Key Features

High-Accuracy Temperature Monitoring

Perfect for:

• Engine oil

• Coolant/antifreeze

• ATF/automatic transmission

• Differential fluid

• Intake/intercooler temps

• Any 0–300°F (or higher with the correct sensor) fluid or air temp application

52mm (2-1/16”) Digital Display

• Crisp, bright temperature readout

• Sweeping LED ring for at-a-glance monitoring

• Interchangeable black/silver bezels

• Compact depth fits tight gauge pods

Fast Sensor Response

Designed for real-time data, especially critical when:

• Pushing high RPM

• Running boosted applications

• Tracking oil temp before heavy load

• Monitoring heat soak

• Watching transmission temps during towing or track runs

Analog Output for ECU / Data Logging

Outputs can be fed into:

• Standalone ECUs

• Piggyback systems

• Data loggers

• Digital dashes (AEM CD-Series)

Warning Alarms

User-programmable alerts for:

• High coolant temps

• Excessive oil temps

• ATF overheating

• Intercooler heat soak

Exactly what you want when you’d prefer your engine to stay inside the engine bay.

Why This Gauge Matters

Temperature is one of the most important—and most overlooked—metrics in protecting an engine.
The AEM 30-4402 gives you:

• Early warning before problems get expensive

• More accurate readings than factory cluster gauges

• Real data for tuning or performance upgrades

• Better insight into engine health under load

This isn’t a “nice to have.” It’s a “save your engine before it cooks itself” gauge.

Installation Notes

• 52mm standard gauge size fits most pods and mounts

• Requires a compatible AEM temperature sensor (usually 1/8” NPT thread)

• Route wiring away from headers and high-heat zones

• Calibrate/verify sensor settings based on fluid type

• Analog output requires wiring to your ECU/datalogger if used

Install time: 30–60 minutes depending on sensor location.

Final Verdict

The AEM 30-4402 Temperature Gauge is a professional-grade temperature monitoring solution for any performance or daily-driven build.
Its fast response, clean digital display, and versatile sensor integration make it one of the best ways to keep tabs on vital fluid temps—and protect your investment.

Perfect for turbo cars, track builds, towing rigs, or anyone who likes their engine to, you know… live.