2021 Honda Odyssey Reliability Score & Common Problems

Owners of the 2021 Honda Odyssey frequently report issues with the vehicle's Forward Collision Avoidance system, particularly involving unexpected automatic braking when no obstacles are present. Common symptoms include the vehicle abruptly slowing down, often accompanied by a dashboard warning and audible alerts, with some incidents occurring in clear weather conditions and on open roads. Complaints also highlight persistent "Radar Obstructed" warnings following light rain or snowfall, which can disable several driver assist features. One report involves a crash where the automatic braking led to a rear-end collision. These issues are typically reported in regular driving conditions, such as school drop-offs or highway travel, and may pose safety risks due to sudden braking and potential rear-end collisions.

Owners of the 2021 Honda Odyssey frequently report issues with the engine related to the idle stop feature, where the vehicle fails to restart automatically after coming to a stop. Symptoms include the engine shutting off completely and requiring a manual restart, often without prior warning or error messages. These incidents typically occur during stop-and-go traffic or when the idle auto-off feature engages at stoplights. Some complaints note that these issues persist even after following manufacturer recommendations, such as software updates and battery replacements. The problems often arise in cold weather conditions and have been reported over multiple years, suggesting a recurring issue. Safety implications include the potential for unexpected loss of power, which can be hazardous in traffic situations.

Owners of the 2021 Honda Odyssey report issues related to the power train, with symptoms including unexpected shifts into neutral while driving, delays in acceleration from a stop, and inability to shift from neutral to drive. These issues often occur after electrical anomalies such as the radio turning off or warning lights flashing. Complaints frequently describe these problems arising intermittently, typically after a few months of ownership, and sometimes around 14,000 miles. Safety implications are significant, as the sudden loss of power or unexpected neutral shifts can lead to potential accidents, especially in traffic or on highways. Buyers should be aware of these reported issues, as they may affect vehicle performance and safety.

Owners of the 2021 Honda Odyssey commonly report issues with the suspension, particularly involving rear coil springs breaking and causing loud popping noises and shuddering, even at low speeds. Complaints frequently mention these failures occurring around 55,000 to 57,000 miles, with some owners unable to obtain replacement parts due to backorders, leading to prolonged periods of driving with compromised suspension. Additionally, there are reports of uneven tire wear, specifically the inside shoulder of all four tires becoming bald while the rest of the tread remains intact, which may go unnoticed until a traction event occurs. These issues have significant safety implications, as they can lead to a loss of vehicle control and require immediate attention to ensure safe operation.

Owners report persistent issues with the rear view mirror in the 2021 Honda Odyssey, with multiple complaints describing the mirror detaching from the windshield, which impairs visibility and poses a safety risk. Symptoms frequently mentioned include the mirror falling off and becoming unadjustable, inhibiting the driver's ability to view traffic behind the vehicle. One complaint specifically notes a crash resulting from this defect, indicating a potential safety hazard. Another issue involves the driver side mirror replacement, where owners describe distorted images that hinder safe lane changes and merging. These problems are reported despite repeated service attempts to resolve them, suggesting a recurring pattern that may affect vehicle safety.

Owners of the 2021 Honda Odyssey report issues with the vehicle's power tailgate and sliding doors, often linked to water damage and unexpected door operation. A common failure involves the tailgate control module becoming inoperable due to water intrusion, causing the tailgate and sliding doors to malfunction and remain unlocked, posing a safety risk. Symptoms include the inability to latch the tailgate and warnings like “power tailgate problem.” Additionally, incidents involving the sliding doors have led to injuries, such as a child’s finger being cut and a passenger being injured by a door unexpectedly hitting them. These complaints suggest potential safety implications, particularly concerning electrical system failures and door operation, though specific mileage details are not consistently reported.

Owners of the 2021 Honda Odyssey report issues with the lane departure system, particularly in situations involving pedestrians or construction zones. Complaints frequently mention the system steering the vehicle towards hazards, such as a pedestrian on the highway shoulder or Jersey barriers in construction areas, despite driver input to avoid these obstacles. The system's interference occurs suddenly, sometimes within seconds, and can trigger automatic braking, which poses a risk of collision in traffic. One owner notes that using the turn signal can temporarily disable the lane-keeping feature, while another mentions disabling the system entirely to avoid these issues. These reports highlight potential safety implications, such as unintentional steering and braking, which are particularly concerning at highway speeds.