PAI 853761 Inlet NOX Sensor | Replaces Mack 20958942 davco This air spring fits the

This air spring fits the following trailer suspensions:

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

Confirm engine serial number

Donaldson P554470

PAI 853761 Inlet NOX Sensor | Replaces Mack 20958942 davco This air spring fits theInlet (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