2018 Tesla Model 3 seat belts problems

Filed Sep 22, 2026 · Airbags, Seat belts · CA

- When I start my car, I see the following error message appear: Front Left Safety Restraint System Fault. Also, the air bag disabled alert is displayed. Since the air bag is disabled, it puts me at grave risk if I were to get into an accident. - Many other Tesla owners have reported the same exact issue (RCM_a021 Front Left Safety Restraint System Fault). - Today, I took the car into the Tesla Service Center, they had to replace the entire harness. - No other symptoms were apparent...just all of a sudden the alert appeared.

Filed Sep 16, 2026 · Airbags, Seat belts · AZ

Vehicle Information: Year/Make/Model:Â 2018 Tesla Model 3 Mileage at Incident:Â 45,000 miles Description of Safety Defect: A sudden and persistent "Safety Restraint System Fault" / "Front Passenger Safety Restraint System Fault" warning illuminated on the vehicle's primary touchscreen interface, indicating a complete compromise of the supplemental restraint and airbag system. Upon inspection by Tesla Service, the root cause was identified as physically broken/severed internal copper wiring within the first-row passenger seat harness assemblies. This breakage occurred purely due to the mechanical wear-and-tear of normal fore-and-aft seat tracking (including the standard vehicle "Easy Entry" setting). Because the electrical line cleanly severed, communication to the Occupant Classification System (OCS) sensor was totally cut off, preventing the vehicle from accurately detecting passenger occupancy or correctly configuring front passenger airbag deployment logic in a collision. Tesla has addressed this known design vulnerability internally via Service Bulletin SB-23-20-002, replacing the weak early-production parts with ruggedized components. However, because the vehicle was past its calendar warranty period despite having only 45,000 miles, I was forced to pay $1,322.00 out of pocket to restore critical safety systems. Because a severed seat harness disables essential airbag safety constraints through normal everyday use, this represents a systemic manufacturing defect that should be escalated from a Technical Service Bulletin to a mandatory Safety Recall to protect all owners. Specific Component Part Numbers Replaced: First Row Seat Harness Assemblies: P/N 1489060-02-G & 1489060-03-G Passenger Airbag Assembly Module: P/N 1077323-00-G Seat Position / Occupancy Sensor Module: P/N 1099592-00-F

Filed Sep 12, 2026 · Airbags, Seat belts · CA

Driving tghe 2018 Model 3 with around 75K miles, the warning "FRONT LEFT SAFETY RESTRAINT SYSTEM ISSUE" keeps popping up and staying on the center console. Tesla said car is out of warranty and have to pay upto $2000 to fix it.

Filed Aug 21, 2026 · Airbags, Seat belts · CA

My 2018 Tesla Model 3 displayed alert RCM_a056, “Front Passenger Safety Restraint System Fault.” The warning may affect correct detection of a passenger and operation of the passenger restraint/airbag system. Tesla quoted approximately $705 but has not identified the failed component or explained whether the condition is related to known front-seat wiring or occupant-classification failures. Tesla Repair Bulletin SB-21-17-005 recognizes that electrical harnesses in 2017–2019 Model 3 front seats can be damaged through repeated seat movement and trigger restraint-system alerts, although that bulletin specifically lists codes RCM_a021 and RCM_a022. I am reporting RCM_a056 because it affects the same general front-passenger safety-restraint system and appears to be reported by other early Model 3 owners. I am concerned that an occupant may not be properly classified or protected in a collision.

Filed Jul 7, 2026 · Seat belts · 102,000 miles · CA

The contact owns a 2018 Tesla Model 3. The contact stated that while driving at various speeds on multiple occasions, the message "Front Left Safety Restraint System Issue RCM_a021" was displayed. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 102,000.

Filed Jun 27, 2026 · Seat belts · CA

Tesla notification that front left safety restraint system has an issue. Service is required. Who isn't going to take their car in when there is an alert saying the safety restraint system has an issue. Then $232 in parts and $484. in labor. After taking in it was diagnosed that seat harness being pinched against the outboard shield causing the pretensioner to fault. Need to replace the seat harness and the pretensioner. Ended up being $232 in parts and $484 in labor. My safety was at risk because this system affects the seatbelt and airbags. Problem was diagnosed, confirmed, and repaired at my cost. Tesla dealership inspected. Thousands of tesla owners repairing at their own cost- maybe should be recall.

Filed Jun 2, 2026 · Airbags, Seat belts · AZ

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. - KNEE AND PASSENGER AIRBAG BOLT(1116594-00-B) 6) BOLT RC M6-1.25x26(1036655-00-A) 7) PASSENGER AIRBAG(1077823-00-G) 8) BOLT,HF,M6X7,STL[88],ZN,SHLDR[8X18]. (1105061-00-E)

Filed Dec 21, 2025 · Seat belts · MD

Tesla refuses to fix recall the federal safety agency No: 22V798.

Filed Oct 19, 2025 · Airbags, Seat belts · NY

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

Filed Oct 3, 2025 · Airbags, Seat belts · IL

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.