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Service bulletins for the 2003 Toyota PRIUS

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.

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

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
T-TT-0365-15 Rev2018-04-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: A vehicle may arrive to the dealer with a MIL ?ON? condition and P0A80 or P1AC000 stored in the memory. Some cases have been identified with internal modification done to the HV Battery. Modified or altered parts are not covered under warranty.
T-SB-0101-11 Rev2017-08-14. Service bulletin. ELECTRICAL SYSTEM. TSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many lubricants, cleaners, and automotive chemicals contain silicone or other compounds that may contaminate electrical contacts, and therefore increase electrical resistance and decrease switch performance. The use of any cleaners or fluids may increase the risk of further damage to electrical components.
T-SB-0101-11 Rev2017-08-14. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM. TSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many lubricants, cleaners, and automotive chemicals contain silicone or other compounds that may contaminate electrical contacts, and therefore increase electrical resistance and decrease switch performance. The use of any cleaners or fluids may increase the risk of further damage to electrical components.
T-TT-0303-142017-08-01. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; HYBRID PROPULSION SYSTEM. Tech Tip: When a DTC is detected by the HV Battery ECU, the HV Control ECU will automatically store a P3000, Information Code 123 ?HV Battery Control System Malfunction? DTC. The purpose of the P3000/123 is to capture the state of the Hybrid Control System when the HV Battery ECU DTC sets. It does not indicate a malfunction of the HV Control ECU.
T-TT-0365-152017-03-28. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. TT: A VEHICLE MAY ARRIVE TO THE DEALER WITH A MIL “ON” CONDITION AND P0A80 STORED IN THE MEMORY. SOME CASES HAVE BEEN IDENTIFIED WITH INTERNAL MODIFICATION DONE TO THE HV BATTERY. MODIFIED OR ALTERED PARTS ARE NOT COVERED UNDER WARRANTY.
T-TT-0362-152017-03-28. Service bulletin. ELECTRICAL SYSTEM; ENGINE. TT: THE VEHICLE MAY BE DIFFICULT TO START OR HAVE AN ABNORMALLY LOW OR ROUGH IDLE AFTER THE BATTERY HAS BEEN DISCONNECTED OR POWER TO THE ENGINE ECM HAS BEEN INTERRUPTED.
T-SB-0012-13 REV2017-03-21. Service bulletin. ENGINE; ELECTRICAL SYSTEM. "TSB: FLASH REPROGRAMMING ALLOWS THE ECU SOFTWARE TO BE UPDATED WITHOUT REPLACING THE ECU. FLASH CALIBRATION UPDATES FOR SPECIFIC VEHICLE MODELS/ECUS ARE RELEASED AS FIELD-FIX PROCEDURES DESCRIBED IN INDIVIDUAL SERVICE BULLETINS. THIS BULLETIN DETAILS THE TECHSTREAM ECU FLASH REPROGRAMMING PROCESS AND OUTLINES USE OF THE TECHNICAL INFORMATION SYSTEM (TIS) AND THE CALIBRATION UPDATE WIZARD (CUW). FLASH CALIBRATION UPDATES CAN ONLY BE APPLIED TO THE VEHICLE/ECU COMBINATION FOR WHICH THEY ARE INTENDED. ECUS HAVE INTERNAL SECURITY THAT WILL NOT ALLOW THEM TO BE PROGRAMMED WITH ANOTHER ECU’S INFORMATION."
T-SB-0119-152017-03-02. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM. TSB: THIS BULLETIN INCLUDES BASIC PROCEDURES FOR PERFORMING A RESCUE CHARGE ON NI-MH HIGH VOLTAGE (HV) BATTERIES. THIS BULLETIN SHOULD BE USED IN CONJUNCTION WITH THE REPAIR MANUAL WHILE PERFORMING RESCUE CHARGE. THE GRX-5100 SHOULD BE USED WHEREVER THE REPAIR MANUAL REFERENCES THE TOYOTA HYBRID SYSTEM (THS) CHARGER.
T-TT-0395-162017-02-23. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. TT: HV BATTERIES HAVE LIQUID FILLED CELL MODULES, TO PREVENT LEAKAGE FROM CELLS, IT IS VERY IMPORTANT TO CONFIRM THE PROPER ORIENTATION MARK OF THE DRC.
SB-0180-092009-12-19. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ENGINE AND ENGINE COOLING:ENGINE. TOYOTA: SOME VEHICLES MAY EXHIBIT A MIL ON CONDITION IF AN ABNORMALLY LOW ENGINE POWER OUTPUT OR FAILURE TO START HAS BEEN DETECTED DURING A PARTICULAR THS DRIVE CYCLE. *PE
4415B2005-08-19. Service bulletin. ELECTRICAL SYSTEM. BODY ELECTRICAL - COMBINATION METER REPAIR MANUAL CORRECTION FOR 2003 TOYOTA PRIUS. 00400-RM957-U2. *TT
050052005-08-15. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. SPECIAL SERVICE CAMPAIGN (SSC) 40G - BATTERY MODIFICATION CHEMICAL UPDATE. *TT
040142004-11-23. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. SPECIAL SERVICE CAMPAIGN 40G. HV BATTERY MODIFICATION DATED 07/19/2004. *TT (REVISED). *TT
EL014032003-12-18. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. CUSTOMER MAY COMPLAIN OF NOT BEING ABLE TO START THEIR VEHICLES AFTER EXTENDED PARKING TIMES AND/OR REPEATED SHORT DRIVING TIMES. THE PURPOSE OF THIS BULLETIN IS TO INFORM OF A NEW BATTERY AND MOUNTING HARDWARE TO IMPROVE THE STORAGE CAPACITY PERFORMANCE. *TT
001012003-12-10. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. MAINTENANCE FOR HV AND AUXILIARY BATTERIES AT PORT AND DEALERS. REVISED. *TT
008032003-07-31. Service bulletin. ELECTRICAL SYSTEM. FUEL GAUGE INCLINATION METER RESET. *TT *JB
0325032003-05-02. Service bulletin. ELECTRICAL SYSTEM. MULTIPLEX COMMUNICATION SYSTEM - REPAIR MANUAL CORRECTION VOL I. *TT

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