The 2015 Kia Rio's crankshaft position sensor is located right next to the oil filter housing on the underside of the vehicle. It's at the lower front end of the engine</br> near the transmission</br> facing the radiator. If You're looking to replace</br> it's a relatively simple job that should take You no more than twenty minutes for an experienced automotive enthusiast</br> and maybe an hour for a novice.