Subaru WRX & WRX STI Manuals 2015 WRX & WRX STI Owner's Manual | Page 47

1-18 Seat, seatbelt and SRS airbags/Front seatbelt pretensioners & Seatbelt with shoulder belt and lap belt pretensioners NOTE This section is applicable to the front passenger’s side seatbelt. When a seatbelt pretensioner is activated, an operating noise will be heard and a small amount of smoke will be released. These occurrences are normal and not harmful. This smoke does not indicate a fire in the vehicle. Once the seatbelt pretensioner has been activated, the seatbelt pretensioner remains locked. Consequently, the seatbelt cannot be pulled out and retracted and therefore must be replaced. NOTE 1) 2) Seatbelt retractor assembly (shoulder belt pretensioner) Lap belt pretensioner On the front passenger’s side, the shoulder belt pretensioner is supplemented by a lap belt pretensioner, which is located at the base of the center pillar. Like the shoulder belt pretensioner, the lap belt pretensioner instantaneously pulls in the belt to eliminate slack if a certain level of frontal or side collision force is detected. As a result, the seatbelt restrains the front seat occupant more effectively. . Seatbelt pretensioners are not designed to activate in minor impacts or in rear impacts. . In cases of frontal collisions, the following components will operate simultaneously. – Seatbelt pretensioner for driver – Seatbelt pretensioners for front passenger (shoulder belt pretensioner only) – SRS frontal airbag for driver – SRS frontal airbag for front passenger* – SRS curtain airbags (both sides) (if an offset frontal collision occurs) *: This does not operate if the occupant detection system deactivates airbag operation. For details, refer to “Front passenger’s SRS frontal airbag” F1-39. . In cases of side collisions, the following components will operate simultaneously. – SRS curtain airbag (impacted side) – SRS side airbag (impacted side) (when both the satellite safing sensor and any of the center pillar impact sensors/front door impact sensors sense an impact force) – Seatbelt pretensioner for driver (when both the satellite safing sensor and the driver’s side front door impact sensor sense an impact force) – Seatbelt pretensioner for front passenger (shoulder belt pretensioner only) (when both the satellite safing sensor and the front passenger’s side front door impact sensor sense an impact force) . Pretensioners are designed to function on a one-time-only basis. In the event that a pretensioner is activated, both the driver’s and front passenger’s seatbelt retractor assemblies should be replaced only by an authorized SUBARU dealer. When replacing seatbelt retractor assemblies, use only genuine SUBARU parts. . If either front seatbelt does not