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Infiniti · Known Issues

2015 Infiniti QX70 Problems: 4 Known Issues

2015 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 2015 Infiniti QX70 has 4 documented known issues. None of the listed issues is rated critical; this is not a complete reliability assessment. Across all issues with published estimates, repair costs range from $300 to $3,500. DIY maintenance guides at au7o.io.

In This Article

  • QX70 Transmission1
  • QX70 Drivetrain1
  • QX70 Body/Panels1
  • QX70 Engine1
  • Recalls1
  • FAQ
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In This Article

  • Transmission1
  • Drivetrain1
  • Body/Panels1
  • Engine1
  • Recalls1
  • FAQ

All 4 Known Issues

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ALL YEARS2017201620152014

On the 2014-2017 Infiniti QX70, the QX70's RE7R01A seven-speed automatic draws consistent owner complaints for delayed engagement when selecting drive or reverse, rough or clunky shifts between the lower gears, and a shudder felt during light acceleration at low speed. The transmission is generally durable, and most of these complaints trace to fluid condition and to the torque converter lock-up clutch rather than to hard parts: the factory positions the fluid as lifetime fill, which it is not, and degraded fluid makes the converter clutch chatter as it modulates. Left in service long enough, shudder that started as a fluid problem does become a converter problem.

This issue also affects: Infiniti G37, Infiniti Q70, Nissan Altima

Common Symptoms

  • Delayed engagement when shifting into drive or reverse
  • Rough or clunky shifts in the lower gears
  • Shudder or vibration under light acceleration at low speed
  • Flare or hesitation between gears
  • Harsh downshift when coming to a stop

How to Fix

Start with the fluid, not with a rebuild quote. Have the transmission serviced with genuine Nissan Matic S — this transmission is specific about fluid and generic multi-vehicle ATF is a common cause of exactly these symptoms after an independent service. A drain-and-fill repeated two or three times at intervals is gentler than a high-pressure flush on a unit with high mileage. Have the shop check for stored transmission codes and confirm the torque converter clutch slip rate on a scan tool while driving, which distinguishes converter shudder from a hard-part fault. If delayed engagement persists on fresh correct fluid, the next suspects are the valve body solenoids and the accumulator, both far cheaper than a replacement unit. Ignore advice to add friction modifiers or shudder-fix additives — they mask the symptom while the fluid continues to degrade.

Typical repair cost:$300 - $3,500

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

On the 2014-2017 Infiniti QX70, aWD-equipped FX/QX70 models develop transfer case output shaft seal leaks, allowing gear oil to seep onto the exhaust and create a burning smell. The seals harden and crack from heat exposure over time.

Common Symptoms

  • Burning gear oil smell
  • Oil drip from center of vehicle
  • Low transfer case fluid level

How to Fix

Replace the transfer case output seals and inspect the transfer case fluid level. Refill with genuine Nissan transfer case fluid. Check the driveshaft joints for wear while the transfer case is accessible.

What you need to fix it

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

  • Genuine Infiniti transfer-case rear output-shaft seal
    OEM33142-01J10

    Confirmed rear transfer-case output-seal leak branch Fitment/availability: 33142-01J10 is cataloged as the QX70 transfer-case output/rear seal for 2014-2017 Base, Premium and Sport with VQ37VHR or VK50VE. AWD and the leaking rear interfa…

    InfinitiPartsDeal
  • Genuine Infiniti second transfer-case oil seal
    OEM33216-CG01A

    Confirmed leak at the catalog position identified as 33114M branch Fitment/availability: 33216-CG01A is cataloged for 2014-2017 QX70 Base, Premium and Sport with VQ37VHR or VK50VE.

    InfinitiPartsDeal
  • Genuine Nissan Matic J transfer-case fluid, one quart
    OEM999MP-MTJ00P

    Measured transfer-case refill after a confirmed seal repair Fitment/availability: 999MP-MTJ00P is the Matic J fluid specified for the 2014 QX70 transfer case. Sold as one quart; confirm the exact 2014-2017 manual specification, current s…

    Z1 Off-Road

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:$300 - $800

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence

On the 2014-2017 Infiniti QX70, the QX70 carries over the S51 chassis sunroof drain design, in which a tray around the glass panel collects water and routes it through tubes running down the A- and C-pillars. Debris packs the drain nipples at the tray corners, the tray overflows, and water enters the headliner and runs down the pillars into the cabin. The characteristic finding is a soaked passenger footwell, since the drain routing on this body tends to dump on that side first. Because the water passes wiring and body modules on the way down, the complaint often surfaces as unexplained electrical behavior before anyone notices damp carpet, and the water eventually reaches the modules under the front seats.

This issue also affects: Infiniti G37, Infiniti Q70, Nissan 370Z

Common Symptoms

  • Wet or damp passenger footwell carpet
  • Water dripping from the headliner or map light area
  • Persistent musty or mildew smell
  • Unexplained electrical faults or erratic module behavior
  • Water stains on pillar trim
  • Interior glass fogging that will not clear

How to Fix

Open the sunroof and find the drain openings at the four corners of the tray. Clear them with low-pressure compressed air or soft weed-trimmer line fed in gently — never a stiff wire or drain snake, which punctures the tube inside the pillar and turns a clogged drain into a permanent leak that is far worse to chase. Pour water into the tray and confirm it exits behind each wheel. Pull the carpet and padding up and dry them fully rather than letting them dry in place, since trapped moisture corrodes the connectors and modules underneath. Fix this before diagnosing any electrical complaint on a car with wet carpet. If leaking continues with drains flowing freely, the sunroof seal has failed or a drain tube has come off its nipple behind the pillar trim.

What you need to fix it

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

  • Genuine Infiniti QX70 front sunroof drain hose
    OEM91389-1CA2A

    Confirmed damaged or disconnected front-hose branch Fitment/availability: 91389-1CA2A is the cataloged front drain hose/supersession for the S51 roof family, with the retailer explicitly listing 2014-2015 QX70. For a 2016-2017 vehicle, o…

    InfinitiPartsDeal
  • Genuine Infiniti QX70 left rear sunroof drain hose
    OEM91389-1CA1A

    Confirmed damaged or disconnected left-rear hose branch Fitment/availability: 91389-1CA1A is cataloged for 2014-2017 QX70 VQ37VHR and VK50VE; the roof diagram identifies it as the left rear hose. Confirm side and VIN before purchase.

    InfinitiPartsDeal
  • Genuine Infiniti QX70 right rear sunroof drain hose
    OEM91389-1CA1B

    Confirmed damaged or disconnected right-rear hose branch Fitment/availability: 91389-1CA1B is cataloged for 2014-2017 QX70 VQ37VHR and VK50VE; the roof diagram identifies it as the right rear hose. Confirm side and VIN before purchase.

    InfinitiPartsDeal
  • Genuine Infiniti front sunroof drain-hose grommet/plug
    OEM74816-JU40B

    Confirmed leaking, damaged or obstructed front exit-grommet branch Fitment/availability: 74816-JU40B is a genuine drain-hose grommet/plug used in the S51 Infiniti roof family and replaces JU40A/JK01A. Confirm the exact 2014-2017 QX70 VIN…

    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:$0 - $900

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

On the 2014-2017 Infiniti QX70 3.7L VQ37VHR V6, the VQ37VHR engine in the QX70 can develop timing chain rattle, especially on cold starts. The primary timing chain stretches and the tensioner cannot fully compensate, resulting in a distinctive metallic rattle that typically quiets after 10-30 seconds.

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

Common Symptoms

  • Cold start chain rattle
  • Gradually worsening startup noise
  • Check engine light for cam timing

How to Fix

Replace the timing chain, tensioners, and guides as a set. Use updated Nissan timing chain components with improved tensioner design. Ensure regular oil changes with quality synthetic oil to minimize chain wear.

What you need to fix it

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

  • Genuine Infiniti VQ37 lower primary timing-chain tensioner
    OEM13070-1MR0A

    Confirmed lower primary hydraulic-tensioner failure branch Fitment/availability: 13070-1MR0A is the lower/primary tensioner shown in the 2014-2017 QX70 VQ37 catalog. Confirm VIN and failed position; it is not right 13070-JK21B or left 13…

    Official Infiniti Parts Store
  • Genuine Infiniti VQ37 primary timing chain
    OEM13028-JK20A

    Confirm VIN and measured primary-chain wear; the catalog separately lists two 13028-JK20B secondary chains.

    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

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence
NHTSA Recalls1 recall

FUEL SYSTEM, GASOLINE

Nissan North America, Inc. (Nissan) is recalling certain model year 2012-2014 Nissan Juke, 2012-2013 Infiniti M56, QX56, and 2014-2015 Infiniti Q70 (V8 engine vehicles only), and QX80 vehicles. The fuel pressure sensors may not have been sufficiently tightened during production. As a result, the fuel pressure sensor may loosen with vehicle usage and cause a fuel leak.

Campaign #14V68300028/11/2014

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

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Other Infiniti Models

Infiniti G3723Infiniti FX3520Infiniti Q5011Infiniti G3511Infiniti QX508Infiniti QX558

Frequently Asked Questions

What are the most common Infiniti QX70 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2015 Infiniti QX70 has 4 documented issues. The most frequently reported are: Seven-Speed Automatic Rough Shifting, Delayed Engagement, and Low-Speed Shudder, Transfer Case Output Seal Leak, Clogged Sunroof Drains Causing Cabin Water Leaks and Electrical Faults. None are rated critical, but regular maintenance is recommended.

Is the Infiniti QX70 reliable?

The 2015 Infiniti QX70 has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. None of the matching records is rated critical; this is not a complete reliability assessment. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Infiniti QX70 problems?

Repair costs for known Infiniti QX70 issues range from $0 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2014-2017 Infiniti QX70 Seven-Speed Automatic Rough Shifting, Delayed Engagement, and Low-Speed Shudder?

The QX70's RE7R01A seven-speed automatic draws consistent owner complaints for delayed engagement when selecting drive or reverse, rough or clunky shifts between the lower gears, and a shudder felt during light acceleration at low speed. The transmission is generally durable, and… Repairs typically run $300-$3,500. Severity: medium.

What is the 2014-2017 Infiniti QX70 Transfer Case Output Seal Leak?

AWD-equipped FX/QX70 models develop transfer case output shaft seal leaks, allowing gear oil to seep onto the exhaust and create a burning smell. The seals harden and crack from heat exposure over time. Repairs typically run $300-$800. Severity: medium.

What is the 2014-2017 Infiniti QX70 Clogged Sunroof Drains Causing Cabin Water Leaks and Electrical Faults?

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.

The QX70 carries over the S51 chassis sunroof drain design, in which a tray around the glass panel collects water and routes it through tubes running down the A- and C-pillars. Debris packs the drain nipples at the tray corners, the tray overflows, and water enters the headliner… Repairs typically run $0-$900. Severity: medium.

What is the 2014-2017 Infiniti QX70 VQ37VHR Timing Chain Noise?

The VQ37VHR engine in the QX70 can develop timing chain rattle, especially on cold starts. The primary timing chain stretches and the tensioner cannot fully compensate, resulting in a distinctive metallic rattle that typically quiets after 10-30 seconds. Repairs typically run $1,500-$3,500. Severity: medium.