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Gledewen

30-0300 Wideband UGEO Air Fuel Ratio Gauge 52mm(2-1/16"), AFR/Lambda Controller Kit with LSU 4.9 Sensor

  • Based on 167 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Oct 26
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Features

  • What A Easy Helper! Featuring sweeping 24-color-coded LED display and four-digit central readout, the faceplate of wideband gauge is two-sided and reversible. Thanks to it, the afr gauge can switch between 3 display modes of air-fuel-ratio, lambda, oxygen percentage at will, by that means you are able to effectively but quickly monitor your vehicle's conditions.
  • Core Technology To maximize your engine's power while stay safe, an air fuel ratio gauge kit is must-have! The Gledewen AFR gauge helps to identify sensitively every slight fluctuations of air-fuel ratio and report precise and reliable reference to the car engine in real-time, and in particular it matches with LSU4.9 UEGO, ensuring its faster and more precise response(20ms typical).
  • TWO Calibration ModesResistor Trim Mode(rCAL) or Free Air Mode(ACAL)? It is up to you! The supplied UEGO sensor is factory calibrated via a trim resistor, integral to the sensor connector, and rCAL is the recommended calibration mode for best accuracy, for most users, there is no further action or calibration required.
  • Installation InstructionsMount the 52mm gauge, connect power and ground wires, and install the LSU 4.9 sensor into the exhaust bung for quick setup.
  • 12-MONTH WARRANTYIf the wideband AFR sensor controller gauge kit fails, stops working or any other problems, you can rely on our service of carefree REPLACEMENT or REFUND

Description

The UEGO gauge will indicate changes in the air/fuel ratio in real time, which is essential when you aim to perform safer, more powerful and accurate engine tuning.Specifications:52mm(2-1/16") Diameter MountingCompatible with Vehicle/System Voltages up to 16V0-5V Analog OutputSerial RS-232 Output20ms Typical Response8.0:1 to 20.0:1 AFR / 0.55 to 2.00 LambdaConfigurable 3 or 4 Digit Precision Display ModesConfigurable AFR, Lambda or O2% Display ModesFree Air or Resistor Trim Calibration ModesAuto Dimming FeatureGledewen Wideband UEGO Air Fuel Ratio Gauge Kit Includes:1 UEGO Gauge1 Wideband Oxygen Sensor1 PWR/IO Cable1 Sensor Harness4 Butt Connectors1 Silver Nut1 Installation InstructionUsage Steps1. Connect Harness A to Port A.2. Connect Harness B to Port B.3. Connect the other end of Harness B to the sensor.4. The other end of Harness A has a red wire for the positive terminal and a black wire for the negative terminal.5. Connect to a 12V power supply. The instrument will start working, with a working voltage of 12V.6. The dashboard has a setting and selection button, allowing for 8 function switches.7. In the 4-digit mode, press the left button to switch to the 3-digit mode. Press the select button to confirm, which will change to 3-digit mode. Keep pressing to switch to the initialization mode or air-fuel ratio mode.8. Change to CAN mode for engine combustion ratio calibration and adjustment. This can increase the combustion ratio and improve engine efficiency.

Brand: Gledewen


Item dimensions L x W x H: 5.32 x 5.32 x 5.32 inches


Material: Ceramic, Stainless Steel


Item Weight: 1.2 pounds


Style: Modern


Maximum Supply Voltage: 16 volts_of_direct_current


Measurement Accuracy: ±1%


Measuring Range: 0.55 to 2.00 Lambda


Mounting Type: Flange Mount


Output Type: Analog


Response Time: 20 milliseconds


Specific Uses For Product: vehicle and engine performance optimization


Material Type: Ceramic, Stainless Steel


Style Name: Modern


Item Dimensions: 5.32 x 5.32 x 5.32 inches


Item Weight: 1.2 pounds


Brand Name: Gledewen


Model: A1417


Number of Items: 1


Number of Packs: 1


Manufacturer: Gledewen


Included Components: Air Fuel Ratio Lambda Gauge, Wideband LSU 4.9 O2 Oxygen Sensor


Part Number: A1417


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Seems accurate and reliable!
I installed the 30-0300 Wideband UEGO Air Fuel Ratio Gauge 52mm (2-1/16") AFR/Lambda Controller Kit with LSU 4.9 Sensor on my 1996 Honda Civic, and it has been a great upgrade for monitoring air/fuel ratios. The gauge is bright, easy to read, and responds quickly, which makes it very helpful for tuning and keeping an eye on engine performance. The Bosch LSU 4.9 sensor seems accurate and reliable, and I like that the gauge can display AFR, lambda, or oxygen percentage depending on what you want to monitor. Installation was fairly straightforward as long as you have a good location for the sensor and a plan for wiring. Once everything was installed, it worked well and gave me much more confidence when checking how the engine was running. Overall, this kit offers solid performance, useful features, and good value—especially for anyone upgrading or tuning an older Honda like a 1996 Civic. ... show more
Reviewed in the United States on May 13, 2026 by D&E
    • No quality different from name brands but 1/4 the cost
Awsome for the price I had a AFM gage go out and replaced it with this, easy to wire up and ready accurately and is honestly cheaper than just the replacement o2 sensor, amazing for the price will use this again if needed in other builds
Reviewed in the United States on July 13, 2026 by Barret
    • This is what I wanted for a good price
Appears to work correctly. Easy to install.
Reviewed in the United States on August 16, 2026 by Car Guy
    • Don't buy. Mine lasted 1 day before the sensor crapped out.
I wouldn't buy this. Spend the extra $100 and get yourself an AEM gauge. This gauge seemed to work for 1 day. The second day the afr was all over the place from 10-1 to full lean showing dashes. I am returning this and installing a genuine AEM for $200.
Reviewed in the United States on August 9, 2026 by tom
    • Good quality budget guage
It actually is accurate and worth the money. I wasn't sure what to expect but it's a decent quality product if ypu just need something to tune in a carb. It comes calibrated and accurate. Easy to install.
Reviewed in the United States on June 16, 2026 by Jake
    • What a tool
You get what you pay for. This unit as far pricing was concerned was low end of the middle. In my situation I didn't want to spend the money for the top end name brand gauges. except for the sensor bung installation the installation was really easy. It turned out there was a problem with the unit and I don't have enough experience to say for sure whether it was the sensor or controller or both. I had ask for a replacement, it just wasn't giving good data. That part of transaction could have been rated a 5. I received a new complete unit in 2 days of initiating the claim. The new one performed as it should and gave back good data. Between the AFR gauge and my in dash vacuum gauge I've been able to really start dialing in my old Holley 2300. What a tool to have at your disposal. No more guessing, hard accurate data. My vehicle has never performed so well and my gas mileage is up. I'm not done yet but the results so far are great. I consider this money well spent. ... show more
Reviewed in the United States on July 17, 2026 by Ted
    • Ok So Far
Working ok so far. No issues.
Reviewed in the United States on July 10, 2026 by donovan montague
    • Malfunction fuel ratio wideband
Right from the get go. It started malfunctioning. It would turn on and then shut off and then turn back on. Check all the connections and reconnected and still same. I also purchased another 02 sensor thinking it was mis reading it. same , cuts off and truns back on misreading air fuel ratio.
Reviewed in the United States on September 10, 2026 by Luisjr62

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