2014 Jeep Grand Cherokee Air Suspension Replacement Part 68029912AE Install Guide

If you own a 2014 Jeep Grand Cherokee with the Quadra-Lift air suspension system, you may eventually need to replace a failed component. One common replacement is part number 68029912AE, the front air spring strut assembly. This guide covers everything you need to know about this part and how to install it yourself.

Understanding Part 68029912AE

Part 68029912AE is the OEM (Original Equipment Manufacturer) front air spring strut assembly for the 2014 Jeep Grand Cherokee with Quadra-Lift. It includes the air spring, shock absorber, and upper mounting hardware in a single unit. This assembly is used on both the left and right front positions, though some vehicles may require a different part for the other side (verify compatibility).

Replacing the entire strut assembly is often simpler than rebuilding individual components. The 68029912AE is designed to match the original specifications, ensuring proper ride height and handling.

Symptoms of a Failing Air Suspension

Before replacing the 68029912AE, confirm it is the source of the problem. Common signs of a failed front air strut include:

• Vehicle leans to one side: Especially after sitting overnight.
• Rough or bouncy ride: Loss of damping from the shock absorber.
• Air compressor runs frequently: The system tries to compensate for a leak.
• Suspension warning light: A message like "Service Air Suspension" on the dashboard.
• Uneven tire wear: Caused by incorrect alignment due to sagging.

If you experience these issues and a leak is detected near the front strut, replacing the 68029912AE is likely the solution.

Step-by-Step Installation Guide

Installing a new front air strut on a 2014 Jeep Grand Cherokee requires mechanical experience. Below is a general outline. Always refer to a factory service manual for torque specifications and safety procedures.

Tools and Materials Needed

• New 68029912AE air spring strut assembly
• Jack and jack stands (or a lift)
• Socket set, wrenches, Allen keys
• Spring compressor (if needed, but many aftermarket struts are pre-compressed)
• Torque wrench
• Penetrating oil (like WD-40)
• Floor jack to support components
• Safety glasses and gloves

Preparation

1. Park the vehicle on level ground and disconnect the negative battery cable.
2. Raise the front of the vehicle using a jack and secure it on jack stands. Remove the front wheel.
3. With the key out, manually lower the air suspension by pressing the suspension control button (if possible) to release air pressure—otherwise, the system will depressurize when components are disconnected.

Removing the Old Strut

1. Locate the upper strut mounting bolts (usually three or four nuts under the hood, near the strut tower). Use penetrating oil if rusted.
2. Disconnect the air line from the top of the strut. Push the collar and pull the line straight out. Some air may escape—this is normal.
3. Disconnect the electrical connector for the ride height sensor (if present).
4. Remove the lower bolts connecting the strut to the steering knuckle. You may need to separate the tie rod end or sway bar link to gain access.
5. Carefully remove the old strut from the vehicle. Note the orientation of the top mount.

Installing the New 68029912AE

1. Position the new strut in place, ensuring the top mount aligns with the studs in the strut tower.
2. Install the upper nuts and tighten to manufacturer specifications (typically around 30 ft-lbs).
3. Reconnect the air line: push the line into the top fitting until it clicks. Pull gently to confirm it is locked.
4. Reconnect the electrical connector.
5. Install the lower bolts connecting the strut to the knuckle. Torque to spec (often 80-100 ft-lbs, plus an additional turn).
6. Reinstall the sway bar link and tie rod end if removed.

Post-Installation Steps

1. Reinstall the wheel and lower the vehicle to the ground.
2. Reconnect the battery.
3. Start the engine and allow the air suspension to re-inflate. The compressor will run and the vehicle will rise to normal height. Check for warning lights.
4. Test drive and re-torque the lower bolts after 100 miles.

Common Mistakes to Avoid

• Forgetting to depressurize: Always release air from the system before disconnecting lines to avoid injury.
• Using an incorrect torque: Overtightening can damage bushings, undertightening can cause loosening.
• Mixing up left and right: Although 68029912AE is often used on both sides, double-check your vehicle's compatibility.
• Ignoring the ride height sensor: If the sensor is damaged or not reinstalled correctly, the system may not level properly.
• Rushing the job: Air suspension components are sensitive; take your time to avoid leaks.

Cost Considerations

A single 68029912AE assembly typically costs between $250 and $400 from a dealer or online retailer. Aftermarket options may range from $150 to $300. While aftermarket parts may save money, quality can vary. OEM parts offer guaranteed fit and longevity but at a higher price.

If you choose to replace both front struts at the same time (recommended for even wear), you will need two assemblies—either both 68029912AE or a matched pair.

Other Options: Conversion Kits

If you frequently encounter air suspension failures, you might consider converting to a conventional coil-over suspension. Conversion kits include coil springs, struts, and sometimes necessary hardware to remove the air system entirely. This is a more permanent fix but changes ride characteristics. Cost can range from $800 to $1,500 for a full kit plus installation.

Final Recommendation

For most 2014 Jeep Grand Cherokee owners, replacing a failed front air strut with the OEM 68029912AE part is the most reliable choice. The installation is challenging but doable for an experienced DIYer. If you are not comfortable working on air suspension, have a professional shop perform the replacement. Always inspect the entire suspension system—struts, air lines, and compressor—to prevent future issues. Proper installation and maintenance will restore your Grand Cherokee's ride quality and safety.