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Infiniti · Known Issues

2014 Infiniti Q50 Problems: 5 Known Issues

2014 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2014 Infiniti Q50 has 5 documented known issues, with 3 rated critical. The most serious are M274 2.0T Timing Chain and Camshaft Adjuster Wear ($1,500-$3,500 repair), Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000) ($0-$0 repair) and Driveshaft Fatigue Fracture Causing Loss of Drive Power (Recall 24V470000) ($0-$0 repair). Across all issues with published estimates, repair costs range from $200 to $4,000. DIY maintenance guides at au7o.io.

In This Article

  • Q50 Engine2
  • Q50 Safety/Recalls1
  • Q50 Drivetrain1
  • Q50 Electrical1
  • FAQ
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In This Article

  • Engine2
  • Safety/Recalls1
  • Drivetrain1
  • Electrical1
  • FAQ

All 5 Known Issues

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On the 2014-2018 Infiniti Q50, the Q50's 2.0t uses the Mercedes-Benz M274 turbocharged four, shared with the C300 and GLC300. The timing chain and the camshaft adjusters (variable valve timing phasers) wear faster than the engine's design life, with problems commonly surfacing somewhere around 80,000 miles and reported as early as 60,000 on neglected cars. The first symptom is a brief metallic rattle on cold start as oil pressure builds and the tensioner takes up slack. Left alone, chain stretch throws off cam timing, sets correlation codes, and in the worst cases the chain skips teeth or breaks, which on this interference engine destroys valves and pistons. Extended oil change intervals and low oil level accelerate the wear.

This issue also affects: Infiniti FX45, Infiniti G37, Infiniti Q70

Common Symptoms

  • Metallic rattle for one to three seconds on cold start
  • Rattle or whine from the front of the engine that changes with RPM
  • Check engine light with camshaft/crankshaft correlation codes
  • Rough idle or reduced power
  • Engine misfire or failure to start after a loud bang

How to Fix

Treat a cold-start rattle on the 2.0t as a timing issue until proven otherwise rather than dismissing it as normal direct-injection noise. Have the shop scan for camshaft/crankshaft correlation codes and check actual cam timing against spec. Caught early, replacing the chain, tensioner, guides, and both camshaft adjusters is far cheaper than the engine. Change oil every 5,000 miles with the correct low-ash full synthetic instead of following the extended factory interval, and check the level between changes — this engine also consumes oil, and running it low is what kills the chain. On a used purchase, cold-start the car yourself before buying; a seller who has the engine already warm may be hiding exactly this noise.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Infiniti M274 primary timing chain
    OEM13028-HG00F

    Measured chain-wear/stretch branch Fitment/availability: 13028-HG00F supersedes 13028-HG00C and 13028-90C0N and fits listed Q50 2LTURBO applications. Confirm 2016-2018 U.S.

    InfinitiPartsDeal
  • Genuine Infiniti M274 chain tensioner/adjuster assembly
    OEM13070-HG00F

    Confirmed primary chain-tensioner/adjuster failure branch Fitment/availability: 13070-HG00F fits listed Q50 2LTURBO applications and is cataloged as the chain tensioner/tensioner adjuster. Confirm VIN and test result; do not confuse it w…

    InfinitiPartsDeal
  • Genuine Infiniti M274 slack-side timing-chain guide
    OEM13091-HG00B

    Worn or damaged slack-side guide branch during confirmed timing service Fitment/availability: 13091-HG00B fits listed Q50 2LTURBO applications and is the slack-side/at-cylinder-head guide. Confirm VIN and diagram position; it is not the …

    InfinitiPartsDeal
  • Genuine Infiniti M274 tension-side timing-chain guide
    OEM13085-HG00B

    Worn or damaged lower tension-side guide branch during confirmed timing service Fitment/availability: 13085-HG00B fits listed Q50 2LTURBO applications and is the lower tension-side guide. Confirm VIN and diagram position; the catalog als…

    InfinitiPartsDeal

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$1,500 - $3,500

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2014-2018 Infiniti Q50, the M274 four-cylinder in the 2.0t burns noticeably more oil than owners expect, and consumption climbs with mileage. Reports commonly describe roughly a quart per 3,000 miles once the car passes 60,000 miles, with worse cases burning a quart every 1,500 miles. The usual contributors are piston ring wear and coking, valve stem seal hardening, and the crankcase ventilation system pulling oil vapor into the intake. Because the Q50 has no oil dipstick on this engine — the level is read through the instrument cluster — owners often do not notice the loss until the low-oil warning appears, and running the engine chronically low is what turns oil consumption into timing chain and bearing damage.

This issue also affects: Infiniti Q60, Mercedes-Benz GLA, Mercedes-Benz B-Class

Common Symptoms

  • Low oil level warning between scheduled oil changes
  • Consumption of a quart or more every 1,500 to 3,000 miles
  • Blue smoke on startup or under hard acceleration
  • Oil smell from the engine bay
  • Fouled spark plugs or misfires at higher mileage

How to Fix

Check the oil level through the vehicle information display at every other fuel fill rather than waiting for a warning, and keep a quart of the correct spec oil in the trunk. Establish the real consumption rate over a measured interval before authorizing repairs. If consumption exceeds roughly a quart per 1,000 miles, have the shop check crankcase pressure and inspect the PCV/crankcase pressure regulator in the cam cover — a failed diaphragm there is the cheapest cause and often sets a crankcase pressure code. Persistent blue smoke on startup after sitting points to valve stem seals; smoke under sustained load points to rings. Shortening the oil change interval to 5,000 miles with full synthetic slows ring coking. Expect the shop to also clean carbon from the intake valves on a direct-injected engine at this mileage.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Infiniti M274 oil-separator/breather assembly
    OEM130G5-90C2N / 11830-HG00C

    Confirmed crankcase-ventilation/oil-separator failure branch Fitment/availability: 11830-HG00C is cataloged for Q50 2LTURBO and superseded by current 130G5-90C2N, which the official store describes as the oil-separator assembly including…

    InfinitiPartsDeal

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$200 - $4,000

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2014-2017 Infiniti Q50, the front passenger seat's Occupant Classification System weighs and classifies the occupant to decide whether the passenger frontal airbag should be armed. On affected Q50 sedans the OCS can misclassify a normally seated adult as a child, or read the seat as empty while someone is sitting in it, and switch the passenger airbag off. The passenger airbag status light on the console reads OFF with an adult belted in. In a crash the passenger frontal airbag will not deploy. NHTSA campaign 16V244000 covers 2014-2017 Q50 and 2014-2016 Q50 Hybrid among a large group of Nissan and Infiniti vehicles.

Common Symptoms

  • Passenger airbag status light reads OFF with an adult in the seat
  • Airbag status flickers between ON and OFF over bumps
  • Airbag warning light illuminated on the instrument cluster
  • Seat reads as occupied when empty

How to Fix

Watch the passenger airbag status indicator every time an adult rides in the front passenger seat. If it reads OFF with an adult seated normally, get the car to an Infiniti dealer — on Q50 the remedy under 16V244000 is replacement of the OCS ECU (not just a reflash as on some other models in the campaign), free of charge. Do not attempt to work around it by adding weight to the seat or unplugging the sensor mat: that defeats the crash logic in both directions. Aftermarket seat covers and hard objects stored under the passenger seat can also confuse the sensor mat, so remove those before concluding the ECU has failed.

Typical repair cost:$0 - $0

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2014-2018 Infiniti Q50, on rear-wheel-drive Q50 sedans the two-piece propeller shaft can develop fatigue cracks and fracture in service. When the shaft breaks the car loses all drive power without warning, and because the parking pawl in the transmission is no longer connected to the rear wheels the vehicle can roll away when shifted to Park unless the parking brake is set. NHTSA campaign 24V470000 covers 2014-2018 Q50 two-wheel-drive vehicles along with several related M and Q70 models; Infiniti's internal campaign numbers are R24A5 and R24A7. Owner notification letters were mailed August 13, 2024. AWD cars are not covered by this campaign.

Common Symptoms

  • Sudden total loss of drive power while the engine still runs
  • Loud bang or grinding from under the center of the car
  • Driveline vibration or clunk that changes with throttle load
  • Vehicle rolls when placed in Park without the parking brake applied

How to Fix

Check the VIN against Infiniti's recall lookup or NHTSA. If the car is covered, the dealer replaces the driveshaft free of charge under campaign R24A5/R24A7 with no mileage or age limit. Until the recall work is done, always set the parking brake before leaving the car in Park. A driveline vibration or clunk that changes with load, or a rhythmic thump that rises with road speed, warrants immediate inspection of the shaft and its center support bearing rather than waiting for the recall appointment.

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

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Community Reported
High Confidence
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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 2014 Infiniti Q50 has 5 documented issues. The most frequently reported are: M274 2.0T Timing Chain and Camshaft Adjuster Wear, Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000), Driveshaft Fatigue Fracture Causing Loss of Drive Power (Recall 24V470000). Of these, 3 are rated critical and should be addressed promptly.

Is the Infiniti Q50 reliable?

The 2014 Infiniti Q50 has 5 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 3 issues are rated critical: M274 2.0T Timing Chain and Camshaft Adjuster Wear and Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000) and Driveshaft Fatigue Fracture Causing Loss of Drive Power (Recall 24V470000). 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 $4,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, M274 2.0T Timing Chain and Camshaft Adjuster Wear, typically costs $1,500-$3,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2014-2018 Infiniti Q50 M274 2.0T Timing Chain and Camshaft Adjuster Wear?

The Q50's 2.0t uses the Mercedes-Benz M274 turbocharged four, shared with the C300 and GLC300. The timing chain and the camshaft adjusters (variable valve timing phasers) wear faster than the engine's design life, with problems commonly surfacing somewhere around 80,000 miles and… Repairs typically run $1,500-$3,500. Severity: high.

What is the 2014-2017 Infiniti Q50 Occupant Classification System Suppresses Passenger Airbag (Recall 16V244000)?

The front passenger seat's Occupant Classification System weighs and classifies the occupant to decide whether the passenger frontal airbag should be armed. On affected Q50 sedans the OCS can misclassify a normally seated adult as a child, or read the seat as empty while someone… 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 2014-2018 Infiniti Q50 Driveshaft Fatigue Fracture Causing Loss of Drive Power (Recall 24V470000)?

On rear-wheel-drive Q50 sedans the two-piece propeller shaft can develop fatigue cracks and fracture in service. When the shaft breaks the car loses all drive power without warning, and because the parking pawl in the transmission is no longer connected to the rear wheels the veh… Repairs typically run $0-$0. Severity: high.

What is the 2014-2018 Infiniti Q50 M274 2.0T Excessive Oil Consumption?

The M274 four-cylinder in the 2.0t burns noticeably more oil than owners expect, and consumption climbs with mileage. Reports commonly describe roughly a quart per 3,000 miles once the car passes 60,000 miles, with worse cases burning a quart every 1,500 miles. The usual contribu… Repairs typically run $200-$4,000. 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.