"How reliable is the 2005 Bmw 645Ci?"

"Based on 47 NHTSA complaints, the 2005 Bmw 645Ci has a median complaint mileage of 88645 miles. The most common issue is AIR BAGS."

"What are common problems with the 2005 Bmw 645Ci?"

"The most frequently reported component in NHTSA complaints for the 2005 Bmw 645Ci is AIR BAGS, accounting for a significant portion of the 47 total complaints filed."

2005 Bmw 645Ci: Reliability Data

Source: NHTSA — 47 complaints

Total Complaints

88,645mi

Median Mileage

AIR BAGS

Top Issue

Crash Reports

When Do Complaints Happen?

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

66,925 25th Percentile

88,645 Median Mileage

102,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

AIR BAGS

SEAT BELTS

ELECTRICAL SYSTEM

ENGINE

SERVICE BRAKES, HYDRAULIC

SEATS

STEERING

UNKNOWN OR OTHER

ENGINE AND ENGINE COOLING

EXTERIOR LIGHTING

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THE CAR WAS DRIVEN HOME FROM WORK, APPROXIMATELY 15 MILES, AND WAS PARKED IN THE GARAGE OF OUR HOME. TEN MINUTES LATER IT COMBUSTED AND BEGAN BURNING FROM THE ENGINE COMPARTMENT. IT BURNED TO THE GROUND AND GUTTED OUR HOUSE."

"TL*- THE CONTACT OWNS A 2005 BMW 645I WITH A CURRENT ODOMETER READING OF 26000 MILES. THE CONTACT STATED THAT WHILE DRIVING UNDER DRY CONDITIONS AT ABOUT 5 MPH HE FELT AN ELECTRIC SHOCK IN HIS BUTTOCKS FROM THE SEAT. THE CONTACT REPOSITIONED HIMSELF IN THE SEAT AND FELT THE SHOCK AGAIN, AND THIS T..."

"HOT SPOT IN THE BACK OF THE DRIVER'S SEAT FROM THE SEAT HEATER. THE FAILURE WAS THE HEATING ELEMENT BURNED A NICKEL-SIZED HOLE THROUGH THE LEATHER SEAT, THROUGH MY WINTER COAT, AND SINGED MY PANTS. THIS HAPPENED WHILE I WAS DRIVING BUT STOPPED AT A LIGHT. I WAS ABLE TO PULL OVER ONCE I NOTICED THE S..."

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