2021 Tesla Model Y Reliability Score & Common Problems

Owners report frequent issues with phantom braking in the 2021 Tesla Model Y, particularly when using adaptive cruise control or Autopilot. Complaints commonly describe the vehicle abruptly braking without any obstruction, often on clear and straight roads, which poses a risk of rear-end collisions. Some incidents involve the vehicle accelerating independently, leading to one reported crash. Many reports indicate these issues occur at highway speeds, often with mileage around 39,000 to 42,000. Additionally, some owners mention problems with brake fluid alerts and damaged brake components, which are addressed through service interventions. These patterns suggest potential safety implications, especially for buyers considering this model.

Owners report frequent issues with the 2021 Tesla Model Y's Full Self Driving (FSD) and autopilot systems, with multiple incidents involving unintended acceleration or failure to recognize obstacles, sometimes leading to crashes. Complaints often describe problems with the vehicle's cameras and sensors, such as glare or failure, which affect visibility and safety features like lane departure warnings. Some owners mention structural issues like control arm detachment and brake line corrosion, which have occurred at various mileages, including vehicles with moderate mileage. Safety implications are evident, with 15 crash reports and two injuries linked to these failures. Used car buyers should be aware of these potential issues and the associated safety risks.

Owners report several steering-related issues with the 2021 Tesla Model Y, with a significant number involving control arms and steering racks. Complaints frequently mention steering wheel lock-ups, often without warning, and reduced steering assist, which can make the vehicle difficult to control. These issues often arise around 28,000 to 96,000 miles, with some owners noting that repairs can be costly. There are reports of crashes, injuries, and even a fire, highlighting potential safety implications. Buyers should be aware of these patterns, especially concerning steering control and the potential need for expensive repairs.

Owners report frequent issues with the suspension of the 2021 Tesla Model Y, particularly involving the front lower lateral and compliance links. Complaints frequently mention loud creaking, groaning, or clicking noises during low-speed maneuvers, with some noting these sounds progress to more severe symptoms like control arm detachment or wheel misalignment. These issues often arise around 22,000 to 53,000 miles, with several owners highlighting that their vehicles were not included in existing recalls despite experiencing similar problems. Safety implications are significant, with reports of crashes and instances where vehicles became undrivable due to suspension failures, although there is no mention of fires directly linked to these issues. Buyers should be aware of the potential for costly repairs and the importance of thorough inspection prior to purchase.

Owners of the 2021 Tesla Model Y frequently report issues with the power train, including sudden loss of drive power and intermittent drive disconnections, which sometimes occur without warning and can pose a safety risk. Common symptoms described by owners include abrupt propulsion after pedal release, unexpected vehicle acceleration, and power reduction alerts, with some incidents resulting in crashes. Complaints also note problems with regenerative braking, particularly in wet conditions, and issues with the drive unit, often at mileage around 15,000 to 30,000 miles. Additionally, there are reports of fires and electronic malfunctions, such as the vehicle rolling backward when stopped, which further highlight potential safety implications for buyers considering this model.

Owners of the 2021 Tesla Model Y frequently report issues with the front passenger safety restraint system, often noting a "Front Passenger Safety Restraint System Fault" message. Complaints commonly describe problems with the occupant classification system, where the sensor fails to detect the presence of an adult passenger, leading to the airbag being intermittently disabled. This issue appears at various mileage points, including as early as vehicle delivery and up to 68,400 miles. Additionally, five complaints involve crashes where airbags did not deploy, indicating potential safety implications. Buyers considering a used Model Y should be aware of these reported airbag and sensor faults, as repairs can be costly and may not be covered under warranty.

Owners report various issues with the lane departure and related systems in the 2021 Tesla Model Y, with several complaints involving crashes. A common issue is the lack of audible alerts for the blind spot warning and rear cross traffic alert systems, which may lead to missed warnings during lane changes. Additionally, multiple owners describe erratic behavior of the autopilot and full self-driving features, including swerving and incorrect lane positioning, sometimes resulting in collisions. Water intrusion in the B pillar cameras and post-windshield replacement camera miscalibration are also noted, affecting the functionality of lane-keeping systems. These issues typically arise soon after updates or modifications, and they highlight potential safety implications, including vehicle control loss and collisions.