2023 Toyota Highlander Service and Repair Manual

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Factory-Grade Data

2023 Toyota Highlander 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

  • Hybrid Bronze Edition
  • Hybrid LE
  • Hybrid Limited
  • Hybrid Platinum
  • Hybrid XLE
  • L
  • LE
  • Limited
  • Platinum
  • XLE
  • XSE

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
  • Hybrid & Electric Vehicle Systems
  • Maintenance & Lubrication
  • Specifications
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Diagnostic Trouble Codes
  • Technical Service Bulletins
  • Wiring Diagrams

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Vehicle Safety Data

2023 Toyota Highlander Recalls & Complaints

NHTSA #25V74400030/10/2025Component: BACK OVER PREVENTION:DISPLAY FUNCTION

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2022-2026 Toyota, Lexus, and Subaru Solterra vehicles equipped with a Panoramic View Monitor (PVM) system. Please see the recall

Consequence

A rearview camera that fails to display an image can reduce the driver's view behind the vehicle, in

Remedy

Dealers will update the parking assist software, free of charge. Owner letters were mailed January 2

NHTSA #24V45200018/06/2024Component: TIRES

Southeast Toyota Distributors, LLC (SET) is recalling certain 2021-2024 Highlander vehicles. The 20-inch accessory tires with an insufficient load rating for the vehicle's Gross Axle Weight Rating (G

Consequence

Tires with an insufficient load rating can be overloaded and fail, increasing the risk of a crash.

Remedy

SET will inspect and replace the tires and information placard, as necessary free of charge. Owner

NHTSA #23V48000012/07/2023Component: STEERING:COLUMN

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2023 Corolla, Corolla Cross, Corolla Cross Hybrid, Highlander, Highlander Hybrid, Tacoma, 2023 Lexus RX350, RX350 Hybrid, RX500 H

Consequence

A deactivated driver's air bag that does not deploy as intended increases the risk of injury during

Remedy

Dealers will inspect and replace the spiral cable assembly, if necessary, free of charge. Owner not

NHTSA #25V59500011/09/2025Component: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2023-2024 Toyota Venza, 2023-2025 RAV4 Prime, RAV4, Highlander, GR Corolla, Crown, 2024-2025 Lexus TX, LS, Toyota Tacoma, Grand H

Consequence

An instrument panel display that does not show critical information can increase the risk of a crash

Remedy

Dealers will update the instrument panel software over-the-air (OTA) for non-PHEV vehicles, free of

NHTSA #24V41900006/06/2024Component: TIRES

Gulf States Toyota, Inc. (GST) is recalling certain 2022-2024 model year Highlander L and Highlander LE vehicles equipped with the Blackout Package that includes 20" black alloy wheels and tires. The

Consequence

Tires with an insufficient load rating may be overloaded and fail, increasing the risk of a crash.

Remedy

GST will inspect and replace the tires as necessary, and install a new tire information label as nec

TSB #11031158

Some 2020 2024 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the air conditioner does not cool due to a leak and/or corrosion in the rear underbody air conditioner tube and accessory assembly. The ant

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 #11026318

Some 2020 2023 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the Power Back Door (PBD) will not open or close and/or stops moving while opening or closing. A modified PBD unit assembly is available to

TSB #11026306

A new head unit software update is available for 2022 2025 model year Tundra, and Tundra Hybrid; 2023 2025 model year Corolla Cross, Corolla Cross Hybrid, Highlander, Highlander Hybrid, Mirai, and Sequoia Hybrid vehicles equipped with Toyot

TSB #11024080

Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyotas New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers ownership experience. Toyot

TSB #11024075

A new head unit software update is available for 2023 model year Corolla Cross, Corolla Cross Hybrid, Highlander, Highlander Hybrid, and Mirai vehicles equipped with Toyota Multimedia (earlier than version 2170). This software update includ

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 #11019331

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

Showing the 8 most recent of 129 technical service bulletins on file with NHTSA.

20250106Component: AIR BAGSCrash reported2 injured

Vehicle was hit all the way around and was totalled with 4,000 miles. None of the airbags deployed.

20260422Component: AIR BAGSCrash reported1 injured

The contact owns a 2023 Toyota Highlander. The contact stated that while driving at 60–65 MPH, the contact's vehicle crashed into the passenger's side of an oncoming vehicle. The air bags did not de

20260421Component: AIR BAGSCrash reported1 injured

I was in an accident today in this vehicle . Upon impact, traffic was suddenly stopped on the highway. The air bags didn’t deploy and the automatic emergency breaks didn’t engage. Impact was so ha

20260421Component: FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKINGCrash reported1 injured

I was in an accident today in this vehicle . Upon impact, traffic was suddenly stopped on the highway. The air bags didn’t deploy and the automatic emergency breaks didn’t engage. Impact was so ha

20250720Component: SERVICE BRAKESCrash reported1 injured

I was involved in a vehicle crash on 7-1-25. I had just pulled out of the gas station and was coming up to a stop sign so I was only going about 8mph I put my foot on the brake and nothing happened. I

Showing the 5 most serious of 210 complaints filed with NHTSA.

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