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

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

Original price was: $109.99.Current price is: $99.99.

36 ratingsSource: Amazon

Confirm quantity, package contents, selected variation, current offer details, and store terms before placing the order.

About this item

  • 【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 Modes】Resistor 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.
  • 【Widely Applications】A wide range of applications is waiting to be explored. The wideband o2 sensor gauge provides 0-5V analog and serial RS-232 output that make it perfectly compatible to get access to read and record data from controllers, meanwhile, it supports vehicle/system voltages up to 16V.
  • 【12-MONTH WARRANTY】If 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

Before you order
  • Confirm the part number, position, dimensions, and connector details shown on this page.
  • Compare the listing with the part currently installed on your vehicle.
SKU: D-B0CJHS2FWN Category:

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 Mounting

Compatible with Vehicle/System Voltages up to 16V

0-5V Analog Output

Serial RS-232 Output

20ms Typical Response

8.0:1 to 20.0:1 AFR / 0.55 to 2.00 Lambda

Configurable 3 or 4 Digit Precision Display Modes

Configurable AFR, Lambda or O2% Display Modes

Free Air or Resistor Trim Calibration Modes

Auto Dimming Feature

Gledewen Wideband UEGO Air Fuel Ratio Gauge Kit Includes:

1 * UEGO Gauge

1 * Wideband Oxygen Sensor

1 * PWR/IO Cable

1 * Sensor Harness

4 * Butt Connectors

1 * Silver Nut

1 * Installation Instruction

Usage Steps

1. 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.

Imported customer feedback

What customers reported

4.1 / 5 36 ratings

Source: Amazon. These reviews were imported from the source marketplace and are not reviews of purchases made on this website.

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

  1. Customer –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    Works great and easy to install

  2. Rob O. –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    I was skeptical but it is the real deal. Works great and as I had read before came with aem instructions

  3. Bob –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    It was working excellent at first really good accurate readings then after about a month it started acting up and I can scan through the settings but it won’t heat up or show any reading .

  4. Dave Riley –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    Worked great for 2 days then started dying. I looks like something in the gauge itself. It keeps going dark and resetting itself. Checked my power going to the gauge and it is solid. Problem is in the gauge itself. Poorly made perhaps.It did help me id a over rich condition on my car, so it wasn’t a complete loss. I leaned out the jets and my car is running better than ever.It was easy to install and when it works…it was great. I do wish it had lasted long enough to remain in my dash so I could ID issues as they arise with fuel delivery.

  5. R. Young –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    I used a slightly longer bung than provided and welded up a temporary exhaust extension for my experimental airplane to tune the carburetor. It has been a game changer, as I was running WAY too lean. With reliable data, I was able to rapidly get my engine dialed in. I’m using leaded fuel in this application, but in this temporary installation I think the heated sensor will last long enough.There are specialized tuning meters available, but I wasn’t sure this whole deal was going to work, so I went the inexpensive route to minimize financial risk, but it’s worked out great. The documentation is Just Enough for an experienced mechanic to figure out how to install it.

  6. Steve M. –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    I bought this for my 1930 Model A hotrod, I wanted to make sure that my Holley carburetor was tuned properly and not running too lean or rich, which is not good for the engine. The install was easy, and I mounted it on the steering column so I could read it without distraction. Everything in the product description was correct, and so far, it’s been functioning perfectly. The price point was within my budget, and it works just as well as higher priced units. I would recommend this AFR gauge to anyone who wants to tune their engine the easy way.

  7. Ricardo Medina –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    So far has worked over the past few months. Cammed my Yukon and worked fine with HP tuners prolink

  8. Customer –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    Only downfall is that the display was always dim. No auto bright in direct sunlight and can’t see the display.

  9. Kaphs_kcin93 –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    It’s a garbage product. I installed the sensor and wired up the gauge and it doesn’t work at all, the gauge jumps around for about 10 seconds then bottoms out at it’s lowest reading of 8.01. The buttons on the gauge face are cheap and most of the time don’t actually do anything when you press them, tried wiring it into my HP Tuner with a Pro-Link cable and there is no voltage signal. Thought maybe I got a dud and returned it and got a replacement, hooked it all up and this one doesn’t work either. I’ll get my money back from Amazon but the waste of time and effort is frustrating. Don’t be me, buy from a reputable company who makes a functional product.

  10. Axlenut –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    Love the serial output

  11. Neon –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    Hooked to my aem ecu, works as it should reads correctly as of now.

  12. Joe Butts –

    Imported from Amazon. This is not a review of a purchase made on this website.

    External marketplace context: Verified Purchase

    Works great

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Product facts

Specifications

Canonical product
MP-US-B0CJHS2FWN
Source product ID
B0CJHS2FWN
Category
Replacement Parts / Lighting & Electrical / Electrical / Gauges / Air & Fuel Ratio
Available images
8

Vehicle information

Available fitment details

Listing compatibility notes

  • Specifications: 52mm(2-1/16") Diameter Mounting Compatible with Vehicle/System Voltages up to 16V 0-5V Analog Output Serial RS-232 Output 20ms Typical Response 8.

Fitment data is provided as a buying aid. Verify the listing against your vehicle and existing part before ordering.

Exact identity, part numbers, model references, and available compatibility evidence

Buying guidance

Quick decision

An identity-first air & fuel ratio listing organized around stable product references and available compatibility evidence.

Fit and size notes

  • Match the complete identifier, side, position, connector, dimensions, and visible design with the existing part.
  • Treat uncertain vehicle notes as a buying aid, not as a confirmed fitment guarantee.

Specification notes

  • Canonical product: MP-US-B0CJHS2FWN
  • Source product ID: B0CJHS2FWN
  • Category: Replacement Parts / Lighting & Electrical / Electrical / Gauges / Air & Fuel Ratio
  • Available images: 8

Before you buy

  • Match the complete identifier, side, position, connector, dimensions, and visible design with the existing part.
  • Treat uncertain vehicle notes as a buying aid, not as a confirmed fitment guarantee.