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AEM Wideband Sensor Gauge 30-0300 X-series AFR O2 UEGO Air Fuel Ratio Gauge Kit

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US $229.98
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Condition:
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Located in: Litchfield, Illinois, United States
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eBay item number:175970332392
Last updated on Aug 29, 2025 13:40:10 PDTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
Other Part Number
AEM Gauge Kit
Type
Gauge Kit
Interchange Part Number
X-Series Gauge Kit, aem wideband sensor
Warranty
1 Year
Manufacturer Warranty
1 Year
Part
aem wideband gauge
Manufacturer
AEM
Model
aem wideband x series
Part Type
aem wideband 30-0300
UPC
0672713967163
Item Diameter
16 in
Color
Black
Manufacturer Part Number
300300
Material
Plastic
Superseded Part Number
30-4100
Vintage Part
No
California Prop 65 Warning
Cancer & Reproductive Harm
Brand
AEM
Display Type
Digital
OE/OEM Part Number
30-0300
Style
Racing
Universal Fitment
Yes
Performance Part
Yes
Category

About this product

Product Information

This AEM X-series Wideband UEGO Air Fuel Sensor Controller Gauge is mainly designed to gauge or sensor the current fuel ratio for certain vehicle models, giving a precise estimate for peace of mind. Its AF Ratio is 30-0300 and it measures 2 1/16th inches in diameter and comes in a striking black. Read and report values correctly and enjoy the very readable features of this reliable unit.

Product Identifiers

Brand
AEM
Manufacturer Part Number
300300
GTIN
0840879024437, 0672713967163
UPC
0840879024437, 0672713967163
eBay Product ID (ePID)
1349886368

Product Key Features

Performance Part
Yes
Vintage Part
No
Style
Racing
California Prop 65 Warning
Cancer & Reproductive Harm
OE/OEM Part Number
30-0300
Display Type
Digital
Color
Black
Universal Fitment
Yes
Material
Plastic
Superseded Part Number
30-4100

Dimensions

Item Width
5.400
Item Diameter
16 in
Weight
1

Item description from the seller

About this seller

Midwest Aftermarket

98.4% positive feedback150K items sold

Joined Jun 2012
Usually responds within 24 hours
Here at Midwest Aftermarket we strive for 100% customer satisfaction. Please let us know if you have any questions about any of our products. Also if you don't see a item you want in our store please ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
5.0

Seller feedback (42,858)

All ratings
Positive
Neutral
Negative
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Item as described, I had an issue with the item contacted the seller and they contacted the manufacturer and the issue was resolved. Good communication I had a remedy for the problem within ten hours which was over night super helpful. Very pleased with the service and price. Would purchase from this seller again. Thank you for all the support.
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    highly recommend this seller. post office messed up and sent package to wrong address and i messaged the seller and they were very helpful and shipped a new one out with upgraded shipping so i still got it when it was supposed to show up.
  • *****- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Good quality great condition a value purchase and Appearance was same as advertisement. Would buy again
See all feedback

Product ratings and reviews

4.9
245 product ratings
  • 229 users rated this 5 out of 5 stars
  • 11 users rated this 4 out of 5 stars
  • 2 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 3 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

  • Top favorable review

    Accurate and easy to read

    I have used both 30 & 60 psi range gauges and I will never be using any other brands boost gauges. Easy to read, even in off road applications. Comes with all needed hardware for installation.

    Verified purchase: YesCondition: NewSold by: autoshopping24.store

  • AEM 30-0300

    One of AEM's newest most recent wideband for 2018... This gauge is also on social media as 1 of top ten to choose, and I believe 2nd or 3rd in the order... I chose this for the quality of this being the first single board design and jst hobby style harnesses to plug and play to the guage... The setup is also great bc it is also a lambda and uego read on the LSU aswell... This means e85 compatible... The no obstacles that were of AEM guages of yesterday are in the past bc this opens doors for more of these guages to be standard so the harness is plug and play the guage is single board, has digital dim and blackout feature.. So many things that make this a can't go wrong choice, other than being pricey in the market; which was only thing was and I waited for a great price.. This is AEM's ...

    Verified purchase: YesCondition: NewSold by: circuitspecr

  • Peace of mind at a Glance!

    This is one of the best gauges for monitoring A/F because of the big red easy to read from a glance numbers as well as the parameter light that will definitely let you keep your eye on the road / track ahead and still catch a glimpse of the green light without actually looking directly at it. It's just in your line of site so you know your A/F is fine

    Verified purchase: YesCondition: NewSold by: spreetail

  • Awesome product

    Works great, makes logging your car with a db9 cable very easy. Worth every penny.

    Verified purchase: YesCondition: NewSold by: circuitspecr

  • Yeah boi

    I read and followed the directions for the oxygen sensor install angle and fixed any exhaust leaks. it works great and can finally fine tune my carburetor.. I found out why one of my many carbs always got horrible mileage even with very lean jetting, the idle air bleeds were about .012" too small

    Verified purchase: YesCondition: NewSold by: tsukikagesoul811

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