The much-publicized cash for clunkers program gave a shot of adrenaline to car sales this summer, inspiring purchases even from consumers who did not participate. With the $3 billion spent in moving people into more fuel-efficient vehicles, the question became, what would become of the market without the federal incentives? The answer: September sales figures show that all manufacturers saw a significant 35 to over 50 percent sales decrease compared to August. But--and here’s the good news--when compared to last September, a few manufacturers actually saw a sales increase, including Hyundai, Kia, and Subaru.

Here are the sales trends among the largest automakers:

Chrysler: Still struggling post bankruptcy, Chrysler saw a 42-percent decrease over last September and down 40 percent for the calendar year so far.

Ford: Helped by a sales surge from the redesigned Taurus, Ford showed only a small decrease of five percent over September 2008, but so far this year they are down 22 percent.

GM: Low inventory levels after the clunker program pushed General Motors to a decrease of 45 percent over last year and 36 percent decrease so far for 2009.

Honda: With a decrease in sales almost across the board (except the Pilot, which showed a small increase), Honda sales were down 23 percent over last year and 24 percent so far this year.

Hyundai: Continues to enjoy growth and increase market share. They reported a 27 percent increase over last September and a 1.4 increase year to date.

Nissan: Sales for September were down 7 percent over last year and 26 percent year to date. A number of vehicles, including the Nissan Maxima, 370Z, Pathfinder, and Frontier, as well as the Infiniti QX56, saw a gain over last year.

Subaru: Attributing its success to the redesigned Outback and Legacy models, Subaru saw an increase of 1 percent over last September and continues to have the highest sales percent increase of any manufacturer--up 10 percent for the calendar year so far.

Toyota: Overall sales were down 16 percent from last year and 27 percent year to date, but the Lexus division saw an increase of 7 percent over September 2008.

Even with help from last month’s cash for clunkers program, manufacturers are still struggling this year. As they enter the fourth quarter, we should see some more promotions and rebates to help drive up sales before the end of the year.

—Liza Barth