2021 Honda Odyssey Service and Repair Manual

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Factory-Grade Data

2021 Honda Odyssey 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 and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • LX Mini Passenger Van 4-Door
  • EX-L Mini Passenger Van 4-Door
  • Elite Mini Passenger Van 4-Door
  • Touring Mini Passenger Van 4-Door
  • EX Mini Passenger Van 4-Door

Engines covered

  • 3.5L 3471CC V6 GAS SOHC Naturally Aspirated

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
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2021 Honda Odyssey Recalls & Complaints

NHTSA #23V85800018/12/2023Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX,

Consequence

Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

Remedy

Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2

NHTSA #25V87700017/12/2025Component: EQUIPMENT ADAPTIVE/MOBILITY:WHEELCHAIR RESTRAINTS/SECUREMENT:LATCH/ANC

Vantage Mobility, LLC (VM) is recalling certain 2021-2026 Honda Odyssey, 2021-2025 Chrysler Pacifica, and Toyota Sienna vehicles equipped with QRT-Deluxe and QRT-Max wheelchair restraints. The retract

Consequence

An unsecured wheelchair can move during transit, increasing the risk of injury.

Remedy

Dealers will inspect and replace the retractors, free of charge. Owner notification letters was mail

NHTSA #23V17400016/03/2023Component: VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR

Honda (American Honda Motor Co) is recalling certain 2020-2021 Pilot and Ridgeline, and 2020-2022 Passport and Odyssey vehicles. The heating pads behind both side-view mirrors may not be bonded prope

Consequence

Detached mirror glass can reduce driver visibility, increasing the risk of a crash.

Remedy

Dealers will replace both left and right side-view mirrors, free of charge. Owner letters were mail

NHTSA #23V43100015/06/2023Component: BACK OVER PREVENTION:DISPLAY FUNCTION

Honda (American Honda Motor Co.) is recalling certain 2018-2023 Odyssey, 2019-2022 Pilot, and 2019-2023 Passport vehicles. Due to a faulty Media Oriented Systems Transport (MOST) communication coaxia

Consequence

A rearview camera that does not display an image can reduce the driver's rear view, increasing the r

Remedy

Dealers will replace the MOST cable harness and install a straightening cover over the vehicle cable

NHTSA #21V01000014/01/2021Component: FUEL SYSTEM, GASOLINE:STORAGE

Braun Corporation (Braun) is recalling certain 2018-2021 Braun-modified Honda Odyssey vehicles. The fuel tank assembly installed by Braun may be susceptible to the fuel tank overfilling into the char

Consequence

A fuel leak in the presence of an ignition source may increase the risk of fire.

Remedy

Braun will notify owners, and dealers will inspect vehicles. If evidence of a fuel leak is present,

NHTSA #26V22700009/04/2026Component: AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE:SOFTWARE

Honda (American Honda Motor Co.) is recalling certain 2018-2022 Odyssey vehicles. A software programming error can cause the side and side curtain air bags to deploy unexpectedly.

Consequence

Air bags that deploy unexpectedly can increase the risk of injury.

Remedy

Dealers will reprogram the supplemental restraint system (SRS) electronic control unit (ECU) softwar

NHTSA #24V06400001/02/2024Component: AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER

Honda (American Honda Motor Co.) is recalling certain 2020-2022 Pilot, Accord, Civic sedan, HR-V, Odyssey, 2020 Civic coupe, Fit, 2021-2022 Civic hatchback, 2021 Civic Type R, Insight, 2020-2021 CR-V,

Consequence

An air bag that deploys unintentionally during a crash can increase the risk of injury.

Remedy

Dealers will replace the seat weight sensors, free of charge. Owner notification letters were maile

TSB #11015008

Owner Notification Letter - Under certain circumstances, after coming to a stop and the idle stop feature engaging, your vehicle may not automatically restart.

TSB #11013753

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the power sliding door not opening or closing under its own power. To better understand the cause of this conditi

TSB #11013125

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the power sliding door not opening or closing under its own power. To better understand the cause of this conditi

TSB #11013103

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the power sliding door not opening or closing under its own power. To better understand the cause of this conditi

TSB #11011789

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the power sliding door not opening or closing under its own power. To better understand the cause of this conditi

TSB #11010554

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the power sliding door not opening or closing under its own power. To better understand the cause of this conditi

TSB #11010121

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the power sliding door not opening or closing under its own power. To better understand the cause of this conditi

TSB #11009179

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2022 Odysseys with a customer complaint of the power sliding door not opening or closing under its own power. To better understand the cause of this conditi

Showing the 8 most recent of 152 technical service bulletins on file with NHTSA.

20231127Component: VISIBILITY/WIPERCrash reported

Rear view mirror on the windshield has a factory defect. It falls off and causes hazardous conditions. I backed into a parked and unoccupied vehicle. It was dark, the warning beeper did not sound un

20231127Component: LANE DEPARTURE: BLIND SPOT DETECTIONCrash reported

Rear view mirror on the windshield has a factory defect. It falls off and causes hazardous conditions. I backed into a parked and unoccupied vehicle. It was dark, the warning beeper did not sound un

20230621Component: FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKINGCrash reported

I was driving through an intersection. My automatic brakes activated for no reason, my car rapidly slowed down in the middle of an intersection, a bus hit my car from behind.

20260424Component: EXTERIOR LIGHTINGFire reported

Power tailgate problems caused by water leaking through body seams. A visible gap in the rear hatch allows water to flow into the vehicle and shorts out control module. This has ruined my control modu

20260424Component: STRUCTURE:BODYFire reported

Power tailgate problems caused by water leaking through body seams. A visible gap in the rear hatch allows water to flow into the vehicle and shorts out control module. This has ruined my control modu

Showing the 5 most serious of 181 complaints filed with NHTSA.

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