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Infiniti Q45Model year report

1998 Infiniti Q45 Problems

Complaints
14filed with NHTSA
Median mileage
77,000miles, 5 complaints with mileage
Recalls
3campaigns 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, 4.1L 8-cyl RWD · 16 city / 22 hwy

Sources: NHTSA records for the 1998 Infiniti Q45 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 14 consumer complaints for the 1998 Infiniti Q45. The part named most often is air bags, with 6 complaints (43% of the total), followed by electrical system (2) and brakes (1). 5 of the complaints include a mileage, and 0% of those were filed for vehicles with under 50,000 miles; the median is 77,000 miles. Of all complaints, 4 involved a crash, 1 a fire, 8 an injury, according to the filers. NHTSA lists 3 recall campaigns and 30 technical service bulletins for this model year. Air bags complaints overlap with 4 technical service bulletins filed under the same part. Electrical system complaints overlap with 2 recall campaigns and 6 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

Air bags: “While driving at approximately 35 MPH the owner hit a vehicle on the front right side. Upon impact, the air bags failed to deploy. The driver and passenger sustained injuries, but did not seek immediate medical attention. The impact was so great that it pushed back the frame rail one inch. The consumer is questioning whether or not the vehicle even has air bags and wants nissan to inspect the vehicle.”

NHTSA complaint #10115140, filed 2005-09, 76,002 miles

Electrical system: “The car was parked after driving the car for approx 1.5 miles and after about 15 20 minutes restauarant attendant inquired who owns that car? And informed that there is smoke coming out of the car. 911 was called for fire dept help. Fire fighters extinquished the fire.”

NHTSA complaint #762141, filed 2002-05

Brakes: “Brake system fails to adequately stop vehicle. Lso, vehicle will intermittently surge while brakes are being applied. Dealership has examined vehicle, but cannot find a remedy for the problem. Consumer feels this could be related to brake booster failure.”

NHTSA complaint #6900670, filed 2001-12

Engine cooling: “The contact owns a 1998 Infiniti Q45. The contact indicated that the service engine sensor illuminated and there was a loss of power. The contact stated that the vehicle stalled on several occasions. The contact was able to restart the vehicle after several attempts. The vehicle was taken to an independent repair shop who was not able to replicate or diagnose the failure. The contact was not included in recall NHTSA campaign id number: 03v455000 (engine and engine cooling). The manufacturer was notified of the failure. The approximate failure mileage was 100,000.”

NHTSA complaint #10639792, filed 2014-09, 100,000 miles

Mileage when problems were reported

0% of the 5 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 76,002 and 100,000 miles.

0%0–100%10–250%25–500%50–7560%75–10040%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: 77,000 miles.

Complaints by year filed

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

199920002001200232003200520112014
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 1998 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 RWD4.1L 8-cyl4-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 1998 Infiniti Q45 → · Check a VIN at nhtsa.gov/recalls

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. 30 on record; the latest 10 are shown.

See all 30 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 1998 Infiniti Q45 have?

NHTSA recorded 14 consumer complaints for the 1998 Infiniti Q45 as of Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 1998 Infiniti Q45 is reported most often?

Air bags is named most often, in 6 complaints (43% of the total), followed by electrical system with 2.

Has the 1998 Infiniti Q45 been recalled?

NHTSA lists 3 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 1998 Infiniti Q45 get?

The EPA rates the 1998 Infiniti Q45 (Q45, 4.1L 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 1998 Infiniti Q45 reported?

Among the 5 complaints that include a mileage, the median is 77,000 miles and the middle half falls between 76,002 and 100,000 miles; 0% 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.