How does the intake air temperature sensor function and how can it be tested and replaced on Mazda Millenia?

The intake air temperature sensor is treated as a variable resistor, which changes its resistance depending on the temperature, and the computer is able to measure this change and hence detect the temperature of incoming air. This data is essential in modifying the air/fuel ratio and ignition timing parameters. To check sensor, across its two terminals, an ohmmeter is connected; readings of infinite resistance is a defective sensor. In vehicles which have a plate or cone-shaped type mass air flow meter, the sensor is built into the meter. Start the testing with disconnecting the negative battery cable and the sensor connector. Next, attachment of the ohmmeter between the sensor terminals and measurement of the resistance, and comparison with values 29.7-36.3 kohms at 77 °F (25 °C ) and 3.3-3.7 ohms at 185 °C. In case of discrepancy between the readings and the specifications then, the sensor has to be replaced. To remove, unscrew the negative battery cable and remove the sensor by removing it out of the air cleaner housing or air intake. When changing a sensor, make sure to put in a new sealing washer to the thermosensor.

Genuine Mazda Air Temperature Sensor

Ambient Air Temperature Sensor

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Mazda Air Temperature Sensor Part Number: BP4W-18-845
$66.95 MSRP: $89.29
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Product Specifications
- Other Name: Sensor, Intake Air Temperature
- Replaces: KL47-18-845
Fits the following Mazda Models:
- Miata | 1999-2005 | 10th Anniversary, Base, LS, Mazdaspeed, SE, Shinsen | 4 Cyl 1.8 L GAS
- Millenia | 1995-2002 | Base, L, S | 6 Cyl 2.3 L GAS, 6 Cyl 2.5 L GAS
- Protege | 1995-2003 | DX, ES, LX, Mazdaspeed, MP3 | 4 Cyl 1.5 L GAS, 4 Cyl 1.6 L GAS, 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS
- Protege5 | 2002-2003 | Base | 4 Cyl 2.0 L GAS
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Mazda Air Temperature Sensor Part Number: 1F20-18-845
$12.53 MSRP: $16.45
You Save: $3.92 (24%)
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Product Specifications
- Other Name: Sensor
Fits the following Mazda Models:
- B3000 | 2001-2007 | Base, DS, SE | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- B4000 | 2001-2009 | Base, DS, SE | 6 Cyl 4.0 L GAS
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Mazda Air Temperature Sensor Part Number: ZZM2-18-845
$40.69 MSRP: $54.26
You Save: $13.57 (26%)
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Product Specifications
- Other Name: Sensor, Intake Air Temperature
Fits the following Mazda Models:
- B2300 | 2001-2004, 1994-1997 | Base, SE, SX | 4 Cyl 2.3 L GAS
- B2500 | 1998-2001 | SE, SX, Troy Lee | 4 Cyl 2.5 L GAS
- B3000 | 1998-2000, 1994-1996 | Base, SE, SX, Troy Lee | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
- B4000 | 1994-2000 | Base, LE, SE, Troy Lee | 6 Cyl 4.0 L GAS
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Mazda Air Temperature Sensor Part Number: FSB9-18-845
Product Specifications
- Other Name: Sensor, Intake Air Temperature
Fits the following Mazda Models:
- 626 | 1996-2002 | DX, ES, LX | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS
- MX-6 | 1996-1997 | Base, LS, M Edition | 4 Cyl 2.0 L GAS, 6 Cyl 2.5 L GAS

Mazda Air Temperature Sensor

Every part of the car is important. Your vehicle's performance will be compromised if something goes wrong with the Mazda Air Temperature Sensor. Therefore, for your smooth driving and safety, you need regular checks and timely replacements. Whenever you need replacements, opt for genuine Mazda Air Temperature Sensors. Because they meet the manufacturer's criteria, it guarantees that replacements fit perfectly. Thus, these make better choices for people who care about driving. Why should you shop at MazdaPartsNow.com? We sell genuine Mazda Air Temperature Sensors. In our online catalog, there is a wide range of different parts. These are delivered directly from authorized Mazda dealers only so that customers can be sure of their security throughout any transaction while using our website. Furthermore, you can also quickly search for OEM parts you want because of our user-friendly site navigation. Choose us for a genuine Mazda Air Temperature Sensor that keeps your car running like new.

Mazda Air Temperature Sensor Parts and Q&A

Air Temperature Sensor
BP4W-18-845
Q: How does the intake air temperature sensor function and how can it be tested and replaced on Mazda Millenia?
A:
The intake air temperature sensor is treated as a variable resistor, which changes its resistance depending on the temperature, and the computer is able to measure this change and hence detect the temperature of incoming air. This data is essential in modifying the air/fuel ratio and ignition timing parameters. To check sensor, across its two terminals, an ohmmeter is connected; readings of infinite resistance is a defective sensor. In vehicles which have a plate or cone-shaped type mass air flow meter, the sensor is built into the meter. Start the testing with disconnecting the negative battery cable and the sensor connector. Next, attachment of the ohmmeter between the sensor terminals and measurement of the resistance, and comparison with values 29.7-36.3 kohms at 77 °F (25 °C ) and 3.3-3.7 ohms at 185 °C. In case of discrepancy between the readings and the specifications then, the sensor has to be replaced. To remove, unscrew the negative battery cable and remove the sensor by removing it out of the air cleaner housing or air intake. When changing a sensor, make sure to put in a new sealing washer to the thermosensor.