"How reliable is the 2005 Buick Terraza?"

"Based on 195 NHTSA complaints, the 2005 Buick Terraza has a median complaint mileage of 56158 miles. The most common issue is ELECTRICAL SYSTEM."

"What are common problems with the 2005 Buick Terraza?"

"The most frequently reported component in NHTSA complaints for the 2005 Buick Terraza is ELECTRICAL SYSTEM, accounting for a significant portion of the 195 total complaints filed."

2005 Buick Terraza: Reliability Data

Source: NHTSA — 195 complaints

195

Total Complaints

56,158mi

Median Mileage

ELECTRICAL SYSTEM

Top Issue

Crash Reports

When Do Complaints Happen?

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

20,000 25th Percentile

56,158 Median Mileage

89,450 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM

ELECTRONIC STABILITY CONTROL (ESC)

SERVICE BRAKES

ELECTRICAL SYSTEM:HORN

STEERING

TRACTION CONTROL SYSTEM

LATCHES/LOCKS/LINKAGES

ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC)

SUSPENSION

LATCHES/LOCKS/LINKAGES:DOORS:LATCH

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"ALL BUICK TERRAZAS (ALSO PONTIAC SV6) VIOLATE 49CFR571.101 IN THAT THE NEEDLES FOR THE INSTRUMENT GAUGES ARE NOT ILLUMINATED WHEN THE IGNITION IS ON. THEY ARE ILLUMINATED ONLY IF THE IGNITION IS OFF. I CALLED THIS IN ON 1/19/2005, HOWEVER, I'M USING THIS FORM TO MAIL IN MY COMPLAINT MORE EXPEDITIO..."

"CONSUMER STATED,WHENEVER THE VEHICLE WAS STARTED, HE WAS UNABLE TO SEE THE NEEDLE OR THE DIAL ON ANY OF THE GAUGES ON THE DASHBOARD. THE DEALER WAS NOTIFIED. THE DEALER INFORMED THE CONSUMER THAT WAS THE NORMAL CHARACTERISTIC OF THAT VEHICLE AND NOTHING ELSE CAN BE DONE. THE CONSUMER HAS A CONCERN T..."

"DT: THE CONSUMER OWNS A 2005 BUICK TERRAZA. THE ONLY THE WAY THE HORN WILL WORK IS BY TAKING BOTH OF HER THUMBS AND PRESSING AS HARD AS SHE CAN TO GET THE HORN TO BLOW IN THE LEFT HAND CORNER THAT IS THE ONLY SPOT THAT IT WILL WORK. THE HORN HAS NOT WORKED SINCE SHE PURCHASED THE VEHICLE. SHE FILE..."

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