2003 Toyota Avalon Service and Repair Manual

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Factory-Grade Data

2003 Toyota Avalon 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

  • XL
  • XLS

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 Avalon Recalls & Complaints

NHTSA #10V34500029/07/2010Component: STEERING

TOYOTA IS RECALLING CERTAIN MODEL YEAR 2000-2004 AVALON VEHICLES. DUE TO IMPROPER CASTING OF THE STEERING LOCK BAR, THERE IS A POSSIBILITY THAT A MINUTE CRACK MAY DEVELOP ON THE SURFACE OF THE LOCK B

Consequence

SHOULD THE STEERING LOCK BAR BREAK, THE STEERING WHEEL WOULD LOCK AND THE DRIVER WOULD LOSE THE ABIL

Remedy

DEALERS WILL REPLACE THE STEERING INTERLOCK DEVICE FREE OF CHARGE. THE SAFETY RECALL BEGAN ON SEPTE

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

TSB #11007444

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 #11007443

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

Showing the 8 most recent of 110 technical service bulletins on file with NHTSA.

20070306Component: VEHICLE SPEED CONTROLCrash reported3 injured

TL* THE CONTACT OWNS A 2003 TOYOTA AVALON. WHILE PARKING THE VEHICLE THE ACCELERATOR PEDAL ENGAGED WITHOUT WARNING. THE CONTACT WAS DRIVING 5 MPH. THE CONTACT DEPRESSED THE BRAKES AND THE VEHICLE WO

20150128Component: VEHICLE SPEED CONTROLCrash reported2 injured

TL* THE CONTACT OWNS A 2003 TOYOTA AVALON. THE CONTACT STATED THAT WHILE THE BRAKE PEDAL WAS DEPRESSED, THE ENGINE REVVED AND THE VEHICLE ABRUPTLY ACCELERATED. AS A RESULT, THE CONTACT CRASHED THE VEH

20140602Component: AIR BAGSCrash reported2 injured

I WAS INVOLVED IN A COLLISION WHERE MY PASSENGER SIDE FRONT TIRE CAME OFF OF A LEDGE IN A CONSTRUCTION ZONE AT WHICH POINT I LOST CONTROL OF THE VEHICLE. THERE WAS NO BARRIER IN PLACE ON THAT SIDE. I

20140602Component: STRUCTURE:BODYCrash reported2 injured

I WAS INVOLVED IN A COLLISION WHERE MY PASSENGER SIDE FRONT TIRE CAME OFF OF A LEDGE IN A CONSTRUCTION ZONE AT WHICH POINT I LOST CONTROL OF THE VEHICLE. THERE WAS NO BARRIER IN PLACE ON THAT SIDE. I

20140602Component: ENGINECrash reported2 injured

I WAS INVOLVED IN A COLLISION WHERE MY PASSENGER SIDE FRONT TIRE CAME OFF OF A LEDGE IN A CONSTRUCTION ZONE AT WHICH POINT I LOST CONTROL OF THE VEHICLE. THERE WAS NO BARRIER IN PLACE ON THAT SIDE. I

Showing the 5 most serious of 353 complaints filed with NHTSA.

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