*Compatibility Chart
1, You can distinguish specific model of an automobile by VIN(Vehicle Identification Number).

2, VIN(Vehicle Identification Number) consists of total 17 English letters and arabic digits.

3, VIN does not include the letters I (i), O (o), and Q (q) (to avoid confusion with numerals 1 and 0).

Ford
Expedition Eddie Bauer Sport Utility 4-Door 4.6L 1997-2002
Expedition Eddie Bauer Sport Utility 4-Door 5.4L 1997-2002
Expedition XLT Plus Sport Utility 4-Door 4.6L 1997
Expedition XLT Plus Sport Utility 4-Door 5.4L 1997
Expedition XLT Sport Utility 4-Door 4.6L 1997-2002
Expedition XLT Sport Utility 4-Door 5.4L 1997-2002

Lincoln
Navigator Base Sport Utility 4-Door 5.4L 1998-2002

*Generation & Evolution:

Ford Expedition
UN93 First generation (1997-2002)
U222 Second generation (2003-2006)
U324 Third generation (2007-2017)
U553 Fourth generation (2018-present)

Lincoln Navigator
Based directly on the Ford Expedition
UN173 First generation (1998-2002)
U228 Second generation (2003-2006)
U326 Third generation (2007-2017)
U554 Fourth generation (2018-present)

*Platform Drive Layout:

Front Engine-Rear Wheel Drive Layout

*Removal Guideline:

CAUTION: Damage to the vehicle and air suspension system can be incurred if work is carried out in a manner other than specified in the instructions or in a different sequence.
To avoid the possibility of short circuits while working with electric components consult your owner's manual on how to disconnect your battery.
Consult your vehicle owner's manual, service manual, or car dealer for the correct jacking points on your vehicle and for additional care, safety and maintenance instructions. Under no circumstances should any work be completed underneath the vehicle if it is not adequately supported, as serious injuries and death can occur.

Removal Guideline:
1.Set steering to straight ahead.
2.Raise vehicle.
3.Remove rear wheel.
4.Remove air spring solenoid retaining-clip.
5.Rotate solenoid counterclockwise to the first stop, and then carefully pull out to vent the air pressure from the air spring. After air spring is deflated, turn again and remove solenoid from air spring.
6.With pliers, or a suitable hooked tool, remove the clip that secures the top of the air spring to the chassis. Note: to access the clip, go under the wheel arch, between the body of the vehicle and the chassis.
7.Remove the piston-to-axle spring seat clip. (Air spring is held in place with a round retainer clip under the piston cap. To unsnap clip, gently pry between the piston and the axle. Clip will unsnap when pressure is applied.)
8.Carefully remove air spring from the vehicle.
Seal off solenoid to prevent any dirt or grease from entering system.

*Installation Guideline:
Installation is in the reverse order of air spring removal. Use supplied o-rings for the air spring solenoid.

*Removal Warning & Notice:

  Vent all air pressure from the air suspension system prior to disconnecting or removing any air suspension components. It is dangerous to remove air suspension components while under pressure. Failure to follow this instruction may result in serious personal injury. 

  Any air spring which is unfolded must be refolded prior to being installed in a vehicle. Refer to the procedure. An incorrectly folded air spring could rupture, altering the handling characteristics of the vehicle. If a vehicle has been driven with an incorrectly folded air spring, a new air spring must be installed. Failure to follow these instructions may result in serious injury to vehicle occupant(s). 

  Failure to observe the following instructions may result in a sudden failure of the air spring or suspension system.
  Any rear spring which is unfolded must be refolded prior to being installed in a vehicle.
  The air spring refolding procedure should only be used for an air spring which has never supported the vehicle's weight while in the incorrectly folded position.
  Incorrectly folded air springs found on vehicles during pre-delivery inspection or after use must be installed new.
  Do not attempt to inflate any air spring which has been collapsed while uninflated from the rebound hanging position to the jounce stop.
  When installing a new air spring, care must be taken not to apply a load to the suspension until springs have been inflated using the air spring fill procedure.
  After inflating an air spring in the hanging position, it must be inspected for correct shape.
1.NOTE: The vehicle must be positioned on a suitable lifting device prior to deflating the air suspension system.
With the vehicle in NEUTRAL, position on a hoist until the wheel and tire assemblies are slightly above the ground. 
2.Using the scan tool, vent the air springs.
3.Remove the air spring retainer.
4.Detach the air spring from the rear axle.

5.Remove the air spring in the following sequence.

1.Disconnect the air spring solenoid electrical connector.

2.Compress the quick connect locking ring and pull out the air tube.

3.Remove the air spring.

*Frequently Asked Questions:
How to prevent the damage of air springs/How to extend the service life of air springs/struts etc.?
An air strut with separable air springs
If your vehicle offers a separable air suspension (Audi Allroad A6 C5, Mercedes-Benz W164, BMW X5, etc.), you should regularly (about once a week) lift the car to the maximum position, and remove dirt with a high-pressure cleaner (keep the cleaner at a distance to the air spring about 30 cm/12 inches, otherwise water pressure can damage the air spring). The highest position may vary depending on your model and regulation options. Therefore, please test this by trying the different modes available to you (Sport, comfort, dynamic, off-road) and choose the one that sets your vehicle to the highest position. The dirt will most likely be found under the fold of the pneumatic chambers. If you find a frozen layer of bitumen on the piston guide (the part of a strut on which the air spring is installed), it is recommended to clean it as well. Whenever possible, avoid riding on fresh asphalt, as fresh bitumen mixed with sand immediately results in a build-up of abrasives on the piston and in turn contributes to accelerated wear and tear of the air spring.
 

A complete air suspension shock
Many cars such as Mercedes W220 or W211 are set up with a complete air strut - shock absorber and air spring visually form a complete spare part. In many cases, you can easily recognize these by the metal cups with which the air spring is tightly mounted. To best avoid any damage, we highly recommend to regularly check the condition of the dust protection seals of the air strut.

What is the difference between an air spring and an air strut?

The air spring is a part of the air strut. Some vehicles (e.g. Mercedes ML) allow you to change the air spring separately. At our online shop you have the opportunity to buy either the whole air strut or only the air spring. For some type of vehicles it is not possible to change the air spring separately. In this case the whole air strut should be replaced.

Which side of my car is the Right and Left?

The right and left sides of an automobile are determined as if sitting in the car facing forward. Thus, the left side is on the left when sitting in the car facing forward, and the right side is on the right. For American cars, the driver’s side is on the left, and the passenger sits to the right of the driver. For cars in Japan, Britain, Ireland, the Bahamas and some other former British colonies -- where they drive on the left side of the road -- the passenger sits on the left side, and the driver (along with all the driving controls) is on the right.

*OEM Part Number:

3U2Z5580KA,3U2Z5580AA,
3U2Z5580BA,3U2Z5580PA

6L1Z5319AA   1L1Z5319AA

1L1Z5319BA  6L143B484AA 

4L1Z5319BB, 5L1Z5319AA 4J1005C

*Item Specifications:

1. Key Words: 3PCS Rear Air Suspension Spring Bag Compressor Dryer Kit For Ford Expedition RWD
2. Package Includes: 3PCS for Rear Left & Right Air Suspension Spring Bags & Air Suspension Compressor

Notes : Please double confirm the compatibility as well as the OEM number before purchasing.
Instruction is not included. Professional installation is recommended.