The contact owns a 2016 Jeep Compass. The contact stated while driving 40 MPH, the vehicle repeatedly jolted and jerked, prompting the contact to discontinue driving the vehicle. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the crankshaft sensor. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Action Number: RQ22002 (Engine and Engine Cooling). The manufacturer was not notified of the failure. The failure mileage was unknown.