Vacuum Pump Gasket Kit. Dorman# 904-335. Troubleshooting Problems. Backorders may occur. Left & Right is the orientation when sitting in the car (Left indicates Driver's side). Keep a copy of your order details and let us know as soon as you notice a problem.Warranty covers cost of part only, not cost of labor.
Since they are new, they do not contain any used components that could lead to premature failure. Most premature failures occur with the bearing. A bearing failure will prevent the pump from producing vacuum.