2026 Honda Odyssey problems

ENGINE

Starter Failed

NHTSA complaint #11756852 — an unverified report by a vehicle owner.

ENGINE

2026 Honda Odyssey: Strong Exhaust/Fuel Odor in Cabin Causing Dizziness and Nausea I am submitting this complaint to report a potential safety issue involving a vehicle that is less than one year old. Beginning this past weekend, the vehicle suddenly began filling the passenger cabin with a strong exhaust-like odor during normal operation. The odor is severe enough that multiple occupants have experienced symptoms such as dizziness and nausea after spending approximately 10 minutes inside the vehicle. I visited my local Honda dealership to report the issue and seek assistance. According to the representatives I spoke with, Honda believes this is a known and widespread issue affecting multiple makes and models and that it is allegedly related to recent changes in gasoline formulation. I was further informed that Honda is aware of the issue, that engineering teams are working on a solution, and that there is currently no corrective action available to consumers. Honda also stated that, despite the odor, the condition does not involve toxic fumes and is only an odor concern. I am not ready to accept that explanation without further investigation. At this time: The condition began suddenly and without warning. The odor is strong and persistent. Occupants have experienced dizziness and nausea while riding in the vehicle. Honda has not identified a repair or mitigation. Honda has indicated that this may be a broader issue rather than an isolated vehicle defect. I am requesting that NHTSA review this matter to determine whether similar complaints have been reported and whether this condition warrants further investigation as a potential safety defect. I have also requested that Honda provide written documentation supporting its statements regarding: The alleged fuel-formulation cause of the issue. The assertion that occupants are not being exposed to harmful fumes. Any technical bulletins, engineering analyses, or communications related to this condition.

NHTSA complaint #11754522 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

2026 Honda Odyssey: Strong Exhaust/Fuel Odor in Cabin Causing Dizziness and Nausea I am submitting this complaint to report a potential safety issue involving a vehicle that is less than one year old. Beginning this past weekend, the vehicle suddenly began filling the passenger cabin with a strong exhaust-like odor during normal operation. The odor is severe enough that multiple occupants have experienced symptoms such as dizziness and nausea after spending approximately 10 minutes inside the vehicle. I visited my local Honda dealership to report the issue and seek assistance. According to the representatives I spoke with, Honda believes this is a known and widespread issue affecting multiple makes and models and that it is allegedly related to recent changes in gasoline formulation. I was further informed that Honda is aware of the issue, that engineering teams are working on a solution, and that there is currently no corrective action available to consumers. Honda also stated that, despite the odor, the condition does not involve toxic fumes and is only an odor concern. I am not ready to accept that explanation without further investigation. At this time: The condition began suddenly and without warning. The odor is strong and persistent. Occupants have experienced dizziness and nausea while riding in the vehicle. Honda has not identified a repair or mitigation. Honda has indicated that this may be a broader issue rather than an isolated vehicle defect. I am requesting that NHTSA review this matter to determine whether similar complaints have been reported and whether this condition warrants further investigation as a potential safety defect. I have also requested that Honda provide written documentation supporting its statements regarding: The alleged fuel-formulation cause of the issue. The assertion that occupants are not being exposed to harmful fumes. Any technical bulletins, engineering analyses, or communications related to this condition.

NHTSA complaint #11754522 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

Idle stop function error during waiting at red light. Engine failed to restart so i had to turned it off and restarted the engine at the traffic light. Happened twice already. Idle stop system is defective need to be recalled

NHTSA complaint #11753569 — an unverified report by a vehicle owner.

ENGINE

Idle stop function error during waiting at red light. Engine failed to restart so i had to turned it off and restarted the engine at the traffic light. Happened twice already. Idle stop system is defective need to be recalled

NHTSA complaint #11753569 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

When I stopped at a stoplight at a busy intersection during rush hour traffic my auto shut off engaged like it was supposed to. When I released my foot off the brake for the car to restart so I could drive the car's dash started flashing and displaying instructions to engage the brake and put the car into drive, except I was in drive. It would not restart and no matter how many times I pressed the brake and the drive button nothing changed and it kept flashing the same message at me. I attempted to the the car off and when I tried to restart it, it flashed the battery light and would not restart. All electrical systems would turn on, but the car would not restart. It took a solid 5 minutes and turning the car off and on for it to finally restart. Then subsequent times at following lights before I turn the auto shut off off it would restart but struggled to. I have taken it to the dealership and called Honda Corporate and both tell me it is not throwing a code and therefore nothing is wrong with it.

NHTSA complaint #11752324 — an unverified report by a vehicle owner.

VISIBILITY/WIPER

Driving in city limits without any other vehicles nearby, the sunroof “exploded”. After immediately pulling over and inspecting the sun roof from outside the glass was buckled up, away from the interior of the car. The glass then all fell to the interior door.

NHTSA complaint #11751853 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Intermittent Auto Start/Stop failure: When stopped at a red light or stop sign, the car sometimes completely dies. Fails to restart: Releasing the brake pedal does not automatically restart the engine. Manual restart required: I have to manually restart the vehicle and shift back into Drive to proceed. Traffic concern: This process takes 10 to 15 seconds, holding up the traffic behind me.

NHTSA complaint #11750877 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

I own a 2026 Honda Odyssey Elite. On multiple occasions, the Auto Idle Stop system shut the engine off while stopped at a traffic light. When I released the brake pedal to proceed, the engine failed to restart, leaving the vehicle disabled in traffic. I was forced to shift the vehicle into Park and manually restart the engine using the Start/Stop button. This defect has occurred multiple times. I first reported the issue to my Honda dealership on June 2, 2026. After two visits where the dealer was unable to duplicate the concern, I captured the failure on video. During my third repair visit, the dealership's engineer personally experienced the failure twice while testing the vehicle. Honda Customer Relations opened a case and worked with the dealership. The dealership ultimately replaced the battery but advised me that this was only the next diagnostic step and not a confirmed root cause of the failure. This defect creates a significant safety hazard because the vehicle can become immobilized in an active traffic lane after the light turns green, exposing occupants to the risk of being struck by other vehicles.

NHTSA complaint #11750598 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

Rear windshield with possible spontaneous shatter first noticed at noon today. No signs of impact or vandalism. Car last driven 2 days prior and appeared normal last night. Vertical line fractures at the very edge of the glass on both sides concerning for manufacturing defect. Police report filed, no repairs made yet.

NHTSA complaint #11750603 — an unverified report by a vehicle owner.

UNKNOWN OR OTHER

I own a 2026 Honda Odyssey Elite equipped with the factory rear entertainment system and Apple CarPlay. When using Apple CarPlay navigation (Apple Maps, Google Maps, or Waze) while passengers are watching a movie on the factory rear entertainment system, every navigation voice prompt causes the movie playback to stop. After playback stops, the movie cannot be restarted from the vehicle controls. The only way to restore normal operation is to stop the vehicle, turn the vehicle completely off, restart it, reconnect Apple CarPlay, and restart the movie. However, the problem repeats the next time a navigation instruction is given. This creates a driver distraction because passengers immediately ask for the movie to be restarted, and the driver is presented with an infotainment system that does not respond as expected while the vehicle is moving. Drivers may attempt to troubleshoot or repeatedly interact with the infotainment controls instead of focusing on driving. My Honda dealership advised me they were able to reproduce this issue on multiple new 2026 Honda Odyssey vehicles on their lot, indicating that this is not unique to my vehicle. Honda Customer Relations has also been notified.

NHTSA complaint #11750605 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

I own a 2026 Honda Odyssey Elite. On multiple occasions, the Auto Idle Stop system shut the engine off while stopped at a traffic light. When I released the brake pedal to proceed, the engine failed to restart, leaving the vehicle disabled in traffic. I was forced to shift the vehicle into Park and manually restart the engine using the Start/Stop button. This defect has occurred multiple times. I first reported the issue to my Honda dealership on June 2, 2026. After two visits where the dealer was unable to duplicate the concern, I captured the failure on video. During my third repair visit, the dealership's engineer personally experienced the failure twice while testing the vehicle. Honda Customer Relations opened a case and worked with the dealership. The dealership ultimately replaced the battery but advised me that this was only the next diagnostic step and not a confirmed root cause of the failure. This defect creates a significant safety hazard because the vehicle can become immobilized in an active traffic lane after the light turns green, exposing occupants to the risk of being struck by other vehicles.

NHTSA complaint #11750598 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

I own a 2026 Honda Odyssey Elite equipped with the factory rear entertainment system and Apple CarPlay. When using Apple CarPlay navigation (Apple Maps, Google Maps, or Waze) while passengers are watching a movie on the factory rear entertainment system, every navigation voice prompt causes the movie playback to stop. After playback stops, the movie cannot be restarted from the vehicle controls. The only way to restore normal operation is to stop the vehicle, turn the vehicle completely off, restart it, reconnect Apple CarPlay, and restart the movie. However, the problem repeats the next time a navigation instruction is given. This creates a driver distraction because passengers immediately ask for the movie to be restarted, and the driver is presented with an infotainment system that does not respond as expected while the vehicle is moving. Drivers may attempt to troubleshoot or repeatedly interact with the infotainment controls instead of focusing on driving. My Honda dealership advised me they were able to reproduce this issue on multiple new 2026 Honda Odyssey vehicles on their lot, indicating that this is not unique to my vehicle. Honda Customer Relations has also been notified.

NHTSA complaint #11750605 — an unverified report by a vehicle owner.

ENGINE

I own a 2026 Honda Odyssey Elite. On multiple occasions, the Auto Idle Stop system shut the engine off while stopped at a traffic light. When I released the brake pedal to proceed, the engine failed to restart, leaving the vehicle disabled in traffic. I was forced to shift the vehicle into Park and manually restart the engine using the Start/Stop button. This defect has occurred multiple times. I first reported the issue to my Honda dealership on June 2, 2026. After two visits where the dealer was unable to duplicate the concern, I captured the failure on video. During my third repair visit, the dealership's engineer personally experienced the failure twice while testing the vehicle. Honda Customer Relations opened a case and worked with the dealership. The dealership ultimately replaced the battery but advised me that this was only the next diagnostic step and not a confirmed root cause of the failure. This defect creates a significant safety hazard because the vehicle can become immobilized in an active traffic lane after the light turns green, exposing occupants to the risk of being struck by other vehicles.

NHTSA complaint #11750598 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: WARNINGS

I own a 2026 Honda Odyssey Elite. The vehicle has unexpectedly applied the brakes while driving even though there was no vehicle, pedestrian, or obstacle in front of me. The braking event occurred without warning and without any legitimate reason for the Forward Collision Avoidance system to activate. I first reported this issue to my Honda dealership on June 2, 2026 and again during subsequent repair visits. Although the dealership was initially unable to duplicate the concern, the issue remains unresolved. Unexpected braking at highway speeds creates a serious safety hazard because it increases the risk of a rear end collision and could cause other drivers to take evasive action.

NHTSA complaint #11750594 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

I own a 2026 Honda Odyssey Elite. The vehicle has unexpectedly applied the brakes while driving even though there was no vehicle, pedestrian, or obstacle in front of me. The braking event occurred without warning and without any legitimate reason for the Forward Collision Avoidance system to activate. I first reported this issue to my Honda dealership on June 2, 2026 and again during subsequent repair visits. Although the dealership was initially unable to duplicate the concern, the issue remains unresolved. Unexpected braking at highway speeds creates a serious safety hazard because it increases the risk of a rear end collision and could cause other drivers to take evasive action.

NHTSA complaint #11750594 — an unverified report by a vehicle owner.

SERVICE BRAKES

When i was driving, going about 45 MPH, the emergency braking system beeped and breaks were engaged. Not to a complete stop but like a "break tap". Nothing was in front of beside our behind me. It was terrifying and I'm unsure why this happened. Please be advised, this can cause an accident.

NHTSA complaint #11749390 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: WARNINGS

When i was driving, going about 45 MPH, the emergency braking system beeped and breaks were engaged. Not to a complete stop but like a "break tap". Nothing was in front of beside our behind me. It was terrifying and I'm unsure why this happened. Please be advised, this can cause an accident.

NHTSA complaint #11749390 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

When i was driving, going about 45 MPH, the emergency braking system beeped and breaks were engaged. Not to a complete stop but like a "break tap". Nothing was in front of beside our behind me. It was terrifying and I'm unsure why this happened. Please be advised, this can cause an accident.

NHTSA complaint #11749390 — an unverified report by a vehicle owner.

ENGINE

The Auto Idle/stop caused my engine to stall not once but twice in the past few weeks while on a major highway. Light turns green and my car won't start back up. I have to let the car sit for a second then restart the car while traffic is flying past me on this highway. Absolutely ridiculous that my brand new car is having these issues and that I am unable to turn this feature off permanently.

NHTSA complaint #11744414 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

This is a report on a design flaw- not a failed component- in the 2026 Honda Odyssey's "smart" computer automated safety features, including automatic braking, lane departure, and forward collision warning systems. There have been two types of incidents. These incidents have been repeated on this vehicle dozens of times in our first year of ownership. These incidents are potentially very dangerous because they involve erroneous automatic braking at interstate highway speeds. Unexpected erroneous braking at interstate speeds is a good way to cause a rear-end collision or loss of control. 1. Automatic emergency braking due to erroneous lane departure detection. On interstates in Arizona at highway speeds of 65 MPH, the vehicle's lane departure detection system throws erroneous warnings when it sees non-lane markings on the roadway, such as tar sealant strips or seams between pavement sections. This has resulted more than once in the vehicle erroneously applying emergency automated braking to slow the vehicle. This happens even when lane assist and adaptive cruise control are turned off by the driver. 2. Erroneous automated braking while overtaking another vehicle. On interstates in Arizona at highway speeds of 65 MPH, while passing in the left lane a vehicle that is moving much slower in the right lane (e.g. semi truck climbing a hill at 40 MPH), while using adaptive cruise control, automated braking is applied erroneously when there is no risk of a forward collision. The automated braking tends to kick in far earlier than a human driver would brake, and when there is no vehicle in the lane ahead, so it is unexpected and dangerous. This only happens while adaptive cruise control is activated by the driver.

NHTSA complaint #11743726 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

This is a report on a design flaw- not a failed component- in the 2026 Honda Odyssey's "smart" computer automated safety features, including automatic braking, lane departure, and forward collision warning systems. There have been two types of incidents. These incidents have been repeated on this vehicle dozens of times in our first year of ownership. These incidents are potentially very dangerous because they involve erroneous automatic braking at interstate highway speeds. Unexpected erroneous braking at interstate speeds is a good way to cause a rear-end collision or loss of control. 1. Automatic emergency braking due to erroneous lane departure detection. On interstates in Arizona at highway speeds of 65 MPH, the vehicle's lane departure detection system throws erroneous warnings when it sees non-lane markings on the roadway, such as tar sealant strips or seams between pavement sections. This has resulted more than once in the vehicle erroneously applying emergency automated braking to slow the vehicle. This happens even when lane assist and adaptive cruise control are turned off by the driver. 2. Erroneous automated braking while overtaking another vehicle. On interstates in Arizona at highway speeds of 65 MPH, while passing in the left lane a vehicle that is moving much slower in the right lane (e.g. semi truck climbing a hill at 40 MPH), while using adaptive cruise control, automated braking is applied erroneously when there is no risk of a forward collision. The automated braking tends to kick in far earlier than a human driver would brake, and when there is no vehicle in the lane ahead, so it is unexpected and dangerous. This only happens while adaptive cruise control is activated by the driver.

NHTSA complaint #11743726 — an unverified report by a vehicle owner.

LANE DEPARTURE: WARNING

This is a report on a design flaw- not a failed component- in the 2026 Honda Odyssey's "smart" computer automated safety features, including automatic braking, lane departure, and forward collision warning systems. There have been two types of incidents. These incidents have been repeated on this vehicle dozens of times in our first year of ownership. These incidents are potentially very dangerous because they involve erroneous automatic braking at interstate highway speeds. Unexpected erroneous braking at interstate speeds is a good way to cause a rear-end collision or loss of control. 1. Automatic emergency braking due to erroneous lane departure detection. On interstates in Arizona at highway speeds of 65 MPH, the vehicle's lane departure detection system throws erroneous warnings when it sees non-lane markings on the roadway, such as tar sealant strips or seams between pavement sections. This has resulted more than once in the vehicle erroneously applying emergency automated braking to slow the vehicle. This happens even when lane assist and adaptive cruise control are turned off by the driver. 2. Erroneous automated braking while overtaking another vehicle. On interstates in Arizona at highway speeds of 65 MPH, while passing in the left lane a vehicle that is moving much slower in the right lane (e.g. semi truck climbing a hill at 40 MPH), while using adaptive cruise control, automated braking is applied erroneously when there is no risk of a forward collision. The automated braking tends to kick in far earlier than a human driver would brake, and when there is no vehicle in the lane ahead, so it is unexpected and dangerous. This only happens while adaptive cruise control is activated by the driver.

NHTSA complaint #11743726 — an unverified report by a vehicle owner.

ELECTRICAL SYSTEM

My 2026 Honda Odyssey was stopped at a traffic light with Auto Idle Stop engaged. When traffic was ready to move, the engine appeared to restart for about half a second and then shut down. The vehicle then shifted itself into Park and would not resume normal operation. The battery warning light was illuminated. Pressing the engine Start/Stop button caused all of the screens/displays to turn off briefly, but they came back on in the same failed state. The vehicle was disabled in traffic at an intersection. The component or system that failed appears to be the Auto Idle Stop / engine restart system, possibly involving the starter, starter relay, battery/charging system, or engine control software. The vehicle is available for inspection upon request. My safety and the safety of others were put at risk because the vehicle unexpectedly failed to restart and became disabled while stopped at a traffic light, creating a traffic obstruction and risk of being struck from behind or causing other drivers to maneuver around the vehicle. The problem has not yet been reproduced or confirmed by a dealer or independent service center. UNKNOWN whether diagnostic trouble codes were stored. The vehicle/component has not yet been inspected by the manufacturer, police, insurance representatives, or others. There were no warning lamps, messages, or symptoms prior to the failure that I noticed. The battery warning light appeared after the engine shut down and the vehicle would not restart normally.

NHTSA complaint #11743032 — an unverified report by a vehicle owner.