2014-2024 Infiniti QX50 Problems: 10 Known Issues

How to Fix

Have an Infiniti retailer check the VIN for open recall 24V154. For affected vehicles, the retailer replaces the driver's airbag assembly at no charge. Do not use vehicle age, mileage or the absence of an airbag light to decide whether the recall applies. Ask the retailer for the vehicle's campaign history if completion is uncertain.

How to Fix

Have an INFINITI retailer verify the VIN and campaign status and install the free display-control software update where required. Until repaired, after changing display settings, check that a usable rear image appears in reverse and readjust dim settings as needed. This interim adjustment does not complete the recall. If the image remains unavailable, arrange diagnosis and do not rely on the camera.

How to Fix

Confirm battery voltage and key fob operation first, then scan BCM/IPDM/steering lock modules for communication or lock-status faults. Repair usually involves replacing or bypassing the failed electronic steering lock assembly depending on model applicability and local repair practice, followed by key/immobilizer relearn if required. Because symptoms mimic a weak battery or bad brake switch, proper diagnosis is important before replacing parts.

Owner tips & cautions

• TipBefore condemning the steering lock, verify the 12V battery is fully charged and load-tested; low voltage can trigger misleading intelligent-key and lock errors.
• TipIf the vehicle intermittently fails to start, scan BCM and immobilizer modules immediately while the fault is active; stored history can disappear after battery disconnects.

How to Fix

As a temporary fix, press and hold the Volume/Audio ON/OFF button for 5-10 seconds. Permanent fix: have an Infiniti dealer update the display control unit (DCU) software per bulletin ITB18-041d.

How to Fix

The repair is free at any INFINITI dealer. The dealer inspects the front steering knuckle and rear axle housing and replaces either part as necessary at no cost. Owner notification letters for this campaign were mailed July 26, 2021, so a QX50 bought used may never have had the letter reach its current owner — enter your VIN at nhtsa.gov/recalls to confirm whether the recall is still open on your vehicle. INFINITI customer service can be reached at 1-800-662-6200.

How to Fix

Inspect for oil seepage around the front timing cover, upper oil pan junction, and valve cover areas to confirm the leak source before authorizing repairs. If startup rattle is persistent or worsens, check chain tensioner operation and timing correlation, then reseal the front cover with OEM-equivalent RTV and replace worn guides/tensioners as needed. Because labor overlap is substantial, many owners replace the water pump, drive belt, and related seals during the same job.

Owner tips & cautions

• TipHave the leak source dye-tested first; valve cover seepage can mimic a front cover leak, and misdiagnosis can turn a moderate repair into a very expensive one.
• TipIf the front cover is being removed, ask the shop to inspect timing chain guides, tensioners, and water pump at the same time to avoid duplicate labor later.

How to Fix

Have an Infiniti retailer check ITB22-025B against the vehicle's VIN and production date. It covers 2019–2021 QX50 and 2022 QX50 built on or before February 15, 2022 when the cooling fan stays at high speed without cycling and the A/C is not cooling. The technician first checks the fan's Denso number: if it is already AA222750-0753, -0763 or -0773, this bulletin does not apply and normal diagnosis is required. For the bulletin's affected-part branch, follow the specified cooling-fan and IPDM E/R replacement and configuration procedure. Ask the retailer whether the repair is covered by the vehicle's warranty; the bulletin itself does not extend warranty coverage.

How to Fix

First, note when the shudder happens: from a stop or while cruising, under light or heavy throttle, and with the engine cold or warm. Then have an Infiniti dealer road-test the car, scan the transmission control module for stored codes, check the CVT fluid level and condition, and look up any open bulletins or campaigns for your VIN. New Infinitis carry 6-year/70,000-mile powertrain coverage, so have the complaint written on a repair order while the car is still covered. The repair depends on what the dealer finds. It can range from a CVT fluid drain and refill with genuine Nissan NS-3 CVT fluid, or a TCM recalibration, to valve body or full transmission replacement in severe cases.

How to Fix

Have an Infiniti retailer confirm the build date and diagnose the odor, including checking for actual leaks. Where ITB21-020A applies, a qualified technician replaces the specified rocker-cover assembly and PCV separator and eliminates PCV hose 2 as directed by the complete service procedure. Do not remove a hose from the existing system as a stand-alone repair. Confirm warranty coverage and obtain a repair estimate for the particular vehicle.

How to Fix

Inspect all four sunroof drains, drain grommets, A-pillar routing, and the HVAC evaporator drain for blockage or disconnection. Clear drains with low-pressure air or line, repair cracked hoses, and dry the carpet and underlayment thoroughly; if water reached connectors, inspect for corrosion and repair affected wiring. Many owners also modify or extend drain outlets to reduce repeat clogging.

Owner tips & cautions

• TipDo not use high-pressure compressed air directly into the drain tubes; it can separate old hoses behind trim and make the leak worse.
• TipAfter fixing the leak, pull up the carpet and dry the padding completely with fans or a dehumidifier, otherwise odor and corrosion often return.