1990 Jeep Wrangler TSBs
12 manufacturer communications for the 1990 Jeep Wrangler sit in NHTSA's public file. A TSB is factory repair guidance, not a recall — the repair is not automatically free. The 1990 Wrangler problem report covers complaints, recalls, and investigations.
What the bulletins cover
Service bulletins
DIPAP Requirements - Addition of Jeep Wrangler (JL/JK) and Jeep Gladiator (JT) Hard Top and Targa Top Panel Replacements - All Dealers (Rev. A)
SUBJECT REGARDING WIRE SPLICE REPAIRS.
THIS BULLETIN PROVIDES A REVISED WIRE SPLICE PROCEDURE AND RELATED PARTS.
INFORMATION ON INSTALLATION OF RADIO TRANSMITTING EQUIPMENT.
VARIOUS CAR OWNER'S HAVE EXPRESSED INTEREST IN USING ENGINE COOLANTS MADE WITH PROPYLENE GLYCOL INSTEAD OF ETHYLENE GLYCOL.
CONCERNS WITH ENGINE COOLANT USAGE.
DIFFICULT TO CLEAN LIGHT COLORED "CHALKY" RESIDUE FROM PLASTIC BODY COMPONENTS THAT ARE MOLDED IN BLACK.
APPLIES TO VEHICLES EQUIPPED WITH A 4.2L ENGINE AND FEDERAL HIGH ALTITUDE EMISSION CONTROL SYSTEM. FUEL VAPORS MAY CAUSE DETERIORATION OF THE PCV HARNESS ASSEMBLY. THE PCV HARNESS ASSEMBLY MUST BE REPLACED AND THE ENGINE IDLE SPEEDS MUST BE RESET.
UNKNOWN
RECALL 558 - FAILURE OF THE OXYGEN SENSOR AND CATALYTIC CONVERTER MAY CAUSE A VEHICLE TO BE IN VIOLATION OF CALIFORNIA EMISSIONS STANDARDS. TO CORRECT THIS CONDITION, THE OXYGEN SENSOR AND CATALYTIC CONVERTER MUST BE REPLACED WITH IMPROVED DESIGN PARTS.
IT HAS BEEN DETERMINED THAT THE 1990 JEEP VEHICLE, EQUIPPED WITH THE 2.5L ENGINE, MAY BE IN VIOLATION OF FEDERAL EMISSIONS STANDARDS. HYDROCARBON, CARBON MONOXIDE AND OXIDES OF NITROGEN LEVELS COULD BE ABOVE ALLOWABLE LIMITS, WHICH WERE ESTABLISHED TO PROTECT THE PUBLIC HEALTH…
HYDROCARBON AND CARBON MONOXIDE EMISSIONS LEVLS FOR THE ABOVE LISTED MODEL VEHICLES MAY EXCEED THE LIMITS ALLOWED BY CALIFORNIA EMISSIONS STANDARDS. TO CORRECT THE CONDITION, THE PCV HARNESS, CHOKE VACUUM DIAPHRAGM, EGR VALVE AND DECEL VALVE, IF EQUIPPED, MUST BE REPLACED.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.