PAI 853761 Inlet NOX Sensor | Replaces Mack 20958942 davco Freightliner MT45 / MT55 step-van

Freightliner MT45 / MT55 step-van and walk-in chassis

This fuel/water separator fits Davco Fuel Pro 230 series and Industrial Pro 234 housings used on:

Verify your hood bumper location and OEM number before ordering — Peterbilt uses several different hood bumper sizes at different points on the hood and front clip

0L (2004–2010)

Confirm engine serial number

PAI 853761 Inlet NOX Sensor | Replaces Mack 20958942 davco Freightliner MT45 / MT55 step-vanInlet (upstream) NOx sensor for Mack and Volvo MP D platform heavy duty diesel engines PAI 853761. Mounts upstream of the SCR catalyst and reports raw exhaust NOx to the aftertreatment ECU for closed loop DEF dosing control. The 4 pin rectangular connector, M20 1. 5 exhaust boss, and 23" overall harness length match Mack OEM 21636091 and Mack Volvo 22303390. Signs You Need a New NOx Sensor Aftertreatment fault codes referencing the upstream inlet NOx