The contact owns a 2019 Subaru Crosstrek. The contact stated while taking the vehicle for a routine oil change. There were no warning lights illuminated. The independent mechanic informed the contact that the control arm was cracked. The contact stated had not experienced the failure. The vehicle was not repaired. The dealer was not made aware of the failure. The manufacturer was made aware of the failure. The failure mileage was approximately 20,500.