2019 Tesla Model 3 seat belts problems

“2019 Tesla Model 3. In September 2022, Tesla Service Jacksonville replaced the entire front passenger seat assembly after a front passenger restraint fault alert; invoice 3000S0005274914. In October 2026, the same front passenger restraint fault returned. Tesla's estimate is $1,608.94 for diagnostics, airbag compatibility update, and occupant classification sensor replacement. Goodwill was denied on October 26, 2026, and on November 4, 2026, customer support said the goodwill decision is automated and cannot be overridden. No crash or injury related to this fault. The front passenger seat is not being used until repaired because the restraint/airbag system may not function correctly.”

“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…”

“I’ve been seeing lots of similar front safety restraint issues from other Tesla owners on different sites. This safety restraint issue is regarding the wiring under the seat that get Pinched or Loose Wires: Movement of the front seat can pinch wires or dislodge connectors underneath, triggering errors like RCM_A028 or RCM_a033. If you’re out of warranty, Tesla charges a lot of money to have them fixed but I would say it is a safety issue that they should recall and fix without charge.”

“There's a faulty connector for the drivers seatbelt pretensioner. The car is reporting RCM_a021_pretenLabFrontLeft and internet searches show this is a somewhat common error for a faulty connector that fails under normal usage.”

“Alert RCM_a021pretenLapFrontLeft. Caused by the seat harness wires being pinched and stretched when moving the seat back/forward/up/down. Eventually the wires are damaged by the seat movement. Tesla has touted a feature called "Easy Entry" which moves the seat to a preset position to allow the driver to get in and out of the car more easily. This moves the seat lower and farther back and then moves the seat back up to the driver's position when ready to drive. This increased seat movement, every time the driver gets in and out of the car, causes the wires to wear prematurely and the above fault to trigger. In the event of an accident the driver side airbag may not deploy and/or the seat belt pretensioner may fail to lock the seat belt in place, leaving the driver exposed to serious potential injury risk. This issue can be seen in 2019 Tesla Model 3s and I believe an investigation by the NHTSA is warranted, at the very least.”

“Front passenger safety restraint system issue requiring replacement of Occupant Classification System and updating front passenger airbag to maintain compatibility with front passenger seat. Costing almost $2000. Many others have reported of multiple repairs”