How the belt tensioners workHow the belt tensioners work  - Belt tensioners - Seat belts - Safety - Audi A4 Owner's Manual - Audi A4

The seat belts for the driver and front passenger are equipped with belt tensioners.

The seat belts on the front seats are tensioned automatically in frontal, side and rear-end impacts above a certain degree of severity. This helps to reduce the forward motion of the occupants.

In a less severe accident, or in the event of a roll-over, the belt tensioners are not activated.


  • Х Any work on the tensioner system or removal and installation of system components for other repairs must be performed by a qualified workshop.
  • Х The belt tensioners can only be activated once. If they have been activated at any time, the system must be replaced.


  • Х Some smoke may be released when the belt tensioners are activated. This does not mean there is a fire in the vehicle.
  • Х The relevant safety requirements must be observed when the vehicle or components of the system are scrapped. Your authorised Audi dealer is familiar with these regulations and will be pleased to pass on the information to you.