Automakers made fewer vehicles in January as they tried to clear inventories that built up when new-car sales slumped badly in late 2008.
Production fell 39.0 percent to 1.03 million units compared with the same period last year, according to estimates from J.D. Power Automotive Forecasting.
The carmakers that reduced their production the most in January were Dacia, Renault, Toyota, Volvo and Opel/Vauxhall.
Dacia production was down 74.0 percent, Renault 46.5 percent, Toyota 49.3 percent and Volvo 47.4 percent.