Skip to content
Infiniti Q45Model year report

2004 Infiniti Q45 Problems

Complaints
7filed with NHTSA
Median mileage
42,173miles, 5 complaints with mileage
Recalls
2campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—overall rating starts with 2011 models
EPA fuel economy
18 mpgcombined, 4.5L 8-cyl RWD · 16 city / 22 hwy

Sources: NHTSA records for the 2004 Infiniti Q45 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 7 consumer complaints for the 2004 Infiniti Q45. The part named most often is electrical system, with 3 complaints (43% of the total), followed by engine (2) and exterior lighting (2). 5 of the complaints include a mileage, and 60% of those were filed for vehicles with under 50,000 miles; the median is 42,173 miles. NHTSA lists 2 recall campaigns and 51 technical service bulletins for this model year. Electrical system complaints overlap with 10 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Electrical system: “My low beam headlamp system has now failed at two separate times, both during nighttime driving. The first was on november 2, 2009, at 37,600 miles, the left hid ballast failed; nissan repaired the failure under warranty although its time-portion had expired. The second failure was at 47,600 miles on december 1, 2011. Nissan/Infiniti consumer affairs were told and acknowledged that mileage warranty was no-where-near expired - but time had - yet, talked as though they would help with the repair. The quid-pro-quo was that I get an Infiniti dealer to verify problem and cost to repair. …”

NHTSA complaint #10443498, filed 2012-01, 37,600 miles

Engine: “The contact owns a 2004 Infiniti Q45. The contact stated that while driving at 40 MPH, the engine stalled while the service engine soon warning light and another unknown light illuminated. The vehicle was able to restart. The contact stated that the vehicle failed to accelerate after the failure occurred. The vehicle was taken to an independent mechanic where it was diagnosed that the cam position sensor failed and needed to be replaced. The vehicle was repaired, however the failure recurred. The vehicle was not repaired. The manufacturer was not notified of the failure. …”

NHTSA complaint #10984183, filed 2017-05, 111,000 miles

Steering: “The contact owns a 2004 Infiniti Q45. The contact stated that the vehicle's frame was corroded. The vehicle was included in NHTSA campaign number: 11v244000 (steering, suspension). The manufacturer stated that they would not pay for the repair. The dealer was not contacted. The contact kept the vehicle parked and had not driven it in over two years. The vehicle was not diagnosed or repaired. The failure mileage was unknown.”

NHTSA complaint #11173306, filed 2019-01

Mileage when problems were reported

60% of the 5 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 37,600 and 95,000 miles.

20%0–100%10–2540%25–500%50–7520%75–10020%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (5 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 42,173 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

20041200512010120121201412017120191
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2004 Infiniti Q45 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
Q45 RWD4.5L 8-cyl5-speed automatic162218$4,550

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2004 Infiniti Q45 → · Check a VIN at nhtsa.gov/recalls

NHTSA investigations

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 51 on record; the latest 10 are shown.

See all 51 bulletins →

Other model years of the Infiniti Q45

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2004742,1732—18—Not enough data
200312100,0001—18—Not enough data
20022063,0001—18—Stable
20015174,6631—18—Not enough data
2000918,2331—18—Not enough data
19999114,0000—18—Not enough data
19981477,0003—18—Not enough data
199712125,0003—18—Not enough data
19967—0—17—Not enough data
19957—0—17—Not enough data
199430—0—17Not compared (before 2008)Stable
19922810,5001—17Not compared (before 2008)Stable
199134—2—17Not compared (before 2008)Stable
199028401—17Not compared (before 2008)Stable

All Infiniti Q45 model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2004 Infiniti Q45 have?

NHTSA recorded 7 consumer complaints for the 2004 Infiniti Q45 as of Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2004 Infiniti Q45 is reported most often?

Electrical system is named most often, in 3 complaints (43% of the total), followed by engine with 2.

Has the 2004 Infiniti Q45 been recalled?

NHTSA lists 2 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2004 Infiniti Q45 get?

The EPA rates the 2004 Infiniti Q45 (Q45, 4.5L 8-cyl) at 18 mpg combined, 16 city and 22 highway, with an estimated annual fuel cost of $4,550 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2004 Infiniti Q45 reported?

Among the 5 complaints that include a mileage, the median is 42,173 miles and the middle half falls between 37,600 and 95,000 miles; 60% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.