2016 Tesla Model S: engine overheating

Filed Oct 31, 2026 · Acceleration, Electrical · CA

1. 2016 Model S suffered a sudden, complete loss of motor power at 70 mph on a high-speed freeway due to internal coolant intrusion, creating a life-threatening emergency requiring a 911 dispatch. - Car went into Limp mode. What happened is a known, well-documented mechanical issue: the internal rotor seals on early-generation Tesla Large Drive Units are prone to failing over time. When this seal fails, pressurized liquid glycol coolant leaks directly into the motor housing. It then submerges the motor encoder (speed sensor) and the electrical wiring harness. This instantly causes a short circuit, throws the car into limp mode to protect the high-voltage system, and effectively leaves you stranded. I was in middle lane, car died, unable to get out of traffic, limped to side divider in center of freeway, called 911. No warning prior to failure, turtle after incident on dash. Unable to get out of car, cars swerving around me at high speed rocking car.- TESLA IS NOT LISTING THIS IN SERVICE ESTIMATE SO HAVE TO GET THEM TO DO IT

Filed May 4, 2026 · Acceleration, Electrical · CA

I own three 2016 Tesla vehicles with the same known safety defect: two Model S P100D and one Model X P100D, all equipped with the Large Drive Unit (LDU). The component that fails is the rotor coolant seal in the rear drive unit motor. Coolant leaks internally into the motor and inverter, causing bearing wear, corrosion, isolation faults, and eventual complete drive unit failure. The affected drive units are still installed and available for inspection upon request. This defect puts my safety and the safety of others at risk because it can cause sudden loss of propulsion (especially at highway speeds), power reduction, or total drivetrain shutdown, potentially leading to a crash. Coolant in high-voltage areas also raises electrical fault/FIRE risks. The problem is widely reproduced and confirmed: Tesla service centers are familiar with it and replace failed units with updated “-U” revisions that include a coolant bypass. Independent EV shops confirm the exact root cause (rotor seal failure) via encoder inspections showing coolant intrusion and through disassembly. This is a documented pattern failure in all 2012–2020 LDU vehicles. No police or insurance inspections have occurred yet, as no crash or total failure has happened. Tesla is aware of the recurring issue through service records on similar vehicles. Early symptoms before full failure typically include rear motor whining/grinding (especially under load), reduced power warnings, “Rear Drive Unit Fault” messages, and visible coolant on the speed sensor. These can appear gradually. My vehicles have not yet experienced total failure, but the defect is known to be inevitable. I am proactively monitoring encoder sensors. Because this is a systemic design defect affecting thousands of vehicles with clear safety implications, I request the federal safety agency open an investigation and require Tesla to issue a recall for free repairs/replacements on all affected 2012–2020 LDU vehicles.

Filed May 4, 2026 · Acceleration, Electrical · CA

I own a 2016 Model S P100D equipped with the Large Drive Unit (LDU). The component that fails is the rotor coolant seal in the rear drive unit motor. Coolant leaks internally into the motor and inverter, causing bearing wear, corrosion, isolation faults, and eventual complete drive unit failure. The affected drive units are still installed and available for inspection upon request. This defect puts my safety and the safety of others at risk because it can cause sudden loss of propulsion (especially at highway speeds), power reduction, or total drivetrain shutdown, potentially leading to a crash. Coolant in high-voltage areas also raises electrical fault/fire risks. The problem is widely reproduced and confirmed: Tesla service centers are familiar with it and replace failed units with updated “-U” revisions that include a coolant bypass. Independent EV shops confirm the exact root cause (rotor seal failure) via encoder inspections showing coolant intrusion and through disassembly. This is a documented pattern failure in all 2012–2020 LDU vehicles. No police or insurance inspections have occurred yet, as no crash or total failure has happened. Tesla is aware of the recurring issue through service records on similar vehicles. Early symptoms before full failure typically include rear motor whining/grinding (especially under load), reduced power warnings, “Rear Drive Unit Fault” messages, and visible coolant on the speed sensor. These can appear gradually. My vehicles have not yet experienced total failure, but the defect is known to be inevitable. I am proactively monitoring encoder sensors. Because this is a systemic design defect affecting thousands of vehicles with clear safety implications, I request the federal safety agency open an investigation and require Tesla to issue a recall for free repairs/replacements on all affected 2012–2020 LDU vehicles.

Filed Feb 26, 2025 · Electrical · CO · fire

Component Failure: The Tesla NEMA 14-50 charging adapter for my 2016 Model S malfunctioned, causing overheating that melted a prong and led to an electrical fire. The defective adapter appears identical to those in Tesla's November 2016 recall, though mine was designated "not affected." The damaged adapter and charging cable are available for inspection. Safety Risk: This malfunction created a serious fire hazard endangering myself and my property. The electrical fire damaged both my vehicle and charging equipment, and the fire could have spread to my home, potentially endangering my family and neighbors. Verification: I took the damaged adapter to the Tesla Service Center in Colorado Springs, where technicians acknowledged the damage but refused to replace it under the recall. They visually confirmed the melted prong and fire damage. Manufacturer Response: After the incident, I contacted Tesla Corporate requesting replacement of the defective equipment. They responded that they don't believe the electrical fire was caused by the defective plug, despite physical evidence showing the same issue as recalled units. Warning Signs: Prior to failure, I noticed intermittent charging interruptions and the adapter becoming unusually hot. These symptoms began approximately three weeks before the fire incident. There were no dashboard warnings about potential charging equipment issues.

Filed Feb 26, 2023 · Lights · NC

Tesla designed a combined headlight with no serviceable parts. This includes headlights, high beams, and namely daytime running lights. All of these components are on an LED strip that apparently has a tendency to overheat and fail prematurely. For example, the replacement cost for a portion of the daytime running light (on one side) is over $1,000. This is apparently a known weak point and should be addressed.

Filed Oct 30, 2022 · Lights · TX

Tesla designs a single piece headlight with no serviceable parts. This includes headlights, high beams, and namely daytime running lights. All of these components are on an LED strip that overheats and un-solders due to this high heat, which causes premature failure. Some owners have reported as little as 3 months of life before failing. The day

Filed Oct 30, 2022 · Lights · CA

Headlight daytime running lights (eyebrows) have experienced a failure. Progressively turning yellow, then eventually failing to light up. Tesla designs a single piece headlight with no serviceable parts. This includes headlights, high beams, and namely daytime running lights. All of these components are on an LED strip that overheats and un-solders due to this high heat, which causes premature failure. Some owners have reported as little as 3 months of life before failing. The daytime running lights are essential for safety. The repair is a big cost to car owners with no recourse to fix the headlights themselves at a fraction of the cost the manufacturer charges to replace at their service center. This is a serious safety issue for drivers.