Photo of Rv
Photo of Rv
Photo of Rv
  • Price: $349,950
  • Year: 2019
  • Model: MOUNTAIN AIRE 4018
  • Property ID: 7042959
  • Partner ID: 5040939530
  • Posted On: Jun 12, 2026
  • Updated On: Jun 12, 2026

RV Description

2019 Newmar Mountain Aire 4018 with Spartan K3-500 chassis / 500hp Cummins ISX-12 engine Bath and 1/2 Full wall slide.

  • SUPER RARE SOUGHT AFTER 40' TAG AXLE WITH 500HP
  • ORIGINAL OWNER
  • ALL SERVICE RECORDS
  • FULL WALL SLIDE
  • COMFORT DRIVE
  • BATH AND 1/2 FLOORPLAN
  • BEAUTIFUL COLORS
  • LOADED WITH OPTIONS
  • K3 CHASSIS
  • 500HP

Exterior: “Palisade” paint scheme with “Linen Tweed” awnings 
Interior color scheme: “Palisade” with “Bermuda Glazed Maple” cabinetry 
All Furniture including Captain’s Chairs reupholstered with genuine “Ultraleather” brand fabric by Newmar under warranty in 2024 - original fabric was knock-off that underperformed.. so 2019 coach has 2024 furniture upholstery throughout. Custom-designed electric fireplace cabinetry in living room installed by Newmar at build 
 

Custom AC electric outlet and HDMI cables installed by Newmar at build 
Upgraded Sony Smart TV (Android) television installed in living room (1” larger screen than Newmar original) with upgraded Bose soundbar including subwoofer – on “Televator” Upgraded Sony Smart TV (Android) in bedroom with added LG soundbar and subwoofer 
 

House high-flow water pump installed 2026 with upgraded wiring 
Whole house adjustable water pressure regulator installed with pressure gauge New house batteries 2025, New chassis batteries 2024 
Girard Awnings factory serviced (by Girard) 2025 Spartan Chassis “Air Force One” tow brake setup (use with existing upgraded Roadmaster 
Towbar or other) 

 

One owner – picked up from Newmar factory June, 2019 
Zero accidents, Roof has never been modified (pierced) since Newmar build, Service records included – performed scheduled service yearly 
Front steering tires 1 year old Michelin (identical factory-replacement 
Professionally 4-corner weighed to determine proper tire inflation – paperwork included, All owner’s manuals / keys and paperwork included.

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