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Ignitions and Electrical› Wiring Components

GM /

Ambient Air Temperature Sensor

$34.99 $31.25 Save $3.74

SKU: IAT-Sensor

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Easy — 1–2 hours

Overview

Its open element construction ensures durability in harsh engine compartment environments. This sensor uses the common GM calibration, making it compatible with most aftermarket engine management systems, including MegaSquirt and MS3Pro, for easy integration.

This sensor is typically used to measure ambient air or manifold air temperatures. It features a 3/8″ NPT thread size and a standard 2-wire connection for signal and ground. The resistance range is characteristic of a GM-style thermistor, with values like 3400 ohms at 70°F and 300 ohms at 210°F.
Show original supplier description
The GM Open Element IAT Temperature Sensor is a GM-style sensor built for reliable air temperature measurement in demanding automotive settings. Its open element design enhances durability, making it suitable for engine compartments. This sensor is compatible with a wide range of aftermarket engine management systems, such as MegaSquirt, MS3Pro, and MSPNP. It is versatile enough to measure temperatures in both coolant and air intake systems and utilizes the common GM calibration for straightforward integration with most tuning software. Key specifications include a 3/8″ NPT thread size, a standard 2-wire connection (signal and ground), and a GM-style thermistor resistance range (300 ohms at 210°F, 3400 ohms at 70°F). Calibration data is provided for three-point curve adjustments, including values like 100700 Ohms at -40°F, 2238 Ohms at 87°F, and 177 Ohms at 146°F. An important installation note: the connector pins are pull-to-seat, meaning they cannot be pushed in from the back. Options are available for sensor only, sensor with pigtail, or sensor with connector and pins.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGM /
Part NumberIAT-Sensor
CategoryIgnitions and Electrical

Videos

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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