"How reliable is the 2004 Infiniti M45?"

"Based on 49 NHTSA complaints, the 2004 Infiniti M45 has a median complaint mileage of 85249 miles. The most common issue is FUEL SYSTEM, GASOLINE."

"What are common problems with the 2004 Infiniti M45?"

"The most frequently reported component in NHTSA complaints for the 2004 Infiniti M45 is FUEL SYSTEM, GASOLINE, accounting for a significant portion of the 49 total complaints filed."

2004 Infiniti M45: Reliability Data

Source: NHTSA — 49 complaints

Total Complaints

85,249mi

Median Mileage

FUEL SYSTEM, GASOLINE

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

64,889 25th Percentile

85,249 Median Mileage

115,625 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

FUEL SYSTEM, GASOLINE

ENGINE

ELECTRICAL SYSTEM

FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM

SEATS

FUEL SYSTEM, OTHER

AIR BAGS:SIDE/WINDOW

AIR BAGS:FRONTAL

ENGINE AND ENGINE COOLING

EXTERIOR LIGHTING:BRAKE LIGHTS

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"TL*THE CONTACT OWNS A 2004 INFINITI M45. THE DRIVER SIDE FRONT SEAT WAS UNSTABLE SINCE THE SEAT BRACKET WAS BROKEN. THE VEHICLE WAS TAKEN TO THE DEALER, AND THE TECHNICIAN CONCLUDED THAT THE BRACKET HAS WEAK SPOTS THAT CAUSED CRACKS IN THE WELD. THE WARRANTY HAS EXPIRED AND THE CONTACT IS REQUIRED ..."

"TL*THE CONTACT OWNS A 2004 INFINITI M45. WHEN THE CONTACT ADDED FUEL TO THE GAS TANK HE NOTICED THAT THE FUEL GAUGE WOULD CONSTANTLY FLUCTUATE WITHOUT GIVING THE DRIVER AN ACCURATE READING. THE VEHICLE WAS TAKEN TO THE DEALERSHIP WHERE THE CONTACT WAS INFORMED THAT THE FUEL SENDING UNIT NEEDED TO BE..."

"TL*THE CONTACT OWNS A 2004 INFINITI M45. HE TOOK THE VEHICLE TO DEALER FOR THE AIR BAG RECALL CONNECTOR IN 2009 AND HE NOTICED THAT AIR BAG LIGHT REMAINED ILLUMINATED. HE TOOK THE VEHICLE TO A DIFFERENT DEALER WHO CONFIRMED THAT THE RECALL REPAIR WAS NOT PERFORMED. HE CONTACTED THE MANUFACTURER WHO ..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28