2003-2008 Isuzu Ascender: Full Review

Updated: 11/23/08

2004 Isuzu Ascender
2008 Isuzu Ascender
View the Photo Gallery

2003-2008 Isuzu Ascender 

  • Price Range:  $7,200 - $16,400
CG Rating

55

out of 100

About our Road Test

Related to Isuzu Ascender

View Another Vehicle

Learn about the year-to-year changes and reliability for the 2003-2008 Isuzu Ascender and our price chart details a range of prices based on vehicle mileage and condition.

Pros

  • Passenger room
  • Cargo room
  • Trailer-towing capability

Cons

  • Fuel economy
  • Steering/handling

Vehicle Highlights

Isuzu replaced the aging Trooper for 2003 with a new flagship, based upon the extended-length version of General Motors' midsize sport-utility vehicles. Like its Chevrolet TrailBlazer EXT/GMC Envoy XL cousins, the new Ascender seated up to seven passengers on three rows of seats. Offered with six-cylinder or V8 power, it came with a four-speed automatic transmission. Trooper had been limited to five passengers and V6 power. Ascenders were available with rear-wheel drive or GM's 4WD system, which could be left engaged on dry pavement and included low-range gearing. Antilock four-wheel disc brakes and front side airbags were standard, but no curtain side airbags were offered. Also available were traction control for rear-drive models, and GM's OnStar assistance system. S, LS, and Limited versions roughly mimicked TrailBlazer's LS, LT, and LTZ models in equipment. Ascenders came with Isuzu's 3-year/50,000-mile bumper-to-bumper warranty and 10-year/120,000-mile powertrain warranty, versus GM's 3-year/36,000-mile coverage. Maximum towing capacity was 7200 pounds. Rivals included the Dodge Durango, Ford Explorer, Honda Pilot, and Toyota Highlander/4Runner.

Expert Ratings Summary (view detailed report)

Category Isuzu Ascender S 4WD 6-cyl Rating
Performance 6
Fuel Economy 4
Ride Quality 5
Steering/Handling/Braking 3
Quietness 4
Controls/Materials 7
Interior Room 7
Room/Comfort (rear) 6
Cargo Capacity 8
Value within Class 5
Total Score: 55
Learn about the year-to-year changes of the 2003-2008 Isuzu Ascender. Get full details of the styling and performance changes throughout the history of the 2003-2008 Isuzu Ascender.

Year to Year Changes


2004 Isuzu Ascender: Front side airbags and remote keyless entry became options rather than standard equipment in the Ascender's second season. Later in the year, a five-passenger model debuted, based on regular-length GM midsize SUVs.
2005 Isuzu Ascender: Now Isuzu's sole model as the Axiom and Rodeo SUVs departed, the Ascender gained a gas-saving feature. The V8 now had GM's Displacement on Demand system, which automatically deactivated four of the cylinders to save fuel under certain lighter-load conditions. Newly optional head-protecting curtain side airbags, which covered the first and second rows of seats, replaced seat-mounted airbags.
2006 Isuzu Ascender: Little change for the 2006 Ascender. Curtain side airbags were optional.
2007 Isuzu Ascender: Isuzu's SUV loses its seven-passenger versions and available V8 engine for 2007. Ascender is a retrimmed Chevrolet TrailBlazer/GMC Envoy; the GM versions also offer only five-passenger models for '07. Available OnStar assistance is dropped for 2007, but power-adjustable pedals remain among the options.
2008 Isuzu Ascender: The 2008 Isuzu Ascender SUV was largely unchanged. Note that Isuzu announced plans to discontinue sales of light-duty vehicles in North America during calendar 2009.

Our road test for the 2003-2008 Isuzu Ascender includes a full evaluation from the inside out. We've evaluated every aspect of the 2003-2008 Isuzu Ascender and highlighted the vehicle's performance with pros and cons. Use our comprehensive road test ratings to decide if this generation 2003-2008 Isuzu Ascender is right for you.

Consumer Guide® Road-Test Evaluation

Unstressed in everyday driving, the Ascender delivers acceptable acceleration. Test regular-length six-cylinder Ascenders did 0-60 mph in 8.8 seconds. Seven-seat versions weigh about 350 pounds more. In them, the six-cylinder is still adequate, but a V8 adds useful muscle for hauling or towing heavy loads. As for gas mileage, test regular-length Envoys and Ascenders have averaged 12.1 to 17.4 mpg. An extended-length 2WD six-cylinder Ascender averaged 12.1 mpg in all-city driving. A V8 model logged 15.2 to 15.7 mpg. GM claimed Displacement on Demand improved mpg by up to 8 percent in certain light-load driving conditions. The Ascender's suspension absorbs bumps quite well for an SUV, extendeds better than regular-length. Without the air suspension available on GMC's Envoy, though, these Ascenders also porpoise through dips and swells. Handling is disappointing overall, with considerable body lean in sharp turns. Steering has vague feel and demands a lot of correction at highway speed. A relatively tight turning radius makes close-quarters maneuvering fairly easy. Standard antilock four-wheel disc brakes deliver adequate stopping power, but quick stops trigger marked nosedive and some wander. Optional traction control on 2WD models has worked well in snow. Wind rush can be considerable at highway speeds; there's roar even around a closed sunroof. The six-cylinder engine cruises quietly enough, but sounds gruff when cold and a touch ragged at full throttle. The V8 is quieter overall. Controls are clear and handy. Switchgear works smoothly, but adjusting the low-mounted climate controls forces a long look away from the road. Front-seat head and leg room are good, even for taller folks. Seats are too soft for optimal support, but not uncomfortable. Visibility is restricted aft and over-the-shoulder by headrests and thick roof pillars. Available power-adjustable pedals could be helpful, especially to shorter drivers. Six-footers have plenty of second-row head room. Rear knee room is adequate in regular-length versions, ample in extended, and both have adequate under-seat foot space despite an uneven floorboard. The split bench seat is comfortable, fairly supportive, and wide enough for three adults with a little squeezing. With seven-passenger seating, second-row seats slide forward and tilt up for accessing the third-row seat, which is roomy enough for two adults and more comfortable than those in most midsize SUVs. Cargo space is generous in regular-length Ascenders, spacious in extendeds. The 60/40 split seat folds easily, helped by automatic-folding headrests. However, instead of a flat load floor with all seats folded, Ascender has a tiered floor that frustrates easy loading and packing. The liftgate's separate-opening glass is relatively high, making it difficult to load some items. Cabins have a good array of pockets and compartments for small items.
Value for the Money
Though Ascenders match most rivals for pace and space, Isuzu's longer warranty doesn't fully compensate for a spotty dealer network. Additionally, Isuzu's financial woes put the company's future in doubt, especially since Ascender is the only model that remained after 2005. Shoppers considering Ascender would do well to ponder the similar GMC Envoy instead.

Expert Ratings Summary

Category Isuzu Ascender S 4WD 6-cyl Rating
Performance 6
Fuel Economy 4
Ride Quality 5
Steering/Handling/Braking 3
Quietness 4
Controls/Materials 7
Interior Room 7
Room/Comfort (rear) 6
Cargo Capacity 8
Value within Class 5
Total Score: 55

Each vehicle report contains one rating chart for representative model. Consumer Guide® rates in ten key areas: Performance, Fuel Economy, Ride Comfort, Steering and Handling, Interior Noise, Controls and Materials, Driver Room, Passenger Room, Cargo Capacity, and Insurance Costs. These ratings compare the particular vehicle rated to ALL other vehicles, not a vehicle's standing in a particular class. In the ratings table, "1" is the lowest rating and "10" is the highest rating.
Our reliability study for this generation Isuzu Ascender includes details on average repair costs, manufacturer recalls, and everything you need to know to gauge the long-term reliability of this generation Isuzu Ascender .

Trouble Spots

Consumer Guide's® Auto Editors have scoured repair bulletins and questioned mechanics to search for commonly occurring problems for a particular vehicle. In some cases we also give possible manufacturer-suggested solutions. In many instances these trouble spots are Technical Service Bulletins posted by the manufacturer, however, we have our own expert looking at additional vehicle problems.

Air conditioner: The A/C system may quit working intermittently due to failure of the low pressure switch on the compressor. (2003)

Battery: The battery may go dead because the ignition switch may not be in the fully off position, even with the key removed requiring replacement of the ignition switch. (2003-05)

Clutch: A rumbling noise at just below 55 mph is caused by the normal full lockup of the torque converter clutch; and the vibration is transmitted to the passenger compartment by the rear springs which must be replaced. (2003-05)

Electrical problem: The instrument panel may quit working and the transmission may default to second or third gear due to no voltage to the transmission solenoid. (2003-06)

Electrical problem: Transmission may upshift too quickly and even engage the lockup converter below 20 mph due to an electrical short that tricks the powertrain control module into believing the transfer case is shifted into four-wheel low range. (2003-04)

Vehicle noise: Various noises from the front end due to prematurely worn stabilizer links. (2003-04)

Water leak: Water on the front floor may be due to one or more leaks at the A-pillar near the windshield. (2003-05)

Consumer Guide® Estimated Repair Costs

This table lists costs of likely repairs for comparison with other vehicles. The dollar amount includes the cost of the part(s) and labor (based on $50 per hour) for the typical repair without extras or add-ons. Like the pricing information, replacement costs can vary widely depending on region. Expect charges at a new-car dealership to be slightly higher.
Item Name Repair Cost
A/C Compressor $860
Alternator $555
Automatic Transmission or Transaxle $650
Brakes $745
Clutch, Pressure Plate, Bearing $3,050
Constant Velocity Joints
Exhaust System $2,140
Radiator $455
Shocks and/or Struts $1,820
Timing Chain or Belt $830
Our price chart for this generation Isuzu Ascender details a range of prices in year-by-year listings based on vehicle mileage and condition.
Prices Good Average Poor
2008
Ascender 5-pass. $15,000-18,000 $13,700-16,400 $9,500-11,300
2007
Ascender 5-pass. $13,200-16,500 $12,000-15,000 $7,700-9,600
2006
Ascender 5-pass. $11,700-15,000 $10,500-13,500 $6,400-8,300
Ascender 7-pass. $12,500-17,000 $11,300-15,300 $7,100-9,700
2005
Ascender 5-pass. $10,200-13,500 $9,200-12,200 $5,300-7,000
Ascender 7-pass. $11,000-15,000 $9,900-13,500 $5,900-8,100
2004
Ascender 5-pass. $8,800-11,800 $7,900-10,600 $4,600-6,100
Ascender 7-pass. $9,600-13,200 $8,600-11,900 $5,000-6,900
2003
Ascender $8,000-11,500 $7,200-10,400 $4,100-5,900
This chart details a range of prices in year-by-year listings for vehicles in three condition levels:
Good: a clean low-mileage, solid-running vehicle that needs little or no repair.
Average: a car with normal miles on the odometer, perhaps a few scrapes or dings; engine might need a minor repair or two, but runs acceptably well.
Poor: might have potentially dangerous problems with the engine and/or body, or abnormally high mileage; definitely in need of mechanical attention. Valuations reflect wholesale prices paid by dealers at auction, and retail prices on used-car lots. Each range covers all trim levels and engine types for a vehicle with a typical amount of equipment--usually an automatic transmission, air conditioning, stereo, etc. Fully loaded vehicles may cost more. Average mileage is 12,000 miles per year. Keep in mind that these are guidelines only. Actual selling prices vary- especially from region to region.
Specs for this generation Isuzu Ascender include everything from fuel mileage to seating capacity to options availability.

Vehicle Dimensions

Specification Extended 4-door wagon
Wheelbase, in. 129.0
Overall Length, in. 207.6
Overall Width, in. 76.1
Overall Height, in. 75.5
Curb Weight, lbs. 4954
Cargo Volume, cu. ft. 107.4
Standard Payload, lbs. --
Fuel Capacity, gals. 25.0
Seating Capacity 7
Front Head Room, in. 40.2
Max. Front Leg Room, in. 41.4
Rear Head Room, in. 39.6
Max. Rear Leg Room, in. 37.0

Specifications Key: NA = not available; "--" = measurement does not exist.


Powertrain Options and Availability

Two powertrains have been available in early Ascenders: either a 275-horsepower 4.2-liter inline six-cylinder engine or a 285-horsepower 5.3-liter V8, each mated to a four-speed automatic transmission. For 2005, the V8 gained Displacement on Demand technology and a 300-hp rating. Six-cylinder engines rose to 291 horsepower in 2006. Isuzu's SUV loses its available V8 engine for 2007.
Engines Size liters /
cu. in
Horse- power Torque Transmission:
EPA city/hgwy
Consumer Guide Observed
dohc I6 4.2 / 256 291 277 4-speed automatic: 15/21 4-speed automatic: --
ohv V8 5.3 / 327 285 325 4-speed automatic: 14/18 4-speed automatic: 15.5
dohc I6 4.2 / 256 275 275 4-speed automatic: 15/20 4-speed automatic: 14.8
ohv V8 5.3 / 327 300 330 4-speed automatic: 14/19 4-speed automatic: --

Specifications Key: NA = not available; "--" = measurement does not exist.

Built In:  USA
Drive Wheels: longitudinal front-engine/rear- or 4-wheel drive
Detailed safety information for this generation Isuzu Ascender include detailed crash test scores from the NHTSA.

NHTSA Crash-Test Results

Test 2003 Ascender
Front Impact, Driver 3
Front Impact, Passenger 3

The National Highway Traffic Safety Administration (NHTSA) tests a vehicle's worthiness in front- and side-impact collisions and rates its resistance to rollovers. Front-impact crash-test numbers indicate the chance of serious injury: 5 = 10% or less; 4 = 10-20%; 3 = 20-35%; 2 = 35-45%; 1 = More than 45%. Sideimpact crash-test numbers indicate: 5 = 5% or less; 4 = 6-10%; 3 = 11-20%; 2 = 21-25%; 1 = More than 26%. Rollover resistance numbers indicate the chance for rollover when the vehicle leaves the roadway: 5 = Less than 10%; 4 = 10-20%; 3 = 20-30%; 2 = 30-40%; 1 = More than 40%.

Learn about official auto recalls, reliability issues, and vehicle problems for the 2003-2008 Isuzu Ascender directly from the NHTSA and manufacturers.

NHTSA Recall History

2003 Ascender: Rear side closure latch on some vehicles sold in certain states may not latch or unlatch due to corrosion caused by road splash.
2003-04 Ascender: In certain vehicles, moving turn-signal lever up or down may cause front marker/turn lights and rear turn lights to flash in a manner similar to hazard warning.
2005 Ascender: In a crash, windshield might not be retained, due to improper urethane bead adherence.
2006 Ascender: During extreme steering maneuvers, the power steering hose on some vehicles may fracture and leak fluid, causing loss of power assistance and increased steering effort.
2006 Ascender: Tire and loading information label may show inaccurate vehicle capacity weight.

Car Buying Resources

Trade-in Calculator

Research how much your car is truly worth.

Trade-in Calculator

Used Cars

Search online classifieds and find a local dealer.

Search Local Listings

Vehicle History Report

Get a CARFAX Vehicle History Report. The first...

Get a CARFAX report

What's Under the Hood?

Learn about how cars work.

Learn Things

Insurance

We're dedicated to making insurance easier.

Get Insurance

Sell Your Car

Reach over 8 million buyers.

Sell Your Car

Search
Local Listings


to

submit

Vehicle
History Report

CARFAX

FREE CARFAX Record Check

Looking at a used car, check for costly hidden problems before
you buy.

Go
Advertisement
Advertisement