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Item #:
13314843
AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge
Item #:
13314843
UGX 1133149
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Only 99 items left in stock.
Order now and get it around Friday, August 14
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AEM's X-Series Wideband UEGO AFR Sensor Controller Gauge is the fastest responding wideband air/fuel ratio controller in independent testing, boasting patented digital technology for unparalleled accuracy.
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What Stands Out
Wideband Accuracy
The AEM X-Series offers precise wideband air-fuel ratio monitoring, ensuring optimal engine performance and fuel efficiency for automotive enthusiasts and professional tuners.
Customizable Display
Featuring a versatile digital gauge, the AEM X-Series allows users to customize the display settings, providing real-time data in a clear, user-friendly interface that enhances monitoring.
Robust Design
Engineered for durability, the AEM X-Series gauge withstands harsh automotive environments, ensuring reliable performance and longevity, making it a dependable choice for serious racers and car builders.
Product Details
- Includes X-Series Wideband Controller Gauge, FAE UEGO Wideband Sensor, Wiring Harnesses, Black Bezel, Black AFR/Lambda Faceplate and O2 Sensor Bung;AEM's X-Series Wideband UEGO Air/Fuel Ratio Sensor Controller Gauges are built upon unique, patented 100% Digital technology (Patent 9,575,030) that makes them the fastest responding wideband air/fuel ratio controllers in independent testing*. The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN AEM 30-0300) measures 2 1/16th-inch (52mm) in diameter and features a modern, visually striking faceplate and new seven-segment center display that is 87% larger than the 30-4110 AEM Wideband Gauge's center display. This creates the perception of a larger overall gauge, but in a common 52mm size for easy mounting. Its slim depth (less than one inch overall) and ultra-slim cup depth of .200-inches dramatically increases its application base and potential mounting locations. The AEM Wideband X-Series UEGO AFR Gauge has a user configurable display via buttons on the gauge face that allows you to change AFR values for different fuels, Lambda or O2%, change the center display to three or four digits, perform a free-air calibration if desired as the sensor ages, and change the CAN message ID when linking multiple X-Series Inline Controllers or X-Series Controller Gauges. A black bezel and black dual-faced faceplate for air/fuel and Lambda are included, and an optional silver bezel with white dual-faced air/fuel and Lambda faceplate is available (PN 30-0300-ACC, sold separately). An Auto Dimming feature is included. Locking connectors ensure a positive connection between the harnesses and gauge and a new single board design adds to the new gauge's durability. The gauge includes a 0-5v and RS232 Serial Port output for feedback control and data logging, and an AEMnet (CANbus) output for data logging. AEMnet allows additional X-Series Wideband Controllers to be daisy chained together (up to 16 cylinders) for recording AFR in multiple cylinders. It supports vehicle/system voltages up to 16V, and can be used on EFI or carbureted applications, and dynamometers in applications using gasoline, methanol, ethanol, Diesel, propane, and CNG. X-DIGITAL TECHNOLOGY X-Digital wideband technology gives these controllers the ability to read and report values that other controllers do not, which can deliver more optimized engine tuning and a safer overall operating condition. The controller's high-speed digital implementation ensures no loss of signal fidelity and full transient response, making it able to identify the slightest fluctuations in AFR and output them in full value. WHY RESPONSE TIME MATTERS Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune. AEM's Wideband Controllers with X-Digital technology can reduce deadtime and improve the performance of your vehicle through more accurate AFR tuning. Deadtime is the delay between when exhaust gas composition changes and when that change is reported by the O2 sensor. While flow of exhaust gases (transport delay) can affect deadtime, it is not the only source. Often, the sensing elements response to the gas is the largest contributor to deadtime when an engine is in high RPM under load. When tuning an engine using wideband AFR feedback control on an inertia dyno, deadtime affects the data you are looking at because it is reported in a different operating location than when it actually occurred. This means with long deadtimes, whatever changes you make to the base fueling will likely be in the wrong location. This can be particularly dangerous to high compression and high-boost forced induction vehicles, and EFI systems that use feedback control to auto-tune. Reducing deadtime improves wideband feedback control, and can provide a safer, more powerful and accurate tune. AEM's Wideband Controllers with X-Series digital technology can reduce deadtime and improve the performance of your vehicle through more accurate AFR tuning.;
| Manufacturer part number | 30-0300 |
| Vehicle model | 30-0300 |
| Compatibility | Compatible with vehicle/system voltages up to 16V |
| Vehicle fitment type | Specific |
| Brand | AEM |
| Automotive parts division | Direct Replacement |
| Features | Compatible |
| Rec. use | Automotive |
| Color | Black |
| Volts | 16 V |
| Items included | X-Series Wideband Controller Gauge, FAE UEGO Wideband Sensor, Wiring Harnesses, Black Bezel, Black AFR/Lambda Faceplate and O2 Sensor Bung |
| Accessories | X-Series Wideband Controller Gauge, FAE UEGO Wideband Sensor, Wiring Harnesses, Black Bezel, Black AFR/Lambda Faceplate and O2 Sensor Bung |
| Pieces | 1 |
| Model | 30-0300 |
| Series | X-Series |
| Vehicle type | Car |
| Has written warranty | No |
| Has nrtl listing certification | N |
| Size | 2.0625" (5.2 cm) |
| Assembled product weight | 1.33 lb (600 grams) |
Who Should Buy?
-
Performance Tuners
Ideal for car enthusiasts optimizing engine performance through precise air-fuel ratio monitoring for tuning adjustments.
-
Racers
Essential for competitive racers needing accurate AFR data under varying loads and conditions to improve lap times.
-
DIY Mechanics
Great for home mechanics aiming to enhance vehicle performance or diagnose issues related to air-fuel mixtures.
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Casual Drivers
Not suited for everyday drivers who do not require advanced monitoring and tuning capabilities.
Product Description
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Customer Questions & Answers
-
Question:
What does the gauge measure?
Answer: The gauge measures the air/fuel ratio (AFR) using advanced UEGO sensor technology. -
Question:
Is this gauge easy to install in any vehicle?
Answer: Yes, its slim depth and 52mm diameter make installation easier in various mounting locations. -
Question:
Can I connect multiple controllers together?
Answer: Yes, you can daisy chain up to 16 X-Series Wideband Controllers using the AEMnet (CANbus) feature.
AEM Automotive Electrical Editorial Review
The AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge has received mixed feedback from customers, revealing both strengths and weaknesses of the product. Many users appreciate the gauge's high quality, accurate readings, and ease of installation. It has been described as a great value for the price, with one reviewer complimenting its aesthetic appeal and performance, emphasizing the stylish design as part of the X-Series lineup. Users have praised its compatibility with other automotive tools, particularly the HP Tuners ProLink products, which enhance functionality and user experience. However, the product has its drawbacks. Some customers have reported issues with gauge reliability, experiencing malfunctions such as the gauge displaying “test” instead of readings, which necessitated warranty replacements. There were also concerns about the O2 sensor degrading after a short period, with AEM's customer service reportedly not covering the sensor under warranty, leading to frustrations among users who had to bear additional costs for replacements. Overall, while the gauge delivers excellent performance and style initially, its longevity and customer support related to the components raise questions among those who value reliability. **
Customer Reviews & Ratings
23 customers ratings
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5 Star
69%
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4 Star
8%
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3 Star
0%
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2 Star
8%
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1 Star
13%
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Pros
- High quality and accurate readings
- Easy to install
- Good compatibility with other automotive tools (e.g., HP Tuners)
- Stylish design adds to the aesthetic of vehicle interiors
- Generally seen as good value for the price
Cons
- O2 sensor may fail relatively quickly and is not covered under warranty
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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Chitra
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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23 July 2026 · via Trustpilot
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UGX 1133149
Order now and get it around Friday, August 14
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 99 items left in stock.
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Features & Benefits
- Fastest responding wideband AFR controller in independent tests.
- Features patented digital technology for superior accuracy.
- User configurable display for versatile AFR monitoring.
- Compact 52mm gauge size with ultra-slim depth for easy installation.
- Includes state-of-the-art connectivity options for data logging.
- Auto dimming feature enhances visibility and usability.
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