How many NHTSA complaints have been filed about the 2003 Isuzu Ascender?

35 NHTSA complaints have been filed about the 2003 Isuzu Ascender between 2003-07-10 and 2013-11-05. Top reported components: ELECTRICAL SYSTEM (9), EXTERIOR LIGHTING (7), FUEL SYSTEM (7). Source: NHTSA Office of Defects Investigation.

2003 Isuzu Ascender Recalls, Issues & Maintenance

The 2003 Isuzu Ascender carries 5 open NHTSA recalls — most recently covering owners/service/other manual and automatic transmission. No recurring owner-reported issue clusters are on file. Isuzu stopped selling passenger vehicles in the United States after the 2008 model year, though its commercial truck business is still here, which means parts and knowledgeable service have not disappeared the way they did for some discontinued brands. One item matters more than everything else on this list. The 3.2 and 3.5 liter V6 in the Rodeo, Trooper, Amigo, Axiom, and VehiCross uses a rubber timing belt, and on the double overhead cam versions a broken belt bends valves. If you own one of these and cannot document the last belt change, that is the first call to make. The later models are easier: the Ascender is a Chevrolet TrailBlazer, the i-280 through i-370 are Chevrolet Colorados, the Hombre is an S-10, and the Oasis is a Honda Odyssey. For those, the donor brand's parts and specs apply.

5 Open Recalls

Source: NHTSA

EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

Campaign #03V269000 · Jul 21, 2003

Issue: CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 225, "CHILD RESTRAINT ANCHORAGE SYSTEM." THE OWNER'S MANUAL DOES NOT EXPLAIN THE MEANING OF THE LOCATION SYMBOLS FOR THE LOWER UNIVERSAL ANCHORAGE SYSTEM.

Risk: THIS DOES NOT COMPLY WITH THE STANDARD.

Fix: OWNERS WILL BE PROVIDED WITH A SUPPLEMENT FOR THEIR OWNER'S MANUAL. IT DESCRIBES AND SHOWS THE LOCATION SYMBOLS FOR THE CHILD RESTRAINT ANCHORS THAT ARE LOCATED IN THE VEHICLE. OWNER NOTIFICATION BEGAN AUGUST 15, 2003. OWNERS SHOULD CONTACT ISUZU AT 1-800-255-6727.

POWER TRAIN:AUTOMATIC TRANSMISSION

Campaign #03V213000 · May 6, 2003

Issue: CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 114, "THEFT PROTECTION." THESE VEHICLES ARE EQUIPPED WITH A MECHANICAL OVERRIDE THAT COULD ALLOW THE IGNITION KEY TO BE REMOVED WITH THE SHIFT LEVER IN A POSITION OTHER THAN PARK. IN ADDITION, THESE VEHICLES HAVE AN OVERRIDE THAT CAN ALLOW THE TRANSMISSION TO BE SHIFTED OUT OF PARK WITH THE IGNITION IN THE OFF POSITION.

Risk: THESE OVERRIDES ARE NOT PERMITTED UNLESS THE VEHICLE HAS A LOCKING STEERING COLUMN.

Fix: DEALERS WILL ELIMINATE THESE CONDITIONS BY DISABLING THE OVERRIDES. OWNER NOTIFICATION BEGAN JUNE 13, 2003. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT ISUZU AT 1-800-255-6727.

VISIBILITY:WINDSHIELD WIPER/WASHER

Campaign #04V061000 · Apr 2, 2004

Issue: CERTAIN SPORT UTILITY VEHICLES HAVE WINDSHIELD WIPER SYSTEMS THAT WILL NOT TURN ON, CEASE OPERATION WHILE IN USE, FAIL TO TURN OFF/ON BY THEMSELVES (MOISTURE SENSITIVE WIPER SYSTEM), OR HAVE CONTINUOUS WINDSHIELD WASHER PUMP OPERATION BECAUSE THE PRESENCE OF WATER WITHIN THE WIPER MODULES CAN EITHER CAUSE A SHORT CIRCUIT OR CAN LEAD TO THE CORROSION OF COMPONENTS WITHIN THE MODULE.

Risk: DEPENDING ON THE OCCURRENCE AND WEATHER SITUATION, DRIVER VISIBILITY COULD BE REDUCED, WHICH COULD RESULT IN A CRASH.

Fix: DEALERS WILL REPAIR THE WINDSHIELD WIPER SYSTEM ASSEMBLY. THE RECALL BEGAN ON JULY 15, 2004. OWNERS SHOULD CONTACT ISUZU AT 1-800-255-6727.

LATCHES/LOCKS/LINKAGES:DOORS:LATCH

Campaign #05V494000 · Oct 27, 2005

Issue: CERTAIN SPORT UTILITY VEHICLES HAVE A REAR SIDE CLOSURE LATCH THAT MAY NOT LATCH OR UNLATCH DUE TO CORROSION CAUSED BY ROAD SPLASH, SUCH AS WATER AND ROAD SALT. THESE VEHICLES WERE ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE FOLLOWING STATES: CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, IOWA, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, MINNESOTA, MISSOURI, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WEST VIRGINIA, WISCONSIN, AND THE DISTRICT OF COLUMBIA.

Risk: IF THE DOOR IS NOT LATCHED PROPERLY AND IT GOES UNNOTICED, IT MAY OPEN WHILE THE VEHICLE IS IN MOTION. IF AN UNBELTED OCCUPANT FELL OUT OF THE VEHICLE, PERSONAL INJURIES COULD OCCUR.

Fix: DEALERS WILL INSTALL A SEAL ALONG THE LOWER PART OF THE ROCKER PANEL TO PREVENT INTRUSION OF CORROSIVE MATERIAL, AND INSPECT THE REAR SIDE CLOSURE LATCHES. FUNCTIONAL LATCHES WILL BE CLEANED AND LUBRICATED. NON-FUNCTIONING LATCHES WILL BE REPLACED. THE RECALL BEGAN ON FEBRUARY 24, 2006. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, OR ISUZU AT 1-800-255-6727.

EXTERIOR LIGHTING:TURN SIGNAL

Campaign #05V198000 · May 5, 2005

Issue: ON CERTAIN TRUCKS AND SPORT UTILITY VEHICLES, THE DRIVER WISHING TO SIGNAL A TURN BY MOVING THE DIRECTIONAL SIGNAL LEVER, (UP OR DOWN) MAY CAUSE THE FRONT MARKER/TURN LIGHTS AND REAR TURN LIGHTS TO FLASH IN A MANNER SIMILAR TO HAZARD WARNING, RATHER THAN FLASHING ON THE DESIRED SIDE ONLY.

Risk: THE DRIVER MAY NOT BE ABLE TO CLEARLY SIGNAL THEIR INTENTIONS TO TURN, CHANGE TRAVEL LANES, OR POTENTIALLY WARN OTHERS OF AN IMPAIRED VEHICLE OPERATING CONDITION INCREASING THE RISK OF A CRASH.

Fix: DEALERS WILL REPLACE THE SUSPECT FLASHER MODULES WITH A NEW FLASHER MODULE DESIGNED WITH SEALED RELAYS AND MORE DURABLE CONTACT MATERIAL INSIDE OF THE RELAYS FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 4, 2005. ISUZU BEGAN MAILING OWNER LETTERS ON AUGUST 4, 2005. OWNERS MAY CONTACT CHEVROLET AT 1-800-630-2438, GMC AT 1-866-996-9463, ISUZU AT 1-800-255-6727, BUICK AT 1-866-608-8080, AND OLDSMOBILE AT 1-800-630-6537.

Recall data refreshed Jul 20, 2026.

Known issues for this vehicle

What drivers and federal regulators have officially reported about the 2003 Isuzu Ascender.

Reported to NHTSA

Transfer Case & Differential Fluid (4WD models)

Every 30,000 mi

Change every 30,000 miles, and right away after any deep water crossing. Front and rear differentials and the transfer case each hold their own fluid. Limited-slip rear axles need the friction modifier added when refilled.

Estimated cost — typical U.S. ranges

Dealer

~$105–$140

Shop

~$75–$100

DIY

~$15–$40

AWD/4WD vehicles only. Easy drain-and-fill on most platforms.

Automatic Transmission Fluid

Every 45,000 mi

Drain and fill every 45,000 miles, or every 30,000 if you tow. Fluid spec follows the drivetrain: Isuzu or Dexron III for the original models, Dexron VI for the GM based Ascender and i-series, and Honda fluid for the Oasis.

Estimated cost — typical U.S. ranges

Dealer

~$330–$500

Shop

~$235–$355

DIY

~$60–$180

Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.

Spark Plugs

Every 60,000 mi

Around 60,000 miles on conventional plugs, up to 100,000 on platinum. Rear bank access on the V6 is tight, so this is often worth pairing with other top-end work.

Estimated cost — typical U.S. ranges

Dealer

~$285–$390

Shop

~$200–$275

DIY

~$25–$100

Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.

Engine Air Filter

Every 30,000 mi

Replace every 30,000 miles, or every 15,000 if the truck sees dirt roads or trail use.

Occupant deaths in fatal crashes (FARS)

2 crashes 2010–2024

FARS counts every occupant death in a fatal crash, whatever the cause — it does not mean the vehicle was at fault or defective. Counts are not adjusted for how many of each vehicle are on the road. How to read this number

Owner-reported problem signals

Separate from the federal fatality data above: complaints owners filed with NHTSA about this year and model. These are reports of problems, unverified, and are counted here only as signals.

complaints mentioning a crash

complaints mentioning a fire

Open recalls for this vehicle

Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.

How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.

This maintenance schedule for the 2003 Isuzu Ascender reflects Isuzu's published service intervals. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

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