Technical Service Bulletins (TSBs) for the 1990 Wrangler are official communications between Jeep & their dealerships that describe processes for troubleshooting or fixing certain common problems. All vehicle manufacturers are required by U.S. law to make their TSBs available to the public.

    ENGINE AND ENGINE COOLING

    ENGINE AND ENGINE COOLING:COOLING SYSTEM

    • TSB #070397

      Date Announced:
      MAY 09, 1997
      NHTSA ID:
      #52963

      VARIOUS CAR OWNER'S HAVE EXPRESSED INTEREST IN USING ENGINE COOLANTS MADE WITH PROPYLENE GLYCOL INSTEAD OF ETHYLENE GLYCOL. *YC Read More »

    ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

    • TSB #RCL/617

      Date Announced:
      MAY 01, 1995
      NHTSA ID:
      #43047

      UNKNOWN Read More »

    • TSB #RCL/589

      Date Announced:
      NOV 01, 1994
      NHTSA ID:
      #37980

      HYDROCARBON AND CARBON MONOXIDE EMISSIONS LEVLS FOR THE ABOVE LISTED MODEL VEHICLES MAY EXCEED THE LIMITS ALLOWED BY CALIFORNIA EMISSIONS STANDARDS. Read More »

    ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

    • TSB #RCL/558

      Date Announced:
      APR 01, 1995
      NHTSA ID:
      #41032

      RECALL 558 - FAILURE OF THE OXYGEN SENSOR AND CATALYTIC CONVERTER MAY CAUSE A VEHICLE TO BE IN VIOLATION OF CALIFORNIA EMISSIONS STANDARDS. Read More »

    • TSB #RCL/557

      Date Announced:
      DEC 01, 1994
      NHTSA ID:
      #39014

      IT HAS BEEN DETERMINED THAT THE 1990 JEEP VEHICLE, EQUIPPED WITH THE 2.5L ENGINE, MAY BE IN VIOLATION OF FEDERAL EMISSIONS STANDARDS. Read More »

    ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)

    • TSB #RCL647

      Date Announced:
      OCT 01, 1995
      NHTSA ID:
      #46153

      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. Read More »

    ELECTRICAL SYSTEM

    ELECTRICAL SYSTEM:WIRING

    • TSB #080600

      Date Announced:
      FEB 25, 2000
      NHTSA ID:
      #609995

      THIS BULLETIN PROVIDES A REVISED WIRE SPLICE PROCEDURE AND RELATED PARTS. *TT Read More »

    STRUCTURE:FRAME AND MEMBERS

    • TSB #230397

      Date Announced:
      FEB 14, 1997
      NHTSA ID:
      #51942

      DIFFICULT TO CLEAN LIGHT COLORED "CHALKY" RESIDUE FROM PLASTIC BODY COMPONENTS THAT ARE MOLDED IN BLACK. *TW Read More »

    EQUIPMENT

    • TSB #D-20-02 Rev. A

      Date Announced:
      MAR 04, 2020
      NHTSA ID:
      #10175510

      DIPAP Requirements - Addition of Jeep Wrangler (JL/JK) and Jeep Gladiator (JT) Hard Top and Targa Top Panel Replacements - All Dealers (Rev. A) Read More »

    EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.

    • TSB #081698

      Date Announced:
      APR 17, 1998
      NHTSA ID:
      #600862

      INFORMATION ON INSTALLATION OF RADIO TRANSMITTING EQUIPMENT. *AK Read More »