Restraint System Pyrotechnic, Electric And Mechanical Components, Replacing After A Collision

WARNING: This page is about a different car, the 2023 Audi S3, 2023 Audi RS 3, 2023 Audi A3 Quattro, and 2023 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Vehicle Diagnostic Tester

TIP:

The airbag control module can be used for up to two deployments of the side airbag and/or seat belt tensioner with airbag generation 8.* >>not 8.R<<.
The airbag control module with airbag generation 9.*, 10.* and 8.R. can be used for up to two side, driver and front passenger airbag and/or belt tensioner deployments
After the third deployment, the malfunction indicator "Control module faulty" appears.

The airbag control module must be replaced:

With driver and passenger airbag deployment "but not with airbag generation 9.*, 10.* and 8.R". Refer to RESTRAINT SYSTEM PYROTECHNIC, ELECTRIC AND MECHANICAL COMPONENTS, REPLACING AFTER A COLLISION => The airbag control module with airbag generation 9.*, 10.* and 8.R. can be used for up to two side, driver and front passenger airbag and/or belt tensioner deployments .
if housing is damaged
if there is deformation on tunnel in 200 mm circumference around control module

Always replace the following:

All deployed airbag units
The Battery Interrupt Igniter -N253-

Also with front passenger airbag deployment:

Instrument Panel
Deformed front passenger module supports (cannot be reformed)
All front airbag sensors on the front end
Remaining transverse acceleration sensors if the mounting points are deformed in the sensor area

Also with driver airbag deployment:

Return Spring with Slip Ring
All front airbag sensors on the front end
Remaining transverse acceleration sensors if the mounting points are deformed in the sensor area

Also with thorax airbag deployment:

Pressure sensors on the deployed side
Transverse acceleration sensors on the deployed side
Cover
Cushion
With a folding rear seat backrest: side cushion (if equipped)
Remaining transverse acceleration sensors if the mounting points are deformed in the sensor area

Also:

All automatic belt retractors with deployed seat belt tensioners
All automatic belt retractors with deployed seat belt force limiters (depending on vehicle equipment)
Seat belt latches for all automatic belt retractors with deployed seat belt tensioners with the belt on
Seat belt height adjuster (manual and power) for all automatic belt retractors with deployed seat belt tensioners with the belt on

-- Connect the Vehicle Diagnostic Tester if there is a chance the belt tensioner and/or seat belt force limiter deployed.

-- In >>Guided Fault Finding<< under "15 - Airbag", check whether there is a crash entry in the airbag control module.

-- Also check if the "Resistance too high" error is stored for the belt tensioner and/or belt force limiter. Deployed belt tensioners and/or belt force limiters must fulfill both conditions. "Requirement: the airbag control module was not replaced yet".

TIP:

The error message "Resistance Too High" may also be stored if there is an open circuit. Then there is normally no crash entry.
Depending on the crash, the belt tensioner may have deployed while the belt force limiter did >>NOT<<. In that case, follow the disposal information for pyrotechnic components. Refer to AIRBAG, BELT TENSIONER AND BATTERY CUT-OUT UNITS, STORING, TRANSPORTING AND DISPOSING (PYROTECHNIC COMPONENTS) .
Also check the seat belts. Refer to SEAT BELTS, CHECKING .

-- If parts of the seat belt system are removed due to an accident, replace the belt system bolts.

-- If needed (visual inspection), the following must also be replaced: all faulty components.