Audi A4: Battery Interrupt Igniter
Overview - Battery Interrupt Igniter

1 - Connector
- For the Battery Interrupt Igniter -N253-
2 - Nuts
- Tightening specification. Refer to
→ Electrical Equipment; Rep. Gr.97; Relay Panels, Fuse Panels, E-Boxes;
Component Location Overview - Relay Panels, Fuse Panels, E-Boxes.
3 - Battery Interrupt Igniter -N253-
- Available only together with -4-
4 - Main Fuse Panel to Battery
- Removing and installing. Refer to
→ Electrical Equipment; Rep. Gr.97; Relay Panels, Fuse Panels, E-Boxes;
Component Location Overview - Relay Panels, Fuse Panels, E-Boxes.
5 - Cover
6 - Positive Terminal Clamp
- Tightening specification. Refer to
→ Electrical Equipment; Rep. Gr.27; Battery; Overview - Battery.
Battery Interrupt Igniter, Removing and Installing
WARNING
Risk of injury due to involuntary deployment.
- Pay attention to the safety precautions when working
with pyrotechnic components. Refer to
→ Chapter "Safety Precautions when Working with
Pyrotechnic Components".
- Observe the disposal regulations for pyrotechnical
components. Refer to
→ Chapter "Airbag, Belt Tensioner and Battery Cut-Out
Units, Storing, Transporting and Disposing (Pyrotechnic
Components)".
Note
- If the Airbag Indicator Lamp -K75- turns on after a collision,
check whether crash data is stored using the Vehicle Diagnostic
Tester. If this is the case, check if the malfunction
"Resistance too high" for the
Battery Interrupt Igniter -N253- is stored in the DTC memory. If
this is the case, the Battery Interrupt Igniter -N253- must be
replaced.
- The Battery Interrupt Igniter -N253- interrupts the electrical
circuit each time an airbag is deployed. The Battery Interrupt
Igniter -N253- must be replaced after a deployment.
- The Battery Interrupt Igniter -N253- is only available as a
replacement part with the main fuse panel on the battery.
Main fuse panel on battery, removing and installing. Refer to
→ Electrical Equipment; Rep. Gr.97; Relay Panels, Fuse Panels,
E-Boxes; Component Location Overview - Relay Panels, Fuse
Panels, E-Boxes.
READ NEXT:
Overview - Driver Side Airbag
1 - Wiring Harness
For Driver Airbag Igniter -N95- and Driver Airbag Release Valve Igniter
-N490-
Replacing. Refer to
→ Chapter "Airbag Connector,
Overview - Front Passenger Airbag
1 - Connector
For Front Passenger Airbag Igniter 2 -N132-
2 - Connector
For Front Passenger Airbag Release Valve Igniter -N491-
3 -&nb
Overview - Front Thorax Airbag
1 - Front Thorax Airbag
With
Driver Thorax Airbag Igniter -N199-
Front Passenger Thorax Airbag Igniter -N200-
WARNING
Risk of injury due to in
SEE MORE:
Operating the pa mic glass roof and
roof sunshade
Applies to: vehicles with panoramic glass roof and roof sunshade
Fig. 41 Headliner: panoramic glass roof and sunshade*
buttons
The control buttons are equipped with a twostage
function.
When tilting or opening the roof, the roof sunshade
will open
Wheel alignment must only performed using VW/Audi-approved
alignment equipment.
Each time wheels are aligned, both front and rear wheels
must be aligned. Otherwise, the correct driving handling of the
vehicle cannot be ensured.
Note
Axle alignment should not be performed until the vehic