2022 Tesla Model 3 Electrical System Problems

My 2022 Tesla Model 3 experienced a heat pump compressor failure at approximately 89,457 miles. Tesla Service Center diagnosed an internal failure in the heat pump system. The heat pump system controls cabin heating, windshield defrosting, and thermal management for the vehicle. When the system failed, the vehicle lost heating and proper defrost capability. This can impair windshield visibility during cold or foggy conditions, creating a potential safety hazard while driving. Tesla quoted approximately $3,000 to repair the compressor and declined warranty assistance despite the system being critical to safe vehicle operation.

When cabin heat is enabled, visible vapor/smoke emits from the front trunk area under the windshield cowl and is pulled directly into the cabin through the HVAC intake. The vapor has a chemical/sweet odor consistent with coolant or refrigerant. Smoke enters the passenger compartment, especially when stopped or idling. This occurs repeatedly in cold temperatures and stops immediately when HVAC heat is turned off. No warning lights appear. This appears to be a heat pump or coolant system leak upstream of the cabin intake, allowing chemical fumes to enter the cabin air stream. Occupants are exposed to fumes while driving. This is a safety concern due to inhalation risk and lack of driver warning.

RECURRING 12V LOW-VOLTAGE SYSTEM FAILURE AND DEFECTIVE REAR DEFROSTER HEATER GRID VEHICLE: 2022 Tesla Model 3 (VIN: [XXX] ). ODOMETER: 114,093 miles at time of third service visit. SUMMARY OF DEFECT: Vehicle has experienced recurring low-voltage (12V) system alerts since late December 2025. The 12V battery has been replaced three times by Tesla service. After each replacement, the low-voltage alerts return within days. Tesla's diagnostic system detected a DCR (DC resistance) reading of 16.8 milliohms against a threshold of 16 milliohms, indicating the battery's internal resistance is too high for the vehicle's electrical system to function properly. A brand-new 12V battery showed "Degraded - Replace" status within one week of installation. These low-voltage errors did not exist before Tesla replaced the 12V battery during the first service visit. DIAGNOSTIC FINDINGS: During the third service visit (February 2026), Tesla technician performed a resistance check on the rear defroster heater grid and described it as "out of spec but not significantly." Ground straps were also described as "out of spec but again not significantly." The technician stated there was "no smoking gun yet" and it was "maybe a combination of all leading to the 12V warning." Tesla proposed replacing the rear backlight glass at a cost of 1,265 to the customer. Additionally, severe rodent damage was discovered in the front wiring harness with chewed wires and nesting material. Despite this confirmed damage to the electrical system, the service manager stated the rodent damage was "not associated with the error" while the technician simultaneously stated there was no confirmed root cause. SAFETY CONCERN: The recurring 12V low-voltage condition presents a safety risk. The 12V system powers critical vehicle functions including exterior lighting, hazard lights, door locks, windows, the vehicle's computer systems, and safety features. Repeated system alerts include DIF_a018_hwLVSupplyUV (ha INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving, the center display intermittently goes completely black. When this occurs, I lose access to the speedometer and all driver information. The issue has been ongoing and progressively worsening. The vehicle was purchased new. The issue was reported during the warranty period and initially attributed to software updates. A recent service visit confirmed the vehicle computer is failing, and the issue immediately recurred after pickup. Loss of speed and driver information while driving creates a safety concern.

The vehicle has a manufacturing defect in the charge port body seal allowing water intrusion into the vehicle cabin and near high-voltage charging components. This has resulted in dampness and potential mold growth, posing a respiratory health hazard to occupants.

All safety and driver-assistance systems on my 2022 Tesla Model 3 failed due to an internal short in the vehicle’s computer, as confirmed in writing by Tesla’s technician. All cameras (rear, side, front) are non-functional, navigation does not work, and all ADAS features (Autopilot, lane-keeping, collision warning, blind-spot monitoring, emergency braking, etc.) are disabled. The vehicle has no visibility when reversing and no active safety protections while driving. Tesla documented the cause as an internal computer failure, not related to damage or misuse. This creates a dangerous condition on public roads since the car loses all safety systems. Tesla quoted ~$2,900 for a new computer even though the failure involves critical safety components. This may indicate a broader safety defect.

SAFETY CONCERN: for kids getting trapped in rear doors with no manual release in the rear of my 2022 Tesla model 3. Only the front has a manual release which is not practical for two kids in the back.

Tesla M3 RWD 2022 - 79750k miles. Touchscreen keep restarting throughout the day , in the morning when I am backing out of the garage, while I am driving, while I parked. It is dangerous specially while I am backing out of garage, car will stop sometime, because whole system reboots. I have no visibility I have to wait till its finish restarting. Tesla's main computer handles everything in the car, A/C, Turn signals, speedometer, backup cameras, forward collision warning and many more necessary function of the car. Tesla service center diagnose stats "The cause was identified as kernel panics detected in the system. The internal memory of the car computer is corrupt and will not allow enough data transfer and causing the computer to reboot to clear space" They suggested to replace the computer and its a out of warranty fix, since I drove 79k miles. This is a crucial of the car and it should not fail in 3 years, driving 79k in California is not unusual, Tesla service also blamed that we didn't extended our warranty after 50k. We couldn't find any correspondence from Tesla on service app or email regrading warranty extension. $3000 to replace a computer is a very high price.

pedestrian warning system has failed for a second time. speaker was replaced once already. presents safety issue to pedestrians (this displays an error that it is not working, the error also states that the horn may not work, however this is for newer cars that do not have separate horns and PWS speaker) Horns are intermittent in functionality, sometimes high or low tone only works, other times no horn sounds, this is a separate device from the PWS speaker, there is no error message shown for this when the PWS is functioning as intended

The contact owns a 2022 Tesla Model 3. The contact stated that while the vehicle was in self-driving mode, the vehicle was supposed to merge into the right lane, however the vehicle accelerated into the left lane, and another vehicle collided into the front driver side of the vehicle. The contact stated that he did not sustain any injuries, however the passenger stated he sustained injuries, but the injuries were unknown. No medical attention was required. The contact stated that a police report was filed. The vehicle was taken to dealer where it was diagnosed that the software needs to be updated. The vehicle was not repaired. The vehicle was still drivable after the incident. The manufacturer was not notified of the failure. The approximate failure mileage was 104,547.

Rodents Chew on Car Wires Consequences of Rodent Damage: Malfunctioning Components: Chewed wires can lead to a variety of problems, including issues with the engine, lights, sensors, and other electrical components. Expensive Repairs: Repairing or replacing damaged wiring harnesses can be costly, potentially running into the thousands of dollars. Safety Hazards: Damaged wiring can pose safety risks, potentially causing electrical shorts, fires, or malfunctions while driving.

Shortly after purchasing my 2022 Tesla Model 3 RWD in February 2025, I began noticing a persistent musty, mold-like odor coming from the HVAC vents whenever the air conditioning or defrost was on. The odor worsens when driving with the windows down. I reported this issue to Tesla multiple times between May and October 2025. Tesla replaced the cabin filters but refused to perform a full evaporator or HVAC disinfection, stating the odor was “normal.” Despite the filter changes, the smell always returns within a few weeks. Between these visits, I also tried to resolve the issue myself by replacing filters, using odor-eliminating products, and placing moisture absorbers inside the vehicle, but nothing has resolved the problem. This ongoing issue has led to repeated respiratory and eye irritation, including a documented pneumonia case in April 2025. The symptoms clearly worsen after time spent in the car. Tesla has not offered any permanent fix, warranty repair, or replacement. The problem appears to stem from mold or microbial buildup within the HVAC evaporator and duct system, which could affect air quality and occupant health. This raises safety concerns regarding possible HVAC design flaws or moisture retention issues that may affect other Tesla vehicles. The issue is ongoing as of November 2025 and has been reported to the Florida Department of Agriculture and Consumer Services (FDACS Case #2511-00831) for further review.

The contact owned a 2022 Tesla Model 3. The contact stated that while driving at approximately 35 MPH with the full self-driving mode activated and making a right turn off the highway, the vehicle collided with the wall of the exit ramp and spun out. The contact stated that there were no prior alerts and or warnings of the collision. The contact sustained a right shoulder injury. Medical attention was not needed. A police report was not filed. The vehicle was towed to a collision shop where it was deemed totalled. The manufacturer was not notified of the failure. The failure mileage was 27,669.

Our car was parked in our garage for two days before August 25, 2024 not plugged in for charging and was clear of issues. On the morning of August 25, 2024 we woke up to the smell of smoke and evacuated our house as the source was coming from our Tesla in the garage. This incident burned our home and took 6 of our cats with it. We filed with insurance and they are reporting that they are not liable for the accident. They did not bother to show up to the joint investigation and paid the bare minimum for the market price of the vehicle. The company has been slow in responding and has shown zero remorse or care of the matter. Fire department pinned it as a 99.9% probability of cause that the front battery of the Tesla triggered the fire.

My 2022 Tesla model 3 has a major issue that should be widely addressed and because the computer screen has completely turned off although there was never any damage done to the vehicle. The cost to fix this issue is $3,052.30. I went on a three day vacation and came back to the screen not turning on but the vehicle can still drive, the major issue is that the screen controls all major functions of the vehicle and is a major danger driving the car if you cant see how fast your going, how much battery is left or will basic safety equipment will deploy? How can a vehicle be driven under these basic safety standards and conditions when it’s a faulty manufacturing issue. In addition come to find out that the computer tried to update it’s software with out my consent and causing the computer to fail there fore leaving me in danger situation of driving the vehicle under these conditions and then having me to pay the financial repercussions although I caused no damage to the vehicle.

Tesla has confirmed that the firmware of the high-voltage controller of the Model 3 is known to occasionally go "missing in action", causing regenerative braking to entirely cease to function and the driving performance of the car to drop considerably. This was expected to be resolved in a firmware update, but the problem continues. The service representative advised that they (Tesla employees) are not allowed to refer to the problem as a defect and instead must use the euphemism "firmware characteristic". The impact of the issue occurring while driving is that braking and acceleration are significantly reduced, thus reducing the ability of the driver to respond to unexpected situations and operate the vehicle safely. The impact of the issue occurring while parked is that the vehicle cannot start until such time as the controller resumes responding. The driver has no control over when/if this will happen, and the car may ultimately require towing. We encountered the while-parked case on 2024-07-07 and the while-driving case on 2024-07-27.

The contact owns a 2022 Tesla Model 3. The contact stated while operating the vehicle in "Self-Driving" mode, the error message "Camera Malfunction" was displayed. During the failure the vehicle drove through red lights and erroneously steered the vehicle off the road and into the wrong lane. The vehicle was taken to the local dealer who diagnosed that the main computer was faulty and needed to be replaced. The computer was replaced but the failure persisted. No further information was available. The manufacturer was notified of the failure. The failure mileage was 34,000.

Rear view camera display sometimes just a blank screen, other times delayed by 2-15 seconds. Has been in for service 3 times and Tesla Service will either say could not duplicate or acknowledge problem, but not repair. Seems like a widespread Tesla problem, but no resolution as of yet.

the car started to abruptly accelerate when slowing down the car at a stop light and would not brake. the anti collision functions did not work. the car went into a truck.

The contact owned a 2022 Telsa Model 3. The contact stated that while driving at 18 MPH, the vehicle veered to the right hitting an electrical pole. The contact stated neither the autopilot nor cruise control was set to on, and the vehicle failed to stop. The contact stated it happened so fast he was unable to depress the brake pedal in time. No warning lights were illuminated and the air bags in the vehicle failed to deploy. The contact sustained a knee injury and later received medical attention at an urgent care. However, the contact stated he was traumatized from the crash. The vehicle was towed and deemed destroyed. A police report was filed. The contact notified the manufacturer of the failure. The failure mileage was approximately 21,372.