Genuine Audi A3 Intercooler

Audi A3 Intercooler Parts and Q&A

• Intercooler
  5Q0-145-803-AD
  Q: What are the removal and refitting procedures for the intercooler, and how do they differ on Audi A3?

  A:

  The intercooler is positioned in front of the cooling system radiator, with removal and refitting procedures being nearly the same for both petrol and diesel models, except for diesel engine codes BMM and BLS, which feature the air inlet at the right-hand top of the intercooler rather than the right-hand bottom. These specific engines are equipped with a charge air pressure and temperature sensor located at the air inlet. To proceed with removal and refitting, it is necessary to disconnect the wiring from the sensor, which involves the air duct connection to the left-hand side of the intercooler and the right-hand side, as well as the air duct from the Turbocharger to the intercooler.
• Intercooler
  1K0-145-803-CD
  Q: What is the function and removal process of an intercooler on Audi A3?

  A:

  The turbo models only have an intercooler which acts as an air radiator to cool pressurized, inbound air before it enters the engine. The expansion is attained when the inlet air is compressed by the turbocharger, and cooling down the air enables an increase in the effective volume to be induced into the engine, leading to higher engine power. The air that is pushed out of the turbocharger is directed into the bottom of the intercooler which is situated in the front of the car along the airflow. The hot air passes through the intercooler where it is cooled by the air that is flowing over the fins and directed into the throttle housing. To be removed the intercooler is placed in front of the radiator on the lock carrier, necessitating the radiator to be taken off in order to access it. This includes relocating the lock carrier to its Service position, opening air ducts of inlet and outlet elbows, unscrewing the screws that hold air conditioning condenser, and unscrewing of the screws holding the intercooler. Caution should be observed not to break or scratch the cooling fins in the process and the mounting rubber, and intercooler must be checked on the possibility of any damage or crack in the air hoses. Refitting entails the opposite of removing i.e. refitting the air hose clips in place so that the air flows are not leaking.