FACET Intake Air Temperature Sensor – 10.4038

Quick Info

FACET 10.4038 is an intake air temperature (IAT) sensor used in BMW petrol and diesel engines.
Measures incoming air temperature to help the ECU control fuel delivery, boost and emissions.

Description

FACET 10.4038 is an OE-equivalent intake air temperature sensor designed for BMW engine management systems.

The sensor monitors intake air temperature and sends real-time data to the ECU for:

• Fuel correction
• Boost adjustment
• Air density calculation
• Emissions control

Used in intake manifolds and charge air systems across multiple BMW platforms.

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Fitment

Engines:

• M47 / M57
• N43 / N45 / N46
• N47
• S65 (M3)

⚠️ Fitment varies by production date and intake setup — VIN check recommended.

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Common Models

• E46 320d / 330d
• E90 / E91 320d
• E60 530d
• E87 118d / 120d
• E90 / E92 M3

 

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Part Numbers

• FACET: 10.4038
• FACET EPS: 1.994.038
• FACET KW: 494 038
• BMW OE: 13627792203

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Technical Details

• Type: Intake air temperature sensor (IAT)
• Pins: 2-pin
• Connector shape: Rectangular
• Sensor type: NTC thermistor

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Notes

• Installed in intake or charge air system
• OE-style direct replacement
• Made in Italy – OE equivalent quality

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Important

❗ Not a coolant temperature sensor
❗ Not a MAP sensor
❗ Always match connector style and OE number before ordering