Au7o mascotAu7o
Known IssuesTest Hub demo
  1. Au7o
  2. /
  3. Known Issues
  4. /
  5. Infiniti
  6. /
  7. Q50
Infiniti · Known Issues

2021 Infiniti Q50 Problems: 4 Known Issues

2021 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

Share:@au7o.io

2021 · All trims · All engines

Choose the year and equipment for your written issues and visual request.

No email neededHow interest is saved

Interest applies to the selected vehicle and configuration; it is not a reservation. Voting stores a first-party identifier for up to 180 days to prevent repeat votes. No account or email is needed. Clearing cookies or using another device may count separately. Privacy

Visual coming soon

Your interest helps us choose what to build next.

Visual Known Issues · Coming soon

$4.99/month plus taxes at launch · No payment today

Preview the XT6 example
Known IssuesMotorcycle IssuesDTC LookupDrivePricingAboutTermsPrivacyCookiesConsentData rightsCopyrightFeedback
Share:@au7o.io

Vehicle data and repair guidance on this site are compiled with AI assistance and may contain errors. Always verify with your service manual or a qualified mechanic.

Data protection representation

DataRep representative in the United KingdomDataRep representative in the European Union
Au7o · 2026
Built for DIY mechanics. Privacy-first.
Explore free Hub demo
Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Infiniti Q50 has 4 documented known issues, with 2 rated critical. The most serious are ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000) ($0-$0 repair) and Improperly Heat-Treated Steering Knuckle and Rear Axle Housing (Recall 21V402000) ($0-$0 repair). DIY maintenance guides at au7o.io.

In This Article

  • Q50 Engine1
  • Q50 Suspension1
  • Q50 Safety/Recalls1
  • Q50 Electrical1
  • FAQ
Get Started
Back to top

In This Article

  • Engine1
  • Suspension1
  • Safety/Recalls1
  • Electrical1
  • FAQ

All 4 Known Issues

Filter:
ALL YEARS2026202520242023202220212020201920182017201620152014

On the 2021 Infiniti Q50 VR30DDTT, on certain 2021 Q50 and Q60 models the Engine Control Module misreads a rapid acceleration event and responds by incorrectly reducing engine power and cutting fuel supply. The driver experiences an abrupt loss of power, and the fuel cut can be severe enough to stall the engine outright — a dangerous failure mode during exactly the maneuvers where full power was requested, such as merging or overtaking. NHTSA campaign 21V234000 covers the defect; Infiniti's internal number is R20C5 and the recall began May 25, 2021.

This issue also affects: Infiniti Q60, Nissan Z

Common Symptoms

  • Sudden loss of engine power during hard acceleration
  • Engine stalls while accelerating or merging
  • Momentary hesitation or cut-out under full throttle
  • Check engine light after a power loss event

How to Fix

Have an Infiniti dealer reprogram the ECM under recall R20C5 / NHTSA 21V234000, free of charge. This is the whole remedy — no hardware is replaced. Confirm on a used 2021 Q50 that the campaign was completed rather than assuming it, since the symptom is intermittent and a prior owner may never have reported it. If power loss or stalling persists after the reflash, stop attributing it to the recall and have the fuel delivery system and the drive belt checked instead.

Find a Infiniti dealer

Choose to share your location for this search, or enter an area below. Your search location is sent to Google to find dealers.

Open Infiniti dealer map in Google Maps ↗

Call to confirm they service Infiniti vehicles and check your VIN, recall eligibility, parts availability, and appointment options.

Typical repair cost:$0 - $0

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2021 Infiniti Q50, a batch of front steering knuckles and rear axle housings left the supplier without proper heat treatment, leaving them below the required strength. The weakened parts can deform on impact — a curb strike or pothole that a sound component would shrug off — resulting in loss of steering control or, in the worst case, wheel separation. NHTSA campaign 21V402000 covers certain 2021 Q50 along with 2020 Murano and QX60, 2021 GT-R and QX50. Owner notification letters were mailed July 26, 2021.

Common Symptoms

  • Steering pull or off-center wheel that alignment does not correct
  • Uneven or rapid tire wear at one corner
  • Clunk or knock from a corner over bumps
  • Visible wheel camber change after an impact

How to Fix

Have the dealer inspect the front steering knuckles and rear axle housing under recall 21V402000 and replace whatever fails inspection, free of charge. Do not skip this one on the theory that the car has never been hit: the parts are under-strength from new, and the failure only reveals itself at the moment of impact. If the car has already struck a curb or pothole hard, describe that to the service advisor — it changes the inspection from precautionary to urgent. Symptoms of an already-deformed knuckle include a steering pull that alignment will not correct and uneven tire wear on one corner.

Find a Infiniti dealer

Choose to share your location for this search, or enter an area below. Your search location is sent to Google to find dealers.

Open Infiniti dealer map in Google Maps ↗

Call to confirm they service Infiniti vehicles and check your VIN, recall eligibility, parts availability, and appointment options.

Typical repair cost:$0 - $0

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2021 Infiniti Q50, a software error in the audio/video control unit can deactivate the display screen, so no rear-view image appears when the car is shifted into reverse. The vehicle fails to comply with FMVSS 111, the federal rear visibility standard. Because the same control unit drives the center display, owners typically see the whole InTouch screen go dark or unresponsive rather than the camera alone failing. NHTSA campaign 21V599000 covers 2021 Q50, Q60, and QX80; Nissan's internal number is R21A9 and letters were mailed September 14, 2021.

Common Symptoms

  • Black screen when shifting into reverse
  • Center display goes dark or unresponsive at random
  • Rear camera image appears delayed, frozen, or distorted
  • Display returns after an ignition cycle then fails again

How to Fix

Have the dealer update the audio/video control unit software under recall R21A9 / NHTSA 21V599000, free of charge. Before assuming a hardware fault, try a system reset by holding the audio power knob for several seconds — but a reset that has to be repeated means the recall software is the real fix. If the screen still blanks after the update, have the 12V battery and charging system load-tested: marginal system voltage causes the same control unit to drop out and produces a long tail of unrelated-looking InTouch and driver-assist faults.

Find a Infiniti dealer

Choose to share your location for this search, or enter an area below. Your search location is sent to Google to find dealers.

Open Infiniti dealer map in Google Maps ↗

Call to confirm they service Infiniti vehicles and check your VIN, recall eligibility, parts availability, and appointment options.

Typical repair cost:$0 - $0

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2014-2026 Infiniti Q50, the dual-screen InTouch infotainment system suffers from significant lag, freezing, and occasional black screens. The system uses an outdated processor that struggles with modern navigation and connectivity demands.

This issue also affects: Infiniti Q60, Nissan Altima

Common Symptoms

  • Touchscreen unresponsive to inputs
  • Navigation freezing mid-route
  • Bluetooth disconnecting frequently
  • Black screen on upper or lower display

How to Fix

Perform a system reset by holding the power button for 10 seconds. Update to the latest firmware via USB. In persistent cases, the infotainment module may need replacement. Some owners have had success with aftermarket head units.

Typical repair cost:$0 - $1,500

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence
🔧
A mechanic who knows YOUR exact car
Answers tuned to your year, make, model & trim — not generic advice. Save your garage so it always has the right context.
Get ahead of Infiniti Q50 problems — free
Leave your email and we'll alert you the moment there's a new recall or known issue for your Infiniti Q50. Free, no account needed.

Don't see your problem? Describe your symptoms to get a diagnosis, or get a full repair guide.

Other Infiniti Models

Infiniti G3723Infiniti FX3520Infiniti G3511Infiniti QX508Infiniti QX558Infiniti QX608

Frequently Asked Questions

What are the most common Infiniti Q50 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Infiniti Q50 has 4 documented issues. The most frequently reported are: ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000), Improperly Heat-Treated Steering Knuckle and Rear Axle Housing (Recall 21V402000), Rear-View Camera Image Fails to Display (Recall 21V599000). Of these, 2 are rated critical and should be addressed promptly.

Is the Infiniti Q50 reliable?

The 2021 Infiniti Q50 has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000) and Improperly Heat-Treated Steering Knuckle and Rear Axle Housing (Recall 21V402000). 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 Q50 problems?

Repair costs for known Infiniti Q50 issues range from $0 to $1,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000), typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2021 Infiniti Q50 ECM Software Cuts Fuel After Rapid Acceleration Causing Stall (Recall 21V234000)?

On certain 2021 Q50 and Q60 models the Engine Control Module misreads a rapid acceleration event and responds by incorrectly reducing engine power and cutting fuel supply. The driver experiences an abrupt loss of power, and the fuel cut can be severe enough to stall the engine ou… Repairs typically run $0-$0. Severity: high.

What is the 2021 Infiniti Q50 Improperly Heat-Treated Steering Knuckle and Rear Axle Housing (Recall 21V402000)?

A batch of front steering knuckles and rear axle housings left the supplier without proper heat treatment, leaving them below the required strength. The weakened parts can deform on impact — a curb strike or pothole that a sound component would shrug off — resulting in loss of st… Repairs typically run $0-$0. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

What is the 2021 Infiniti Q50 Rear-View Camera Image Fails to Display (Recall 21V599000)?

A software error in the audio/video control unit can deactivate the display screen, so no rear-view image appears when the car is shifted into reverse. The vehicle fails to comply with FMVSS 111, the federal rear visibility standard. Because the same control unit drives the cente… Repairs typically run $0-$0. Severity: medium.

What is the 2014-2026 Infiniti Q50 InTouch Infotainment System Lag and Freezing?

The dual-screen InTouch infotainment system suffers from significant lag, freezing, and occasional black screens. The system uses an outdated processor that struggles with modern navigation and connectivity demands. Repairs typically run $0-$1,500. Severity: medium.