Audi A4: Seat Position Sensor
Overview - Seat Position Sensor
Note
The front passenger side is shown.

1 - Connector Coupling
- Connector station in the underbody under the seat.
2 - Bolt
3 - Front Passenger Occupant Detection Sensor -G128-
- Only the front passenger side
- Removing and installing. Refer to
→ Chapter "Front Passenger Occupant Detection Sensor -G128-, Removing
and Installing".
- Push the clips into the seat pan until they click into place.
4 - Passenger Occupant Detection Sensor Bracket
- Clipped in the seat frame.
- Removing and installing. Refer to
→ Chapter "Front Passenger Occupant Detection Sensor -G128-, Removing
and Installing".
5 - Wiring Harness
- Clipped in the seat frame.
6 - Connector Coupling
7 - Seat Rail
8 - Seat Position Sensor
- Driver Seat Position Sensor -G553-
- Front Passenger Seat Position Sensor -G554-
- Removing and installing. Refer to
→ Chapter "Seat Position Sensor, Removing and Installing".
9 - Bolt
10 - Connector Coupling
- For the Passenger Occupant Detection System Control Module -J706-
- Only the front passenger side
11 - Passenger Occupant Detection System Control Module -J706-
Caution
Risk of malfunction.
Never disconnect the connector between the Front Passenger
Occupant Detection Sensor -G128- and the Passenger Occupant
Detection System Control Module -J706-.
- Clipped in the storage compartment.
Seat Position Sensor, Removing and Installing
The seat position sensor is available as a replacement part with
the wiring harness and connector. The following wires with
connectors are contained in the wiring harness:
- Driver Seat Position Sensor -G553-: wire with connector for seat
belt latch connection.
- Front Passenger Seat Position Sensor -G554-: wire with connector
for seat belt latch connection, passenger occupant detection
sensor and passenger occupant detection system control module
(market-specific).
Removing
- Disconnect the modular wiring routing. Refer to
→ Chapter "Modular Wiring Routing, Disconnecting and Connecting".
- Open the corrugated tube, remove the wire for the Driver Seat
Position Sensor -G553-/ Front Passenger Seat Position Sensor
-G554- with the connector and free up.
- Remove the bolt -2-.
- Unclip and disengage the seat position sensor
-1- for the seat pan lower frame
-3--arrow-.
- Remove the cable ties or cable clips for the wire on the seat
pan lower frame.

Driver Seat
- Free up the connector -3- for the
seat belt latch and disconnect.
- Remove the seat position sensor -1-
with the wire -2-.

Front Passenger Seat
- Free up the connector -1- for the
seat belt latch and disconnect.
- Disconnect the connector -3- on the
Front Passenger Occupant Detection Sensor -G128-.
- Remove the seat position sensor -4-
with the wire -2-.

Installing
Install in reverse order of removal.
Installation instructions: For example tightening
specifications, replacing components. Refer to
→ Chapter "Overview - Seat Position Sensor".
READ NEXT:
Front Passenger Occupant Detection Sensor -G128-, Removing and Installing
Note
The passenger occupant detection sensor is only installed in the
front passenger seat.
Removing
- Unscrew t
Overview - Pedestrian Protection
1 - Driver Side Pedestrian Protection Crash Sensor 2 -G851-/Front Passenger
Side Pedestrian Protection Crash Sensor 2 -G852-
Unit with pressure hose
Com
SEE MORE:
Overview - Antenna Systems, Sedan, USA
The antenna systems consist of window antennas, a Roof
Antenna - R216- and bumper antennas.
Window Antennas
Antenna -R11- (AM/FM1)/TV Antenna 1 -R55- (TV1) to the
Antenna Amplifier -R24- at the top of the right D-pillar
TV Antenna 2 -R56- (TV2) to the TV A
General information
WARNING
The temperature of the exhaust system is
high, both when driving and after stopping
the engine.
Never touch the exhaust tail pipes once they
have become hot. This could result in burns.
Do not park your vehicle over flammable
materials such as grass or leaves because