Rear emergency tensioning retractor, function - GF91.40-P-4001-04PP

When the unit is triggered the solid fuel is ignited by the left rear ETR squib (R12/6) and the right rear ETR squib (R12/7).

A pressure is built up in the cylinder, which moves the plunger. The plunger pulls the seat belt buckle toward the vehicle floor by means of the cable and the seat belt guide.