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2021 Infiniti

QX80 4WD

Auto (S7), 8 cyl, 5.6 L, SIDI; MDPV (Curb Weight >6000 lbs)

Infiniti QX80: best and worst years
2021 Infiniti QX80 4WD (photo 1 of 2)

Photo may show a different model year; you're viewing the 2021.

PhotoTokumeigakarinoaoshimaCC BY-SA 4.0Wikimedia Commons

Overview

Body
Standard Sport Utility Vehicle 4WDEPA, from EPA, last updated 6/22/2026
Drivetrain
4-Wheel DriveEPA, from EPA, last updated 6/22/2026
Transmission
Automatic (S7)EPA, from EPA, last updated 6/22/2026
Powertrain
GasEPA, from EPA, last updated 6/22/2026
Fuel
PremiumEPA, from EPA, last updated 6/22/2026

Engine & performance

HP
400
Power to weight
0.068 hp/lb
Axle ratio
2.94
Cyl
8EPA, from EPA, last updated 6/22/2026
Aspiration
Naturally aspiratedEPA, from EPA, last updated 6/22/2026
Start-stop system
NoEPA, from EPA, last updated 6/22/2026

Efficiency

MPG Hwy
19 mpgEPA, from EPA, last updated 6/22/2026
MPG City
13 mpgEPA, from EPA, last updated 6/22/2026
MPG Comb
15 mpgEPA, from EPA, last updated 6/22/2026
Fuel $/yr
$5,150EPA, from EPA, last updated 6/22/2026
CO₂
593 g/miEPA, from EPA, last updated 6/22/2026
Eco Score
2/10EPA, from EPA, last updated 6/22/2026
Smog score
3/10
Elec. Range
0 miEPA, from EPA, last updated 6/22/2026
SmartWay certified
No

Dimensions & capacity

Length
210 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Width
80 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Height
76 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Wheelbase
121 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Curb Weight
5,889 lbNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026

Safety NHTSA, model year

Overall crash rating
★★★★
Rollover rating
★★★★★
Stability control (ESC)
Standard
Forward-collision warning
Standard
Lane-departure warning
Standard
Recalls
2
Owner complaints
6

Reported problems NHTSA owner complaints, model year

  • ENGINE22%
  • VEHICLE SPEED CONTROL22%
  • EXTERIOR LIGHTING11%
  • FUEL/PROPULSION SYSTEM11%
  • POWER TRAIN11%
  • UNKNOWN OR OTHER11%

Source: NHTSA owner complaints, 9 total.

Infiniti QX80: best and worst years

Known issues manufacturer service bulletins, model year

98 service bulletins filed with NHTSA for this model year

  • Apr 13, 2026STRUCTURE:BODYITB09-063C

    CERTIFICATION LABEL AND VIN PLATE REPLACEMENT SERVICE INFORMATION Because of collision damage or other vehicle repair, a replacement “Certification Label” or “VIN Plate/Label” may be needed. HINT: Certification Label = FMVSS (Federal Motor Vehicle Safety Standards) label. These items may be available from Infiniti by request if certain criteria are met. This bulletin lists the criteria and provides an application form for such replacements. · The “VIN Plate/Label” (metal plate or vinyl label) is

  • Feb 20, 2025FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKINGITB23-023A

    AEB WARNING LIGHT IS ON WITH WARNING MESSAGES DISPLAYED ON COMBINATION METER APPLIED VEHICLES: 2015-2024 Q50 (V37) 2015-2018 Q50 Hybrid (HV37) 2017-2022 Q60 (CV37) 2015-2019 Q70 (Y51) 2015-2018 Q70 Hybrid (HY51) 2019-2024 QX50 (J55) 2022-2024 QX55 (FJ55) 2015-2021 QX60 (L50) 2022-2024 QX60 (L51) 2015-2019 QX60 Hybrid (L50H) 2015-2024 QX80 (Z62) SERVICE INFORMATION The AEB system is designed to turn itself OFF during driving conditions (e.g., rain, snow, fog, etc.) that obstruct its sensors. This

  • Sep 19, 2024SEAT BELTSITB22-021C

    SERVICE INFORMATION In the APPLIED VEHICLES, there are a variety of Seat Belt Warning Lights and Chimes. Refer to the information in this bulletin, along with the related vehicle owner’s manual. Figure 1 Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe that a described condition may a

  • Sep 19, 2024AIR BAGSITB19-024D

    DTC B00A0-00 STOREIF YOU CONFIRM DTC B00A0-00 (OCCUPANT DETECTION SENSOR UNIT) is stored, AND OCS zero point reset cannot be performed, (continued on the next page)D

  • Aug 15, 2024ELECTRICAL SYSTEMITB22-020B

    TELEMATICS CONTROL UNIT RESET AFTER AUTOMATIC COLLISION NOTIFICATION SERVICE INFORMATION The Telematics Control Unit (TCU) has the ability to send an automatic collision notification when the vehicle is involved in an accident. Once an automatic collision notification is performed, the function becomes disabled and the TCU must be reset to re-enable the automatic collision notification function. Some models will store DTC B2E1B-97 for “Automatic eCAll locked” as “CURRENT” when this function is d

  • Aug 15, 2024ELECTRICAL SYSTEMITB22-017B

    DTC B2E01-96 (INTERNAL BATTERY) STORED AS CURRENT IN IVC APPLIED SYSTEMS: Vehicles equipped with Telematics SERVICE INFORMATION CONSULT has been updated to allow DTC B2E01-96 for “Internal battery” to be cleared in the Telematics Control Unit (TCU). If DTC B2E01-96 is Current/Active in the TCU, and no additional Current/Active DTCs are present in the TCU, perform the SERVICE PROCEDURE starting on page 2. This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previ

  • Aug 15, 2024ELECTRICAL SYSTEMITB19-042E

    AV CONTROL UNIT REPLACEMENT PROCESS This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin. IF YOU CONFIRM The AV control unit needs to be replaced. ACTION 1. Read and save the VIN. 2. Read and save the configuration. 3. Replace the AV control unit. 4. Reprogram the AV control unit. 5. Configure the AV control unit. 6. Write the VIN to the AV control unit. IMPORTANT: Procedures 4-6 above must be performed in the order shown below

  • Aug 15, 2024ELECTRICAL SYSTEMITB19-029E

    TELEMATICS (IVC) SERVICE INFORMATION Vehicles equipped with factory telematics system HINT:  If the client experiences Wi-Fi hotspot related concerns only, DO NOT replace the TCU. Have the client contact the AT&T Support line at 1 (888) 719-7242.  See ITB12-011 for models built before those listed above. SERVICE INFORMATION The APPLIED VEHICLES are equipped with a wireless communication device called a Telematics Communication Unit (TCU). The TCU communicates with the Infiniti Data Center to p

  • and 90 more

Source: NHTSA manufacturer communications (technical service bulletins).

Warranty manufacturer terms, by make

Basic
4 yr / 60k mi
Powertrain
6 yr / 70k mi
Roadside assistance
4 yr
Maintenance
3 yr

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.