A bill to amend the National Traffic and Motor Vehicle Safety Act of 1966 to establish procedures under which any person may petition for an investigation (including testing and inspection) regarding any automobile manufacturing's certification of compliance with vehicle safety standards, and to permit suspension of importation of vehicles pending the outcome of such investigation.

Amends the National Traffic and Motor Vehicle Safety Act of 1966 to authorize any person to file a petition with the Secretary of Transportation which: (1) questions standards provided by manufacturers (or distributors); and (2) requests an investigation regarding such certification.

Requires the Secretary to: (1) grant or deny such petition within a specified time; (2) publish the reasons for any denial in the Federal Register; or (3) investigate the validity of a certificate or the basis on which it was made, if the petition is granted.

Authorizes the Secretary to restrict importation into the United States or into interstate commerce of motor vehicles whose certification is under investigation.