Key Features
Plug-and-Play OBDII Connectivity
Displays live data straight from your ECU, including:
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RPM
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Vehicle speed
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Coolant temp
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Intake air temp
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Throttle position
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MAP pressure
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Oxygen sensor readings
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Fuel trims
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Knock retard
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And more (varies by vehicle)
What’s in the box
- AEM (30-0311) X-Series OBDII Gauge, Black Bezel & Black Faceplate
Fast X-Series Processing
AEM’s digital controller delivers:
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Faster data refresh
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Smoother parameter transitions
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More accurate readings
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Better driver feedback
52mm Digital Display
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Bright LED numeric readouts
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Outer LED ring for visual sweep
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Black/silver bezels included
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Black & white interchangeable faces
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Slim-depth housing for tight gauge pods
Customizable Channel Selection
Rotate through multiple ECU parameters or lock the gauge to one channel.
Great for:
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Boost monitoring on factory turbo cars
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Air temp checks on heat-soaked builds
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Coolant temp protection
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Knock monitoring
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AFR cross-checking with a wideband
Diagnostic Capability
Reads:
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Standard OBD PID data
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Manufacturer-specific values (varies by platform)
Useful for diagnosing issues without a scan tool.
Why Enthusiasts Use the 30-0311
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Perfect for drivers who need real-time ECU data
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Great for catching fueling or timing problems early
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Ideal for modified turbo cars with limited factory displays
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Lets you monitor parameters OEM clusters hide
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Much faster than cheap OBD Bluetooth apps
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A clean, fixed gauge—no phones, no lag, no nonsense
This gauge is basically a compact digital dash powered by your OBD port.
Ideal For
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Factory turbo cars (Subaru, VW, EcoBoost, Toyota GR, etc.)
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Mild bolt-on builds
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Tuned cars needing extra monitoring
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Swapped vehicles that retain OBDII
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Daily drivers that need real data visibility
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Anyone who hates looking at their phone for OBD readings
Installation Notes
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Plug into OBDII port—literally that simple
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No additional wiring required unless using optional outputs
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Mount antenna and gauge in any standard 52mm location
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Works on any 1996+ OBDII vehicle (parameter availability varies)
Install time: 1–5 minutes.
Final Verdict
The AEM 30-0311 X-Series OBDII Gauge is one of the easiest and most effective ways to monitor your engine’s health and performance.
Fast, accurate, customizable, and fully plug-and-play, it turns your OBDII port into a live digital dashboard—without the lag or limitations of cheap OBD apps.
If you want real data without wiring headaches, this is the OBD gauge to run.
Planet Asphalt –
Awesome gauge to have. Easy to hook up. Easy to setup what setting u want. Super simple & clean looking. Will buy more.
Robert Bruce –
I was able to plug it into the OBD II port, just like the product said. I got it because my 2022 Volvo has no temperature gauge, which drives me nuts. This unit gives me extremely precise readings of the car’s engine coolant temperature. It also gives information on lots of other elements of the engine, but I only use it for the engine coolant temperature. I bought it with the GlowShift Universal Black Single Gauge Swivel Dashboard Pod and it all works well together (although I had to widen the hole in the pod for the very thick rubberized cord that runs from the gauge to the OBD II port).
Alex –
I bought this because I wanted to monitor AFR on my 04 Rx8. The info online was scarce. Seems most people install their own aftermarket sensors or dont even attempt to read AFR unless their car is boosted. AFR can easily detect a giant vacuum leak. Lean condition is terrible on the engine and this gauge gives me extra piece of mind that a loose rubber hose is not gonna kill my engine.The gauge itself is rather finncky. Its the only one on the market like it so you cant do much about it. It has a light sensor to dim the display; I could easily tap into the headlight circuit if they supplied a wire for that. Also it really does need constant power. The manual states they use some rules to determine whether to display the gauge or go into sleep mode. This means that if you try to add a switched power source, you lose the memory feature of being able to see the last PID when you turn your car on and off. It really doesn’t like being unplugged and seems to forget certain PID’s until some unknown car on and off cycling allows it to relearn.Overall good gauge but wish there were better options out there.
JOutterbridge –
Easy to use. Best for 2014+ cars due to more data avaliable. Instructions not included. Cord isn’t very long but can be extended. Only reads OEM PID’s which means its limited by your car manufacturer. Most cars it will read coolant temps, intake, battery volts, codes, RPM etc. Also wideband AFR, oil pressure, fuel pressure if your car stores that info. Only reads 1 thing at a time so its not a multi display. Gotta go to the vendor website for the instructions and code meanings…
Edward Bosley III –
Works perfect for my car, tells me everything I need to know. Great Product.
Rob Combs –
Figure I would try it out, rand everything and to my disappointment the gauge didn’t work. It just says obd 2 then flashes obd 2 again and goes black. Being my car is an 02 with Can OBD 2 I figured it would work just fine. No luck. So to those who buy it plug it in first run the car and make sure it works before you spend the tome doing the install.
Tyler l. –
It’s a good gauge it just didn’t work with my 2002 Silverado 2500hd, but I tried it on my dad’s 2021 Nissan Titan and it worked just fine and looked awesome, all setting working etc. Definitely bummed out but oh well Ill find another option, just wanted something to verify my gauge cluster was working right with my new cam
ThatOneGuy –
If your looking to read some obd2 this will work for you…seems like aem quality has suffered some over the years. Mine works as it should but right square in the center of the gauge there a strange (bubble?) Behind the gauge and boy do you see it on or off…. come on aem :/
Patricia Vargo –
only works on 2008 and up vehicles with can bus OBD supported computers
i use for diagnostic tool for reading and repairing bad obd codes
Mar –
Baja calidad
Lo instale en un Gti mk7 y no me marco el boost que es para lo que lo quería , y aparte a la primera limpiada con una microfibra se rayó