2025 Tesla Model Y: false forward collision warnings

Filed Sep 22, 2026 · Driver assistance, Electrical · CA

The vehicle has suffered recurring, critical electronic and low-voltage safety system failures that first began under the original factory warranty and have now resulted in a complete central computer (HW4) failure. History of Defect: 1. Feb 2025 (~7,170 miles): Initial failure of the 16V low-voltage network and safety systems. Tesla replaced the VCFRONT body controller and low-voltage battery under warranty. 2. May 2025 (~14,543 miles): Safety equipment failures required replacement of the cabin radar and seat belt buckles under warranty. 3. Sept 2026 (~80,000 miles): Total Hardware 4 (HW4) central computer failure. This resulted in the complete loss of all Active Safety Systems, Forward Collision Warning, Automatic Emergency Braking, Autopilot, backup cameras, and power management features. Safety Risk: The complete failure of the HW4 computer completely disables essential safety functions required for safe vehicle operation on public highways. Tesla has denied warranty coverage for the HW4 replacement despite the issue originating from early low-voltage controller failures during the bumper-to-bumper warranty period. ADDITIONAL CRITICAL SAFETY INCIDENT: During the computer/system failure, I experienced a power steering malfunction accompanied by an on-screen warning. The steering wheel became extremely hard to turn/stiff, making it nearly impossible to steer the vehicle safely.

Filed Nov 21, 2025 · Brakes, Driver assistance · FL · crash

My vehicle experienced multiple safety system malfunctions before a minor collision occurred. While driving, the car displayed warnings indicating that traction control had been disabled, followed immediately by a warning that the automatic vehicle hold/brake hold was disabled. These failures happened before any impact. At the same time, the vehicle’s cameras were not functioning correctly, and the vehicle did not provide any forward collision warning. The automatic emergency braking system also did not activate. Because these systems failed, the vehicle did not warn, slow down, or brake to avoid a collision. After the collision, the vehicle showed several additional safety system failures. These included automatic emergency braking unavailable, and repeated safety restraint system faults affecting both the front left and front right restraint systems. The airbags did not deploy even though conditions suggested they should have, and afterwards the vehicle displayed persistent airbag and seatbelt system error icons. The restraint system appears to have gone offline. The vehicle is currently unsafe to drive due to failures in braking, traction control, perception/camera systems, forward collision warning, automatic emergency braking, and the airbag/restraint systems. These failures occurred before the collision, contributed to the collision, and continued afterward. The manufacturer’s service center has declined to provide towing or a loaner or rental vehicle while the safety defects are being investigated, which will take about 30 days.

Filed Nov 11, 2025 · Brakes, Driver assistance · FL · crash

On November 10, 2025 while my 2025 Tesla Model Y was being driven, in Miami, Florida, around 2:55–3:05 PM, the brakes failed completely. Despite firm brake pedal pressure, the vehicle did not slow down or stop as expected and continued forward until a collision occurred. The brake pedal felt normal with no loss of resistance, but the car did not decelerate as expected. No forward collision warning (FCW) or automatic emergency braking (AEB) activated prior to impact. There were no audible or visual alerts displayed before or during braking. After the collision, the vehicle’s screen displayed messages stating “Airbags Deployed” and “Automatic Emergency Braking is unavailable. Feature may be restored on next drive.” However, the airbags did not deploy. A burst of white particulate dust, consistent with airbag propellant or deployment powder, was released inside the cabin. None of the vehicle’s cameras recorded the incident; there is no Dashcam or Sentry Mode footage from that time. At the same time, the cell phone, which was actively linked to the vehicle through Bluetooth and the Tesla app, stopped transmitting location data through the Life360 app for a few minutes. This may indicate a coinciding electrical or data interruption affecting both the vehicle and connected devices. This incident placed my families safety and that of others at serious risk. Multiple safety systems appear to have failed simultaneously, including the braking function, forward collision warning, automatic emergency braking, camera recording systems, and airbag deployment.

Filed Sep 15, 2025 · Driver assistance · TX

Vehicle Autopilot settings with default settings, 1) traveling marked highway speed of 75 mph, vehicle detects something in either the lane to the right or left will slam on the brakes possibly causing a rear end collision, 2) traveling at marked highway speed of 75 mph, vehicle detects curve signs either to the right or left will slam on the brakes possibly causing a rear end collision, 3) traveling in town at marked speed of 40 mph, vehicle detects a vehicle turning at a safe distance for the speed either right or left will slam on the brakes possibly causing a rear end collision. Vehicle Autopilot settings: Forward Collision Warning “OFF”, Lane Departure Avoidance “OFF”. Emergency Lane Departure Avoidance “OFF”, Automatic Emergency Braking “OFF”, Obstacle-Aware Acceleration “OFF”, will remain set for the current drive without any of the above safety issues. Next drive the Automatic Emergency Braking “ON” and the above safety issues can happen. Tesla must make immediate software improvements in the Automatic Emergency Braking system and/or allow continual “OFF” setting disabling of the Automatic Emergency Braking system.

Filed Jan 6, 2025 · Driver assistance, Visibility · NJ

Vehicle Information: • Make: Tesla • Model: Model Y • Year: 2025 Description of the Problem: After a software update pushed by Tesla, the AP4 computer in my 2024 Tesla Model Y shorted out, causing a complete failure of all systems controlled by this computer. The following safety-critical and driver-assist features have become non-functional: Cruise Control (adaptive or otherwise) Forward Collision Warning Lane Departure Warning Lane Keeping Assistance Blind Spot Warning Parking Collision Warning Full Self-Driving and Auto Park features Cameras required for Autopilot functionality Additionally, because the GPS system has failed, the vehicle’s Navigation system is inoperable. This impacts Tesla’s unique route planning feature that sets up Supercharger stops during long journeys. Without a functioning navigation system, I cannot properly plan my travel or locate charging stations, which severely affects the usability of the vehicle. Safety Concerns: The failure of these systems, especially safety features like forward collision warning, lane keeping assistance, and blind spot monitoring, puts both the driver and others on the road at risk. Losing access to safety-critical functions after an update is unacceptable and poses a serious danger to vehicle occupants and surrounding traffic. Incident Details: • The issue occurred immediately following a software update. • Tesla pushed the update remotely without providing any warning or indication of potential risks. • The failure appears to be related to a hardware short in the AP4 computer, directly caused or exacerbated by the update. Desired Outcome: • A thorough investigation into Tesla’s software update process and its effect on vehicle hardware and safety systems. • A resolution that prevents similar failures in other vehicles and ensures system updates do not compromise vehicle safety or critical functionality.

Filed Jan 6, 2025 · Acceleration, Driver assistance · CO

2025 Tesla model Y cameras and sensors all stopped working within 700 miles driven from brand new. Affected systems included all cameras, including backup camera, as well as GPS navigation, with the GPS system believing the vehicle to be static at a Tesla facility in California. This not only prevented the self-driving and navigation from functioning, it caused numerous safety features to be disabled including (mandatory) backup cameras, collision-avoidance system, lane-departure warning system, cross-traffic alert system, rear collision avoidance system, and automatic safety braking. Upon reporting to Tesla, was told a "new component" was required, which later was told was a new computer. The manufacturer initially set a date 2 weeks in the future for a repair; then they pushed it a month; then tried to push it another month before I pushed back. This resulted in it being taken in earlier than the repair date. The vehicle is still awaiting repair. There were no warnings of this failure, it simply all happened at once. Upon confronting Tesla service with this being a known issue [XXX] ) and requesting a loaner for the meantime, they eventually found one, but only after great protestation and pushback, with eventual threats of legal action leading to a more personal touch. This is clearly a known issue which they are downplaying. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 19, 2024 · Driver assistance · VA

The automatic pilot computer (AP4) failed on my 2025 Tesla Model Y after approximately 400 miles. This controls a lot of the vehicle's auto pilot features but it also controls a lot of its safety features, such as the back-up camera, forward collision warning and blind spot warning. As of 19 December, the Tesla Service Center has had my vehicle for 14 days with no fix for the foreseeable future.

Filed Dec 18, 2024 · Driver assistance · NJ

Here is my draft: Vehicle Information: • Make: Tesla • Model: Model Y • Year: 2025 Description of the Problem: After a software update pushed by Tesla, the AP4 computer in my 2024 Tesla Model Y shorted out, causing a complete failure of all systems controlled by this computer. The following safety-critical and driver-assist features have become non-functional: 1.⁠Cruise Control (adaptive or otherwise) 2.⁠Forward Collision Warning 3.⁠Lane Departure Warning 4.⁠Lane Keeping Assistance 5.⁠Blind Spot Warning 6.⁠Parking Collision Warning 7.⁠Full Self-Driving and Auto Park features 8.⁠Cameras required for Autopilot functionality Additionally, because the GPS system has failed, the vehicle’s Navigation system is inoperable. This impacts Tesla’s unique route planning feature that sets up Supercharger stops during long journeys. Without a functioning navigation system, I cannot properly plan my travel or locate charging stations, which severely affects the usability of the vehicle. Safety Concerns: The failure of these systems, especially safety features like forward collision warning, lane keeping assistance, and blind spot monitoring, puts both the driver and others on the road at risk. Losing access to safety-critical functions after an update is unacceptable and poses a serious danger to vehicle occupants and surrounding traffic. Incident Details: • The issue occurred immediately following a software update. • Tesla pushed the update remotely without providing any warning or indication of potential risks. • The failure appears to be related to a hardware short in the AP4 computer, directly caused or exacerbated by the update. Desired Outcome: • A thorough investigation into Tesla’s software update process and its effect on vehicle hardware and safety systems. • A resolution that prevents similar failures in other vehicles and ensures system updates do not compromise vehicle safety or critical functionality. Quality control for Tesla software updat

Filed Dec 17, 2024 · Driver assistance, Electrical · VA

On or around December 1 2024, the **AP4 computer** in my 2025 Tesla Model Y shorted out, causing a **complete failure** of all systems controlled by this computer. The following safety-critical and driver-assist features have become **non-functional**: 1. **Cruise Control** (adaptive or otherwise) 2. **Forward Collision Warning** 3. **Lane Departure Warning** 4. **Lane Keeping Assistance** 5. **Blind Spot Warning** 6. **Parking Collision Warning** 7. **Full Self-Driving** and **Auto Park** features 8. **Cameras** required for Autopilot functionality Additionally, because the **GPS system has failed**, the vehicle’s **Navigation system** is inoperable. This impacts Tesla’s unique route planning feature that **sets up Supercharger stops** during long journeys. Without a functioning navigation system, I cannot properly plan my travel or locate charging stations, which severely affects the usability of the vehicle. **Safety Concerns:** The failure of these systems, especially safety features like forward collision warning, lane keeping assistance, and blind spot monitoring, puts both the driver and others on the road at risk. Losing access to safety-critical functions after an update is unacceptable and poses a serious danger to vehicle occupants and surrounding traffic. **Incident Details:** • The issue occurred **immediately following a software update**. • Tesla pushed the update **remotely** without providing any warning or indication of potential risks. • The failure appears to be related to a hardware short in the **AP4 computer**, directly caused or exacerbated by the update. **Desired Outcome:** • A thorough investigation into Tesla’s software update process and its effect on vehicle hardware and safety systems. • A resolution that prevents similar failures in other vehicles and ensures system updates do not compromise vehicle safety or critical functionality.

Filed Dec 9, 2024 · Driver assistance · PA

The Automatic Pilot Computer (AP4) failed. This controls a lot of Tesla Model Y's auto pilot features but it also controls a lot of its safety features such as the back up camera, forward collision warning and blind spot warning. Another safety concerns is the GPS navigation is no longer function because of the AP4 failure. Navigation is critical in the Tesla ecosystem in order to navigate the charging infrastructure to maintain a charge during road trips. Tesla has admitted to the issue but has done nothing to fix it. I have attached screen shots of the conversation with their service technicians. There is also a picture of the AP4 short remove and replace task for service.