Mexico's motor industry built 14% fewer vehicles in November compared with a year ago amid economic uncertainty and weak demand from the United States, the Mexican Automotive Industry Association (AMIA) said on Tuesday, according to Reuters.

AMIA reportedly said Mexico produced 121,966 vehicles in November, down from the 141,379 in the same month of 2002.

"Doubts over (tax) reform hurt foreign exchange (rates) and consumer confidence," AMIA said in a statement cited by the news agency.

Reuters noted that the Mexican peso fell to a record low close against the dollar last week as a controversial tax plan proposed by President Vicente Fox saw little hope of being accepted by Congress. The peso finished at 11.39 per dollar on December 1, its weakest ever, the report added.

Reuters said uncertainty about the outcome of the proposed tax reform package has kept financial markets on edge and led many consumers to delay purchases, including cars.

Exports by Mexico-based carmakers reached 87,287 units in November, down 19% from the 107,277 vehicles exported a year ago, Reuters said, adding that the AMIA expected December sales to reach levels similar to those in December 2002, 960,000 units by year-end.

Sales to Mexican buyers rose 4.2% to 83,560 units in November, the report said.