The intermediate steering shaft keeps the steering gearbox and steering wheel connected. The universal joint or also called as u-joint at the end of the steering shaft connects to the steering gearbox which has another u-joint that connects to the steering wheel allows for the angles between them to be supported resulting to your vehicle wheels smooth and easy turning. The intermediate steering shaft is an important component of your vehicle. It is considered unsafe to drive with a bad steering shaft on your 4.6L or 5.4L vehicle and may put other people's lives with you at risk as well. If you are experiencing strange sounds, loose steering wheel tilt, difficulty in turning or your steering wheel does not go back to the center after turning then you may have a problem with your intermediate steering shaft. Fits the following vehicles: 2007-2014 Expedition 2009-2014 F-150 2007-2014 Navigator Replaces part numbers: 8L1Z-3B676-A, 8L1Z3B676A This is a compatible replacement part manufactured by AA Ignition. This intermediate steering shaft is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this intermediate steering shaft fits.