Removing and installing airbag control unit J234 — AUDI
Removing and installing airbag control unit J234 on Audi: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
Removing and installing
airbag control unit
J234
Removing
WARNING
Observe safety regulations for pyrotechnic components
Chapter
.
If control unit is renewed, select
“Replacement”
function for appropriate control unit in
“Guided Fault Finding”
Vehicle diagnosis, testing and information system VAS 5051
.
With ignition switched on, disconnect battery earth wire
Rep. Gr.
27
.
Remove centre console
Chapter
.
WARNING
Before handling pyrotechnic components (e.g. unplugging the electrical connector) the mechanic must discharge static electricity by briefly touching the door striker plate, or similar.
Open retaining clip
3
at connector
4
.
Unplug connector
4
.
Unscrew nuts
2
(3x).
Take out
airbag control unit
J234
1
to left.
Installing
WARNING
Observe safety regulations for pyrotechnic components
Chapter
.
Before handling pyrotechnic components (e.g. plugging in the electrical connector) the mechanic must discharge static electricity by briefly touching the door striker plate, or similar.
Installation is carried out in the reverse order; note the following:
When installing a new
airbag control unit
J234
you must bond on a new cover
Chapter
.
Note
Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.
WARNING
The battery must be connected with the ignition switched on. If pyrotechnic components (e.g. airbag or belt tensioner) are inexpertly repaired, this may result in unwanted triggering after connecting the battery. There must not be anyone in the vehicle while you are connecting the battery.
With ignition switched on, connect battery earth wire
Rep. Gr.
27
.
Note
If
airbag warning lamp
K75
indicates a fault following installation, you must interrogate, erase and then re-interrogate the fault memory
Vehicle diagnosis, testing and information system VAS 5051
.
When the
airbag control unit
J234
has been renewed it has to be encoded via
“Guided Fault Finding”
Vehicle diagnosis, testing and information system VAS 5051
.
Tightening torque
Component
Nm
Airbag control unit
J234
to body
8
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.