5EL818900100

Also there is a FAQ page here (copy/paste):

1 x Handpiece

Fits BMW S1000XR 2014-2018

TH55 TH-55

2013-2019 Peterbilt 367 L6 11.9L Downstream Nox Sensor 5WK96741B 4326874 2872946 Skoda Car Turbo Chargers & Parts 5EL818900100Downstream Nox Sensor For Cummins ISX DIESEL 13 18 5WK96741B 4326874 2872946 Feature: 1: According to the original factory specifications,perfect match for the original car. 2: Own different test machines to design exact accurate parameter for our products. All items were tested for performance. 3: Made by high quality material, lightweight, anti rust, colorfast and durable. 4: Aftermarket product with premium quality. 5: Stable performance, high