Replace the air suspension height sensor on the front or rear suspension to restore proper ride height control and suspension system function.

Warnings

Tools required

Parts

• Air suspension height sensor × 1 — Use OEM specification
• Sensor mounting hardware × 1 — Often included with sensor

Preparation

1. Park vehicle on level ground and engage parking brake
2. Place wheel chocks behind wheels that will remain on the ground
3. Turn ignition off and remove key
4. Use a scan tool to place air suspension in diagnostic/service mode to vent air from the system if available
5. Disconnect negative battery cable and wait 2 minutes
6. Locate the height sensor on the affected corner of the vehicle - front sensors mount to lower control arm area, rear sensors mount near axle

Procedure

1. 1

   Raise and support vehicle
   Loosen wheel lug nuts. Raise the corner of the vehicle where the sensor is located using a floor jack. Support the vehicle on jack stands placed at the manufacturer-recommended lift points. Remove the wheel completely.
2. 2

   Disconnect sensor electrical connector
   Locate the height sensor electrical connector near the sensor body. Press the locking tab and carefully disconnect the wiring harness connector. Inspect the connector for corrosion or damage. If corrosion is present, clean with electrical contact cleaner.
3. 3

   Document sensor link arm position
   Before removing the sensor, note the position and orientation of the sensor link arm. Take a photo if possible. The link arm connects the sensor to the suspension component and must be reinstalled in approximately the same position for proper calibration.
4. 4

   Disconnect sensor link arm
   Locate the ball joint or clip connection where the sensor link arm attaches to the suspension component (typically lower control arm on front, axle bracket on rear). Remove the retaining clip or fastener. Carefully disconnect the link arm from the suspension mount point. Note any washers or spacers for reassembly.
   ⚠The link arm may be under light spring tension. Control the arm as you disconnect it to prevent it from snapping free.
5. 5

   Remove sensor mounting fasteners
   Remove the mounting bolts securing the height sensor body to its bracket on the frame or suspension component. There are typically 2-3 bolts. If bolts are corroded, apply penetrating lubricant and allow to soak before removal. Support the sensor as you remove the last bolt.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
6. 6

   Remove height sensor
   Carefully remove the height sensor assembly from the vehicle. Inspect the mounting bracket for damage, cracks, or excessive corrosion. Clean the mounting surface with a wire brush if necessary. Verify the new sensor matches the old unit in mounting configuration and connector type.
7. 7

   Install new height sensor
   Position the new height sensor on the mounting bracket, aligning the mounting holes. Install the mounting bolts finger-tight initially to allow for positioning adjustment. Ensure the sensor body is oriented correctly with the link arm connection point accessible.
8. 8

   Torque sensor mounting bolts
   Using a torque wrench, tighten the sensor mounting bolts to specification. Ensure the sensor is seated flush against the mounting bracket and does not shift during tightening.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
9. 9

   Connect sensor link arm
   Attach the sensor link arm to the suspension mount point, referencing your earlier documentation of the arm position. Install any washers or spacers in their original positions. Secure with the retaining clip or fastener. The link arm should move freely through its range of motion without binding.
10. 10

    Reconnect electrical connector
    Connect the wiring harness to the new height sensor. Ensure the connector locks fully with an audible click. Gently tug on the connector to verify it is secure. Route the wiring away from any moving suspension components or heat sources.
11. 11

    Reinstall wheel
    Reinstall the wheel and thread all lug nuts by hand. Lower the vehicle until the tire just touches the ground but weight is still on jack stands. Tighten lug nuts in a star pattern to torque specification. Remove jack stands and lower vehicle completely to the ground. Perform final lug nut torque verification with weight on the wheel.
    Torque spec

    Wheel Lug Nuts156 Nm (115 lb-ft)
12. 12

    Reconnect battery and initialize system
    Reconnect the negative battery cable. Turn the ignition to the ON position without starting the engine. The air suspension system will perform a self-check. If equipped with air suspension controls, exit diagnostic mode and return the system to normal operation.

Reassembly

1. Ensure all electrical connections are fully seated and locked
2. Verify sensor link arm moves freely through full suspension travel range
3. Check that no wiring is pinched or routed near exhaust components
4. Confirm all mounting hardware is torqued to specification

Verification

• Start the engine and verify no air suspension warning lights remain illuminated on the instrument cluster
• Use a scan tool to check for stored diagnostic trouble codes related to the height sensor circuit
• Drive the vehicle at low speed and verify the air suspension adjusts ride height properly without errors
• Perform a visual inspection under the vehicle to confirm the sensor link arm is connected and the sensor is securely mounted
• Test the air suspension leveling function by loading the vehicle and observing proper height adjustment

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