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AEM Electronics UEGO X-Series Wideband Controller w/ Gauge Kit - Universal
AEM Electronics UEGO X-Series Wideband Controller w/ Gauge Kit - Universal
AEM Electronics UEGO X-Series Wideband Controller w/ Gauge Kit - Universal
AEM Electronics UEGO X-Series Wideband Controller w/ Gauge Kit - Universal

AEM Electronics UEGO X-Series Wideband Controller w/ Gauge Kit


Read 4 Reviews | 2 Q&As
Part # 30-0300
msrp: $257.96

In stock!
Universal part

Features & Product Details

When it's time to get a new wideband O2 meter, or to replace your current wideband, then you might be pretty happy with the new AEM X-Series UGEO Wideband Controller Gauge. Wideband gauges should become standard in turbocharged vehicles because they produce a value (AFR) to let the driver know that they are running on a proper tune. Over time, things such as a boost leak, vacuum leak, malfunctioned components, or a bad tune can cause your vehicle to run lean or rich under boost. If you're running lean under boost then your motor won't last much longer. But this wideband is not just limited to turbocharged vehicles, it can be used on normally aspirated applications that could be making substantial amounts of power through bolt-ons. 

The X-Series gauge uses the latest in patent-pending digital technology to deliver faster response time with AFR readings. This wideband gauge features a weather resistant low-profile gauge that responds quickly to allow tuners to optimize on tunability. And because of the gauge's high-speed digital implementation, it ensures that there will be no loss of signal and response which is very important for a solid tune. 

Everything will be included with this gauge to make it ready for installation which includes the Bosch 4.9LSU UEGO sensor, along with the appropriate contoller and wiring. A bung provision is also provided for the user to have welded onto their preferred location. 


Brand: AEM Electronics
Gauge Backlight Color: Red LED
Gauge Face Color: Black
Gauge Needle Color: Red LED Display
Gauge Range: 7.4:1 - 22.4:1
Gauge Sending Unit: Electrical
Gauge Size: 52mm
Gauge Type: Air Fuel
Requires Control Unit: No
Sensor Thread Pitch: Standard O2
Wideband Sensor Type: Bosch
Mfgr. Warranty: 1 Year
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
WARNING: Cancer and Reproductive Harm -



4 Reviews
4.3 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Customer Photos and Videos
No user media. You can upload a photo or video of your install by posting a review.
Good 9 months ago
4out of 5stars

Great wideband and very easy to install.
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2 of 2 people found the following review helpful
Works as intended 2 years ago
3out of 5stars

Special thanks to RSD chat folks! They helped me get this and other items in promptly! If you're like most people and don't like paying lots of cash for dyno tuning sessions every time there's a car mod, this is a MUST have for your Subie. This will allow for good e-tuning, which is a good alternative to paying $600+ for a dyno tune session when all you're adding is an intake (for instance). I had mine professionally installed so it feeds AFR to the car's wiring harness, so it can be easily logged via Cobb Access Port (version 3 ONLY). Here's the link for the setup if anyone is curious or interested: This item is somewhat overpriced. There are other brands that have the same specs and lot cheaper. That being said, it comes with all hardware for the installation. Last, this gauge is NOT COMPATIBLE with the SMY ClusterMaker Dual Gauge Pod 52mm (SMY SMYCLSTR1). If you get this gauge, I strongly suggest getting a different gauge pod than SMY. The SMY is very popular because it looks OEM, but the MAJOR design flaw is that the only thing holding the wideband in place is a piece of rubber band!! It easily pops off because the way the AEM wideband is designed. I'm very unhappy about how mine fit (it looks great), BUT it continuously pops off as driving over bumpy roads because the only thing holding in place is a piece of rubber band.
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2 of 3 people found the following review helpful
Easy Install 04 WRX 2 years ago
5out of 5stars

Love this gauge. It was an easy install and keeps my engine safe.
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2 of 2 people found the following review helpful
wish i would have bought sooner 2 years ago
5out of 5stars

i had been putting off getting a wideband due to thinking install would be complicated but i finally jumped the gun. THIS IS BY FAR THE EASIEST THING I HAVE EVER INSTALLED. If you plan to run the gauge standalone ( not hooking up to any aftermarket ecu/tuner) you literally just need 12v power and ground, pop the sensor in, snake some wires, and your set. looks quality, and works amazing, i highly recommend this to anyone considering a wideband, super easy install and mad benefits of having one.
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  • Q: Pod for gauge  James2 years ago

    Will this AFR gauge fit securely into the "SMY Clustermaker 52mm Defroster Gauge Vent Pod"
  • Q: wideband  Duarte20143 years ago

    what is the difference between this wideband controller and the 4.9 version, besides price?
    • 0 of 0 people found the following answer helpful

      A:  Basically from the description, this gauge is going to be quicker and more accurate then most AFR gauges.

      Tyler A. @ RallySport Direct 3 years ago  
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This Part Fits

Universal Product
This item is non application specific.
Please verify compatibility before purchase. May require some modification for proper installation.