2018-2024 INFINITI QX80 Tailgate: Decoding Cameras, Options, and Failures

Variant Differences: The Smart Rearview Mirror is Key

The most significant source of confusion when replacing a 2018-2024 QX80 tailgate is the compatibility of its electronic components. The primary difference depends on whether the vehicle is equipped with the Smart Rearview Mirror. This feature uses a dedicated, high-mounted camera to display a live video feed in the rearview mirror, bypassing obstructions like passengers or cargo. This system requires a different camera and wiring harness than the standard backup camera.

Here’s a breakdown of the key compatibility points:

• Vehicles WITH Smart Rearview Mirror: These models have a second camera mounted high on the tailgate, near the third brake light. The tailgate assembly has a specific wiring harness to accommodate this extra camera.
• Vehicles WITHOUT Smart Rearview Mirror: These models only have the standard backup camera located above the license plate. The wiring harness is simpler and will not have the connector for the Smart Mirror camera.

Before purchasing a used tailgate, you must determine if your QX80 has this option. You can check by flipping the switch at the bottom of your rearview mirror; if it toggles between a regular mirror and a video screen, you have the Smart Rearview Mirror.

Symptoms of Failure

A failing QX80 tailgate can present several symptoms, ranging from minor annoyances to significant operational failures.

• Power Liftgate Inoperative: The tailgate may not open or close when using the key fob, interior button, or the button on the tailgate itself. This can be caused by a faulty switch, a bad liftgate motor, a failed latch actuator, or even a simple setting. A common oversight is the power liftgate master switch on the driver's side dashboard; ensure it is in the 'ON' position.
• Grinding or Whining Noises: Unusual sounds during operation often point to a failing power lift strut motor.
• Tailgate Won't Latch or Pulls Shut Weakly: If the tailgate closes but doesn't pull itself tight, the pulldown motor in the latch assembly may be failing. You might hear clicking sounds without the final cinching action.
• Tailgate Drifts Down or Won't Stay Open: This is a classic sign of weak or failed lift support struts. While the power struts assist with opening, the gas-charged struts are responsible for holding the weight.
• Camera or Sensor Malfunctions: A blank or flickering screen for the backup camera or Smart Rearview Mirror can indicate a failed camera, but it is often caused by a damaged wiring harness where it flexes between the body and the tailgate.

Buying a Used 2018-2024 QX80 Tailgate: A Step-by-Step Guide

Purchasing a used OEM tailgate is an excellent way to save money, but careful inspection is crucial to ensure you get a good part that fits correctly.

Step 1: Verify Your Vehicle's Options

As detailed above, the most important step is to confirm if your QX80 has the Smart Rearview Mirror. This will determine which tailgate assemblies are compatible with your vehicle. Do not rely on trim level alone; verify the feature's presence on your specific vehicle.

Step 2: Physical Inspection Checklist

When inspecting a used tailgate, check the following:

• Shell Condition: Look for major dents, deep scratches, and signs of previous bodywork (e.g., inconsistent paint texture, filler). Check for rust, especially around the window seal, license plate area, and bottom edge.
• Glass: Ensure the rear window and any quarter glass are free of cracks and deep scratches. Check that the defroster lines are intact.
• Wiring Harness: This is a critical check. Carefully inspect the rubber boot that protects the wires running from the vehicle body to the tailgate. Peel it back if possible and look for cracked, frayed, or repaired wires. Damaged wiring is a common failure point and difficult to repair correctly.
• Included Components: Clarify exactly what is included. Does it come with the latch, cameras, wiper motor, and lights? A 'bare' shell will require you to transfer all your old components, increasing labor time and risk of damage.

Step 3: Match Part Numbers and Connectors

Known Issues, TSBs, and Recalls

While there are no recalls for the tailgate structure itself, several recalls and common issues relate to its components:

• Rearview Camera Recalls: Multiple recalls have been issued for the 2018-2024 QX80 concerning the rearview camera image not displaying or freezing. These are typically resolved with a software update from a dealer and may not be related to the tailgate hardware itself, but it's important to be aware of.
• Electrical System Glitches: Some owners report general electrical issues, which can sometimes affect power liftgate operation. These can be complex to diagnose and may stem from the Body Control Module (BCM) or wiring.
• Wiring Harness Damage: As mentioned, the wires inside the flexible conduit between the body and tailgate are prone to breaking over time from repeated opening and closing. This can cause a variety of issues, from camera failure to the liftgate not working at all.

Cost of Replacement

The cost to replace a QX80 tailgate can vary significantly based on whether you buy a complete assembly or individual components.

Note: Prices are estimates and do not include painting, taxes, or fees. A used assembly often provides the best value if the paint color matches or is being repainted anyway.

Installation Guide & Difficulty

• Difficulty Rating: 4 out of 5
• Estimated Time: 3-5 hours
• DIY Feasible: Yes, for experienced mechanics.

Replacing the entire tailgate assembly is a challenging job that requires at least two people due to its weight and bulk. The process involves:

1. Disconnecting the battery.
2. Removing all interior trim panels from the tailgate.
3. Carefully disconnecting all electrical harnesses and the washer fluid tube.
4. Supporting the tailgate's weight while unbolting the main hinge bolts and power lift struts.
5. Transferring components (latch, camera, lights, etc.) if the replacement is a bare shell.
6. Installation is the reverse of removal. Care must be taken to align the tailgate properly to ensure even gaps and proper latching.

Frequently Asked Questions (FAQ)

Technical Specifications & Part Numbers

The following are some of the OEM part numbers associated with the 2018-2024 QX80 tailgate assembly. Note that part numbers can change and vary based on the specific options and production date.