WenmarOpen by Wenmar Pro

Service bulletins for the 2003 Isuzu Ascender

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

173 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
0412S0012004-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. REVISED MODE ACTUATOR REPLACEMENT PROCEDURE (SERVICE MANUAL REVISION). *TT
0401S0012004-05-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REVISED DIAGNOSTIC TROUBLE CODE (DTC) P2135 (SERVICE MANUAL REVISION). *TT
0411S0012004-05-07. Service bulletin. STRUCTURE:BODY:DOOR. FRONT DOOR A-PILLAR WATER INTRUSION. *TT
0404S0012004-05-07. Service bulletin. ELECTRICAL SYSTEM. REPLACEMENT OF MIRROR ACTUATOR. *TT
0412S0042004-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. REAR HEATER & AIR CONDITIONING (A/C) PIPE REPLACEMENT/REPAIR. *TT
04050022004-05-07. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. INFORMATION ON 2-3 UP-SHIFT OR 3-2 DOWNSHIFT CLUNK SOUND. *TT
0412S0032004-05-07. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. J44551 AIR CONDITIONER SUCTION SCREEN KIT REPAIR RECOMMENDATIONS AND PROCEDURES AFTER COMPRESSION FAILURES. *TT
0402S0012004-04-16. Service bulletin. FUEL SYSTEM, OTHER. INTERMITTENT HESITATION, STUMBLE OR IDLE STALL AFTER SOAK, HARSH 1-2 SHIFT, SLIPPING 1-2 SHIFT FOLLOWED BY A HARSH ENGAGEMENT. *TT
0405S0022004-04-16. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). INOPERATIVE 4WD/AWD LAMP AND SYSTEM. *TT
0412S0022004-04-16. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. CERTAIN HVAC CONTROL HEAD MODULES ARE NOT REPROGRAMMABLE. *TT
0301390132004-03-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. REVISED MODE ACTUATOR REPLACEMENT PROCEDURE. *TT
0301S0052004-02-14. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REVISED DIAGNOSTIC TROUBLE CODE (DTC) P1125 (SERVICE MANUAL REVISION). *TT
0302350062004-02-10. Service bulletin. STEERING. REVISED STEERING WHEEL REPLACEMENT PROCEDURE. *TT
0305S0032003-12-19. Service bulletin. POWER TRAIN. SERVICE 4WD LIGHT ON, 4WD INOPERATIVE, DIAGNOSTIC TROUBLE CODES (DTC) C0300 AND/OR C0305. *TT
0304S0042003-12-16. Service bulletin. EQUIPMENT. REMOTE KEYLESS ENTRY INOPERATIVE. *TT
03V2692003-10-07. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. CERTAIN VEHICLES FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD 225 CHILD RESTRAINT ANCHORAGE SYSTEM BECAUSE THE OWNER'S MANUAL DOES NOT INCLUDE THE LOCATION SYMBOLS FOR THE LOWER UNIVERSAL ANCHORAGE SYSTEM OR EXPLAIN THE MEANING OF THE SYMBOLS. *TT
0301S0042003-10-07. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REVISED DIAGNOSTIC TROUBLE CODE (DTC) P0336 (ENGINE CONTROL SECTION OF THE SERVICE MANUAL). *TT THIS BULLETIN SUPERSEDES SB03-01-S004 DATED 08/01/2003. *TT
0304S0012003-10-03. Service bulletin. EQUIPMENT:ELECTRICAL. REMOTE KEYLESS ENTRY OPERATIONAL CHARACTERISTICS. *TT
0312S0012003-10-03. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. DIAGNOSING POOR AIR CONDITIONER PERFORMANCE, AIR CONDITIONER STOPS BLOWING COLD, AIR CONDITIONER CYCLES ON AND OFF. *TT
0306040332003-09-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. REVISED DIAGNOSTIC TROUBLE CODE P0336. *TT UPDATE. TO INCLUDE 2004 ISUZU NQR COMMERCIAL MODELS. *TT
0305S0022003-08-13. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. MECHANICAL OVERRIDE COULD ALLOW THE IGNITION KEY TO BE REMOVED WITH THE SHIFT LEVER IN A POSITION OTHER THAN PARK. AND CAN ALLOW THE TRANSMISSION TO BE SHIFTED OUT OF PARK WITH THE IGNITION IN THE OFF POSITION. F/CMVSS NONCOMPLIANCE RECALL. *TT
0306S0012003-06-25. Service bulletin. SUSPENSION. SQUEAK NOISE COMING FROM THE STEERING COLUMN WHILE TURNING THE STEERING WHEEL. *TT
0311S0022003-06-07. Service bulletin. STRUCTURE:BODY:DOOR. DOOR HARD TO CLOSE. 2003 ASCENDER. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.