There are 13 owner-reported fuel system complaints for the 2004 Isuzu Ascender in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
RECALL HAS BEEN ISSUED ON FAULTY GAS TANK. HAD CAR INSPECTED BY ISUZU FACILITY 2/4/16 AND NEW PART(S) ORDERED. CANNOT GET ANY INFORMATION AS TO WHEN PART WILL BE IN AND MY CAR REPAIRED. IN THE MEANTIME, DRIVING WITH FAULTY, GAS-LEAKING, PROBABLY DANGEROUS CAR. GM APPARENTLY NOT COMMUNICATING WITH ISUZU AND PARTS NOT GETTING PRODUCED.
FUEL TANK HAS LEAKING SEALS, WHICH IS CAUSING FUEL TO LEAK AND THE SMELL OF FUEL INTO CABIN AREA OF VEHICLE AND VEHICLE REJECTED DURING STATE INSPECTION. PART NOT AVAILABLE UNTIL AFTER MAY.TOOK IT TO REPAIR FACILITY, WAS TOLD IT WAS UNSAFE TO DRIVE THEN WAS TOLD TO COME PICK UP THE VEHICLE. ISUZU UNWILLING TO OFFER ANY ASSISTANCE
MY CAR HAS SMELLED OF GAS AND I HAVE BEEN TOLD THERE IS A FRACTURE IN MY FUEL TANK INLET CHECK VALVE. THIS HAS BEEN A PROBLEM WITH THE 7 PASSENGER ASCENDER BUT THEY ARE DOING NOTHING WITH THE 5 PASSENGER ASCENDER THOUGH IT IS THE EXACT SAME PART THAT IS FAULTY. I HAVE CONTACTED ISUZU AND AM TAKING INTO THEIR SERVICE CENTER BUT I WANT THIS COMPLAINT ON RECORD IN CASE SOMETHING SHOULD HAPPEN SUCH AS MY CAR EXPLODING. THE FUMES INSIDE THE CAR ARE SO NOXIOUS THEY ARE MAKING ME SICK AND I HAVE TO DRIVE WITH THE WINDOWS DOWN. *TR
I HAVE A 2004 ISUZU ASCENDER. MY CHECK ENGINE LIGHT CAME ON SO I TOOK IT TO A DEALER TO HAVE IT CHECKED OUT. I WAS TOLD THAT THE CAR HAD A FUEL THANK INLET FRACTURE. A SERVICE BULLETIN WAS RELEASED BUT NO RECALL. I BOUGHT THIS CAR BRAND NEW, IT WILL COST ME $2178.33 +TAX TO HAVE IT REPAIRED.AFTER DOING SOME RESEARCH I HAVE FOUND OTHER OWNERS WITH THE SAME PROBLEM. I THINK THAT SOMETHING SHOULD B DONE ABOUT THIS. I CONTACTED AN AUTHORIZED DEALER AND MY CAR IS NOT IN THE RECALL MODELS. I THINK THAT THIS A MANUFACTURE' PROBLEM AND IT SHOULD BE TAKEN CARE OF BEOFRE SOMETHING SERIOUS HAPPENS
CONTINUOUS GAS SMELL IN AND AROUND AUTOMOBILE WHEN STARTING THE ENGINE. ENGINE LIGHT CAME ON IN JAN 2013 ALTHOUGH THE SMELL HAS BEEN PRESENT FOR MANY YEARS. TOOK AUTO TO REPAIR SHOP AND DISCOVERED THAT THEIR WAS A SIZEABLE CRACK AT THE OPENING OF THE GAS TANK. AROUND 1,500 DOLLARS LATER A NEW GAS TANK, NEW FUEL PUMP ASSEMBLY, I FIND IT HARD TO BELIEVE THERE IS NO RECALL ON THIS PART FROM GM, ESPECIALLY SINCE SEARCHING THE INTERNET AND DISCOVERING HOW MANY HAVE REPORTED THIS SAME EXACT ISSUE AND THE SCARY THOUGHT THAT THE CAR COULD HAVE BLOWN UP AND ANY TIME. A CLASS ACTION SUIT NEEDS TO BE FILED AGAINST GM. *TR
TL* THE CONTACT OWNS A 2004 ISUZU ASCENDER. THE CONTACT STATED THAT THE CHECK ENGINE WARNING LIGHT ILLUMINATED AND THE VEHICLE WOULD SHAKE ABNORMALLY WHEN DRIVING VARIOUS SPEEDS. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE VEHICLE WAS DIAGNOSED AND THE CONTACT WAS ADVISED THAT THE FUEL TANK WAS FRACTURED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE AND THE CURRENT MILEAGES WERE APPROXIMATELY 107,000.
TL* THE CONTACT OWNS A 2004 ISUZU ASCENDER. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT WAS ILLUMINATED AND THE VEHICLE WAS TAKEN TO THE DEALER. AFTER DIAGNOSIS THEY ADVISED HER THAT THE FUEL TANK WAS FRACTURED BUT THERE WAS NO SIGN OF CORROSION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND THEY OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS APPROXIMATELY 80,000.
FUEL LEAK FROM GAS TANK, FILLER NECK MEETS PLASTIC INLET TO TANK. PLASTIC INLET FROM FUEL TANK LEAKS FUEL AND DOES NOT HOLDING PRESSURE CAUSING MLS P0442,P0455. CANNOT FILL TANK TO CAPACITY, TANK WILL LEAK ON INCLINE OR ON ACCELERATION. *TT
FUEL TANK LEAKS SPILLING FUEL AT ALL TIMES. HAVE BEEN TOLD BY MECHANIC THAT THE FUEL FILLER NECK WAS ULTRASONICALLY WELDED TO THE FUEL TANK AND THAT THE SEAM DID NOT HOLD. HE REPORTED SEEING THIS ON SEVERAL VEHICLES, DIFFERENT MAKE, SAME BODY STYLE. *TR
STRONG GASOLINE ODOR INSIDE AND OUTSIDE OF VEHICLE. *TR
MY 2004 ISUZU ASCENDER REQUIRED THE FUEL TANK BE REPLACED AS THERE WAS A CRACKED WELD ON THE FUEL NECK. ISUZU DID HAVE A SERVICE BULLETIN ON THIS YEAR MODEL, BUT YET I WAS TOLD MY VEHICLE DID NOT QUALIFY OR MET THE CRITERIA. *TR
MY CHECK ENGINE LIGHT CAME ON AND I TOOK IT IN TO HAVE A DIAGNOSTIC CHECK AND I WAS INFORMED THAT MY 2004 ISUZU ASCENDER HAD A CRACK IN THE GAS TANK DUE TO FAULTY EQUIPMENT. THERE ARE GAS FUMES IN THE CAR AS WELL. I CONTACTED THE MANUFACTURER WHO STATES THAT THERE ARE BULLETINS FOR THIS PROBLEM FOR THE 2003 AND 2004 ASCENDERS HOWEVER MY VEHICLE WILL NOT BE COVERED. *TR
ENGLISH: PLASTIC GAS TANK BROKE IN THE CONNECTION TO THE PIPE OR HOSE WHEN ENTERING THE GASOLINE TO THE GAS TANK. SPANISH : LA CONECCION DEL TANQUE CON EL TUBO O MANGA POR DONDE ENTRA LA GASOLINA AL TANQUE DE GASOLINA DE ISUZU ASCENDER SE ROMPE CREANDO PROBLEMA DE DERRAME DE GASOLINA SI SE LLENA EL TANQUE. EL TANQUE ES PLASTICO. EN EL DEALER EL TECNICO INDICA QUE ESTO SYA A SUCEDIDO VARIAS VECES CON OTRAS UNIDADES PERO QUE LA GARANTIA CUBRE SIEMPRE Y CUANDO TENGA MENOS DE 2 ANOS O 24,000MILLAS. ESTO ES UN RIEGO SEVERO A LA SEGURIDAD Y PUEDE CREAR SE INCENDIE EL VEHICULO. *AK
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Sep 8, 2026