The power steering pump line runs along the back of the engine. The AC lines are also in the rear of the engine compartment. The power steering line rubs the AC line and it rubbed a hole in the AC line. To replace the line set, you need to purchase the set of 4 lines for about $850.00 and it is labor intensive to repair, 4 to 5 hours (7 on the floor with jack stands) The line set goes from the engine compartment to the rear AC unit and heater core. You also need to drain the coolant system. The area where it rubs could / should have some type of retaining clip to keep these 2 hoses away from each other.