2020 Toyota 4Runner Service and Repair Manual

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Factory-Grade Data

2020 Toyota 4Runner 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

  • Limited
  • Nightshade
  • SR5 Premium
  • SR5
  • TRD Off-Road
  • TRD Off-Road Premium
  • TRD Pro
  • Venture

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

2020 Toyota 4Runner Recalls & Complaints

NHTSA #22V48000006/07/2022Component: EQUIPMENT:OTHER:LABELS

Southeast Toyota Distributors, LLC (SET) is recalling certain 2020-2022 4Runner vehicles equipped with 20-inch Black Gunner Wheels. The load carrying capacity modification labels are incorrect. As s

Consequence

An incorrect label may lead to unintentionally overloading the vehicle, increasing the risk of a cra

Remedy

SET will mail replacement labels to owners, free of charge. Owner notification letters are expected

TSB #11028726

OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.

TSB #11028722

Some 2018 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.

TSB #11028712

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

TSB #11020657

The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant

TSB #11019332

To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be u

TSB #11018329

To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be u

TSB #11016786

Some 2018 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. The SST is used with app

TSB #11015500

Some 2018 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software. The SST is used with app

Showing the 8 most recent of 157 technical service bulletins on file with NHTSA.

20211118Component: AIR BAGSCrash reported2 injured

The contact owned a 2020 Toyota 4runner. The contact stated that while the driver who was her father crashed into another vehicle, the air bags failed to deploy. In addition, the contact stated that

20211118Component: FORWARD COLLISION AVOIDANCE: DYNAMIC BRAKE SUPPORT/BRAKE ASSISTCrash reported2 injured

The contact owned a 2020 Toyota 4runner. The contact stated that while the driver who was her father crashed into another vehicle, the air bags failed to deploy. In addition, the contact stated that

20200321Component: AIR BAGSCrash reported2 injured

THE 4RUNNER STRUCK A VEHICLE THAT RAN A RED LIGHT. THE 4RUNNER WAS AT APPROXIMATELY 35 MILES PER HOUR AND STRUCK THE OTHER VEHICLE, A NISSAN ALTIMA SIDE ON WITH ENOUGH FORCE TO PROPEL THAT VEHICLE TW

20200321Component: ELECTRONIC STABILITY CONTROL (ESC)Crash reported2 injured

THE 4RUNNER STRUCK A VEHICLE THAT RAN A RED LIGHT. THE 4RUNNER WAS AT APPROXIMATELY 35 MILES PER HOUR AND STRUCK THE OTHER VEHICLE, A NISSAN ALTIMA SIDE ON WITH ENOUGH FORCE TO PROPEL THAT VEHICLE TW

20200321Component: UNKNOWN OR OTHERCrash reported2 injured

THE 4RUNNER STRUCK A VEHICLE THAT RAN A RED LIGHT. THE 4RUNNER WAS AT APPROXIMATELY 35 MILES PER HOUR AND STRUCK THE OTHER VEHICLE, A NISSAN ALTIMA SIDE ON WITH ENOUGH FORCE TO PROPEL THAT VEHICLE TW

Showing the 5 most serious of 43 complaints filed with NHTSA.

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