AEM X-Series

X-Series Inline Wideband Controller with Bosch 4.9LSU Sensor

$211.95

SKU: 30-0310

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The AEM X-Series Inline Wideband UEGO Controller (30-0310) provides rapid air/fuel ratio (AFR) monitoring, ideal for users who require fast response times for data logging or feedback control during tuning. Its compact and weather-resistant design includes status LEDs and a low-profile enclosure. This controller integrates a Bosch 4.9LSU wideband sensor, known for its accuracy. This unit offers versatile connectivity with outputs for 0-5V, RS232 Serial Port, and AEMnet (CANbus). The AEMnet output allows for daisy-chaining multiple controllers to monitor up to 16 cylinders. It supports system voltages up to 16V and is compatible with a wide range of fuels, including gasoline, methanol, ethanol, Diesel, propane, and CNG. Applications include EFI or carbureted systems and engine dynamometers. The X-Series Inline Controller boasts the fastest responding wideband AFR controllers in independent testing against 17 competitors. While factory calibrated, it allows for optional free-air calibration as the sensor ages. Its AFR value ranges vary by fuel type and output method, with gasoline readings from 8.5:1 to 18.0:1 (0-5V) or 8.0:1 to 20.0:1 (CANbus).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandAEM X-Series
Part Number30-0310
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy