Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2018 Tesla Model 3 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2018 Tesla Model 3. The contact stated that while opening the doors of the vehicle, the driver's side seat back unintendedly reclined and pressed down on the rear seat, causing the cushion to become deformed. The contact manually used the seat controls to return the seat to an upright position. There was no warning light illuminated. The contact stated that the failure was intermittent and only occurred while the doors were opened. A Tesla service center was contacted; however, an appointment was not scheduled for diagnostic test. The contact was provided an estimate for the repair. The vehicle was not diagnosed or repaired. The failure mileage was approximately 95,000.
My car went out of warranty for seat related issues in December of this past year 2023. I don't even have 26K miles on my car therefore not a heavy driver. This week I experienced an error RCM_a021, front left safety restraint system fault, which I've researched has affected many others and appears to clearly be a safety flaw. The service team mentioned this isn't covered. My airbag light doesn't go off and is constantly on, my seats no longer save the seat setting (which occurred a couple of months ago but I didn't think about it).This is a safety hazard should I get into an accident. There were no previous warning issues prior to this warning error which occurred this week. According to Tesla, if the airbag light remains lit, schedule a service appointment immediately and do not drive. The service team mentioned the seat harness is faulty remotely and according to what they can see. …
I purchased the car new in 2018. About two years into owning there would be a random notification about an "rcm_a036 : passenger safety restraint system fault". I reported and was told that the seat occupancy sensor was responding to noise from my cell phone. I stopped putting the cell phone on the seat, it kept happening with increasing frequency in 2021 and 2022 and I reported it two more times and was told to keep charging cables away from the seat, and then in 2021, they added a noise filter. I was told repeatedly that the fault was caused by noise and was not a real issue. The alert occurred with increasing occurrence and today I took it in and Tesla charged $1533.16 to replace the airbag and the occupancy sensor. …
My vehicle has a faulty seat sensor in the drivers seat. In some instances my car remains on without my knowledge when exiting. I return to the car with the headlights on and the main info screen on as if there were someone seated inside. Since this is a keyless electrical vehicle, we have been trained to just exit the vehicle without pressing a off button or turning a key to the off position and removal. Also when entering the car and first sitting down in the seat, the car then turns off completely after closing the door. The car will turn back on after buckling the seat belt or pressing the brakes. After researching to see if there was a fix or if it was a known issue I stumbled upon a large number of people and threads that are having the exact same problem. …
The car issued me a "front left safety restraint system fault" saying service is required. The code it flashed was RCM_a021. I am able to get the code to go away by adjusting the seat, however, if i shift my weight or i hit a bump in the road, the warning will appear once again. This leads me to believe that there is a component in the seat that is defective. I took vehicle to the Tesla service center where they found a "broken wire in the pretensioner connector" and they replaced the wiring harness. Upon doing investigation it appears that there are multiple components that are used to determine the firing intensity of the airbags should they go off. If either are damaged the airbags will not fire correctly. Some of these components can be easily damaged due to the seats constant back/forth motion if the easy entry mode is enabled on the car. …
The front passenger safety restraint system is triggering an on-screen warning error that says service is required. This puts my front passenger at risk of death in the event of an accident. I have sent the manufacturer (Tesla) a request for service and received a confirmation of the errors with a list of parts to be replaced for a sum of $1200.65. I understand there is a service bulletin for this issue (Bulletin SB-19-20-003), but Tesla still will not fix it for free even though it is a safety issue. In the estimate, Tesla listed the following components as failure points that need to be replaced: 1) FIRST ROW OCCUPANCY SENSOR(1099592-00-F) 2) FIRST ROW - SEAT BELT REMINDER SENSOR BOX CLIP(1130363-00-B) 3) FIRST ROW SEAT HARNESS ASSEMBLY - RIGHT HAND(1489060-03-G) 4) AIRBAG HARNESS RETAINING CLIP(1028053-00-A) 5) BOLT,EHS,M6X19,[88],ZN,SMAT,ADH. …
An error code (RCM_a056) will intermittently come up and say there is a fault with the front passenger safety restraint system. It will turn on for a car ride and stay off for a few days and come back randomly. When I researched this code, I found that this is a known issue with 2018 Tesla Model 3's. Apparently there was a flaw in the airbag system which causes this safety concern. I contacted a Tesla service center and they said it would cost $300 just to check it out and another one said +$1000 to "fix". I called their customer service line explained that this should be covered for free since it is not due to "normal wear" but rather should be a safety recall. I also explained this to the service techs but they just said they can't do anything. If I would have been involved in an accident, my wife could have died because of this safety flaw. …
This is for an issue noted on a 2018 Tesla Model 3. On August 2020 the car was serviced for an error message that stated "Front passenger safety restraint system fault/Contact Tesla Service", this went into service for an "OCS REWORK" which was explained to me as some harness under the passenger seat; cost was covered under Limited Warranty. Issue came back on August 2021, same exact one "Front passenger safety restraint system fault/Contact Tesla Service", and went into service again. This time service needed to replace the whole passenger seat, at Out of Warranty cost of $2,059. After explaining the recurring issue, an agreement was reached for a discount; but still ended up paying for theft of the same issue again. Thought appropriate to report this issue, since from the warning, seems like a restraint system problem that can be a bigger issue if not recalled or fixed within warranty.
Received an error "Front left safety restraint system fault. Service is required." error on my vehicle yesterday (7/11/2023) which disappears when lifting seat to highest position. As soon as seat is lowered more than 1/2" the error reappears and airbag light is illuminating notifying that the airbag is not enabled. This error is clearly an issue with the safety restraint system on the vehicle but Tesla will not honor fixing this under their Supplemental Restraint System Limited Warranty. The vehicle is within coverage period (<5 years and <60,000 miles). I am being told this SRS Limited warranty covers air bags, seat belt, seat belt buckles, sensors, and modules only. I have not taken the vehicle in for service as the quote I received is too expensive ($601). Please see photos for my conversation with Tesla service as well.
I am writing to report a safety concern with my Tesla Model 3 vehicle. The issue pertains to a persistent warning message that displays "Front Passenger Safety Restraint System Fault". This warning suggests a potential malfunction in the safety restraint system, which could pose a significant risk to the passenger in the event of an accident. The warning message first appeared in July 2019 and has since been a recurring issue. Last December 2023, I paid out of pocket to get this serviced. The warning disappeared for a few months but reappeared recently. I have scheduled a service appointment with a Tesla service center to diagnose and hopefully rectify the issue. However, I felt it was necessary to report this to the NHTSA due to the potential safety implications for other Tesla Model 3 owners if this is a widespread issue.
Seat complaints in other Model 3 years
Frequently asked questions
How common are seat problems on the 2018 Tesla Model 3?
NHTSA has 74 complaints about the seats of the 2018 Tesla Model 3, 7% of the model year's 1,032 complaints.
Is there a recall for 2018 Tesla Model 3 seat problems?
No. NHTSA lists no seats recall for the 2018 Tesla Model 3, though it has 19 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2018 Tesla Model 3 seat problems start?
Half of the complaints with a recorded mileage happened before about 48,000 miles, and 25% before 25,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.