2012 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
- Base
- Limited
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
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2012 Toyota Avalon vehicles. During a vehicle repair, the seat belt inner buckles may have been replaced with parts that may inc
If the seat belt is falsely interpreted as being buckled, in the event of a crash, the air bags may
Toyota will notify owners, and dealers will test the seat belt assembly to verify that it is properl
Toyota is recalling certain model year 2012-2013 Avalon, Avalon HV, Venza, Camry, and Camry HV vehicles. In the affected vehicles, the drain hose for the air conditioning condenser may become clogged
A short circuit may cause the air bags to become disabled or inadvertently deploy. An inadvertent a
Toyota will notify owners, and dealers will seal the air conditioning condenser unit housing and ins
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2011-2019 Corolla, 2011-2013 Matrix, 2012-2018 Avalon, and 2013-2018 Avalon Hybrid vehicles. During certain crashes, the air ba
In the event of a crash, air bags and/or seat belt pretensioners that do not deploy as intended may
Toyota will notify owners, and dealers will inspect the ECU and install a noise filter between the a
Some 2005 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Servic
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
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
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
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
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
Some 2005 2024 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Servic
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 156 technical service bulletins on file with NHTSA.
TL* THE CONTACT OWNED A 2012 TOYOTA AVALON. THE FRONTAL AIRBAGS FAILED TO DEPLOY WHEN AN 18 WHEELER COLLIDED INTO THE VEHICLE WHILE TRAVELLING AT 65 MPH. THE CAUSE OF THE FAILURE WAS UNKNOWN. T
TL* THE CONTACT OWNED A 2012 TOYOTA AVALON. THE FRONTAL AIRBAGS FAILED TO DEPLOY WHEN AN 18 WHEELER COLLIDED INTO THE VEHICLE WHILE TRAVELLING AT 65 MPH. THE CAUSE OF THE FAILURE WAS UNKNOWN. T
MY VEHICLES AIRBAGS DID NOT DEPLOY I WAS HIT BY AN 18 WHEELER AT A HIGH RATE OF SPEED. THE VEHICLE HAD AT LEAST 2 REAR END HITS BY THIS 18 WHEELER ESTIMATED AT A SPEED IN EXCESS OF 25 MILES PER HO
TL* THE CONTACT OWNS A 2012 TOYOTA AVALON. THE CONTACT STATED THAT WHILE AT A COMPLETE STOP, ANOTHER VEHICLE CRASHED INTO THE REAR OF THE CONTACT'S VEHICLE, CAUSING THE CONTACT TO CRASH INTO ANOTHER
TL* THE CONTACT OWNS A 2012 TOYOTA AVALON. THE CONTACT STATED THAT WHILE AT A COMPLETE STOP, ANOTHER VEHICLE CRASHED INTO THE REAR OF THE CONTACT'S VEHICLE, CAUSING THE CONTACT TO CRASH INTO ANOTHER
Showing the 5 most serious of 35 complaints filed with NHTSA.
