Available on the Cummins Natural Gas L9N and B6.7N school bus engines in the United States and Canada.

School Bus Coverage includes:

• Registered parts and labor
• Engine coverage includes EGR components (CWF)
• Engine coverage includes EGR components, excluding all maintenance components and accessories which bear the name of another company (CWB)
  • Maintenance components excluded from coverage include, but are not limited to: fuel pump, turbocharger, air compressor, fan clutch, water pump, fan hub, fan idler pulley assembly, vibration damper, belts, hoses, belt tensioner and thermostat.
• Major components coverage (CWS)
  • Engine cylinder block casting
  • Engine cylinder head castings and capscrews
  • Engine crankshaft forging
  • Engine camshaft forging
  • Engine connecting rods
  • Flywheel housing
  • Intake manifold castings
  • Valve covers
  • Oil cooler cover/filter heads
  • Oil pan
  • Gear cover and housing
  • Gear train gears:
    • Crankshaft gear
    • Camshaft gear
    • Accessory drive gear
• All plans exclude Aftertreatment component failures

School Bus Coverage

CWF - Full Coverage 

CWB - Engine coverage, excluding all maintenance components 

CWS - Major components coverage 

NOTE: Peterbilt and Kenworth have elected to not sell Extended Coverage on Cummins Natural Gas engines in 2024.

Extended Coverage Plans for Cummins Natural Gas engines (including the X15N launching in July 2024) must be purchased through a Cummins Distributor.

Coverage purchase must be documented on a Cummins Extended Coverage Certificate. The certificate must be signed and dated by the customer.

For complete coverage details see legal description (Bulletins CWB - 3605912, CWS - 3605911 and CWF - 3385468).

Questions on coverage content or certificate registration contact: Local Factory Representative or Cummins Distributor.