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AEM Universal Analog E85 Wideband Air/Fuel Gauge 5.7 to 11.9:1 (Air/Fuel)

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RRP: $325.95
$246.09 (You save $79.86)
Calculated at checkout

 Product Description


AEM  Universal Analog E85 Wideband Air/Fuel Gauge 

(Air/Fuel Ratios 5.7 to 11.9:1AFR ) w/ Interchangeable Face plates and Bezels 



Factory Packaged Product

Manufactured by AEM

• 1 Wideband Failsafe Gauge 

• All Mounting Hardware & wires

• Interchangeable Face plates and Bezels

• Anywhere in USA, CANADA, Mexico, Europe, Germany, Australia and United Kingdom




YEAR                MAKE                       MODEL                    SUBMODEL 

Universal            Universal                     Universal                    Universal


Range: 5.7~11.9 E85 AFR

Gauge Display(PN: 30-5130)/0-5V Output Gasoline values from 8.5 to 18:1 AFR

Gauge Display(PN: 30-5143)/0-5V Output E85 values from 5.7 to 11.9:1 AFR

0-5V Output Ethanol values from 5.2 to 11:1 AFR

0-5V Output Methanol values from 3.7 to 7.8: AFR

0-5V Output Lambda values from 0.58 to 1.22


A highly popular Analog-Style Wideband O2 air/fuel ratio UEGO gauge features a high-speed electric stepper motor for lightning-fast needle movement and a full 320 degrees of viewing resolution to detect even a .5 degree of change in AFR. Seven backlit colors allow you to match the lighting to most factory gauge clusters. A 52mm (2-1/16") gauge housing ensures that it will fit in most gauge pods and can be remotely mounted virtually anywhere. All AEM gauges feature a 0-5v analog output for use with data loggers and almost any engine management system.

The Analog-Style Wideband O2 air/fuel ratio UEGO gauge is a must if you want to maximize your engine's power and safety. When tuning an engine, accurate air/fuel ratio data is critical because running with too rich of an AFR can cause a loss of power, and running a lean AFR can result in serious engine damage. AEM's Analog-Style Wideband AFR UEGO gauge can quickly alert you to even a .1 change in air/fuel ratio and provide enough time to shut down an engine before damage occurs.


Interchangeable black and white faceplates included for customizing gauge appearance (digital gauges only)

Bosch 4.2 LSU wideband sensor and weld-in bung included

No free air sensor calibration required - ever

Interchangeable black and silver bezels included

Interchangeable black and white faceplates included

User-definable backlighting (Analog Only) to match most factory gauge clusters

52mm (2-1/16”) gauge housing


EM’s Analog-Style Wideband UEGO AFR Gauge is a wideband UEGO air/fuel ratio controller (AFR) and gauge in one. It unites accuracy, speed and control with an easy to read, digital LED display and sweeping LED “needle” that changes colors as AFR changes from rich to lean.

Our analog-style gauge-type controller features 320 degrees of resolution for detecting even a tenth of a point change in AFR, and has a high-speed electric stepper motor for lightning-fast needle movement. The Analog Wideband gauge also features seven (7) user-selectable back lighting colors that allow you to match it to most factory gauge clusters. As with all of our Wideband Systems, they are fast and accurate.



AEM's Wideband UEGO (Universal Exhaust Gas Oxygen, pronounced “You-Way-Go”) Controllers are powerful, cost effective tuning tools that allow users to accurately monitor the Air/Fuel Ratio (AFR) of their engine.



Accurate AFR data is critical when tuning an engine. Running rich (very low air/fuel ratio, excessive fuel) can cause a loss in power, while running too lean (very high air/fuel ratio, not enough fuel) may result in serious engine damage. Using a wideband air/fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency. AEM has a comprehensive line of highly accurate, reliable wideband air/fuel controllers that can help ensure your vehicle is optimally tuned.



Some of our competitors require that you frequently perform a free-air calibration procedure to calibrate their O2 sensors. This process involves removing the sensor from the bung while still connected to the controller device, then waving the sensor in the air so it can read atmospheric O2 levels. We use Bosch 4.2LSU sensors in our wideband controllers. Our sensors are individually laboratory-calibrated by Bosch and never require free air calibration!



No. There is a laser-etched, calibrated resistor in the sensor’s connector body. This resistor is specifically created for the exact sensor that it is attached to. Modifying this will invalidate the sensor’s output.



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NOTE: Before any ACEP part is available to the public, ACEP designs are protected by DESIGN PATENTS / PATENT PENDING. Please before you purchase any similar design confirm it was designed or manufactured by ACEP.


 Warranty Information

We make returns as quick and painless as possible. You must contact us within 14 days of receiving your item and tell us if you want an exchange or money back.

If you decide on money back we will fully refund your total amount after we receive the item.

As soon we receive the returned item we will send out the new item an adjusted payments according to type of exchange (even exchange, less total amount or greater total amount).

There is NO restocking fees, but all shipping fees for returns or exchanges are the customers' responsibility.

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