When you put your car in park, you expect it to stay in place. Unfortunately for some Porsche owners, that might not actually happen.

As a result, the automaker is recalling 99,665 Cayenne and Panamera models in the United States. According to a notice posted by the National Highway Traffic Safety Administration, the models are equipped with a bushing that can degrade over time and eventually detach altogether. That’s a serious issue as the bushing attaches the gear selector to the gearbox.

If the bushing fails, the driver could ‘shift’ the vehicle into park but the transmission wouldn’t necessarily be in park. This obviously increases the risk of a collision as the vehicle could potentially rollaway.

The recall is slated to begin in August and owners will need to take their vehicle to the dealership to have a new shifter cable bushing installed. For the time being, Porsche is advising owners to use the parking brake until the repairs have been completed.

A number of different models are affected including the 2004-2006 and 2008-2010 Cayenne, 2003-2006 Cayenne S, 2003-2006 Cayenne Turbo and 2006 Cayenne Turbo S. The recall also impacts the 2011-2016 Panamera and Panamera 4 as well as the 2010-2016 Panamera S, Panamera 4S and Panamera Turbo. Other models affected include the 2012-2016 Panamera Turbo S and 2013-2016 Panamera GTS.

The filing notes the incident came to light in December of last year after “several field incidents.” An investigation was then launched in January to determine the cause of the issue and Porsche eventually discovered several additional incidents which could have been caused by the bushing. There’s no word on how much incidents have been identified, but Porsche said none of them caused any injuries or property damage.