In Mexico's two-horse sales race, General Motors edged Nissan Motor Co. in October.
GM's sales slipped 3.6 percent compared with October 2004, and Nissan's sales fell 2.6 percent. But GM outsold Nissan 20,034 units to 18,360.
Nissan beat GM in September for the first time since December 2004.
With the two best-selling automakers' sales declining last month, Mexico sales were down 1.3 percent year over year to 90,107.
Third-place Ford Motor Co.'s sales dropped 2.1 percent last month.
Vehicles built outside Mexico continued to make up the lion's share of the market, holding 63.7 percent. Domestics had 36.3 percent.
The Nissan Tsuru was the top-selling domestically produced vehicle last month with 5,383 units, up 12.9 percent. The Chevrolet C2, which as recently as August was the No. 1 domestic car, dropped 31.6 percent to sales of 4,581.
GM is the best-selling automaker in Mexico through the first 10 months with 198,741 units, a 12.5 percent increase over 2004. Nissan ranked second with 179,969 sales, up 6.7 percent. Ford follows with 157,054, up 27.3 percent.
Production was up in Mexico 20.7 percent to 178,676 units.