Ford Steering Knuckle Wheel Bearing O-Ring
Steering Knuckle O-Ring, Front Wheel
This should always be replaced to prevent vacuum leaks and automatic 4wd failure.
The “Fifty States Street Legal” icon means that this part has been determined by the California Air Resources Board (CARB) not to have an adverse effect on emissions when installed and used properly in the application(s) identified in the product description. Under EPA and CARB policy, such parts may be installed in vehicles driven on public roads and highways.