2018 TESLA MODEL 3 Unknown Or Other Problems

After downloading Tesla’s update (no. 2025.44.25.4) software my heater (with the window defrost functionality) in winter stopped operating. I made my update while at my nearest Tesla service compound (location verifiable per system location log) on 01/25/26 when that same day software began throwing HVAC error codes with blowing cold air, when previously my heat ran well. This is not coincidental; this is system design failure.

I received a safety alert on my car screen: Front passenger safety restraint system issue. Service is required. The front passenger safety restraint system fault typically involves a malfunctioning occupant weight sensor in the passenger seat, which controls whether the airbag activates or deactivates EVGOER. This is a serious safety concern because the airbag may be disabled at that seat location in the event of a crash. The issue is often caused by loose, broken, or unplugged harnesses or connectors under the seat, particularly related to the Occupant Classification System (OCS) Tesla Owners OnlineDigital EV Doctor. Many owners report this happens because wires under the seat get crimped over time due to Tesla's "easy entry" feature that automatically moves seats. Since this a widespread Tesla Model 3 problem, I believe this should be a recall.

The rear doors do not have a manual release. If power is lost, you cannot open the rear doors. This is a severe safety concern. With 2 child seats in the rear seats, with a power failure, you cannot get the children out. Newer Model 3 vehicles, have a manual safety release. My 2018 does not.

The "Front passenger safety restraint system" is prone to errors because the wiring for it beneath the seat is prone to getting knocked loose and electrical interference

No warning messages at all, all cameras/sensors stopped working all at once while driving, full self drive stopped working, lane assist, safety features of full self drive was degraded by this. Car software v12 (2024.44.25.2 288ce84bb43e), according to the dealership the computer fried randomly.

The car's horn only works sometimes and often not at all when steering wheel horn areas are pressed, hard or soft!! Tesla said they couldn't fix it!!

Mold, mildew and smelly odors are coming through the on-cabin ventilation system. This is the 3rd time since 2020, I had to purchase & replace the two air filters and spray the poorly designed duct & condensation accumulation. I inspected the self-installed air filters and there were no signs of moisture, mildew, mold or stains on the filters, which makes me think the problem was /is from the HVAC condenser or coil area. Tesla had issued a 2019 software update to “run” the ventilation system longer after the vehicle was in “Park” but the software update has NOT solved the mildew and bacteria odors that are vented into the cabin, and subsequently changed the HVAC design in post 2021Tesla models that corrected this problem with many pre-2021 Model 3s. Tesla Service Centers are still charging for the coil spray cleaning and not covering this mold & bacteria-creating HVAC design problem...

While driving on the 5 freeway, using autopilot, my car suddenly decelerated and came to a complete stop. Fortunately, we were not struck from behind, and I was able to get the car to accelerate again after approximately 10 seconds.

Front suspension is making very weird and loud noises. Issue is associated with the front suspension links becoming loose.

1. The Power Conversion System (PCS), still in the vehicle and not available for inspection 2. 2 of the 3 controllers have failed, resulting in limited AC charging (16A out of 48A max). The PCS helps regulate AC and DC electricity and connects the 12V batter to the HV battery. If it fails, it could lead to dangerous situations since the electricity from the HV battery wouldn't be as controlled. I'm worried that if the final controller fails while driving it could lead to a loss of power. 3. Problem throws an error code when charging that the dealer has verified, they will not replace it unless I pay for the part+labor which is roughly $1,800. 4. Vehicle inspected by dealer, they will only fix if I pay for replacement part. 5. Car has warning message when charging.

Front suspension lateral link fasteners loosened, allowing the lateral link to separate from the sub-frame. I have a 2018 Model 3 and this seems to be the exact same issue that led to a recent recall with the help of the NHTSA. Recall no. 23V235000 SB-23-31-001 An expansion of previous recall number 21V-835. I noticed for months something was slightly off in the front right area of the car. I brought it into the Tesla service center, they drove it and didn't notice anything. About a month later the lateral link separated from the subframe rendering the car undriveable. I had it towed immediately.

I’m not exactly sure what’s wrong, the screen keeps failing on my car. It’s been taken to Tesla to service this issue 4 times. With the most expensive repair costing $2,200. Its poses a safety hazard because when the screen fails. You can’t see anything, speed, gear. You can’t adjust windshield wipers, seat or mirror positions.

AC Power Control System Failure - I didn't know about this problem until two weeks ago I went to Tesla service center. I was facing this problem since 2020, when car was under 4 years warranty but never complain thought home power source charge that much only.

ISSUE: PTC Heater failed at 63,617 miles after 6 years of use WARNING MESSAGE: "Vehicle may not restart" CONTACT: [XXX] [XXX] main contact for owner [XXX] . VIN: [XXX] MAKE: MODEL 3 YEAR: 2018 REPAIR QUOTED: $1,104.18 LINE ITEMS: PTC HEATER DUALZONE(1088218-00-I) HVAC, PTC SERVICEASSY(1107677-00-A) LABOR & DIAGNOSTICS SUMMARY: TESLA Model 3 Electric Vehicle shut down into "Asleep mode" and will not respond (turn back on). Locked out. Will not wake up. Will not respond to software nor car keys. All systems turned off. Will not charge. Will not release charger from charge port. Issue suddenly happened after [XXX] software load (deemed to not be the cause of issue). Dealership diagnostic shows PTC Heater failure which cuts off the battery. Dealership quoted estimated repair (see below). This could have happened while driving causing the vehicle to be uncontrollable, and a major safety issue. Fortunately, my incident happened after I parked...

Front Passenger Safety Restraint System Fault error. Tesla is indicating this is out of warranty but seems this is a very pervasive issue with an important safety mechanism on the car.

Seems that when brake pedal sensor can trigger a "pressed" reading when not actually being pressed. The only way to turn off the car manually is defeated by, you guessed it, depressing the brake pedal. This causes the vehicle to remain on and unlocked. Even if you are able to leave the vehicle in a locked park state, at any point, the sensor can register a "pressed" reading and essentially unlock and turn on the vehicle. I see this as a extremely serious safety issue. The issue seems to occur randomly at first and then more frequently. It can be confused with a known seat sensor issue which seems to also cause the same symptoms.

I am reporting a safety concern with my Tesla Model 3. The vehicle is equipped with both a high and low horn, and the low horn in my car has failed. After discussing with other early production Model 3 owners, I’ve found that this is a widespread issue affecting many vehicles. A failing horn is highly unusual in modern vehicles, and I believe this issue should be addressed through a recall due to its frequency among Model 3 owners. Tesla has quoted $400 to repair the horn, which seems unreasonable for a critical safety feature. It's important to note that some owners may not report the problem if only one horn (either high or low) is affected. However, the failure of either horn poses a significant safety risk, as the reduced sound output may not be sufficient to alert other drivers in emergency situations. I believe this defect requires further...

I have an error on my car, have had this for almost a year now, Front Left Safety Restraint System Fault. This seems to be a safety issue that Tesla should recall. I have seen thousands of online posts related to this same issue. .

Tesla has completely changed the user interface on a few occasions. It is now dangerous for me to try to change the danged radio station if the car is in motion because of the amount of attention to the display needed to locate and select something, even stations I regularly listen to. In a prior version the ones I regularly used easily popped up in a small area. It takes multiple touches just to navigate through to the station I last listened to. This is the worst they've done, but they regularly change the User Interface for no particularly good reason/benefit. Cars should be easy to use.

Vehicle started to display error message of "front left safety restraint system fault" intermittently, then would come on after the vehicle runs for about 5 minute and stay on. According to online forums, this is a common issue with Tesla Model 3, primarily related to the frequent movements of the seat (use of easy entry function). There appears to be electrical wires / sensors that can be damaged or pinched from moving the seat. There is no other issues aside from the safety alert. Tesla quoted more than $700, mostly in labor, to evaluate root cause of the issues. This can be a potential safety issue (not sure how this affects seat belt and/or airbag deployment), and it is not due to negligence or misuse of the vehicle; rather, this appears to be related to the design and quality of vehicle and should be covered by Tesla as a recall...

Car reports RCM a056 error related to Occupant Control sensors. This is apparently a common problem for this year and model (related car forums and social media report > 100 such incidents that I can find), but is not covered ($1700 repair). This should be a safety recall.

My Tesla Model 3 Made an Accident on [XXX] on [XXX] exit at [XXX] . The Tesla Model 3 is driving under Full Auto Drive. The Model 3 was waiting at traffic light at [XXX] exit at [XXX] . There is an other car stopped in the middle of cross road waiting on traffic. The light goes green, my tesla start to move trying to make left turn. But the other car still block the way. My car first stop and about 1 second the car suddenly run into the car and driver side mirror and door hit the other car’s tails light and rear bumper. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Drivers door opens at. random

Front Passenger Safety Restraint System Fault. From Invoice: Tesla to Replace Front Passenger Airbag And Update Vehicle Configuration Passenger Airbag error malfunction!!! Passenger Airbag Harness Malfunction!!! Correction: Retrofit SBR in OCS Equipped Front Passenger Seat - Remove and Replace Seatbelt issue!!! FIRST ROW SEAT HARNESS ASSEMBLY - RIGHT HAND FIRST ROW - SEAT BELT REMINDER SENSOR BOX CLIP FIRST ROW OCCUPANCY SENSOR Giving an error and now they are charging me to fix this defect in my Tesla Model 3

The buttons in the interior seem to be degrading much quicker than it should be. The window levers become lose and can break off. This is a safety hazard as in not able to raise the window if it allows to lower it. One has to park in order to raise windows in the mobile application. The plastics are breaking too quickly. There is also an issue with levers for the seat adjusting. Also, when canceling service requests in their application, Tesla deletes or hides them without an ability to see what was written to show proof later of their faults.

The rear-passenger door handle decorative chrome came detached in a strip from the middle of the underlying stronger material. It was *SHARP* and cut my wife's hand. Web searches showed others with the same issue, even one reporting being cut by it. Tesla said it was not a warranty item and cars break but did say it was odd to see it break in the way it did.

I engaged the vehicle's automatic parking function when prompted by the car. The process initiated as expected, and the car began to back into an open spot. In the process of parking, the automated system steered into a curb, damaging the left front wheel in the process. As an aside, the list of "Problem Parts" above should include "autonomous driving system".

Following an over-the-air software update, all audio in the vehicle stops working. This includes entertainment services, but more importantly turn signal indicator "clicks", forward collision warnings, parking assist chimes, shift confirmation and warning chimes, and various ADAS notification sounds. In some instances, the problem corrected itself within 24 hours. In another instance, it persisted for nearly a week before I discovered that unplugging the USB cable for the dashcam fixed the problem. The dashcam hard drive has been installed for over 4 years, per the instructions in the user manual, without problems until early 2024. There were no error notifications or anything else to indicate that there was a problem with the car's safety systems, or what the cause of the problem was, except for the lack of audio. I chatted with Tesla service about the issue. After discovering and sharing that disconnecting the USB drive fixed the issue, they...

Tesla Model 3 autopilot engaged. The car steered itself off the road and into a tree as it was accelerating on a residential street from 8 mph to approx. 30 mph.

Tesla is unable to remediate recall 23V-838; TC2023-657, the over-the-air software update will not install on my car and is asking me to pay at least $200 to diagnosis the issue and then potentially $1000 to fix failed hardware.

Front passenger safety restraint system fault. This is the second time this has happened.

I am unable to open my rear passenger car door from the outside or the inside. Also the rear passenger door also lacks a manual release like the front doors have. This, coming off of [XXX] 's death, and Tesla's service apathy and insistence on first collecting money before solving this problem is incredibly dangerous. So I am now driving a death trap, and this is my only car, and Tesla should have to pay for the fix, yet they are insisting I pay for the full price because my car is now "out of warranty." But with this kind of LIFE-THREATENING failure of a door that should honestly just work, is reprehensible. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The front right lower control arm, sub frame, and bolt(s) failed causing unsafe driving conditions while myself and my kids were in the car. There is a recall on this part for many of the exact same year, make, and model as my car: NHTSA campaign ID: 23V235000. Tesla recall SB-23-31-001 (info pulled from NTSB site). My VIN wasn’t on the recall, but there is clearly an issue, so I was forced to pay for this. Please add my VIN so I can be reimbursed and also get the other side repaired for safety reasons.

PTC Heater failed. This is a critical component that helps to maintain the battery's temperature within safe operating range. The only alternative is to replace this PTC Heater. Till the replacement is done, EVs battery may not maintain safe operating temperature range and could cause the car - not drive able. I consider this a significant safety risk. Cabin temperature cannot be maintained as well. Cause for PTC Heater failure is known - "change in temperature" could cause this item to fail per Tesla. i.e. when cold air blows over the heating element. Not sure if enough has been done to fix this from occurring for such a critical component with some hardware or hardware recall for several vehicles on the road. Else these cars must be considered for sales only for few states in the USA which have a stable operating temperature ranges for their PTC heaters to not...

Horn stopped working. I see other people have this problem with Model 3. Tesla does not cover this after warranty period.

The steering wheel horn stopped working about a month or so ago. I can use the Tesla app to make the horn sound but not by pressing the steering wheel. Fortunately, no safety of others or myself have been experienced. No one else has inspected it yet, though I am due to have my state inspection tomorrow and I don't think that it will pass. There were no warning lamps for messages prior to the failure. I think I first noticed that it wasn't working about a month or so ago. I reported the bug on the car texting service but have not heard from Tesla nor received a software update to fix the problem.

The rear camera often fails. Does this mean it is recording or not when driving. I think Tesla should have fixed this rear camera harness recall. I have been waiting over two years for this fix. It has been too long. Safety issues backing up or driving without the rear camera working properly.

My bluetooth has not been connecting in my car. To preface this, my car was in twice this year alone, with a near $3000 bill, to replace the MCU, on a car with only 26k miles. Now this bluetooth connection issue is still a problem. After opening a service ticket with Tesla, I am told for an additional $180, I would need to replace my seat sensor. This means my seat (while I am driving) does not recognize that someone is on it and driving. My concern is the manufacturer remedy does not replace failed parts with improved design and that this has the potential to cause other safety issues if occupant detection compromised by faulty sensors. What if I am in an accident and the airbags don't deploy?

On automatic setting, windshield wipers are erratic. Rain can be heavy and wipers don't engage. Requires manually operating wipers that are supposed to engage when windshield becomes wet from atmospheric rain.

I got into my car and turned on the climate control as normal. The vehicle is always parked in the garage. It was blowing cold air, no matter the temperature setting, or vent selection. There is a message on screen that reads “climate keeper unavailable due to system fault.” It’s not just that the cabin has no heat, which is uncomfortable, but terrible in much colder climates than mine. The heat not functioning means the defrost feature is useless. Water sprayed onto my windshield while driving this morning and froze! It stayed frozen because I didn’t have a functioning defroster or a warm enough cabin to melt it off that way either. It’s a known issue for Tesla’s, particularly with Model 3s. Tesla has never done anything to rectify it. My car has a resistive heat system, and this is the first time this has happened to me. There was...

Got into car after update, screen blacked out, could not to hard reboots. App could no longer see car. Tech support couldn't remote into vehicle or get in touch with it. Had to have it towed to service center. It's been sitting there for 6 days with no diagnosis just an estimate for $530 to troubleshoot the car. This update caused my car to completely be unresponsive and undrivable. I also had a carseat in the car.

The NHTSA recently forced Tesla to perform a "recall" including an over the air update that made changes to the Tesla Full Self Driving features. Before the recall I felt very safe driving my Tesla on FSD mode. After the update my car feels much less safe with an almost exponential increase in the number of on screen warnings that distract me and do not increase the safety of the vehicle. We do not need these unnecessary notifications that cause constant distraction from the driver's ability to pay attention to the road. These need to be immediately removed as I feel they will directly cause me to become distracted enough to lose control of my vehicle. We need less distractions so we can maintain focus on the road. Any on screen warnings forces the driver to look away from the road to look at the warning, then we get an...

Me and my wife cut the finger on vehicle door handle. The thin chrome covering the handles has peeled off cousin hazard. Can you fix your website, I’m unable to upload photos.

I had come to a complete stop at the red light for about 1-2 minutes when, unexpectedly, my car surged forward and collided with the vehicle in front of me. Initially, I believed someone had rear-ended me and caused the accident, but that turned out not to be the case. Although I attempted to apply the brakes to prevent the collision, it was unfortunately too late.

Intermittently over the past two months, the vehicle has been showing error code RCM_a056 with the accompanying message: Front passenger safety restraint system fault Service is required I reached out to Tesla and the service estimate was nearly $1500 to replace the Airbag "to maintain compatibility with Front Passenger Seat" for $942 and $414 to replace the Occupant Classification System (OCS) of Front Passenger Seat plus taxes. Basically, they want to replace the airbag and the seat sensor system. Many people on the forums have reported the same issue, which is sometimes fixed by replacing both components, just the sensor, or reseating the sensor cable. This is clearly a safety issue caused by a defect and these critical components should not fail this catastrophically in just 5+ years.

"Self-Driving System" turned into a one-way road, going the wrong way when the road was well labeled. I have had similar problems every time I have activated self-driving over the past 6 years. It is easy to reproduce the issue at any time.

I received a warning message that displayed, “Front Left Safety Restraint System Fault.” This is an engineering problem as the cables associated easily detach under the driver’s seat. Tesla has been long aware of this problem. They came out to my home and replaced the wire connection by installing sturdier connectors. I was subsequently was charged $329.40.

I tried to open the back door (the rear drivers side.) I could not get the handle to pop out as it normally does when I push in. I hand to push it very hard to get the handle out and once I grasped the handle I cut my hand on the handle. It seems the chrome wrap on the handle had started to come off some how, which is what was preventing the handle from opening in the first place. This must be a defect as there is no way a person could possibly damage this chrome wrap, as the handles are always tucked away.

Car swerved into my lane and horn failed to work to notify them that they were serving. The large push area at the bottom of the horn on my model 3 does not work. Service told me this was the design in the older models, and has been corrected only in newer models. So that means all older model 3's have a horn that does not work properly.

Received a Front passenger safety restraint system fault warning on my Tesla that went away but the service tech claims that they don't see that warning when brought to service center. I am concerned that they are not transparent or not seeing something that I clearly saw. Or if there is some software/technical glitch that displayed it. They were not clear on why it showed to me. The other issue is related to A/C compressor failing due to their software for cabin overheating. I had to pay for the A/C compressor to be replaced but feel that their software contributed to the problem.