2019 Tesla Model 3: airbag warning light

Filed Oct 19, 2026 · Airbags, Seat belts · TX

1. Component/System Failed: Supplemental Restraint System (SRS) — Front Passenger Seat Occupant Classification System (OCS) / Occupant Sensor. Component intact and available for inspection upon request. 2. Safety Risk: Failure disables or compromises front passenger airbag deployment and seat belt pretensioner logic. In a crash, the vehicle may fail to deploy the airbag/pretensioner for an adult passenger or deploy improperly, creating severe risk of serious injury or fatality. The passenger seat cannot be safely occupied. 3. Problem Reproduced/Confirmed: Yes. Tesla Service confirmed an active SRS/OCS fault (OCS1P_w127_seatbackSelfOpen). The technician acknowledged this failure is widespread on 2018–2020 Model 3s and noted their own personal Model 3 experienced the exact same issue unaddressed for years. Technicians stated company guidelines require recommending the fix due to liability, though many owners decline due to high out-of-pocket costs. 4. Manufacturer Inspection & Design Defect: Inspected and repaired by Tesla Service. Resolving the faulty OCS sensor required replacing the seat cushion/sensor assembly AND upgrading the front passenger airbag. Tesla redesigned the SRS signaling on newer revisions in a backwards-incompatible manner. This forces out-of-warranty owners to pay for a mandatory airbag replacement simply to achieve physical/electrical compatibility for a failed sensor pad. 5. Warning Messages & Timeline: Persistent "Front Passenger Safety Restraint System Issue" alert on touchscreen and illuminated red SRS/airbag warning lamp on instrument panel. First appeared at ~50,000 miles without physical impact, seat modification, or liquid spill. Remains continuously active. System was ultimately repaired at owner expense.

Filed Jun 18, 2026 · Airbags, Seat belts · MI

It was raining and my passenger got in the car (slightly damp). When he sat down, I reveived an error message on the screen saying "Front passenger safety restraint system issue". The airbag light is red indicating that it won't work for my passenger. You should be able to get into a car wet without your airbag no longer working. My understanding is that this is a common problem. Tesla wants > $1000 to replace the seat sensor + requires me to pay to have my airbag replaced so the part matches the sensor. According to Tesla Service Bulletin SB-23-20-002, the new style of seat sensor is strictly incompatible with the older style of airbag (known as a "Full Suppression" airbag). $182 (Diagnostic Fee) $475 (OCS Replacement) $318 (Airbag Update) + Labor + Tax The internet is full of reports of this issue. Just google "Front passenger safety restraint system issue". I do not have an invoice for the repair yet. Tesla's service center's first available appt is in 25 days. This means I have to go 25 days without a passenger in my front seat.

Filed Jan 19, 2026 · Airbags, Seats · CA

Warranty Alignment: This failure occurred at 47.7k miles, well under the 60,000-mile threshold of the Supplemental Restraint System Limited Warranty. Known Defect: This repair is the subject of a specific Service Bulletin (RCM_a078), confirming it is a known manufacturing issue and not standard wear-and-tear. Safety Criticality: The SRS is a primary safety system. Forcing a customer to pay for a known defect on a life-saving system at such low mileage is inconsistent with Tesla’s safety mission. I have already paid the high invoice to ensure the vehicle was safe to drive. Tesla did not consider the goodwill repair request for known manufacturing defect that puts passenger at risk. Such safety related repair should be part of safety recalls.

Filed Aug 4, 2025 · Airbags, Suspension · NY

The contact owns a 2019 Tesla Model 3. The contact stated that the passenger's side air bag warning light was illuminated. The vehicle was taken to the Tesla Service Center, where it was diagnosed and determined that the passenger's side seat sensor had failed. The seat was replaced with a new seat; however, the air bag warning illuminated after the repair. The vehicle was taken back to the service center, where the contact was informed that the technician had failed to install the module connected to the air bag during the previous repair. The seat replacement was performed a second time; however, the failure persisted, and the contact noticed that the seat was not installed correctly. The contact requested for another service through the Tesla App, but the request was denied. The contact was informed that the vehicle was repaired, and the notification of the failure was due to a glitch in the system. Additionally, while driving at various speeds, there was an abnormal creaking sound coming from the front suspension. The contact stated that the sound became louder while turning. An appointment was scheduled with the Tesla Service Center. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was unknown.

Filed Apr 15, 2025 · Airbags, Seat belts · FL

The front passenger seat’s OCS required a service bulletin application, involving a retrofit of the seat belt reminder sensor and component replacement, confirmed by a Tesla technician. The repair likely falls under TSB SB-19-20-003 (2017-2019 Model 3), addressing OCS electrical interference causing airbag indicator issues, which can affect seat belt reminder functionality. The TSB involves retrofitting parts My 2019 Model 3 (39,140 miles) needs an OCS repair per SB-19-20-003, a known safety issue from 2019 affecting airbags and seat belts (FMVSS 208). Since it’s a manufacturing defect and a safety risk this should be under a recall.

Filed Feb 4, 2025 · Airbags, Electrical · CA

passenger safety restraint system light came on, Tesla says to fix needs to install OCS filter module and replace existing OCS sensor because its not compatible with existing OCS sensor...cost is $806....there are no broken parts in my car. according to Teslas service bulletin Sep 21, 2020 this problem is caused by electrical interference in the seat harness causing the airbag restrain system message on screen due to faulty design.....Tesla says i need to pay for it because car is out of warranty, i say its a faulty design and they have to fix free. this should be a recall because Tesla is aware of many of same problems that make the airbag inoperable. from the bulletin "On some Model 3 and Model Y vehicles, the Occupant Classification System (OCS) signal might be affected by electrical interference in the seat harness, causing the airbag indicator to display on the touchscreen." Tesla has been aware of the problem for 4 years at least.

Filed Sep 11, 2024 · Airbags, Seat belts · FL

Over the last few days, an alert has come and gone numerous times indicating a fault of the front left safety restraint system. As of today, the alert persists and does not go away. The computer reports an error code of “RCM_a021 Front left safety restraint system fault. Service is required.” Additionally the airbag indicator is illuminated, which I believe means that it is disabled because of this error.

Filed Jun 4, 2024 · Airbags, Electrical · CA

Received a system fault for seat belt SRS airbag safety restraint system for front left passenger. code RCM_a021_pretenLapFrontLeft Causes the pretensioner and restraint system to not function as designed. Has not been in an accident and verified problem was persistent with hard system reset and software update. Did not do modification or touch the seat belt components at all during ownership period. Worried that the pretensioner and SRS airbags will not go off if involved in a crash. First appeared last year intermittently and then starting June 1st, 2024 The airbag lamp is on inside the warning panel of screen.