What 982 owners told NHTSA about the 2018 Tesla Model 3 Bev

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 a poorly designed wiring harness, which chafes as the seat is moved forward and backward until it breaks. This is a known problem by Tesla and they have a specific service bulletin designed to address it, which I have attached below. When taken in to address the issue, Tesla performed the procedure in the attached bulletin and identified a damaged harness, which was subsequently replaced. I retained the damaged harness for inspection. The invoice for this service is attached. No other defects were identified that could have caused the issue. This is a safety related issue occurring due to a manufacturing related defect and should be a mandatory recall with complimentary repair.

NHTSA ODI 11587940

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.

NHTSA ODI 11586476

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.

NHTSA ODI 11585180

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.

NHTSA ODI 11583984

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.

NHTSA ODI 11584166

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.

NHTSA ODI 11582589

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".

NHTSA ODI 11579392

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 was related to the airbag and to tell me that the issue was not actually a real fault when both the OCS sensor and the airbag needed to be replaced. I think it's absurd to have a car 6 years old with 66,530 miles have to have an airbag replaced. I thought Tesla's comments about noise were disingenuous attempts to put off the repair until after the car was out of warranty.

NHTSA ODI 11578369

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.

NHTSA ODI 11577664

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

NHTSA ODI 11576508

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!

NHTSA ODI 11572751

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?

NHTSA ODI 11570445

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.

NHTSA ODI 11565648

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.

NHTSA ODI 11564541

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.

NHTSA ODI 11564461

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.

NHTSA ODI 11563598

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 have not had them look visually yet though. They do not cover the repair for this as it's out of warranty. There's even a bulletin posted on this issue/repair by NHTSA therefore is known problem. [XXX] I'm unable to upload any files. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11563602

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.

NHTSA ODI 11560787

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.

NHTSA ODI 11556336

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.

NHTSA ODI 11556372

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 risk. The vehicle has not been inspected or diagnosed by a Tesla dealer, an independent service center, or any other entity such as police or insurance representatives. This absence of professional evaluation further underscores the urgency for a thorough investigation into the root cause of this fault. There were no precursors or warnings prior to the appearance of this error message. The issue spontaneously manifested and has been consistently reoccurring. This lack of predictability elevates the risk associated with the fault, making it vital to investigate and resolve it expediently. The intermittent but consistent fault code RCM_a021 affecting the front left safety restraint system in my 2018 Tesla Model 3 is a significant safety concern. Given the absence of any recent repair work or incidents or recalls that could account for this problem, along with the lack of any professional diagnostic evaluation it’s my hope that NHTSA and Tesla take appropriate action to investigate and resolve this potential safety defect.

NHTSA ODI 11552387

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.

NHTSA ODI 11551941

"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.

NHTSA ODI 11550207

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.

NHTSA ODI 11545687

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.

NHTSA ODI 11545748