Original BMW AUC Air Recirculation Sensor for BMW 3, 5, 7, and 8 Series, X3, X5, and Z4 (1989–2010)

Built for BMW's automatic air recirculation control (AUC), this Original BMW sensor detects polluted air and closes the HVAC recirculation flap on a wide span of 3, 5, 7, and 8 Series, X3, X5, and Z4 models. It responds to oxidizable gases in the air flowing through the radiator. When the level crosses a set threshold, the system closes the recirculation flap. The flap stays closed for a set time after the gases clear. BMW's part name is "Sensor f. AUC." The sensor weighs 34 g (1.2 oz) and is made in Poland.

Original BMW Parts carry a 24-month parts warranty.

This number started production in April 2002 and replaces the earlier 64-11-6-924-755. BMW rates the change as exchangeable retrospectively, so this sensor also fits cars built with the earlier part. The part also cross-references to 64-11-8-391-470. BMW used one sensor across a long run of chassis. These include the E36 and E46 3 Series, the E34 and E39 5 Series, the E32 and E38 7 Series, the E31 8 Series, the E83 X3, the E53 X5, and the E85 and E86 Z4.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 64-11-6-917-001
• BMW part name: Sensor for automatic air recirculation control (AUC)
• Weight: 34 g (1.2 oz)
• Production start: April 2002
• Replaces: 64-11-6-924-755 (exchangeable retrospectively)
• Cross-reference: 64-11-8-391-470
• Country of manufacture: Poland
• Sold as: one piece
• Warranty: 24 months on Original BMW Parts

Common Questions

Will this replace the older 64-11-6-924-755 sensor?
Yes. BMW lists 64-11-6-917-001 as the replacement and rates it exchangeable retrospectively, so it fits cars built with the earlier sensor.

What does the AUC sensor do?
It detects oxidizable gases in incoming air. When the level is high enough, the system closes the HVAC recirculation flap. The flap stays closed for a set time after the gases clear.

Fitment & Compatibility

Confirm your model year and submodel against the table below before ordering. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.