Technical Service Bulletins (TSBs) for the 1991 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 #110798

      Date Announced:
      JUL 31, 1998
      NHTSA ID:
      #602327

      THE OUTER EXHAUST MANIFOLD STUDS MAY FATIGUE AND BREAK. *YC Read More »

    • TSB #98698

      Date Announced:
      SEP 01, 1997
      NHTSA ID:
      #54225

      RECALL NOTIFICATION AND PROCEDURE ON CATALYTIC CONVETER AND CARBURETOR. *YC Read More »

    ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

    • TSB #110798

      Date Announced:
      DEC 11, 1998
      NHTSA ID:
      #603108

      OUTER EXHAUST MANIFOLD STUDS MAY FATIGUE/BREAK. *AK Read More »

    • TSB #110798

      Date Announced:
      JUL 31, 1998
      NHTSA ID:
      #602327

      THE OUTER EXHAUST MANIFOLD STUDS MAY FATIGUE AND BREAK. *YC 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 »