Beck/Arnley 158-1221 Air Intake Temperature Sensor for Foreign Nameplate Vehicles

The Beck/Arnley 158-1221 is a direct-fit replacement air intake temperature sensor (IAT sensor) engineered specifically for foreign nameplate vehicles. This sensor monitors the temperature of incoming air entering the engine's intake system and transmits that data to the engine control module (ECM), enabling precise fuel delivery and ignition timing adjustments for optimal combustion efficiency.

Beck/Arnley specializes in foreign nameplate replacement parts, and each component in their catalog is sourced through a network of global manufacturing partners to ensure OE-equivalent form, fit, and function. This sensor replaces the original equipment unit with a part that matches the factory connector, thread pitch, and resistance characteristics — no modifications required.

Key Features:

• Meets or exceeds OEM specifications for foreign nameplate vehicles
• Direct plug-and-play replacement — no cutting or splicing required
• Precision-calibrated thermistor for accurate intake air temperature readings
• Helps the ECM optimize air/fuel mixture and ignition timing
• Constructed from premium materials for long-lasting durability
• Application-specific design ensures a correct, secure fit

A faulty air intake temperature sensor can cause poor fuel economy, rough idle, hard starting, or failed emissions tests. The Beck/Arnley 158-1221 restores accurate IAT signal input to the ECM, helping your engine run cleanly and efficiently.