Most common 2005 Isuzu Ascender problems
Share of the 64 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Isuzu Ascender complaints by model year
Best Ascender years: 2007, 2006. Years to avoid: 2005, 2004. Compare all years →
2005 Isuzu Ascender recalls (1)
Visibility › Windshield
Certain sport utility vehicles fail to comply with the requirements of federal motor vehicle safety standard no. 212, 'windshield mounting.' the windshield urethane bead May not have adhered to the body in certain areas during the cure process.
Remedy: Dealers will replace the windshield free of charge. The recall began on March 10, 2005. Owners May contact Buick at 1-866-608-8080, Chevrolet at 1-800-630-2438, or GMC at 1-866-996-9463.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2005 Isuzu Ascender:
Loss of Headlights
The subject vehicles are model year (MY) 2002-2009 Chevrolet Trailblazer, GMC Envoy, 2004-2007 Buick Rainier, 2003-2008 Isuzu Ascender, 2005-2009 Saab 9-7X, 2002-2004 Oldsmobile Bravada, 2003-2006 Chevrolet SSR, 2005-2009 Buick Lacrosse, and 2006-2008 Pontiac Grand Prix. This scope includes the Trailblazer/Envoy variants: 2002-2006 Envoy XL/Trailblazer EXT and 2004-2005 Envoy XUV.
What 2005 Isuzu Ascender owners say
Electrical system all 27 →
Driving at night on highway and my exterior lights will go completely off and only my high beams will come on but that's it. They'll come back on usually when I get to where I'm going and park the car but driving on the highway at night and all of the sudden your headlights go out is extremely dangerous. On three different occasions both the high beam and low beams went out. But on most occasions and now every occasion while driving at night the regular lowbeam headlights just go out randomly
It took a while before the electrical issues to progress where they where verifiable with solid symptoms as in transmission faults and poor performance along with loss of communication to steering wheel controls, ac and blower failure, radio etc. The full extent of what is affected and how it will progress as it had to this point is unknown to me or service people. The wiring has been modified and the ignition has been replaced 3 times to try and resolve this issue, and the effects of modification did not work and what that will bring about is unknown at this time. I have notified manufacture, but after I learned of this site and looked at Chevy trail blazer and Isuzu Ascender electrical issues ( same car ), it is clear to me that I am not alone and there is not a known fix for this hardware or possibly software issue. …
Fuel & propulsion system all 24 →
My 2005 isuszu Ascender had ; still has a problem associated with the fuel line and pump. I had about 75,000 miles on the car. We had been driving about 900 miles and my water pump went out, so we stopped in a Goodyear/ Firestone shop in rural mo. I had the water pump repaired. Fifteen minutes after the repair was done I stopped to refuel the car. After the pump shut off and I turned on the vehicle, my fuel gage read empty and was beeping on "e" as we drove out of gas station. After driving about 20 miles it registered as full. This continued for several fill ups. We drive far distances here in the midwest, I needed to know how much gas is in my tank at all times. I had fuel pump replaced, but now engine light stays on. My mechanic says that I need to have a pressure test at an Isuzu service center there is a leak of some type, related to my fuel line. …
I have been having issues with my gas gauge for about 3 weeks...at first I would fill up the tank or at least think it was full as the gauge would move all the way over to full then after I would stop pumping and turn on the car the gauge would go down to 3/4 tank and fluctuate back and forth between 3/4 and full over several days. Then yesterday I went and filled up and decided to not use the gauge as a measuring system and instead just let the pump go until it clicked off as it does when tank is full so I did this and the gauge went up to full then bounced back to empty and now my fuel low light is on and I cannot get any range reading on mileage for gas or anything. Also it should be noted that about that same 3 weeks ago my speedometer stopped working briefly starting off at 65 MPH at rest then it gradually made its way back down to zero at rest and has since seemed to be OK.
Air bags
I was driving east on interstate 10 in pensacola, florida. A vehicle traveling west lost control and came across the sloped grassy median, overturned an slid across my traffic lane, causing me to crash into their roof. My odometer says at the point of impact I was only traveling 48 MPH. Once I realized I was alive, I was in awe that the airbag did not deploy. I spoke to a manager at Isuzu in california. He requested the VIN number and some other personal information and said if the insurance company adjuster saw any manufacturer defects, then the insurance company would contact Isuzu. I also contacted my insurance provider, they said since I was not killed in the accident, they would not pursue anything with Isuzu. I thought someone should know because I was pinned in the vehicle and had to be cut out. …
I was driving our car ( 2005 Isuzu Ascender), having just exited the highway I was only going around 5- 8 MPH when out of no where and with no reason the side, and rear airbags unexpectedly deployoed. There was no reason for them to have deployed, no accident, impact, bumps or anything. One minute everything was fine the next there was a loud sound and the cabin filled with airbags and a horrible smell thankfully my children were not in the car because the way they exploded it would have surely caused them physical harm. Upon the airbags unexpectedly deploying the seatbelts locked up completely.
2005 Isuzu Ascender engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 4.2L 6-cyl | 4-speed automatic | RWD | 14 / 20 / 16 |
| 4.2L 6-cyl | 4-speed automatic | 4WD/AWD | 14 / 19 / 16 |
| 5.3L 8-cyl | 4-speed automatic | RWD | 13 / 19 / 15 |
| 5.3L 8-cyl | 4-speed automatic | 4WD/AWD | 13 / 18 / 15 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2005 Isuzu Ascender a good car?
Based on 64 owner complaints filed with NHTSA, the 2005 Ascender rates use caution: 1.7× as many complaints as a typical year of the Ascender at the same age. It is one of the Ascender years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2005 Isuzu Ascender?
The electrical system — 27 complaints, 42% of all complaints for this model year, most often about instrument cluster/panel. Next are the fuel & propulsion system (24) and air bags (9).
How many recalls does the 2005 Isuzu Ascender have?
There is 1 recall for the 2005 Isuzu Ascender, the most recent from February 3, 2005 (windshield). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Isuzu Ascender?
The best years by complaints, compared at the same age, are 2007 and 2006. Years to avoid or approach with caution: 2005 and 2004. See the full Isuzu Ascender years comparison.
At what mileage do 2005 Isuzu Ascender problems happen?
The median mileage reported in complaints is about 80,000 miles; 16% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.