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Infiniti Q45Model year report

1991 Infiniti Q45 Problems

Complaints
34filed with NHTSA
Median mileage
—no mileage reported
Recalls
2campaigns on record
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA crash rating
—overall rating starts with 2011 models
EPA fuel economy
17 mpgcombined, 4.5L 8-cyl RWD · 15 city / 20 hwy

Sources: NHTSA records for the 1991 Infiniti Q45 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 34 consumer complaints for the 1991 Infiniti Q45. The part named most often is equipment, with 7 complaints (21% of the total), followed by brakes (6) and suspension (5). Of all complaints, 3 involved a crash, 4 a fire, 3 an injury, according to the filers. NHTSA lists 2 recall campaigns and 26 technical service bulletins for this model year. Equipment complaints overlap with 1 recall campaign covering the radio/tape deck/cd etc. and 9 technical service bulletins filed under the same part. Brakes complaints overlap with 3 technical service bulletins filed under the same part.

Not compared (before 2008). Model years 2008–2023 of the same vehicle that have at least 25 complaints are compared, and a model needs at least 3 of them.

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.

Also reported: Other or unknown (1), Body and structure (1), Tires (1), Wheels (1).

Example complaints

Equipment: “Front speakers began malfunctioning less than an hour after a recall service replacing the rear speaker amplifiors. Recall notice stated that rear speakers could malfunction and cause a fire. The notice warned that if a pop was heard to turn off the system. Within less than an hour of the recall service the front speakers began to occasinally pop and then go off and on. The cassette player also began to malfunction for the first time , go off and on and plays tapes at an acceleated rate of speed. …”

NHTSA complaint #709110, filed 1999-07

Suspension: “When switching gears from park to drive vehicle hesitates, consumer also, when traveling there is a lound noise coming from the front end, transmission slipping. Consumer has contacted the dealer, dealer stated fuel filter line needed replacing. Please provide any further details.”

NHTSA complaint #844944, filed 1999-08

Complaints by year filed

Trend: stable. Complaints filed in the last 3 full calendar years are within 25% of the 3 years before.

19951996199719981999112000200120022004
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 1991 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-cyl4-speed automatic152017$4,850
Q45 Full-Active Suspension RWD4.5L 8-cyl4-speed automatic131715$5,500

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 1991 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. 26 on record; the latest 10 are shown.

See all 26 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 1991 Infiniti Q45 have?

NHTSA recorded 34 consumer complaints for the 1991 Infiniti Q45 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 1991 Infiniti Q45 is reported most often?

Equipment is named most often, in 7 complaints (21% of the total), followed by brakes with 6.

Has the 1991 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 1991 Infiniti Q45 get?

The EPA rates the 1991 Infiniti Q45 (Q45, 4.5L 8-cyl) at 17 mpg combined, 15 city and 20 highway, with an estimated annual fuel cost of $4,850 at 15,000 miles a year. Other engine and drive versions are rated differently.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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.