Technical Service Bulletins (TSBs) for the 1991 LS 400 are official communications between Lexus & 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.

    STEERING

    • TSB #ST010101

      Date Announced:
      FEB 16, 2001
      NHTSA ID:
      #619796

      SUBJECT REGARDING STEERING WHEELNUT SERVICE SPECIFICATION. *TT Read More »

    SUSPENSION

    • TSB #01202

      Date Announced:
      OCT 11, 2002
      NHTSA ID:
      #10000251

      SUSPENSION BALL JOINT INSPECTION METHOD. *TT Read More »

    PARKING BRAKE

    • TSB #L-SB-0010-13

      Date Announced:
      FEB 21, 2013
      NHTSA ID:
      #10133849

      A new Special Service Tool (SST 09709-00002) has been introduced to aid in the inspection procedure for certain vehicles equipped with a floor pedal-type parking brake system. Read More »

    ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

    • TSB #EG95002

      Date Announced:
      APR 01, 1995
      NHTSA ID:
      #41099

      RADIATOR RESERVOIR TANK SUB-ASSEMBLY AND SUPPLY PARTS. *TW Read More »

    POWER TRAIN:AUTOMATIC TRANSMISSION

    • TSB #L-SB-0082-14

      Date Announced:
      OCT 16, 2014
      NHTSA ID:
      #10109444

      TSB: The purpose of this bulletin is to provide precautions to follow when installing an automatic transmission/transaxle assembly to avoid MIL "ON" shifting issues and/or transmission damage. Read More »

    • TSB #L-SB-0007-11 Rev

      Date Announced:
      OCT 16, 2014
      NHTSA ID:
      #10109445

      TSB: The purpose of this service bulletin is to provide information regarding the installation of the correct torque converter bolts during automatic transmission/transaxle assembly replacement. Read More »

    • TSB #L-SB-0041-11 Rev

      Date Announced:
      OCT 16, 2014
      NHTSA ID:
      #10109447

      TSB: OBSOLETE NOTICE-October 16, 2014: This bulletin is now obsolete. Please see L-SB-0082-14. Read More »

    • TSB #L-SB-0041-11 Rev

      Date Announced:
      OCT 01, 2013
      NHTSA ID:
      #10132108

      This bulletin is now obsolete. Please see L-SB-0082-14. Read More »

    POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER

    • TSB #L-SB-0007-11 Rev

      Date Announced:
      OCT 16, 2014
      NHTSA ID:
      #10109445

      TSB: The purpose of this service bulletin is to provide information regarding the installation of the correct torque converter bolts during automatic transmission/transaxle assembly replacement. Read More »

    ELECTRICAL SYSTEM

    • TSB #L-SB-0066-11 Rev

      Date Announced:
      APR 10, 2015
      NHTSA ID:
      #10111205

      LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Read More »

    • TSB #L-SB-0066-11 Rev

      Date Announced:
      APR 10, 2015
      NHTSA ID:
      #10111398

      LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Read More »

    VISIBILITY

    • TSB #L-SB-0092-13

      Date Announced:
      DEC 19, 2013
      NHTSA ID:
      #10132004

      The following procedures are recommended during routine maintenance or in the event of a customer concern for wiper performance. Read More »

    • TSB #L-BO-004-05 Obso

      Date Announced:
      DEC 19, 2013
      NHTSA ID:
      #10132006

      This bulletin is now obsolete. Please see L-SB-0092-13. Read More »

    AIR BAGS

    • TSB #L-TT-0111-13

      Date Announced:
      JAN 16, 2014
      NHTSA ID:
      #10131964

      Lexus vehicles are equipped with Supplemental Restraint Systems (SRS), including various airbags and in some models, seat belt pre-tensioners, to help reduce the risk of injury in a collision. Read More »

    • TSB #L-TT-0111-13

      Date Announced:
      JAN 16, 2013
      NHTSA ID:
      #10133923

      Lexus vehicles are equipped with SRS, including various airbags and in some models, seat belt pre-tensioners, to help reduce the risk of injury in a collision. Read More »

    SEAT BELTS

    • TSB #BO00501

      Date Announced:
      MAR 23, 2001
      NHTSA ID:
      #619119

      SUBJECT REGARDING NEW SEAT BELT TONGUE PLATE STOPPER SERVICE PARTS. *TT Read More »

    EQUIPMENT

    • TSB #Lexus Safety Re

      Date Announced:
      MAY 01, 2020
      NHTSA ID:
      #10176283

      Safety Recall and Service Campaign - Technician Certification Requirements Read More »

    • TSB #L-SB-0179-17 Obs

      Date Announced:
      APR 06, 2020
      NHTSA ID:
      #10174889

      TSB: OBSOLETE NOTICE April 06, 2020: This bulletin is now obsolete. Please see L-SB-0008-20. Replacement Certification Labels and VIN Plates Read More »

    • TSB #L-SB-0008-20

      Date Announced:
      APR 06, 2020
      NHTSA ID:
      #10174888

      TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin Nos. Read More »

    • TSB #L-SB-0010-13

      Date Announced:
      FEB 21, 2013
      NHTSA ID:
      #10133849

      A new Special Service Tool (SST 09709-00002) has been introduced to aid in the inspection procedure for certain vehicles equipped with a floor pedal-type parking brake system. Read More »

    EQUIPMENT:ELECTRICAL

    • TSB #L-SB-0066-11 Rev

      Date Announced:
      APR 10, 2015
      NHTSA ID:
      #10111205

      LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Read More »

    • TSB #L-SB-0066-11 Rev

      Date Announced:
      APR 10, 2015
      NHTSA ID:
      #10111398

      LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Read More »

    EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

    • TSB #L-SB-0048-08 Obs

      Date Announced:
      DEC 05, 2017
      NHTSA ID:
      #10131653

      TSB: Replacement Certification Labels. OBSOLETE NOTICE November 28, 2017: This bulletin is now obsolete. Please see L-SB-0179-17. Read More »

    • TSB #L-TT-0031-10

      Date Announced:
      NOV 07, 2013
      NHTSA ID:
      #10132083

      Adhesive & sealant cross reference Information Read More »