The Ford Bronco is marketed as one of the most capable off-roaders on sale but an issue with its trick rear shocks has forced the automaker to issue a recall for almost 150,000 examples in the United States. While Ford doesn’t know of any accidents or injuries caused by the problem, it had received 551 warranty claims as of December 11.

There is a new recall at Ford, this time covering a very specific slice of the Bronco trim walk and concerning the possible failure of critical suspension pieces. The company doesn’t yet have a fix for the problem.