Infiniti Q70L Reliability

Infiniti Q70L years to avoid — and the best ones

The Infiniti Q70L year to avoid is 2018, at 1 complaints per production run. The best is 2015 at 1 — 1.0 times cleaner for a car wearing the same badge. Both figures are rates, not totals: a raw count only tells you which year sold well, so the best-selling year always looks like the worst car. Dividing by the number of production runs strips sales volume out and leaves the fault rate.

Among the 2 Infiniti Q70L years with enough history, the three to walk away from are 2015, 2018; the three worth hunting are 2018, 2015. Anything marked «too new» sits outside the ranking on purpose — complaints keep arriving for a decade after a car is sold, so a 2026 build would look flawless next to a ten-year-old one and comparing them would be dishonest.

When it starts to break

Not the calendar year the complaint was filed — the age of the car when it failed. That age decides who pays: inside the warranty the manufacturer does, outside it you do.

Basic warranty on this car is 4 years / 50,000 miles. Only 12.5% of reported failures happen inside it — the remaining 87.5% come out of the owner's pocket. Powertrain cover (6 years / 70,000 miles) reaches further, but it only covers engine and transmission, and most complaints here are not either.

What actually fails — and at what age

Ordered by how often owners reported each system, with the age at which it typically goes. On a Infiniti Q70L the early trouble is Vehicle Speed Control — reported at around 4 years, so a car still under warranty is the one to check for it. What waits further out is Power Train at 8 years — past every basic warranty, and the bill lands on whoever owns the car then.

How we measure it

Reliability scores usually arrive as a number out of five with no working shown. The Infiniti Q70L figure here comes out of 8 individual reports, and here is exactly how they were turned into a rate — two steps in it are arguable and you should be able to argue with them.

Rate, not total. Volume alone would decide the ranking, so we divide by the number of production runs — the distinct first-eleven-character VIN prefixes on record. The Infiniti Q70L alone splits into 8 runs carrying 8 complaints — 1 per run against 3.73 for the market.

Age, not year. Incident date minus model year gives the age at failure, which is what the warranty question turns on. It is why our «worst year» rankings exclude anything built in the last 6 years — those cars simply have not had time to break yet.

What this is not. Filing with a federal regulator takes effort, so what you see are faults someone judged serious — not scratched paint, not running costs, not how nice the car is to live with. For the Infiniti Q70L the file runs from 2015 to 2019, so the older years carry a full life of reports and the newest carry almost none.