Navistar, International 4352100C91 | International® Def Quality Level Sensor 10.6/15.9/25 Qls

Free same-day shipping to the lower 48 states.

1-year money back warranty.

Tank Size Fitment: It works across multiple DEF tank sizes including 10.6, 15.9, and 25 gallons (as well as 10.8, 18, and 32-gallon setups).

Engine Fits: Most commonly used on 2017–2024 International trucks running Cummins ISX15, X15, QSX15, or Navistar N13 engines.