I have a 2006 Acura TSX and my serpentine belt keeps popping off the steering pump but I bought a new a/c compressor, water pump, and pulley but still pops off not sure if I have to get a new steering pump
Your belt may no longer be fitting after all you've replaced. Check your belt tensioner to see if the tension is still within range. You may now need a different size belt.
Check that the new pulley fits your belt and that ALL pulleys are aligning with each other. If one pulley is a little off that will be enough to throw the belt off. Also check that all pulleys are still tight and not a little loose.