Facet 10.4027 Air Charge Temperature Sensor

Air Charge Temperature Sensor for BMW and Land Rover

Facet 10.4027 is an air charge temperature sensor for select BMW and Land Rover applications. It provides the intake air temperature signal used by the engine management system to support accurate fuel and ignition control.

Key Features

• Air charge temperature sensor for engine management input
• Direct fitment for select BMW 3 Series, 5 Series, 7 Series, X3, X5, Z3, and Land Rover Freelander applications
• Fits 2001-2006 BMW 325Ci, 330Ci, 325i, 325xi, 330i, and 330xi
• Fits 2001-2003 BMW 525i and 530i, plus 1997-2003 BMW 540i
• Facet part number 10.4027

Detailed Description

Facet 10.4027 is an air charge temperature sensor used in the intake system to report incoming air temperature to the engine control unit. That signal helps the ECU calculate the correct air-fuel mixture and timing strategy across changing operating conditions. This part number 10.4027 fits a wide range of BMW and Land Rover models, including 2001-2006 BMW 325Ci and 330Ci, 2004-2006 BMW X3, 2001-2006 BMW X5, and 2002-2005 Land Rover Freelander.

Additional coverage includes 1996-2002 BMW Z3, 1997-2001 BMW 740i, 1996-2001 BMW 740iL, 1995-2001 BMW 750iL, and several 3 Series, 5 Series, and 8 Series applications. If you are replacing a faulty intake air temperature sensor on a BMW 325i, BMW 530i, or BMW M3, Facet 10.4027 gives you a direct replacement option for the listed vehicles.

What It Helps Address

• Incorrect intake air temperature readings
• Rough idle caused by inaccurate sensor input
• Hard starting related to air temperature signal errors
• Reduced drivability from improper fuel calculation
• Check engine light conditions tied to sensor faults

Installation Notes and Tips

Confirm the connector style and sensor location against the original part before installation. Inspect the intake tract, wiring, and connector terminals for damage or contamination, since those issues can affect sensor readings. Verify fitment by year, make, and model before ordering, especially on BMW 3 Series, 5 Series, X3, X5, and Z3 applications.

Quality Assurance

Facet manufactures engine management components for replacement use, and this sensor is cataloged for the listed BMW and Land Rover applications. Part number 10.4027 is specified for direct fitment on the vehicles shown above.