In December, the automaker recalled about 13,500 of the funky cars from the 2012 model year. Now it’s adding about 6,100 more, bringing the total to 19,600 in the U.S. The additional Velosters were built from July 4, 2011 through Oct. 31, 2011.
Hyundai said in December that it knows of no crashes from the problem, but five people suffered minor cuts.
The National Highway Traffic Safety Administration began investigating the cars in October after getting complaints from customers. The company traced the problem to a manufacturing defect that damaged the sunroof glass.
Hyundai says it will inspect and replace the glass if needed.