--- product_id: 260920770 title: "30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge" brand: "aem" price: "₨8129" currency: SCR in_stock: true reviews_count: 5 category: "Aem" url: https://www.desertcart.sc/products/260920770-30-0300-x-series-wideband-uego-afr-sensor-controller-gauge store_origin: SC region: Seychelles --- # fastest response time 52mm compact size CANbus daisy-chain up to 16 cyl 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge **Brand:** aem **Price:** ₨8129 **Availability:** ✅ In Stock ## Summary > 🚀 Tune Smarter, Drive Safer — The Ultimate Wideband Gauge for the Millennial Pro ## Quick Answers - **What is this?** 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge by aem - **How much does it cost?** ₨8129 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/260920770-30-0300-x-series-wideband-uego-afr-sensor-controller-gauge) ## Best For - aem enthusiasts ## Why This Product - Trusted aem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Meets Power:** X-Digital tech captures ultra-accurate AFR fluctuations for optimized tuning and safety. - • **Seamless Connectivity:** 0-5V, RS232, and AEMnet outputs enable advanced data logging and multi-cylinder integration. - • **Compact Yet Commanding:** 52mm diameter with ultra-slim 0.825” depth fits tight spaces without sacrificing visibility. - • **Plug & Play Confidence:** Factory calibration plus Bosch 4.9LSU sensor compatibility means rapid setup and reliable readings. - • **User-Centric Customization:** Configurable display modes, auto-dimming, and free-air calibration keep you in control effortlessly. ## Overview The AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge is a precision 52mm gauge featuring an 87% larger seven-segment display, ultra-slim profile, and advanced X-Digital wideband technology. It offers lightning-fast response times, multiple output options including CANbus for daisy-chaining up to 16 cylinders, and user-configurable displays with auto-dimming. Compatible with Bosch 4.9LSU sensors and supporting free-air calibration, it delivers reliable, factory-calibrated accuracy for optimized engine tuning across various fuels and applications. ## Description From the manufacturer AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge Description The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN 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 X-Series Wideband 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. Factory calibration resistor or free-air cal, it’s your choice!: The X-Series Wideband Gauge and X-Series Inline Controller support the popular Bosch 4.9LSU sensor and can utilize both the factory calibration resistor and free-air calibration methods**. This allows users to take advantage of the precise factory resistor calibration when a sensor is new but then allows for free-air calibrations if the user desires when the sensor ages. It’s the perfect marriage of simplicity and accuracy! Features X-Series Wideband UEGO AFR Controller Gauge were fastest responding wideband air/fuel ratio controllers in an independent test vs. 17 competitors wideband AFR controllers Includes Bosch 4.9LSU wideband UEGO sensor Factory calibrated resistor does not require free-air calibration, but technology allows for free-air calibration as sensor ages if user desires Compatible with vehicle/system voltages up to 16V 0-5V & RS232 output for data logging and feedback control, AEMnet (CANbus) for data logging and daisy-chaining multiple controllers up to 16 cylinders Can display AFR values in hundredths of % 52mm gauge diameter and slim 0.825” gauge depth Gauge cup depth only .200” deep! Auto dimming feature User configurable display via buttons on the gauge face for changing AFR values, Lambda and O2%, and 3- or 4-digit display Review: Excelente - Tengo 2 meses de uso y está funcionando perfectamente Review: Très bon produit : précis et simple d'installation - J'ai acheté cette sonde Lambda pour remplacer mon ancienne INNOVATE qui ne fonctionnait plus convenablement. Le fait que ce soit le manomètre qui centralise le faisceau d'alimentation et celui de la sonde lambda rend l'installation simple. L'appareil gère tout seul son rétroéclairage donc deux connexions en moins. Le manomètre étant peu profond il peut s'installer même là où il n'y a pas beaucoup d'espace. Mais surtout ce que j'ai apprécié c'est la rapidité de mise en service à démarrage, le calibrage déjà réalisé en usine, la précision de lecture et la fiabilité du produit. ## Features - The X-Series wideband UEGO AFR sensor controller gauge (PN 30-0300) features a modern, visually striking faceplate and new seven-segment, center display that is 87% larger than the 30-4110 AEM - 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 - 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 - Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune - When tuning an engine using wideband AFR feedback control on an inertia dyno, dead time affects the data you are looking at because it is reported in a different operating location than when it actually occurred ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0184TSI84 | | Best Sellers Rank | #23,200 in Automotive ( See Top 100 in Automotive ) #4 in Automitive Electrical Air & Fuel Ratio | | Brand | AEM | | Brand Name | AEM | | Customer Reviews | 4.6 out of 5 stars 2,117 Reviews | | Global Trade Identification Number | 00840879024437 | | Included Components | X-Series Wideband UEGO AFR Sensor Controller Gauge | | Item Type Name | Gauges | | Item Weight | 0.01 Ounces | | Item weight | 0.01 Ounces | | Manufacturer | AEM | | Material | Plastic | | Material Type | Plastic | | Model | 30-0300 | | Number of Items | 1 | | Number of Packs | 1 | | Part Interchange Info | 30-0300 | | Part Number | 30-0300 | | UPC | 840879024437 | | Unit Count | 1 Count | | Unit count | 1 Count | | Warranty Description | Warranty | ## Product Details - **Brand:** AEM - **Item weight:** 0.01 Ounces - **Material:** Plastic - **Number of Items:** 1 - **Unit count:** 1 Count ## Images ![30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - Image 1](https://m.media-amazon.com/images/I/61NZ-5-mnOL.jpg) ## Questions & Answers **Q: Is it compatible with standard hp tuners vcm scanner for data logging?** A: Yes **Q: do I need 30-0310 also or is this complete?** A: No need, the aem 30-0300 is a complete kit. The controller is in the gauge itself. **Q: Does this come with a bosch 4.9 lsu?** A: yes **Q: How do you mount this? Do i have to buy a seperate mounting device?** A: HelloWe usually mount it with this gauge pod Autometer 2204 or same oneIt sells separate https://www.amazon.com/Auto-Meter-2204-Mounting-Cup/dp/B0009RUXPG/ref=sr_1_2?ie=UTF8&qid=1491381219&sr=8-2&keywords=2204 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excelente *by S***A on 22 August 2024* Tengo 2 meses de uso y está funcionando perfectamente ### ⭐⭐⭐⭐⭐ Très bon produit : précis et simple d'installation *by F***C on 29 June 2021* J'ai acheté cette sonde Lambda pour remplacer mon ancienne INNOVATE qui ne fonctionnait plus convenablement. Le fait que ce soit le manomètre qui centralise le faisceau d'alimentation et celui de la sonde lambda rend l'installation simple. L'appareil gère tout seul son rétroéclairage donc deux connexions en moins. Le manomètre étant peu profond il peut s'installer même là où il n'y a pas beaucoup d'espace. Mais surtout ce que j'ai apprécié c'est la rapidité de mise en service à démarrage, le calibrage déjà réalisé en usine, la précision de lecture et la fiabilité du produit. ### ⭐⭐⭐⭐⭐ Aem for the win *by K***Y on 20 May 2026* No issues, straight forward install. 17 sierra ## Frequently Bought Together - AEM 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge - HP Tuners PROLINK+ Cable with Analog and CAN Bus inputs for External Sensors Using MPVI2+ and MPVI3 OBD2 Scan Tools, Cable Only - GlowShift Universal Black Single Gauge Swivel Dashboard Pod - Fits Any Make/Model - Swivels 360 Degrees - ABS Plastic - Mounts (1) 2-1/16" (52mm) Gauge to Vehicle's Dash --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sc/products/260920770-30-0300-x-series-wideband-uego-afr-sensor-controller-gauge](https://www.desertcart.sc/products/260920770-30-0300-x-series-wideband-uego-afr-sensor-controller-gauge) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-08-05*