2 in 1 Racing Gauge 52mm Digital Car Gauge AFR with Narrowband O2 Oxygen Sensor Air Fuel Ratio Gauge for 12V Car Voltmeter

Keep your engine running at its peak with this 2-in-1 digital gauge. It combines an air-fuel ratio (AFR) monitor with a voltmeter in a single 52mm housing. Designed for 12V gasoline vehicles, this tool gives you real-time data to help you tune and protect your engine.

This gauge uses a narrowband O2 sensor to measure the air-fuel mixture in your exhaust. The digital display shows you if your engine is running lean or rich. It also works as a voltmeter, so you can keep an eye on your car's electrical system. The universal 52mm size fits most standard gauge pods and holders.

The black plastic housing has a clean racing look that matches many dashboards. It connects directly to your vehicle's 12V system and O2 sensor wiring. This is a practical tool for anyone who wants to monitor engine health and performance without a complex setup.

Key Features and Benefits

- 2-in-1 design that combines an air-fuel ratio gauge and a voltmeter, saving dashboard space and giving you two critical readings from one unit.

• 52mm / 2-inch diameter that fits standard gauge pods and holders, making installation straightforward in most cars, trucks, or motorcycles.

• Narrowband O2 sensor included for accurate AFR readings, helping you tune your carburetor or fuel injection for optimal performance.

• 12V DC operation that works with most gasoline vehicle electrical systems, so you can monitor battery voltage and charging output.

• Durable plastic shell construction that resists daily wear and keeps the gauge looking good on your dashboard.

• Racing-style black housing that adds a sporty look to your interior without being flashy.

Who Is This For

- Car enthusiasts who want to monitor their air-fuel ratio for tuning or troubleshooting.

• DIY mechanics installing aftermarket gauges in their project cars or trucks.

• Motorcycle owners with 12V systems who need a compact, universal gauge.

• Anyone with a gasoline engine who wants to keep an eye on both fuel mixture and battery voltage.

Usage Scenario

Mike just finished rebuilding the carburetor on his classic pickup truck. He wanted to make sure the engine wasn't running too lean, which could cause damage. He installed this gauge in his dash, connected the sensor to the exhaust, and watched the digital display. Within minutes, he saw the AFR reading and adjusted the mixture screws until the display showed a safe range. Now he drives with confidence, knowing his engine is running right.

Micro Comparison

Many AFR gauges only show air-fuel ratio and require a separate voltmeter pod. This unit combines both functions in one housing, saving you money and dashboard space. The included narrowband O2 sensor means you don't need to buy extra parts to get started. It is a simple, reliable choice for basic engine monitoring.

Specifications

Material: Plastic Shell

Diameter: 52mm / 2 in

Voltage: DC 12V

Color: Black

Item Weight: 350 g / 12.3 oz

Placement on Vehicle: Front

Package Includes

1x Air Fuel Ratio Gauge

1x Sensor

Why You Will Love It

Having both an AFR gauge and a voltmeter in one compact unit makes your dashboard cleaner and your life easier. You get immediate feedback on your engine's condition without guessing. It is a simple upgrade that helps you drive smarter and protect your investment.

Questions and Answers

Question: Does this gauge work with diesel engines?

Answer: No, this gauge is designed for 12V gasoline engines only. It uses a narrowband O2 sensor that measures exhaust from gasoline combustion.

Question: What size hole do I need to mount this gauge?

Answer: You need a 52mm / 2-inch diameter hole or a standard 52mm gauge pod holder.

Question: Is the sensor included in the package?

Answer: Yes, one narrowband O2 sensor is included with the gauge.

Question: Can I use this gauge to tune my engine for racing?

Answer: Yes, the AFR reading helps you adjust your fuel mixture for better performance. It is a useful tool for tuning carburetors and fuel injection systems.

Question: Does this gauge come with installation instructions?

Answer: The gauge includes basic wiring guidelines. You should have some experience with automotive electrical systems for proper installation.