Delphi ANS1049 Nitrogen Oxide (NOx) Sensor - Downstream

Delphi ANS1049 NOx Sensor Overview

The Delphi ANS1049 is a downstream nitrogen oxide (NOx) sensor built for emission control monitoring on select Ram heavy-duty diesel applications. It uses a 12-volt electrical design, a black oval connector, and a 4-pin male terminal layout to deliver OE-style signal accuracy for the exhaust aftertreatment system.

Fits 2011-2012 Ram 3500, downstream. This part number, ANS1049, is also referenced for the same application under Standard Ignition NOX015.

Key Features

• Downstream NOx sensor for emission control system monitoring
• 12-volt design with 4-pin male terminals
• Black oval connector with male connector and terminal gender
• Universal-or-specific fit listing with confirmed downstream placement
• Delphi OE-validated sensor calibration for accurate readings
• Wiring harness length listed at 23.246 in. and 590.4484 mm

Detailed Description

Delphi ANS1049 is engineered for downstream exhaust measurement on 2011-2012 Ram 3500 models. As a NOx sensor, it monitors nitrogen oxide levels after the exhaust treatment process, helping the vehicle’s emission control system track performance and maintain proper operation. Delphi validates its sensors to OE standards and calibrates them for accurate output, which supports consistent system feedback and fewer repeat repairs. If you are searching for a downstream NOx sensor for Ram 3500 diesel emission control service, ANS1049 is the direct fit reference to review.

What It Helps Address

• NOx sensor fault codes related to downstream exhaust monitoring
• Incorrect nitrogen oxide readings in the emission control system
• Diesel aftertreatment performance issues tied to sensor signal loss
• Check engine lights triggered by NOx sensor failure
• Drivability concerns caused by emission system data errors

Installation Notes and Tips

Confirm downstream sensor location before ordering and match the connector style, terminal count, and voltage requirements to the original unit. Inspect the harness routing and connector condition during replacement, and verify the sensor is installed in the correct exhaust position on the Ram 3500. For fitment verification, use the vehicle year, make, model, and downstream placement listed for ANS1049.

Quality Assurance

Delphi backs this sensor with OE development and product validation methods, and each sensor is tested and calibrated to OE standards for accurate readings. That level of validation supports dependable emission system data on the 2011-2012 Ram 3500 downstream application.