We’ve added the most comprehensive aftertreatment warranty in the industry to our already extensive list of warranty offerings.

This extended coverage plan is provided by National Truck Protection and includes coverage on 42 vital system components for both medium and heavy duty diesel engines. We have plans available for 6, 12, 24, 36 and 48 months.

The complexity of modern emission control systems has contributed to the overall cost of diesel engines and has consequently created significant interest among used truck buyers. Extending your service contract with an NTP aftertreatment warranty can dramatically reduce the burden of unforeseen expenses. Adding this option significantly expands the range of warranty coverage through the emission control system and provides additional security and assurance to Arrow customers.


  • Back Pressure Control Valve (BPV) - Regen Valve & Control Cylinder
  • Diesel Exhaust Fluid (DEF):
    • Tank
    • Dosing Module - Wiring Harness
    • Dosing Module with Injection Nozzle
    • Heated Lines (3)
    • Heater Control Relay
    • Heater Coolant Control Valve
    • Heating Elements
    • Heating Fittings (3 on Supply Module)
    • Pump Module
    • Solution Level/Temperature Sensor
  • Diesel Oxidation Catalyst (DOC)
  • Diesel Particulate Filter (DPF):
    • Air/Fuel Injectors (Hydrocarbon Doser Injector)
    • Air/Fuel Injectors Air, Fuel & Coolant Lines (Hydrocarbon Doser Lines Supplies with Engine)
    • Air/Fuel Manifold Assembly Air
  • Fuel & Coolant Lines (Fuel/Air Shutoff Valve)
  • EGR (Exhaust Gas Recirculation):
    • Control Valve
    • Connecting Bellows & Clamps
    • Cooler
  • Electronic Control Modules (ECU); After-treatment ECM and DEF Dosing ECM
  • Exhaust Piping, Clamps & Gaskets (Piping from cobra pipe after turbo to inlet of SCR excluding Decomp Pipe)
  • Exhaust Throttle Valve (DPF Doser and BPV Valve)
  • Fuel and Coolant Lines
  • Hydrocarbon Doser Valve:
    • Air
    • Inline Air Filter
    • Hydrocarbon Doser Valve (Voss Valve)
  • Selective Catalytic Reduction (SCR):
    • Catalyst
    • Decomposition Pipe
    • Decomposition Pipe Elbows


  • Delta P (DPF Pressure Sensor)
  • DOC (pre and post) Temperature
  • Diesel Paticulate Filter (DPF):
    • Air Supply Pressure
    • Backpressure
    • Fuel Pressure
    • Pressure
  • Lambda
  • NOx
  • Pressure After Exhaust Throttle Valve (After BPV)
  • SCR Post – Temperature
  • SCR Pre – Temperature and Wiring Harness for Emission System

See actual contract for full details on coverage, exclusions and limitations. Information provided is subject to change without notice. Arrow Truck Sales is not responsible for typographic errors. Ask a Sales Associate or F&I Manager for details.