From a distance my answer is "potentially." if bubbles are being introduced then the pump is causing atmosphere to enter the system but that could be from anywhere in the system, not solely from the pump body itself. If bubbles existed because the system ran low and someone fixed the leak, top off the level, raise the front safely on jack stands, and saw at the wheel repeatedly to work the air out. If bubbles existed because there is a leak that nobody fixed, find and fix the leak first. If bubbles existed because someone changed the fluid but didn't get rid of them, get rid of them as above.
Find out which, why, and them fix it as stated.