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Wheel change
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Video Safety 1
Video Safety 2
Video Safety 3
Video Safety 4
Video Fire extinguisher
Video History
Video Air Bag 1
Video Air Bag 2
Video Air Bag 3
Video Air Bag 4
Video Air Bag 5
Video Tube Inflator (air bag)
Video Headrest
Video Seat-belt
Video Body Safety
Video NCAP-norms (body)
Video Pedestrian Protection
Video Antilock System
Video ABS/ESP-Hydr. Unit
Video Lighting System
Video Park assist
Video Electr. Dist. Contr. 1
Video Electr. Park Contr. 2
Video Tyre Press. Contr.
Video Heating - A/C
Video Child Safety Seat
Video Reboarder
Video Anti-theft Alarm
Video Armored Cars 1
Video Armored Cars 2
Video Air Conditioning
Video Navigation Systems
Video Steering
Video Tyre (speedlimits)
Video Safety Steering
Video Tachometer
Video Wiper 1
Video Wiper 2
Video Wiper 3
Video Rear wiper
Video Air Heating

Video Safety 1
Video Safety 2
Video Safety 3

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Airbag Ignition



This is a sectional view of the steering wheel impact absorber. At the bottom, embedded in a plastic covering, the steering wheel rim can be seen. Below the folded airbag, the empty gas generator is visible. The electric ignitor is installed in the hollow in the center. The propellant, made up of sodium azide, potassium nitrate and sand, pressed into tablet-form, is found in the ring-shaped channel. This provides for the quick development of nitrogen gas, which inflates the airbag with the releasing of heat. Consequentially, the metal rods on the way to the airbag, serve the purpose of cleaning and cooling.

The dismantling of the steering wheel impact absorber demands certain safety measures. These are stipulated by the vehicle manufacturer. E.g., the bridging of two electric contacts after pulling off of the plug-contacts may be necessary. Although the triggering of the airbag can help to save lives in the event of an accident, in the the case of an unwanted or faulty triggering, it can also endanger the life of the mechanic.

Once the dismantling or disconnecting has been successfully carried out, one can simulate the signal to the control device of the airbag or the seat-belt tensioners, which would be given in the event of an accident. We won't be publishing any resistance values here, to avoid the dishonest covering-up of any faults. One should also not attempt to measure it, because even the tension given up by the Ohm-meter can trigger the mechanism. What one can do, is test, using a small resistance, to see if the problem lies with the airbag or, e.g., with the wiring. 05/12               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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