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AEM X-Series Wideband Gauge A/F AF O2 Air Fuel Ratio comes with Sensor 30-0300

New FAE Sensor! USPS Priority Mail Shipping!
Real Street Performance Sales
(39844)
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US $196.15
Condition:
New
More than 10 available1,007 sold

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US $18.89 UPS Ground.
Located in: Sanford, Florida, United States
Delivery:
Estimated between Sat, Nov 22 and Wed, Nov 26 to 94104
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eBay item number:273113370392
Last updated on Nov 19, 2025 21:31:26 PSTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ...
MPN
30-0300
UPC
840879024437
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Superseded Part Number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
Country of Origin
United States
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Superseded Part Number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
Country of Origin
United States

Dimensions

Item Diameter
16 in
Weight
1

Item description from the seller

About this seller

Real Street Performance Sales

99.8% positive feedback•166K items sold

Joined May 2005
Usually responds within 24 hours
Real Street Performance is a full-service shop and parts distribution company that strives to provide our customers with the best products and service in the market. With over 15 years in the ...
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Detailed seller ratings

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

Popular categories from this store

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ACL BearingsACT ClutchAEM ElectronicsAEM IntakesAeromotiveAFEAIRAID IntakesAMS PerformanceApexi

Seller feedback (43,395)

All ratingsselected
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  • a***6 (7)- Feedback left by buyer.
    Past year
    Verified purchase
    Fast shipping! The items arrived exactly as described—brand new and in perfect condition. AEM never disappoints with their high - quality products, and it was a nice surprise to receive some cool merchandise along with my order. Thanks for the great support!
  • u***0 (702)- Feedback left by buyer.
    Past year
    Verified purchase
    Great tanks
  • e***y (100)- Feedback left by buyer.
    Past year
    Verified purchase
    Fast shipping and good product! A+++
See all feedback

Product ratings and reviews

Learn more
4.9
248 product ratings
  • 231 users rated this 5 out of 5 stars
  • 12 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

See all 164 reviews
  • by tonyrt44
    Sep 16, 2021Top 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

  • by berry052
    Oct 31, 2018

    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

  • by dysan911
    Dec 31, 2018

    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

  • by travibaker-gome-0
    Oct 20, 2018

    Awesome product

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

    Verified purchase: YesCondition: NewSold by: circuitspecr

  • by okevin212
    May 08, 2020

    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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