2018 TESLA MODEL 3 Seats Problems

Driving a 2018 Tesla Model 3, driver seat shows message "Front left safety restraint system issue. Service is required". This occurs when the driver is in the seat with the seat belt fastened and the vehicle is in motion. This issue refers to the possible seat belt, seats and/or air bags failure. This is a threat for drivers as these are the front line of defence in case of any collisions or accidents. This issue has been reported by multiple Tesla car drivers and their posts are available on online forums. Message appears on the Tesla screen driven. Tesla does not cover this out of warranty. My appeal to NHSTA is this is hazardous to drivers and cars should be recalled and repairs should be covered.

A sensor for the driver side safety restraint system was displayed from the vehicles screen. Potentially loose wires under the seat when manufactured.

This message has been intermittent and looking online has happened a lot for this model. The front passenger restraint system is critical for passenger safety, this should be a recall. Concern: Customer states:Alerts - Seats - Front passenger safety restraint system issue/Service is required Detected August 16, 2025

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...

RCM_a021 Front left safety restraint system fault error

Vehicle is displaying an error message "Front passenger safety restraint system fault" and "front passenger safety restraint system fault. Service is required." This has the result of "The restraint system may not function as designed." According to an Internet search, this is a very common fault, caused by "interference" and necessitates an occupancy sensor, wiring harness and airbag module exchange.

Tesla is aware of a common regarding an occupancy sensor in the passenger seat of their vehicles that impacts functionality of airbags and the restraint system. The error code is RCM_a056. A simple search of the code will show a myriad of ongoing issues with their vehicles

Got warning about front drivers safety restraint failure on screen. Airbag warning began to display on the side showing if an accident occurred, they would not deploy. Talked with Tesla representatives and was told this is a known issue but would not be covered. Seems to be faulty wiring from chair moving over time based on what I was able to read. Error code was rcm_a021.

Concern: I See the error message on my screen like restraint system fault require service. when I contacted Tesla for Sevice Repair I got an estimate which includes following fixes for a charge of 1,804.02. They are not covering for this saying the car is out of warranty. Seems like Tesla is aware of this issue and impacting many other Tesla's for 1) FIRST ROW SEAT HARNESS ASSEMBLY - RIGHT HAND(1489060- 03-G) 2) FIRST ROW - SEAT BELT REMINDER SENSOR BOX CLIP(1130363-00-B) 3)Correction: Replace Front Passenger Airbag And Update Vehicle Configuration - Remove and Replace

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. Even after I have...

Occupant classification System (OCS) for front passenger seat kept alerting while driving both with and without any person or object in the seat. I contacted Tesla service center and they stated that the occupant classification system (OCS) AND the front passenger airbag require replacement, otherwise the front passenger airbags will not function properly in a collision. I asked if this was a recall or covered by warranty, and they said no.

RCM_a021 Front left safety restraint system fault RCM_a056 Front passenger safety restraint system fault I have been noticing this error on my Tesla Model 3. Also, I researched on it and found out numerous people are having same problem. So, since it’s safety related issue there should be recall to fix it.

I started getting this alert on my screen a few weeks ago: RCM_a056 "Front passenger safety restraint system fault" Service Required. Tesla says the warranty only covered this issue up to 60,000 miles and I'm at 61,000. They are quoting like $2,000 to fix. They say they have to change something in the seat (sensor) and change the air bag since new sensor is not compatible with old airbag. Looked up issue and it seems to be common happening at before and after warranty for a lot of people. I see different quotes from $500 to $2000 (mine was the highest). This should be a safety recall. I do not suspect too many people getting this fixed on their own their due to the expense.

I randomly received an alert indicating “Front passenger safety restraint system fault” on my Tesla’s display. When I look this up, it indicates that the airbag may not deploy correctly in the event of an accident due to a seat sensor malfunction. When I contacted the service center, they quoted me at $1500 to repair this critical safety issue (involves replacing the seat sensor and reconfiguring airbags so that they will properly deploy). I believe this should be a recall and not something customers have to pay out of pocket to drive their car safely.

getting a "front left safety restraint fault" warning when moving the driver seat...is a known issue in tesla forums where the seat wiring harness is not secured properly and either a wire is crimped by the seat mechanicals or a wiring harness is pulled loose...

Started receiving Error RCM_a056 Front Passenger Safety Restraint System Fault. The vehicle shows that the passenger airbags are DISABLED after the alert is issued. I am working under the assumption that all passenger airbags (front, side, overhead) are currently disabled at all times. This puts my family at risk if there were to be a collision. Tesla seems to know exactly what the problem is because the estimate came back shortly with a list of fixes required at a cost of $1,768.35 to 1) Correction: install an Occupant Classification System (OCS) filter Module, 2) Correction: Retrofit SBR in OCS Equipped Front Passenger Seat - Remove and Replace, and 3) Correction: Replace Front Passenger Airbag and Update Vehicle Configuration - Remove and Replace. Quick internet search shows this is a SYSTEMIC problem with a bad part (Tesla forums and search your own databases for the past year or so... these are...

Received an alert about front seat safety restraint system fault. Decided to see what was needed for the fix and address my other trunk harness recall. Received invoice stating the airbag needed to be replaced along with $1900 quote. Knowing this info, if this doesn’t get fix the safety of my passengers are at risk so now I definitely can’t have any passengers. Not sure how I should be responsible for a safety seat airbag sensor defect.

My 2018 Model 3 started giving me the error "RCM_a056_passengerFrontOCS" today. This is caused by a faulty passenger occupancy weight sensor. This has been an ongoing issue in these models evidenced by SB-23-20-002 being revised 6 times. Tesla has resisted fixing this safety issue because the air bag also needs to be replaced to maintain compatibility with the redesigned Occupant Classification System (OCS) weight sensor evidenced in Tesla SB-23-20-001. Tesla has redesigned the known bad sensor part no. part 1121234-70-B with an updated part no. 099592-00-F which is only compatible with an updated airbag. The OCS weight sensor was defective from the point of manufacture. The RCM_a056 error only appeared after applying the latest firmware update that addresses NHTSA recall 24V-376. The firmware update made the firmware more sensitive to analog sensor readings which revealed the originally defective OCS weight sensor triggering the error message. Nearly half of the recent...

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...

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

Keep getting a safety restraint system fault error displayed and the estimate is more than $2000.This error just came out of the blue and I am not sure if the vehicle is safe to operate.

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.

While driving normally, an error warning was received that stated "Front Left Safety Restraint System Error" and the icon for an airbag fault would come in simultaneously. This error would disappear and reappear, sometimes up to 10 times per minute, creating a driver distraction due to the loud error chime. The error code identified for the fault when checked on the Tesla service screen corresponded to pretensioner wire harness. The pretensioner harness connects the seat sensors for driver weight and positioning to the car's airbag control system, which then classifies passengers and ensures that the airbags fire correctly in the event of a collision. For example, if a smaller female driver was operating the car but was incorrectly classified as male, the airbag could fire with excessive force and cause injury. The set of symptoms occurs commonly in Tesla Model 3s and are caused by the wear over time of...

Passenger Airbag and seat are faulty. Received error message on my car “front passenger safety restraint system faulty”. Tesla is wanting to replace the airbag and passenger seat and seat belt and it will cost few thousands dollars.

A defect in manufacturing causes the seat sensor (in this case: passenger) connection to fail. The connection has no retaining clip and falls out. This disables the airbag deployment calculations. Error code: RCM_a056 Telsa wants to replace seat and calibrate airbag at consumer's cost, Quoted ~$1500 I've pushed the connector back in several times over the past few years, one day it's going to hurt someone.

The 2018 Tesla model 3 has no manual release for rear passenger doors. Rear doors often fail to open due to door panel alignment or actuator for door. Doors will feel like they are opening but will be stuck. passenger will be unable to exit the rear of the vehicle incase of fire, power loss or due to an accident with no ability to exit the rear of the vehicle.

Front passenger seat restraint safety system fault. My car only has 40,000 miles is out of warranty. $2200+ estimate from Tesla. This safety issue happens often according to Tesla Owner sites.

Experienced safety restraint system failure on all four seats. Had them all fixed for ~$2,000. Front passenger restraint failed again next month. Know. Issue among the message boards online. Investigation into number of these repairs is likely merited.

Front Passenger OCS errors - Tesla work quote (via Tesla Service Bulletin, not Recall) is to replace the OCS system & front airbag - totaling $1,200 for the repair. This is extremely common error code for Tesla's "Front Passenger Safety Restraint System Fault".

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. I thought it was unsafe for Tesla to tell me the issue is a noise-related issue when it...

I'm getting an error for "Safety restraint system fault" on my Tesla Model 3. When I booked a service appointment it turns out they are wanting to charge $1,955.11 for replacing the Occupant Classification System (OCS) of the front passenger, updating the front passenger airbag, and installing a OCS filter module. This seems to be safety related and should be part of a recall. I have seen similar reports from other drivers on Reddit.

Front passenger safety restraint system fault message due to workers not torquing the seat belts into place correctly or properly verifying specs during build.

Get an error message - Front Passenger safety restraint system fault. - This is front passenger safety issue - This can put the front passenger to serious risk to injury or death - This message does not go away & Tesla acknowledges they need to fix it - Its not been inspected by police or insurance reps - Yes there is a warning message as noted above Tesla is failing to admit its their fault. They are giving me a quote of $2300 to fix this issue which I believe is a safety issue that Tesla did not manufacture properly leading to this issue. Please see the attached quote from Tesla - They need to "Update Front Passenger Airbag to Maintain Compatibility with Front Passenger Seat" and many other related fixes to get rid of this issue. TESLA SHOULD BE RECALLING VEHICLES FOR THIS SAFETY ISSUE!

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?

We intermittantly received alerts on the screen showing "Front safety restraint system fault (service is required)." After many hours of research, we found that other owners also have the same issue and they found that a wire from a electrical connector that connected to the seatbelt pretentension was broken from the seat being moved up and down.

There is an ongoing issue with Tesla's seat sensors that give an error screen while driving. Tesla seems to be systematically charging a standard $1.5K repair to replace a $100 sensor harness, but they're charging so much because they claim an airbag replacement is required (for an extra $1.2K) as part of the new sensor/wire harness installation. From a quick google search, it seems this is a pretty widespread issue that MANY Model 3/Y owners are encountering as their car ages-- with many noting that they were able to self-service the issue with buying the required harness and replacing it themselves. I wanted to bring awareness that to this issue and Tesla's poor and systematic way of overcharging customers to fix a widespread defect in their car seat design.

My Tesla has been in need of repair for a "System Restraint Fault" 5 times since the car was purchased and 4 times in the past year. The Tesla service center has replaced multiple components including the seat harness, seat sensor, airbag, low voltage circuits over the span of the service appointments. It is unknown what would happen if an accident were to occur with the sensor fault activated or if it would cause an accident. I bring this issue up because it is a known issue to Tesla but I have not seen any recall information, nor does it seem like the service centers know how to fix the issues, especially since I have taken the car in so many times during the life of the car.

When driver seat adjusted to end positions (e.g all the way up/down/forward/backward), it causes an error message stating “Front left safety restraint system fault” & and airbag failure icon would appear. This usually cause by the wire harness being pinched or stretched. The error message may come and go based on the position of the seat, and occurs more frequently as time goes by. I am concern that the airbag or other safety restraint system may fail to engage when the message pops up. Tesla community has reported similar failure.

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...

I had a seat weight sensor error. Took into repair and the replaced sensor and then informed me they need to replace airbag because it’s not compatible with the new sensor. Then was told that it would cost $1100 more than estimate to replace an airbag that is in working condition. Tesla purposely replaced sensor that was not compatible with the way they built the car and expect consumer to pay for it.

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.

I kept getting notifications indicating that there was a Front passenger safety restraint system fault - RCM_a056. On reaching out to Tesla service, I received an estimate for more than $2000 to fix and they appear to be replacing the seat, occupant classification system or sensor, and also Front passenger airbag. I found many instances of this issue on online forums(with different error codes) and I am worried that this may be a widespread safety issue related to the seat belts or corresponding components which may prevent them from detecting occupants or failing to prevent injury in case of a crash.

For the past 2-3 weeks, my vehicle has been intermittently displaying an error message that reads “Front left safety restraint system fault,” accompanied by the error code RCM_a021. This error has been appearing nearly every day and seems to indicate a malfunction in the Restraint Control Module, specifically relating to the front left safety restraint system. Importantly, the vehicle has not been in any accidents, and no recent repair work has been done that could explain the onset of this issue. This malfunction poses a significant safety risk. The front left safety restraint system, which includes crucial components like the seat belt latch sensor and the pretensioner system, is designed to protect the driver in the event of an accident. Given the critical nature of these safety features, the issue at hand could compromise the vehicle’s ability to protect its occupants, thereby placing both the driver and passengers at considerable...

The front passenger seat driver occupancy system started sporadically malfunctioning and showing the "air bags disabled" warning even while the seat was occupied. This would put the passenger at risk in the event of a crash. The manufacturer's technician arrived to inspect the vehicle and upon hearing the description of the problem said it was likely that a cable in the seat's wire harness probably wore out from friction and that "it was a common issue in these vehicles". Upon examining the wire harness the technician confirmed that this was the issue, and the harness had to be replaced.

"Front safety restraint system fault" message comes up sporadically and then regularly. Tesla has address this issue at least four times but it has not been resolved. I was told they ordered a new seat but now they are backtracking on this.

Front passenger safety restraint system fault error message. Error messages comes up most of the time when starting a drive. Tesla reviewed the error message remotely and provided a repair quote.

The passenger safety restraint system fault message pops up when driving normally. The diagnostic came up to replace the whole airbag after communicating with service center.

The vehicle is reporting a right passenger restraint error message on the screen. Tesla "fixed the sensor" in 2021 under warranty. Now the same issue is present and Tesla says they have to replace the senor again with a newer one which is now no longer compliant with the OCS system or the air bag. They are charging customers $1600 to replace the sensor, OCS and airbag, all of which are safety specific requirements and is a product failure on their part. The error comes and goes at random, and at any speed. As low as 0-5 mph and as much as at 75mph

Front passenger safety restraint system fault. Tesla refuses to fix unless I pay out of pocket.

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...