Infiniti · Known Issues

2018 Infiniti QX80 Problems: 4 Known Issues

2018 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2018 Infiniti QX80 has 4 documented known issues, with 1 rated critical. The most serious is Hydraulic Body Motion Control System Leak ($500-$3,000 repair). Across all issues with published estimates, repair costs range from $500 to $3,000. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common Infiniti QX80 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2018 Infiniti QX80 has 4 documented issues. The most frequently reported are: Hydraulic Body Motion Control System Leak, Certification Label Lists Incorrect Gross Axle Weight Rating (Recall 26V455000), Rear Self-Leveling Air Suspension Sag from Air Spring Leak, Height Sensor, or Compressor Failure. Of these, 1 is rated critical and should be addressed promptly.

Is the Infiniti QX80 reliable?

The 2018 Infiniti QX80 has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: Hydraulic Body Motion Control System Leak. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Infiniti QX80 problems?

Repair costs for known Infiniti QX80 issues range from $0 to $3,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Hydraulic Body Motion Control System Leak, typically costs $500-$3,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2018-2026 Infiniti QX80 Hydraulic Body Motion Control System Leak?

The QX80 equipped with Hydraulic Body Motion Control (HBMC) develops fluid leaks from the hydraulic actuators and lines. The system uses high-pressure hydraulic fluid to control body roll, and seal degradation leads to leaks and reduced effectiveness. Repairs typically run $500-$3,000. Severity: high.

What is the 2014-2026 Infiniti QX80 Certification Label Lists Incorrect Gross Axle Weight Rating (Recall 26V455000)?

On QX80 vehicles fitted with 22-inch wheels, the Gross Axle Weight Rating printed on the certification label is incorrect and higher than the true rating. An owner loading the vehicle to the posted number — a realistic scenario on a three-row SUV used for towing, hauling, or fami… Repairs typically run $0-$0. Severity: medium.

What is the 2014-2022 Infiniti QX80 Rear Self-Leveling Air Suspension Sag from Air Spring Leak, Height Sensor, or Compressor Failure?

QX80 vehicles with the rear self-leveling air suspension develop a persistent rear sag that makes the truck look permanently loaded, and the failure usually cascades in a predictable order. The rubber air springs crack and leak with age, typically after five to seven years. The c… Repairs typically run $690-$3,000. Severity: medium.

What is the 2018-2026 Infiniti QX80 Infotainment System Slow Response?

The QX80 infotainment system exhibits noticeable lag when navigating menus, inputting destinations, and switching between audio sources. The aging hardware platform cannot keep pace with modern connected car expectations for a luxury SUV. Repairs typically run $0-$500. Severity: low.

2018 Infiniti QX80 Problems: 4 Known Issues

All 4 Known Issues

2018-2026 Infiniti QX80: Hydraulic Body Motion Control System Leak#

Common Symptoms

How to Fix

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2014-2022 Infiniti QX80: Rear Self-Leveling Air Suspension Sag from Air Spring Leak, Height Sensor, or Compressor Failure#

Common Symptoms

How to Fix

What you need to fix it

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2014-2026 Infiniti QX80: Certification Label Lists Incorrect Gross Axle Weight Rating (Recall 26V455000)#

Common Symptoms

How to Fix

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2018-2026 Infiniti QX80: Infotainment System Slow Response#

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How to Fix

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Other Infiniti Models

Frequently Asked Questions

What are the most common Infiniti QX80 problems?

Is the Infiniti QX80 reliable?

How much does it cost to fix common Infiniti QX80 problems?

What is the 2018-2026 Infiniti QX80 Hydraulic Body Motion Control System Leak?

What is the 2014-2026 Infiniti QX80 Certification Label Lists Incorrect Gross Axle Weight Rating (Recall 26V455000)?

What is the 2014-2022 Infiniti QX80 Rear Self-Leveling Air Suspension Sag from Air Spring Leak, Height Sensor, or Compressor Failure?

What is the 2018-2026 Infiniti QX80 Infotainment System Slow Response?