Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBMW2001330CI CONVERTIBLE (E46) L6-3.0L (M54)REPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGDESCRIPTION AND OPERATIONAUTOMATIC RECIRCULATED-AIR CONTROL (IHKA INTEGRATED AUTOMATIC HEATING/AIR CONDITIONING)AUTOMATIC AIR RECIRCULATION SENSOR (IHKA INTEGRATED AUTOMATIC HEATING/AIR CONDITIONING)
2001 BMW 330Ci Convertible (E46) L6-3.0L (M54)
Automatic Air Recirculation Sensor (IHKA Integrated Automatic Heating/Air Conditioning)
2001 BMW 330Ci Convertible (E46) L6-3.0L (M54)SECTION Automatic Air Recirculation Sensor (IHKA Integrated Automatic Heating/Air Conditioning)
Automatic Recirculated Air Control
Automatic recirculated air control
The system assumes AUC mode by pressing the AUC/recirculated air button several times. As a result, the left and right fresh air/recirculated air flaps are closed dependent on the air quality. AUC mode is indicated by an LED in the AUC/recirculated air button.
The air quality is sensed by the AUC sensor in the engine compartment. This sensor is heated for 90 seconds after starting the vehicle. In order to avoid fogging of the windows on the inside of the vehicle, the fresh air and recirculated air flaps are forced open for a limited time during prolonged recirculated air mode. This time limit is 3 minutes in heating mode and 12 minutes in air conditioning mode. After these times have elapsed, the air supply is switched back automatically to outside air for 1 minute. AUC operation is reactivated after this 1 minute period.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.