Passenger Safety System Components, Replacing After a Collision

Passenger Safety System Components, Replacing After a Collision

Special tools, testers and auxiliary items required

• Vehicle Diagnosis Tester

• The airbag control module can be used for up to 2 side airbag and/or belt tensioner deployments with airbag generation 8.*, except 8.R.

• The airbag control module can be used for up to two side, driver and passenger airbag and/or belt tensioner deployments with airbag generation 9.*, 10.* and 8.R.

• After the third deployment, the malfunction display "Control module defect" appears.

Airbag control module must be replaced:

• with driver and passenger airbag deployment "but not with airbag generation 9.*, 10.* and 8.R"

• After three side airbag, driver airbag, passenger airbag 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 triggered airbag units

• The battery interrupt igniter (N253)

Also with passenger airbag deployment:

• Instrument Panel

• Deformed passenger front passenger airbag unit (cannot be reformed).

• All sensors for front airbag on front end

• Remaining cross acceleration sensors if anchorage point is deformed in sensor region

Also with driver airbag deployment:

• Coil connector with slip ring

• All sensors for front airbag on front end

• Remaining cross acceleration sensors if anchorage point is deformed in sensor region

Also with side airbag deployment:

• Pressure sensors on deployed side

• Cross acceleration sensors on deployed side

• Seat cover

• Cushion

• With folding rear seat backrests: Side cushion (if present)

• Remaining cross acceleration sensors if anchorage point is deformed in sensor region

In addition:

• All belt retractors with deployed belt tensioners

• All belt retractors with deployed belt force limiters (depending on equipment)

• Seat belt latches for all automatic belt retractors with deployed seat belt tensioners

• Seat belt height adjuster (manual and power) for all automatic belt retractors with deployed seat belt tensioners

- 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 large" error is stored for the belt tensioner and/or belt force limiter. Deployed belt tensioners and/or belt force limiters must fulfill both conditions. "Prerequisite: the airbag control module was not replaced yet".

• The "Resistance too large" error may also be stored if there is an open circuit. Then there is 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 ] Airbag, Belt Tensioner and Battery Cut-Out Units, Storing, Transporting and Disposing.

• Also: Follow the seat belt inspection, refer to => [ Seat Belts, Inspecting ] Seat Belts, Inspecting.

- 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 damaged components.

- After replacing the airbag units or the control module, affix stickers (only tear-off strips) to the registration card and return the registration card to the relevant Sales Center or to the Importer for registration.