Honda · Known Issues
2021 Honda Odyssey Problems: 9 Known Issues
2021 model year · 17,366+ owner reports · Updated September 2026
2021 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2021 model year · 17,366+ owner reports · Updated September 2026
2021 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's analysis of 17,366+ owner reports, the 2021 Honda Odyssey has 9 documented known issues, with 2 rated critical. The most serious are Backup Camera / MOST Communication Failure and Auto Idle Stop Failure to Restart / Unexpected Stalling ($0-$350 repair). The most commonly reported issue is Power Sliding Door Failures and Latch Problems with 5,234 owner reports. Across all issues with published estimates, repair costs range from $150 to $500. DIY maintenance guides at au7o.io.
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 charcoal canister. If the charcoal canister fills with a sufficient amount of fuel, fuel may leak out.
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 properly, allowing the mirror glass to detach. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
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 coaxial cable connector, the rearview camera image may not appear on the display. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
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According to Au7o's analysis of 17,366+ owner reports, the 2021 Honda Odyssey has 9 documented issues. The most frequently reported are: Backup Camera / MOST Communication Failure, Auto Idle Stop Failure to Restart / Unexpected Stalling, Power Sliding Door Failures and Latch Problems. Of these, 2 are rated critical and should be addressed promptly.
The 2021 Honda Odyssey has 9 known issues documented across 17,366+ owner reports. 2 issues are rated critical: Backup Camera / MOST Communication Failure and Auto Idle Stop Failure to Restart / Unexpected Stalling. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Honda Odyssey issues range from $0 to $500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Media Oriented Systems Transport (MOST) coaxial cable connector improperly designed and manufactured, causing deformed terminals and poor/lost connections between audio display unit and vehicle cable connector. When MOST communication lost for 20+ seconds, rearview camera functio… Severity: high.
The Auto Idle Stop (engine stop-start) system can fail to automatically restart the engine after it shuts off at a stop, leaving the van inoperable and immobile in traffic, at intersections, or while turning. NHTSA opened an investigation that was upgraded in March 2025 to cover… Repairs typically run $0-$350. Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
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, CR-V Hybrid, Passport, Ridgeline, Accord Hybrid, 2020 Acura MDX, 2022 Acura MDX, 2020-2022 Acura RDX, and 2020-2021 Acura TLX vehicles. The front passenger seat weight sensor may crack and short circuit, failing to suppress the air bag as intended.
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, RLX, TLX, 2019-2022 Honda Insight, Passport, 2020 Honda CR-V Hybrid, 2018-2019 Honda Clarity PHEV, Fit, and 2015-2020 Honda Accord Hybrid, Pilot, Acura NSX vehicles. The fuel pump inside the fuel tank may fail.
+ 6 more recalls. Check all on NHTSA.gov
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Power sliding doors experience multiple failure modes including failed rear latch assemblies, binding rollers/tracks, seized actuator motors, and faulty door control modules. Rear latch assembly is most common failure point, causing doors not latching when closing, constant beepi… Severity: medium.
Infotainment system experiences black screens, crashes, freezes, and complete failure due to faulty FAKRA connectors in MOST (Media Oriented Systems Transport) communication network. Improperly designed MOST coaxial cable causes deformed terminals and poor/lost connections. If MO… Severity: medium.
Premature engine mount failure caused by vibration from VCM cylinder deactivation (2005-2017), normal wear, and heavy V6 engine. Hydraulic engine mounts develop leaks and lose damping ability. Failed mounts cause excessive engine movement, vibration, clunking noises, and potentia… Severity: medium.
Parasitic battery drain caused by faulty sliding door rear latch modules with malfunctioning microswitches (most common - 0.4 amp draw), stuck A/C compressor clutch relays, faulty door switches, trunk release switches stuck on, and other electrical issues. Normal draw should be 1… Severity: medium.
The gas-charged support struts on the power tailgate lose internal pressure and can no longer hold the gate up. The tailgate then sags partway, fails to stay open, or power-closes under its own weight. Because the power liftgate motor will still open the gate even when the struts… Repairs typically run $150-$450. Severity: medium.
A/C compressor clutch failure is most common issue where electromagnetic clutch coil/stator fails or clutch plate surface becomes contaminated with oil from front seal leaks. Oil leaking past compressor front seal drips onto clutch surface, causing slipping and burning. Compresso… Severity: low.
The HVAC blend/mode door actuators (small geared motors behind the dash and in the rear climate system) strip their internal plastic gears and fail. The classic symptom is a repetitive clicking/ticking noise from behind the dash, often paired with one side blowing hot while the o… Repairs typically run $200-$500. Severity: low.