The INFINITI QX80, a luxury full-size SUV known for its bold styling, spacious interior, and powerful V8 engine, offers a high-end driving experience with ample seating for families and impressive towing capabilities. However, even as a luxury SUV, the QX80 from 2018-2021 has several reported issues that prospective buyers and current owners should know about. This article will provide an in-depth look at the common problems reported with this model, tips on what to check when buying, and an overview of ownership costs.
Common Problems with the 2018-2021 INFINITI QX80
1. Transmission Issues and Delayed Shifting
A common problem reported with the QX80 is transmission hesitation, particularly in the 7-speed automatic transmission. Some owners experience delays when shifting from park to drive, and others report sluggish acceleration or rough shifts between gears. The transmission may also hesitate when accelerating from a stop, creating an unpredictable and less-than-smooth driving experience. This issue can make city driving frustrating and may affect the vehicle’s performance over time.
Signs and Prevention: Look out for any hesitation, jerking, or rough shifts during a test drive. Regular transmission servicing, including timely fluid changes, can help mitigate some transmission issues, but chronic problems may require a more in-depth transmission inspection or repair.
2. Suspension Problems and Premature Wear
The QX80’s suspension is designed to balance comfort with handling, but some owners report early wear of suspension components like control arms, bushings, and shock absorbers. Suspension problems may manifest as increased noise, a rougher ride, or less responsive handling, especially when driving over rough or uneven surfaces. This can be a costly repair for an SUV of this size and class.
Signs and Prevention: Listen for any clunking or squeaking sounds when driving over bumps or during turns, which can indicate worn suspension components. Also, check for signs of uneven tire wear, which could suggest suspension alignment issues. Regular inspection of suspension components during service can help catch early signs of wear before they worsen.
3. Fuel Economy and Engine Performance Concerns
While the QX80’s 5.6-liter V8 engine delivers substantial power, it also demands high fuel consumption, a frequent concern for owners. Some QX80s may experience engine performance issues, such as rough idling or occasional misfires, particularly if they’re not regularly maintained. High fuel consumption can become costly, especially if the vehicle is frequently used for city driving or long-distance trips.
Signs and Prevention: On a test drive, ensure the engine runs smoothly, without hesitation, knocking, or excessive vibration. To improve fuel efficiency and engine performance, keep up with routine maintenance such as oil changes and air filter replacements, and use premium fuel as recommended by INFINITI for optimal performance.
4. Infotainment System Glitches and Freezing
Many QX80 owners have reported glitches with the infotainment system, including the screen freezing, Bluetooth connectivity issues, and slow responsiveness. The QX80’s infotainment, though luxurious, sometimes struggles to keep up with the expectations of a luxury vehicle. Some drivers also experience navigation errors and limited compatibility with newer smartphone systems, which can impact the quality of the infotainment experience.
Signs and Prevention: Test the infotainment system, checking for responsiveness, and make sure that all functions work as intended. Updating the system software can sometimes improve performance, but severe issues may require replacement or service from an INFINITI dealer.
5. Premature Brake Wear
The QX80’s heavy curb weight can lead to premature brake wear, particularly on the front brakes, as they do most of the stopping work. Many owners report needing to replace brake pads and rotors more frequently than expected, especially if they regularly tow heavy loads. Premature brake wear can affect stopping performance and may increase maintenance costs over time.
Signs and Prevention: Listen for any squeaking or grinding sounds when braking, which could indicate worn brake pads. During a test drive, ensure the braking feels responsive and smooth. Regular brake inspections and using high-quality brake components designed for larger SUVs can help extend brake life.
6. AC Compressor Failures and Climate Control Problems
Another issue that some QX80 owners encounter is with the air conditioning system, specifically the AC compressor. Compressor failure can lead to a lack of cooling, which can be particularly uncomfortable given the QX80’s large cabin. Additionally, climate control inconsistencies, such as uneven cooling or problems with rear-seat temperature control, have been reported.
Signs and Prevention: When inspecting a used QX80, test the air conditioning and heating in both the front and rear seats. Make sure the climate control system responds accurately and provides even cooling or heating throughout the cabin. Regular AC maintenance, including replacing cabin air filters, can help keep the system in good working order.
7. Body Roll and Stability Control Sensitivity
Given its height and size, the QX80 can exhibit noticeable body roll, especially in sharp turns or at high speeds. While body roll is typical for many large SUVs, some QX80 owners find the stability control system overly sensitive, leading to unwanted braking or adjustments during spirited driving. This sensitivity can feel intrusive and detract from the driving experience.
Signs and Prevention: During a test drive, test the vehicle’s handling in turns and at various speeds. Pay attention to any intrusive stability control engagement, which may indicate a sensitive system. Though no specific maintenance is needed for this issue, adjusting your driving style to account for the QX80’s weight and high center of gravity can help manage body roll more comfortably.
Buying Tips: What to Look for in a 2018-2021 INFINITI QX80
Service Records: Check that the vehicle has a documented service history, especially for routine maintenance and any transmission or suspension repairs. A well-maintained QX80 is likely to perform better and have fewer problems in the long run.
Transmission and Brakes: During a test drive, assess the transmission’s performance, paying attention to shifting smoothness and any delays. Ensure the brakes feel responsive, with no unusual noises or vibrations.
Infotainment System Functionality: Test the infotainment screen, navigation, and Bluetooth connectivity. Any slow response or freezing could indicate software issues that may require dealer attention.
Check for Recalls: INFINITI may have issued recalls for certain issues on the QX80, so check with the seller or a dealer to ensure any relevant recall work has been completed.
Cost of Ownership: Is the 2018-2021 INFINITI QX80 Expensive to Own?
Fuel Consumption
The QX80’s fuel economy is relatively low compared to smaller or hybrid SUVs, with an average of 15-19 MPG. Due to its size and weight, this fuel consumption level is typical for luxury SUVs in its class, though it can become expensive for drivers covering a lot of miles annually.
Maintenance and Repair Costs
Maintenance for the QX80 can be higher than average, especially as the SUV ages. Transmission, brake, and suspension repairs can be costly, and premium fuel adds to fuel expenses. INFINITI vehicles often require specific parts and servicing, so repairs can be more expensive than non-luxury vehicles, especially at dealerships. However, independent mechanics familiar with luxury vehicles may offer more affordable maintenance options.
Insurance and Depreciation
Luxury SUVs like the QX80 tend to have higher insurance premiums due to their size, features, and repair costs. Depreciation is also a factor; while the QX80 holds value relatively well compared to some competitors, luxury vehicles tend to depreciate faster than mainstream models. Special trims or models with additional features may retain slightly better resale value.
Potential Extra Costs
Owners in hot climates or those who use the QX80 for towing may need to budget for additional AC maintenance or brake and suspension repairs. Extended warranties can be helpful to cover certain high-cost repairs, especially for transmission and suspension issues common in older models.
Conclusion
The 2018-2021 INFINITI QX80 combines luxury, power, and space, making it an attractive option for families and those who need ample room and towing capacity. However, it comes with several common issues, particularly in its transmission, suspension, infotainment, and brakes. By knowing these potential problems and following our buying tips, prospective owners can make an informed decision, ensuring they purchase a QX80 that delivers on luxury without breaking the bank on repairs.