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Passenger airbag

Passenger airbag


A passenger airbag is available as a factory-fitted option. On certain markets, cars are equipped as standard with a passenger airbag. The airbag is mounted in the dashboard above the glove box on the passenger side and is connected to the control module as shown below and under Control module connections , Airbag (SRS) LHD and Airbag (SRS) RHD .

The cable carries test and detonation current from the SRS control module to the passenger airbag.

The passenger airbag, which has a volume of about 119 litres, incorporates a gas generator. The gas generator is bolted to the airbag housing, which is bolted to the dashboard. The airbag is held in place by a film with fracture lines. The dashboard has corresponding fracture lines.

Passenger airbag gas generator




1. Projectile

2. Membrane

3. Gas cartridge

4. Gas generator, 80%

5. Gas generator, 20%

6. Filter


The gas generator consists of a steel housing with two electric detonators, two explosive charges, pressurized gas and a distributor that cools and distributes the gas.

The gas generator is detonated in two stages: a primary stage (80%) and secondary stage (20%). The delay between the two detonations depends on the information the control module receives from the various sensors.

On receiving an activation command, the control module sends a current pulse to the detonator which ignites the explosive charge. The charge for stage one shots out a projectile, which warms the compressed gas. The gas expands and passes through a distributor into the airbag. The stage two charge further heats the gas which therefore expands further.

For more information on detonation signals, refer to SRS control module .