NHTSA Complaint #11480068 — 2018 TESLA MODEL 3

In 2021 the vehicle reported – “Front passenger safety restraint system fault/Contact Tesla Service”. Tesla performed OCS rework installing an Occupant Classification System (OCS) Filter Module (part SERVICE KIT – OCS REWORK (1479982-00-C)). In 2022 the vehicle reported “RCM_a056 Front passenger safety restraint system fault service required”. Tesla’s proposed correction is to replace seat (part 1ST ROW SEAT ASSEMBLY – RIGHT HAND – PUR BLACK (7654324-91-C)). The safety risk may be serious and alert RCM_a056 is being reported by other owners on the web so the problem is not isolated. My understanding is the Occupant Classification System (OCS) Filter Module is part of the airbag system and weighs occupants in the front seat. The OCS Filter is used to determine if the front seat is occupied and possibly classify occupants by weight to determine if and/or by how much airbags should be deployed. The safety of a person in the front passenger seat maybe at risk because of this faulty OCS which could result in airbags failing or deploying dangerously based on erroneous OCS inputs. The problem was identified by two faults reported by the vehicle, the first OCS failure was confirmed by a Tesla Mobile Technician and the component was replaced (part SERVICE KIT – OCS REWORK (1479982-00-C)). The Tech said the seat heater was causing interference with the OCS’s unshielded wires. The second fault the vehicle reported was also confirmed by a Mobile Service Technician who said the replacement OCS filter module “can’t be calibrated”. Please note that this is the second failure of the same component. Tesla has the OCS Module replaced in March of 2021. No other parties have inspected any of the OCS Filter Modules. I will make an effort to retain the seat being replaced. Only two fault with “RCM_a056” code and “Front passenger safety restraint system fault” text were reported by the vehicle. There were no other symptoms related to this faulty module.