Delorean Motor Co. is recalling all of the 1,715 luxury cars it has sold in the United States to correct a potential safety hazard, and Ford Motor Co. is recalling approximately 4,000 of its 1982 Thunderbird and Mercury XR-7 models equipped with 3.8-liter engines for a carburetor modification.

In the DeLorean cars, a nut securing the lower ball joint and stabilizer bar might vibrate loose. However, the company said it knew of no accident caused by the problem.

A company spokesman said the problem would take about 30 minutes to fix, at no cost to the owner.

The company, founded by former General Motors executive John DeLorean, builds the two-seater sports cars at a plant in Northern Ireland and sells them in the United States for about $25,000. The cars have a stainless-steel skin on a fiberglass-reinforced body and unusual gull-wing doors that open upwards.

Ford said tests have found carbon monoxide emitted by the engines in the Thunderbird and XR-7 models may exceed certification standards.

"The correction involves replacement of a carburetor part," said Robert Transou, manager of the service engineering office of Ford's parts and service division.

"There is no adverse effect on either the fuel economy or driveability of the vehicles."

Ford spokesman Paul Preuss said the excess carbon monoxide that may be emitted is of no danger to drivers of the vehicles, who will be notified by Ford of the recall.