DETROIT ? Twenty years after Baby Boomers fell in love with the minivan and made it part of America’s suburban landscape, the breadbox on wheels has been largely pushed aside by a surge in the popularity of SUVs.

But with the yearly U.S. market for minivans still 1 million strong, automakers plan to roll out at least a half-dozen new minivan offerings in the next year or two. Ford Motor Co. unveiled its two new models — the Mercury Monterey and Ford Freestar — at the Chicago Auto Show, which opened Friday.

When Chrysler introduced its first family hauler in 1983, many Boomers were in the prime years of carting their progeny from school to activities. The roomy vans soon became favorites among soccer moms and helped save Chrysler from bankruptcy.

These days, people in their 20s and 30s — and even aging Baby Boomers — are more often opting for sport utility and so-called crossover vehicles, which tend to be more rugged and stylish.

SUVs, despite increasing criticism of their fuel-efficiency and safety records, and crossovers comprised some 25 percent of U.S. light vehicle sales last year. Minivan shares, meanwhile, fell to 6.7 percent, its worst performance since 1989. The minivan segment peaked at 8.2 percent in 1994 and 1995.

That’s a sizeable chunk of sales that none of the automakers want to cede in an increasingly competitive domestic market. That’s why General Motors Corp., Toyota Motor Corp. and Nissan Motor Co. also plan new versions of the minivan in the next year or two.

“There are some good offerings out there, but I think consumers have gotten bored with them,” said Mike Wall, an analyst with the automotive forecasting firm IRN Inc. “What you’re seeing is a move to freshen up the vehicles. No one’s going to gain a ton of market share.”

Chris Theodore, Ford’s vice president of North American product development, said creating an attractive product was important, but Ford’s emphasis on the new upscale Monterey and the more mainstream Freestar was the interior — more storage space, a quieter ride, a general refinement to the features.

Blake Crane, a lawyer in Lake Worth, Fla., said he and his wife, Cathy, bought a Mazda MPV minivan about a month ago after looking at two Ford SUVs.

Crane, 35, said the couple, who has a 20-month-old baby, opted for the minivan because it was easier to handle, easier to park and easier to get in and out of through the sliding doors.

“It’s clearly a van — there’s no getting around that,” Blake Crane said. “But it’s not boxy and I don’t think it looks any less sporty than a normal SUV. Your Explorer or Suburban certainly isn’t an imaginative style.”

The 2004 Nissan Quest

Nearly every other major automaker has jumped into the market since the first Dodge Caravan rolled off Chrysler’s Windsor, Ontario, assembly line on Nov. 2, 1983. Chrysler remains the dominant player at some 36 percent of the U.S. market. The company expects to produce its 10 millionth minivan later this year.

Foreign transplants, however, are gaining ground among minivan buyers. Honda Motor Co. sold about 153,500 of its Odyssey minivans last year — 4,600 more than the Ford Windstar. Honda entered the market in 1998.

“The transplants are traditionally late to the game … but somehow they’re able to really hone in. The Odyssey is a good example,” Wall said.

At Detroit’s North American International Auto Show last month, Toyota and Nissan both showed off new versions of their minivans that Wall said are likely to hurt domestic rivals.

Toyota’s 2004 Sienna, which goes on sale next month, has more interior space, power and fuel economy than earlier models. The Japanese automaker says it hopes to sell 120,000 in the first year of production — 40,000 more than ’02.

Nissan plans to start selling its new Quest in July. It features the first Bose audio system designed for a minivan, a DVD entertainment system and two vertical skylights.

Earlier this month, GM said it will revamp its Chevrolet and Pontiac minivans and, for the first time, offer Saturn and Buick models starting in 2005.

Ford, which has seen its minivan market share shrink from 17 percent in 2001 to just under 15 percent last year, will debut its new Monterey and Freestar, which replaces the Windstar, at the Chicago Auto Show. The new vehicles will be in dealerships later this year.