Name: AEM X-Series Plus OBD2 Wideband AFR Gauge Kit
Brand: AEM
SKU: AEM30-0534
Price: 299.95 USD

AEM X-Series Plus OBD2 Wideband AFR Gauge Kit

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AEM X-Series Plus OBD2 Wideband AFR Gauge Kit

AEM
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SKU: AEM30-0534
Barcode: 90127994504

The AEM X-Series Wideband Gauges and X-Series Inline Controller support the 4.9LSU sensor and offer both factory calibration resistor and... Read more

Out of stock, 1-3 weeks

$329.95 $299.95

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Shipped today? Order within: Nov 14, 2026 16:00:00 -0400

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Your satisfaction is important to us. If you're not completely happy with your purchase, you may return or exchange eligible items within 15 days of receiving your order. Items must be unused, in their original packaging, and in resalable condition to qualify for a return or exchange.

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Description

The AEM X-Series Wideband Gauges and X-Series Inline Controller support the 4.9LSU sensor and offer both factory calibration resistor and free-air calibration methods, providing precise factory calibration when new and allowing free-air calibration to help correct drift as the sensor ages. AEM Wideband UEGO (Universal Exhaust Gas Oxygen) Controllers are cost-effective tuning tools that accurately monitor engine Air/Fuel Ratio (AFR). Accurate AFR data is critical for tuning because running rich can reduce power, while running too lean may cause serious engine damage. The UEGO sensor connector should not be modified because it contains a laser-etched calibrated resistor specifically matched to the sensor; modification will invalidate the sensor output. Independent testing by 360° Product Testing, reported August 31, 2015, against 17 competitor wideband UEGO controllers found the AEM X-Series Inline and X-Series Wideband UEGO AFR Gauge with 4.9LSU sensors recorded the fastest response times. Wideband UEGO sensors are wear items affected by leaded fuels, automotive fluids, particulates, mechanical or thermal shock, and unheated exposure to exhaust. Free-air calibration may correct sensor drift, but sensor replacement as part of regular vehicle maintenance is recommended; follow the instruction manual when calibrating. Display and OBDII Gasoline AFR: 8.0:1-20.0:1; Display and OBDII Lambda: .55-2.00; 0-5V Gasoline AFR: 8.5:1-18.0:1; 0-5V Lambda: .58-1.23; 0-5V E85: 5.7:1-12.0:1; 0-5V Ethanol: 5.2:1-11.0:1; 0-5V Methanol: 3.75:1-8.0:1. 0-5V outputs require wiring.

Specifications

Type: Aftermarket
Usage: Street Use & Speedway

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Returns & Delivery

When will my order be delivered?

Delivery typically takes 1–4 business days. After placing your order, you will receive an email with shipping updates, tracking information, and any additional details needed to ensure a smooth delivery process.

Can I return my product?

Orders may be returned or exchanged within 15 days of receiving the parcel, provided the items are in their original, resalable condition. Customers are responsible for return shipping costs unless the return is due to an error made by Gearhead Motoring, in which case we will cover all shipping costs. Please wait for an RMA number and return instructions before sending any item back. Items returned without an RMA will not be accepted.

What can I do if my item (or part of it) is damaged?

Damaged Shipments

If your shipment arrives damaged, whether visible upon delivery or discovered after opening the package, please follow these steps immediately:

Contact Gearhead Motoring as soon as possible and submit a damage claim at shipping@gearheadmotoring.com
Keep all original packaging materials, including the box and packing materials.
Make a list of any damaged or missing items.
Take clear photos of the damaged packaging and the affected products.
If the delivery driver cannot wait for an inspection, or does not allow you to inspect the shipment, write "SUBJECT TO INSPECTION" on the delivery receipt before signing and ask the driver to acknowledge it.

Once we receive the required information, Gearhead Motoring will work directly with the shipping carrier and arrange a pickup if necessary. Do not return any merchandise without prior written authorization and an RMA number from Gearhead Motoring.

After the returned product is received and inspected, we will notify you whether the item will be replaced, or if a refund or store credit will be issued.

Important: By signing and accepting a freight shipment, you may waive your right to file a damage claim for any damage not noted on the delivery receipt. We strongly recommend inspecting all freight shipments upon arrival, even if the outer packaging appears to be in good condition.