2003 Toyota Prius Service and Repair Manual

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Factory-Grade Data

2003 Toyota Prius service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications, torque values, and reference data
  • Electrical diagnostics with full wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more
  • Diagnostic trouble codes and troubleshooting flow
  • Maintenance schedules and fluid capacities

Trims covered

  • Base

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Maintenance & Lubrication
  • Specifications
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Diagnostic Trouble Codes
  • Technical Service Bulletins
  • Wiring Diagrams

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Vehicle Safety Data

2003 Toyota Prius Recalls & Complaints

NHTSA #11V30400001/06/2011Component: STEERING:ELECTRIC POWER ASSIST SYSTEM

TOYOTA IS RECALLING CERTAIN MODEL YEAR 2001 THROUGH 2003 PRIUS PASSENGER CARS MANUFACTURED FROM JANUARY 28, 2000, THROUGH MAY 30, 2003. THE STEERING LINKAGE MAY LOOSEN, RESULTING IN REDUCED ELECTRIC

Consequence

LOSS OF POWER STEERING, PARTICULARLY WHEN AN OPERATOR IS ACTIVELY INTENDING TO STEER THE VEHICLE, MA

Remedy

TOYOTA WILL NOTIFY OWNERS AND DEALERS WILL REPLACE THE NUTS IN THE STEERING LINKAGE FREE OF CHARGE.

TSB #11029893

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 applicable model and model year Repair Manual while performing a rescue charge

TSB #11029892

OBSOLETE NOTICE February 13, 2026: This bulletin is now obsolete. Please see T-SB-0009-26.

TSB #11012744

The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicl

TSB #11012743

To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from weather elements and in

TSB #11012742

Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal areas such as the hood

TSB #11012735

Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal painted surfaces. This material protects from acid rain, environmental fallout, and rail contamination. Follow the Removal Procedure i

TSB #11012727

Vehicles may occasionally be subjected to contamination by airborne iron particles shed from railroad tracks, train wheels, exposure to heavy machinery facilities, grinding, welding, etc. This type of contamination can be identified by the

TSB #11007445

The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicl

Showing the 8 most recent of 133 technical service bulletins on file with NHTSA.

20140722Component: SEAT BELTSCrash reported1 injured

TL* THE CONTACT OWNS A 2003 TOYOTA PRIUS. THE CONTACT STATED THAT WHILE AT A TRAFFIC LIGHT, ANOTHER VEHICLE CRASHED INTO THE REAR END OF THE VEHICLE AND THE SEAT BELT FAILED TO RESTRAIN HER FROM HITT

20140619Component: AIR BAGSCrash reported1 injured

PURCHASED CAR ON EBAY FROM A PA DEALER, DID NOT KNOW, NOR WAS I TOLD THAT THE CAR HAD NO AIRBAG. WHETHER IT WAS REMOVED OR NOT REPLACED I DON'T KNOW. MY WIFE WAS DRIVING AND RECEIVED A COMPOUND FRAC

20080707Component: TIRESCrash reported1 injured

2003 TOYOTA PRIUS WAS PROCEEDING WEST ON I-40 NEAR KNOXVILLE, TN WHEN THE TREAD SEPARATED FROM THE LEFT REAR TIRE AND WRAPPED ITSELF AROUND THE AXLE CAUSING THE DRIVER TO LOSE CONTROL. THE CAR VEERED

20130829Component: STRUCTURE:BODYCrash reported

WHILE BACKING UP SLOWLY (UNDER 10), THE CAR SUDDENLY SPED UP, UNINTENDED ACCELERATED, TO HIT THE MOVABLE BARRIER AND ANOTHER CAR BEFORE BRAKED.

20070216Component: STEERING:ELECTRIC POWER ASSIST SYSTEMCrash reported

I WAS DRIVING EAST AT 50 MPH ON CALIFORNIA HWY 68 AT 0800. IT WAS RAINING BUT THERE WAS NO STANDING WATER. I WAS DRIVING A 2003 TOYOTA PRIUS. AS I CROSSED THE INTERSECTION WITH SAN BENANCIO ROAD T

Showing the 5 most serious of 123 complaints filed with NHTSA.

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