With SCR / XAL= Selective Catalytic Reduction (UREA)
For Catalyst 
no. 5 on the second photo
RAM 1500 DS DX 3.0 CRD 2014-2019
OEM# 05146662AB, 05146662AC, 05146662AD, 5146662AB, 5146662AC, 5146662AD, 68277008AA
Item Specifications:
Sensor Type: Exhaust Temperature Sensor
Interchange Part Number: 82.1026, 82.1026A2, 7452131, 7452131A1, 7452131E, 12131, 12131A1, 12131E, 3HTS0325, 3HTS0481, 82.1026, 82.1026A2, 273-10332, 273-20395, 411420221, 411421018, 411421019
Number of Sensors: 1
Manufacturer Part Number: 8CHEGT, ESS/DS/002A
Reference OE/OEM Number: 05146662AB, 05146662AC, 05146662AD, 5146662AB, 5146662AC, 5146662AD, 68277008AA
Cable Length [mm: 130
Number of Pins: 2
Shape: Straight
Overall Length [mm: 300
Brand: NTY
Manufacturer Warranty: 1 Year