Audi A4: Refrigerant Circuit Components, Replacing
Audi A4 (B9) 2016-2026 Service Manual / Heating, Ventilation & Air Conditioning / Refrigerant Circuit Components, Replacing
- General Information
- Leaking or Damaged Components except A/C Compressor, Reservoir or Receiver/Dryer
- Compressor, Replacing without the Need for Flushing Refrigerant Circuit
- Compressor, Replacing on Account of Leakage or Internal Damage
- Receiver/Dryer or Accumulator and Restrictor, Replacing after Cleaning Refrigerant Circuit
- A/C Compressor Regulator Valve -N280-, Removing and Installing
READ NEXT:
General Information
Vehicles with a High Voltage System (Hybrid Vehicles)
Extremely Dangerous Due to High-Voltage
The high-voltage system is under high-voltage. Death or serious
bodily injury by electric shock.
- I
Leaking or Damaged Components except A/C Compressor, Reservoir or
Receiver/Dryer
The refrigerant circuit was completely empty (for example
with larger leak or cracked hose)
Note
In the event of only a minor leak with slow escape of
refrigerant (e.g. at a small leakage
Compressor, Replacing without the Need for Flushing Refrigerant Circuit
Note
Cleaning the refrigerant circuit means flushing with
refrigerant R134a. Refer to
→ Chapter "Refrigerant Circuit, Cleaning (Flushing), with
Refrigerant R134a".
If a faulty A/C
SEE MORE:
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
1.2 Nm
3 - Front Passenger Occupant Detection Sensor -G128-
Only the front passenger side
Removin
Driver/Front Passenger Seat Adjustment Control Head -E470-/-E471-,
Removing and Installing
Special tools and workshop equipment required
Trim Removal Wedge -3409-
Removing
- Carefully pry the actuators -1 and 2-
from the retainer using the -3409-.
- Remove the seat side trim on the side sill side. Refer to
→ Chapter "Seat Side Trim on Side Sill Side, Removing and
Ins
© 2019-2026 Copyright www.audia4b9.com
