"How reliable is the 2003 Cadillac Deville?"

"Based on 208 NHTSA complaints, the 2003 Cadillac Deville has a median complaint mileage of 68500 miles. The most common issue is ELECTRICAL SYSTEM."

"What are common problems with the 2003 Cadillac Deville?"

"The most frequently reported component in NHTSA complaints for the 2003 Cadillac Deville is ELECTRICAL SYSTEM, accounting for a significant portion of the 208 total complaints filed."

2003 Cadillac Deville: Reliability Data

Source: NHTSA — 208 complaints

208

Total Complaints

68,500mi

Median Mileage

ELECTRICAL SYSTEM

Top Issue

Crash Reports

When Do Complaints Happen?

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

38,751 25th Percentile

68,500 Median Mileage

112,717 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM

AIR BAGS

ENGINE

STEERING

POWER TRAIN:AUTOMATIC TRANSMISSION

UNKNOWN OR OTHER

VEHICLE SPEED CONTROL

VISIBILITY:POWER WINDOW DEVICES AND CONTROLS

SERVICE BRAKES

POWER TRAIN

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THE FACTORY INSTALLED JACK COLLASPED DROPPING VEHICLE TO THE GROUND. CONSUMER STATES' THESE JACKS ARE MADE SPECIFICALLY TO FIT CADILLAC CARS. CONSUMER CAN'T GO OUT AND BY ANY JACK. PLEASE PROVIDE ANY FURTHER INFORMATION. TS"

"2003 CADILLAC DEVILLE FUEL SYSTEM PROBLEM CAUSED THE ENGINE TO STOP RUNNING TWICE ONCE AT APROX 35 MILES PER HOUR, AND AGAIN AT 50 MILES PER HOUR.THE SECOND TIME WAS AFTER THE DEALER HAD TAKEN THE CAR TO FIX AND RETURNED IT TELLING US THE PROBLEM WAS FIXED AND WAS SAFE TO DRIVE.THE NEXT DAY IT ST..."

"THE ELECTRICAL SYSTEM FAILED, WHICH CAUSED THE INSTRUMENT PANEL TO BE INOPERATIVE.*JB"

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