Infiniti QX4 Reliability — Best and Worst Years by the Data

Quick answer

Half of all complaints arrive by 10 years of age, so 81.5% land after the 4-year basic warranty ends. The system owners report most is Suspension, with 77 complaints, typically at 11.3 years.

Infiniti QX4 years to avoid — and the best ones

FIG.01·Infiniti QX4 — complaint rate by model year
Model year	Per run	Complaints	Runs	Enough history?
2003	1.89	17	9	yes
2002	2.07	31	15	yes
2001	1.79	52	29	yes
2000	2	24	12	yes
1999	2.24	38	17	yes
1998	2.36	26	11	yes
1997	3.18	35	11	yes

ROWS 7·SOURCE NHTSA complaints, grouped by VIN production run

Among the 4 Infiniti QX4 years with enough history, the three to walk away from are 1999, 2002, 2000; the three worth hunting are 2001, 2000, 2002.

When it starts to break

FIG.02·Infiniti QX4 — age at failure
Age at failure	Complaints	Running total	Warranty
0 years	12	6.7%	covered
1 year	8	11.2%	covered
2 years	5	14%	covered
3 years	8	18.5%	covered
4 years	4	20.8%	you pay
5 years	7	24.7%	you pay
6 years	7	28.7%	you pay
7 years	10	34.3%	you pay
8 years	8	38.8%	you pay
9 years	15	47.2%	you pay
10 years	12	53.9%	you pay
11 years	15	62.4%	you pay
12 years	21	74.2%	you pay
13 years	18	84.3%	you pay
14 years	11	90.4%	you pay
15 years	17	100%	you pay

ROWS 16·SOURCE NHTSA complaints with incident dates

Basic warranty on this car is 4 years / 50,000 miles. Only 18.5% of reported failures happen inside it — the remaining 81.5% come out of the owner's pocket. Powertrain cover (6 years / 70,000 miles) reaches further, but it only covers the engine and transmission, which account for about 6% of the complaints here.

What actually fails — and at what age

What waits further out is Suspension at 11.3 years — past every basic warranty, and the bill lands on whoever owns the car then.

FIG.03·Infiniti QX4 — what fails and when
System	Complaints	Typical age	Crash	Fire
Suspension	77	11.3 yrs	5	—
Steering	48	11.4 yrs	7	—
Structure	44	11.5 yrs	—	—
Fuel System	16	9.3 yrs	2	—
Gasoline	16	9.3 yrs	2	—
Vehicle Speed Control	13	4.2 yrs	6	—
Engine And Engine Cooling	13	5.3 yrs	2	1
Air Bags	13	7.8 yrs	8	—

ROWS 8·SOURCE NHTSA complaints

What else in this class

6 models share the QX4's vehicle class. Per production run, the Subaru Outback draws 3.64, the Toyota Land Cruiser 1.49 and the Subaru Forester 3.35, against 2.14 for the QX4.

FIG.05·Infiniti QX4 — rivals in the same class
Same class as the QX4	Complaints on record	Recall campaigns	Years built
Subaru Outback	8,587	159	2005–2026
Toyota Land Cruiser	257	85	1981–2026
Subaru Forester	6,521	121	1998–2026
Chevrolet Trailblazer	8,447	57	2002–2026
Honda Element	1,308	100	2003–2011
Jeep Liberty	8,880	80	1993–2013

ROWS 6·SOURCE NHTSA complaints and recall campaigns

The table shows totals on record; the rates per production run are in the sentence above.

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Everything on the Infiniti QX4

Recalls23 campaigns Fuel economy16 mpg best Common problems285 complaints Check a VINAgainst this exact build DimensionsSize, weight, generations Used prices53 listings Window stickerOriginal Monroney label Decode a VINWhat each character means About this car1997–2003

Frequently asked questions

Is the Infiniti QX4 reliable?

By complaints per production run it is better than typical: 2.14 against 3.73 for the average car, and in the middle of its class rivals.

Which QX4 years should you avoid?

By complaints per production run, 1999, 2002, 2000. The cleanest years old enough to judge are 2001, 2000, 2002. Years newer than 6 are left out: complaints keep arriving for years after a car is sold.

When do QX4 problems usually start?

Half of all complaints arrive by 10 years of age. The most reported system is Suspension, typically at 11.3 years, followed by Steering.

Will the warranty cover QX4 problems?

Mostly not: basic cover is 4 years / 50,000 miles, and only 18.5% of reported failures fall inside it. Powertrain cover lasts longer, but engine and transmission make up about 6% of the complaints here.

Is the QX4 more reliable than the Subaru Outback?

Yes: 2.14 complaints per production run for the QX4 against 3.64 for the Subaru Outback.

Complaint records from NHTSA, grouped by VIN production run (characters 1–11). Rates, age-at-failure and warranty coverage computed by ForCar. Model years newer than 6 years are excluded from rankings — complaints accumulate for a decade (how we measure). Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.

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