2018 Tesla Model 3 Reliability Score & Common Problems

Owners of the 2018 Tesla Model 3 frequently report issues related to software updates and their impact on vehicle functionality, including failures in PTC heating and audio systems. Complaints often describe problems with the horn, which sometimes fails entirely, and rear door manual release mechanisms, posing a safety risk during power loss. Several reports involve the vehicle's autonomous features, such as sudden deceleration on autopilot and crashes during automated driving. Safety implications are noted, with incidents involving crashes and injuries, and two reports of fires. These issues typically emerge after software updates or over time, with some owners mentioning recurring problems despite previous fixes.

Owners of the 2018 Tesla Model 3 frequently report issues with the forward collision avoidance system, particularly related to the Autopilot and Full Self-Driving features. Common symptoms include phantom braking, where the vehicle brakes abruptly without any apparent obstacle, and failure to detect vehicles or obstacles, leading to crashes. Multiple reports involve crashes, with some incidents resulting in injuries, often occurring when the vehicle fails to follow road lines or unexpectedly changes lanes. Complaints often mention these issues at highway speeds and during specific driving conditions like curves or when approaching overpasses. Many reports indicate these problems arise at various mileage points, with some occurring as early as 27,000 miles. Buyers should be aware of the potential for sudden braking and lane-following errors that could impact safety.

Owners report frequent issues with the steering system of the 2018 Tesla Model 3, particularly involving sudden loss of power steering assist and control arm failures. Symptoms typically include difficulty turning the steering wheel, grinding noises, and creaking sounds from the suspension, with some incidents leading to complete steering lock-up. These issues often arise around the 40,000 to 50,000-mile mark. Safety implications are significant, with six complaints involving crashes and one reported injury, highlighting the potential for loss of control. Prospective buyers should be aware of these patterns and the potential for costly repairs if these issues manifest.

Owners of the 2018 Tesla Model 3 frequently report issues with vehicle speed control, particularly involving unexpected and aggressive braking, often referred to as "phantom braking." Complaints describe occurrences both with cruise control and Full Self Driving (FSD) features engaged, where the car brakes suddenly without clear obstacles, sometimes interpreting shadows or road imperfections as hazards. This issue is noted across various speeds and conditions, with some reports involving crashes and injuries. Mileage at which these issues occur varies, but some reports mention incidents occurring as early as 16,600 miles. Safety implications are significant, with multiple reports of crashes and near-misses due to sudden braking, highlighting a potential risk for buyers considering this model.

Owners of the 2018 Tesla Model 3 frequently report issues with the service brakes, particularly involving unexpected braking when using Autopilot or Full Self-Driving features. Complaints often describe the vehicle braking suddenly without visible obstacles, a phenomenon sometimes referred to as "phantom braking." Additionally, several owners mention significant rust and corrosion in brake lines, leading to brake fluid leaks and, in some cases, complete brake failure. These issues are reported across various mileage ranges, with some vehicles experiencing problems as early as 107,000 miles. Safety implications are notable, with seven crashes and two injuries reported in connection to these brake issues. Buyers considering a used 2018 Tesla Model 3 should be aware of these potential braking system concerns.

Owners of the 2018 Tesla Model 3 frequently report issues with door handles, specifically the peeling of chrome plating, which creates sharp edges that can cause injuries. Complaints also commonly describe problems with the rear doors lacking manual release mechanisms, potentially trapping passengers in emergencies. Additionally, several owners report structural issues such as undercarriage components detaching, particularly in wet conditions, and rear bumpers falling off, which may pose safety risks to other road users. These issues are noted at various mileages, with some occurring as early as 30,000 miles. Safety implications are underscored by reports of crashes and injuries related to these structural problems.

Owners report several recurring issues with the 2018 Tesla Model 3's power train. Complaints frequently mention sudden unintended acceleration, with incidents occurring during low-speed maneuvers like parking or while stopped, occasionally leading to crashes. Some owners describe power reduction modes due to battery management system failures, often linked with coolant leaks or PTC heater failures, which can leave the vehicle unresponsive and unable to start. These issues typically arise around the 17,000 to 63,000-mile range. Safety implications are noted, including crashes and one reported fire, underscoring potential risks of loss of control or thermal events. This information is crucial for used car buyers considering the reliability and safety of the vehicle.