 engine was dropped from the options list and a 5.7 litre diesel 350 V8 was now available through 1985. The standard engine was the 5.0 litre Oldsmobile 307.
Although the Electra and LeSabre coupes and sedans had both switched to new front wheel drive platforms by 1986, the model names also continued to be used on the rear wheel drive wagons through 1989.
In 1990, its final year, the Electra and LeSabre model designations were dropped and the car was once again sold simply as the Estate Wagon. As with the Electra Estate in previous years, standard exterior woodgrain could be deleted for credit.
Although the Estate Wagon model was discontinued in 1990, the Estate trim designation continued on the full-size Roadmaster station wagons from 1991 to 1996. The Estate name was also applied to the top trim level of the mid-size Century station wagon (sold as the Regal station wagon in 1982 and 1983) and often included exterior woodgrain applique. Like the Roadmaster, the Century Estate continued to be sold through 1996.
Source: Wikipedia