"How reliable is the 2005 Isuzu Ascender?"

"Based on 84 NHTSA complaints, the 2005 Isuzu Ascender has a median complaint mileage of 80000 miles. The most common issue is ELECTRICAL SYSTEM."

"What are common problems with the 2005 Isuzu Ascender?"

"The most frequently reported component in NHTSA complaints for the 2005 Isuzu Ascender is ELECTRICAL SYSTEM, accounting for a significant portion of the 84 total complaints filed."

2005 Isuzu Ascender: Reliability Data

Source: NHTSA — 84 complaints

Total Complaints

80,000mi

Median Mileage

ELECTRICAL SYSTEM

Top Issue

Crash Reports

When Do Complaints Happen?

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

62,860 25th Percentile

80,000 Median Mileage

96,031 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ELECTRICAL SYSTEM

FUEL SYSTEM, GASOLINE

FUEL/PROPULSION SYSTEM

AIR BAGS

ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

EXTERIOR LIGHTING

VEHICLE SPEED CONTROL

POWER TRAIN

AIR BAGS:SIDE/WINDOW

FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"DT: THE CONTACT STATES TWO ENGINE LIGHTS COME ON AND THE VEHICLE IMMEDIATELY LOST POWER, BUT DID NOT STALL. WHEN SHE TRIED TO DEPRESS THE ACCELERATOR PEDAL NOTHING HAPPENED. THE CONTACT PULLED THE VEHICLE OVER AND HAD IT TOWED TO THE DEALERSHIP. THIS HAPPENED FOUR SEPARATE TIMES. THE DEALERSHI..."

"DT*: THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS WITH PRESSURE APPLIED TO THE GAS PEDAL AFTER THE VEHICLE WAS RECENTLY DECELERATED OR STOPPED, THE RPM GAUGE SPIKED REALLY HIGH THEN SLAMMED DOWN. THE ENGINE LIGHT ILLUMINATED AND IMMEDIATELY TURNED OFF. THE VEHICLE WAS TAKEN TO 3 SEPARATE DEALER..."

"WHILE DRIVING AT SLOW SPEEDS VEHICLE WILL CUT OFF. YOU LOSE STEERING AND BRAKES DO NOT WORK WELL. FIRST FAILURE WAS 3 WEEKS AFTER PURCHASE. VEHICLE WAS PURCHASED NEW. THREE DEALERSHIPS HAVE ATTEMPTED TO FIX TO NO AVAIL. MANUFACTURER WAS NOTIFIED TWICE WITH NO RESOLUTION. *NM"

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