Infiniti QX80 Y62 — Problems & Common Faults

The Y62 QX80 is Infiniti's full-size SUV built around the 5.6-liter VK56VD V8 — 400 hp, old-school, smooth-running, and an engine that will comfortably clear 125,000 miles without neglect. The catch isn't the short block itself, it's two chain-driven assemblies. On builds before March 2013, the timing chain can stretch prematurely, typically between 53,000 and 93,000 miles, with repair costs of $3,000–5,500 once the original service campaign no longer covers it. That's compounded by the high-pressure fuel pump riding directly on the timing chain: cam lobe wear through the lifter bucket lets fuel leak into the engine oil, washing off the lubrication film, and neglected long enough this leads to catastrophic engine damage costing up to $8,000.

The 2017–2019 build years carry their own rarer but pricier risk: scuffing on cylinder #7's wall, diagnosed by borescope through the spark plug hole per service bulletin NTB19-057, often showing up under 43,000 miles, with a short-block replacement running $10,000–15,000. Less dramatic but still annoying: the catalytic converters built into the exhaust manifold can crack (over $2,500 per side around 99,000 miles), and the cooling fan corrodes and seizes on winter-salt-exposed builds.

Two NHTSA recalls target fuel-system parts: 2020–2021 models over a swelling fuel pump impeller that can stall the engine (21V-373), and 2014–2015 models over undertightened fuel pressure sensors (14V-683) — both fixed by the dealer at no charge. Add the hydraulic HBMC suspension system (Hydraulic Body Motion Control, the active anti-roll setup that levels the body through corners), whose compressor corrodes internally from moist, salty winter air and fails with a suspension-malfunction warning plus noticeably more body lean — repair runs $800–3,000. On top of that, a battery that a smart charging system with sensor drift can drain within a week, sometimes taking up to nine documented dealer visits to resolve. NHTSA has around 109 complaints logged for the Y62, led by electrical (22) and engine (19), followed by airbags (15, two tied to crashes) and brakes (13). Independent buying guides call out 2014 (launch-year battery and mechanical issues) and 2019 (a cluster of electrical complaints) as the weaker years, while 2015 and the 2020/2021 range come up as comparatively clean.

Test-drive checklist: Listen on cold start for rattling or squealing from the front of the engine, check the dipstick for a fuel smell, look for an HBMC suspension warning on the display, ask about battery behavior after the vehicle sits for a week.

2026 market: Early 2015 builds run $12,000–16,000; clean 2017/2018 examples with moderate mileage land around $15,000–29,000; newer model years sit well above that.

Insider pick: A 2015 build, or any post-March-2013 vehicle with the revised timing chain, backed by unbroken oil-change and HPFP-inspection records — the V8 rewards disciplined maintenance and punishes neglect with the priciest repairs in the lineup. A quick borescope check of cylinder #7 before purchase costs little and can save a five-figure surprise down the road.