AI Damage2021 Infiniti Q50: common problems
Owners of the 2021 Infiniti Q50 filed 6 complaints with NHTSA, most often about vehicle speed control and engine and cooling. The maker issued 111 service bulletins for this year. We found 1 repair videos on YouTube. Details by component below, with sources.
Key figures
- Owner complaints
- 6
- involving a crash
- 1
- Technical service bulletins (TSB)
- 111
- YouTube repair videos
- 1
What fails most often
- 1 Vehicle speed control 33% of all complaints
- 2 Engine and cooling 17% of all complaints
- 3 Forward collision avoidance 17% of all complaints
- 4 Powertrain 17% of all complaints
- 5 Structure 17% of all complaints
- 6 Air bags 17% of all complaints
- 7 Engine 17% of all complaints
- 8 Wheels 17% of all complaints
- Vehicle speed control: 2 complaints (33% of all), 1 of them with a crash reported by the owner.
- Engine and cooling: 1 complaints (17% of all); manufacturer bulletins for this component: 11.
- Forward collision avoidance: 1 complaints (17% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 5.
- Powertrain: 1 complaints (17% of all); manufacturer bulletins for this component: 4.
- Structure: 1 complaints (17% of all); manufacturer bulletins for this component: 4.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3 L · petrol · turbo · 6 cyl
- automatic, 7-speed
Drive: RWD, AWD
Symptoms owners describe
How many of the 6 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Vehicle speed control | 2 | 1 | 0 |
| Engine and cooling | 1 | 0 | 11 |
| Forward collision avoidance | 1 | 1 | 5 |
| Powertrain | 1 | 0 | 4 |
| Structure | 1 | 0 | 4 |
| Air bags | 1 | 0 | 2 |
| Engine | 1 | 0 | 2 |
| Wheels | 1 | 0 | 2 |
| Electrical system | 0 | 0 | 67 |
| Equipment | 0 | 0 | 20 |
| Visibility | 0 | 0 | 8 |
| Exterior lighting | 0 | 0 | 4 |
| Lane departure | 0 | 0 | 3 |
| Communication | 0 | 0 | 2 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
There was an incident on January 13, 2022 due to a manufacturer defect that caused my car to accelerate on it’s own. I was parked at a car wash to vacuum my vehicle.
The check engine light came on. The driver had to safely stop, turn the engine off, and restart it. After restarting, the vehicle temporarily regained acceleration and normal speed. This problem has occurred more than once and creates a serious safety risk in traffic, especially when merging or crossing intersections.
During the failure, the check engine warning light was temporarily illuminated. The contact intended to have the vehicle towed to the dealer, which was called and informed of the issue. The dealer informed the contact that the VIN was not included in NHTSA Campaign Number: 21V234000 (Engine and Engine Cooling).
When the vehicle was purchased, the tires were replaced. The vehicle was later taken to the dealer for maintenance, and while at the dealer, the contact was informed that there were nails in the tires and that the tires needed to be replaced. The contact checked the sticker on the door panel for the tire information.
The contact stated that while driving at undisclosed speeds, the air bag warning light illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The contact called an independent mechanic, but no assistance was provided. The manufacturer was not contacted.
I pulled over at the next exit in a public place and discovered my sunroof class had a piece of glass missing and it looked like it was pushed upwards. I knew this is not normal and never had I had this happen in any other car I owned with a sunroof.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 1,633 of 2,102 model years in the NHTSA data (among the 22% least complained about).
On average one model year of the Q50 has 21 complaints (9 years in the data). This year has 6, below average.
What to check before buying
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Forward collision avoidance. Radar and camera: calibration after bumper or windshield replacement.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- CERTIFICATION LABEL AND VIN PLATE REPLACEMENT SERVICE INFORMATION Because of collision damage or other…
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 =…
- 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…
- TURBOCHARGER REPLACEMENT PROCEDURE APPLIED ENGINES
VR30DDTT IF YOU CONFIRM One or both turbochargers require replacement. ACTION 1. Replace the affected turbocharger(s). Refer to the SERVICE PROCEDURE in this bulletin for the updated procedure. IMPORTANT: You MUST…
- DTC B00A0-00 STOREIF YOU CONFIRM DTC B00A0-00 (OCCUPANT DETECTION SENSOR UNIT) is stored, AND OCS zero…
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
- DTC B2E1B-06 (AUTOMATIC ECALL) STORED AS CURRENT IN THE IVC APPLIED VEHICLES
2020-2024 Q50 (V37) 2020-2022 Q60 (CV37) 2020-2024 QX80 (Z62) SERVICE INFORMATION The APPLIED VEHICLES that come equipped with a factory installed SOS switch, located near the overhead map lamp, also come equipped with…
- TELEMATICS CONTROL UNIT RESET AFTER AUTOMATIC COLLISION NOTIFICATION SERVICE INFORMATION The Telematics…
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…
- 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…
- 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…
- 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…
- INTELLIGENT KEY INITIALIZATION PROCEDURE STOPS OR WILL NOT CONTINUE This bulletin has been amended
See AMENDMENT HISTORY on the last page. Discard all previous versions of this bulletin.
- INTELLIGENT KEY NOT DETECTED / ENGINE WILL NOT START This bulletin has been amended
See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
- CAN COMMUNICATION – NETWORK DIAGNOSTIC FLOW CHART This bulletin has been amended
See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
NHTSA lists 111 bulletins for this year; the 12 newest are shown here.
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Infiniti Q50?
Owner complaints to NHTSA most often mention: vehicle speed control, engine and cooling, forward collision avoidance. Total complaints: 6. The most frequent symptoms in complaint texts: warning lights, check engine (50%), airbag warning light (17%), loss of power / limp mode (17%).
How many service bulletins (TSB) were issued for the 2021 Infiniti Q50?
NHTSA lists 111 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Infiniti Q50 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.