Nissan and Ford found that the original equipment headlight stainless steel bulb terminals may over time cause elevated contact resistance and overheat the electrical connector housing.this can result in a headlight flickering, bulb outage and heat deformation to the headlight connector.in April 1999, the supplier of the headlight for Nissan and Ford changed to a bulb using the stainless steel terminals that did not meet original specifications.on July 17, 2000, the supplier began using a bulb meeting the vehicle manufacturer's specifications.this problem can affect independently either headlight but does not cause simultaneous failure of both headlights. The problem also does not affect front parking lamps.as a result, the complaints typical report single failure of one headlight.there are no crashes or loss of vehicle control reported.a safety-related defect trend has not been identified at this time and further use of Agency resources does not appear to be warranted.the closing of this investigation does not constitute a finding by NHTSA that no safety-related defect exists.the Agency reserves the right to take further action if warranted by the circumstances.