Emissions & Aftertreatment

Browse emissions and aftertreatment component listings, including NOx sensors, DEF pumps, EGR components and filters where available. Match the original part number and vehicle configuration. Components listed for the same engine family can vary with build details and emissions equipment.

Part selection, fitment and ordering guidance

Use the vehicle and original part identification

Provide the VIN or engine serial number, current part number and the component's position or function. Review the product's condition, included hardware and application information before ordering. Confirm a replacement or superseded number against the exact vehicle rather than relying on appearance.

Follow manufacturer diagnostics before buying; warning lights or derate symptoms can have more than one cause.
Check whether the product is a complete assembly or an individual sensor, pump, valve, filter or other component.
Use parts appropriate for the vehicle's specified emissions system and follow applicable service procedures.

Check the listing for new, used or remanufactured condition and current availability. ATP is an independent reseller, not an authorized manufacturer dealer. ATP warranty terms and return eligibility apply; manufacturer coverage is not assumed.

Request a fitment check with your vehicle and part information before ordering, or visit FAQ & Help for ordering and support guidance.