Compact 2-Inch Diameter

The gauge uses a standard 2-inch, or approximately 52mm, housing. This common size works with many aftermarket gauge pods, dashboard panels and custom instrument clusters.

Its compact footprint makes it practical for:

• Dashboard installations
• A-pillar gauge pods
• Center-console panels
• Marine instrument panels
• Custom switch and gauge panels
• Restomod and project-car interiors

Always measure the intended mounting opening before installation. “Universal” means broadly adaptable—not that the gauge will negotiate with every dashboard on its own.

White LED Backlighting

The integrated white LED backlight illuminates the gauge for nighttime driving and operation in low-light conditions. Clear illumination makes it easier to check coolant temperature without taking unnecessary attention away from the road.

The neutral white lighting also works well with many factory dashboards and custom interiors without introducing an aggressively colored display.

Durable ABS and Stainless-Steel Construction

The housing combines ABS plastic with stainless-steel components to provide a lightweight, durable instrument suitable for everyday automotive and marine applications.

Its outer construction is designed to resist:

• Normal wear
• Scratches
• Corrosion
• Oxidation
• Vehicle vibration

For marine installations, mount the gauge where it is protected from direct water exposure. Marine compatibility does not make an electrical gauge submersible, no matter how optimistic the boat owner may be.

Universal 12V Compatibility

This water temperature gauge is designed for vehicles and equipment using a 12V DC electrical system. Potential applications include:

• Cars
• Pickup trucks
• SUVs
• Motorcycles
• Boats and marine vehicles
• RVs and caravans
• ATVs
• Tractors
• Utility vehicles
• Custom and project vehicles

Confirm available mounting depth, electrical compatibility and sensor-thread fitment before installation.

Included Temperature Sensor

The kit includes the temperature sensor needed to obtain coolant-temperature readings. Once correctly installed in a suitable cooling-system location, the sensor communicates temperature changes to the gauge.

Possible sensor locations include a compatible engine coolant passage, thermostat housing, intake manifold port or an aftermarket radiator-hose adapter.

The supplied product information does not identify the sender’s thread size. Verify the sensor thread before ordering adapters or beginning installation. Do not force a mismatched sender into an engine or adapter fitting; damaged threads and coolant leaks are not considered performance upgrades.

Why Install an Additional Water Temperature Gauge?

An aftermarket temperature gauge can provide more useful information than a factory warning light or heavily damped dashboard gauge.

It is particularly valuable for:

• Modified engines
• Towing vehicles
• Off-road vehicles
• Older cars and trucks
• Engine swaps
• Restomod projects
• Boats and marine engines
• Vehicles with questionable factory gauges
• Cooling-system troubleshooting

A gauge cannot stop an engine from overheating, but it can give the driver enough warning to shut the engine down before severe damage occurs.

If your readings begin running higher than normal, review these seven signs of a failing radiator before blaming the gauge.

Product Specifications

Package Contents

The package includes:

• One 2-inch water temperature gauge
• One temperature sensor
• Installation components
• User manual

Inventory and included fittings can change, so inspect the package before disassembling the vehicle.

Installation Notes

Professional installation is recommended when modifying a pressurized cooling system.

Before installation:

1. Disconnect the vehicle battery.
2. Allow the engine and cooling system to cool completely.
3. Confirm the sensor thread and installation location.
4. Verify that the mounting opening accepts a 52mm gauge.
5. Route wiring away from exhaust components, belts and moving parts.
6. Seal threaded cooling-system connections using a compatible method.
7. Refill and bleed the cooling system according to the vehicle manufacturer’s procedure.
8. Check for leaks before operating the vehicle normally.

Never remove a radiator cap or coolant fitting while the system is hot or pressurized.

For additional troubleshooting information, see our guide on how to deal with an overheating engine.

Frequently Asked Questions

Is this a 52mm gauge?

Yes. The housing measures approximately 2 inches, or 52mm, and is intended for standard aftermarket gauge openings and pods.

What temperature range does it display?

The gauge reads from 100°F to 250°F.

Does the gauge display Celsius?

No. This model is specified with a Fahrenheit scale.

Does it include the temperature sensor?

Yes. A temperature sensor is included with the kit.

What is the sensor thread size?

The provided specifications do not identify the thread size. Confirm it from the physical product or seller before purchasing an adapter.

Can it be used in a boat?

It is marketed for 12V automotive and marine applications. Install it where the gauge and electrical connections will be protected from direct water exposure.

Will it fit every vehicle?

No gauge literally fits every vehicle without checking. Confirm the electrical system, sender location, available mounting depth and 52mm opening before installation.

Can this gauge prevent overheating?

It monitors coolant temperature but cannot correct an overheating condition. If the reading becomes abnormally high, safely stop the vehicle and diagnose the cooling system.

What if the factory coolant-temperature reading is incorrect?

Inspect the sensor, connector, wiring and cooling system. A diagnostic trouble code such as P0116 may indicate a coolant-temperature sensor performance problem. Learn more in our P0116 coolant-temperature sensor diagnostic guide.

A Simple Upgrade for Better Engine Monitoring

The LAGWIUY universal 52mm water temperature gauge provides a straightforward way to monitor coolant temperature in a wide range of 12V vehicles. Its 100–250°F scale, white LED backlighting, included sensor and compact housing make it suitable for daily drivers, project cars, towing vehicles, boats and custom dashboards.

It will not repair a failing cooling system, but it can help you recognize the problem before the engine starts converting coolant into steam.