The 2004 Holiday Rambler Neptune has 2 NHTSA recall campaigns affecting an estimated 4,983 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 6 complaints with NHTSA, most often about the suspension. Last updated July 5, 2026.
Recall campaigns
SUSPENSION05V0530002005-02-142,827 affected
Defect
ON CERTAIN CLASS A MOTOR HOMES, THE SPACER PLATE UNDER THE TRAILING ARMS HAD A TRANSVERSE WELD WHICH CREATES A HEAT RISER AND CAUSE THE TRAILING ARMS TO CRACK.
Consequence
THIS COULD CREATE ROUGH DRIVING CONDITIONS AND DAMAGE TO REAR SUSPENSION SYSTEM. THE DRIVER COULD LOOSE CONTROL OF THE MOTORHOME AND A CRASH COULD OCCUR WITHOUT PRIOR NOTICE.
Remedy
DEALERS WILL INSPECT THE REPLACE THE TRAILING ARMS FOR CRACKS AND REPLACING THE TRAILING ARMS AND U-BOLTS IN THE REAR SUSPENSION OF THE MOTORHOMES FREE OF CHARGE. THE RECALL BEGAN ON MARCH 29, 2005. OWNERS MAY CONTACT MONACO AT 1-800-685-6545.
SUSPENSION04V0380002004-01-282,156 affected
Defect
ON CERTAIN MOTORHOMES, THE I-BEAM LEAF IMITATOR IN THE FRONT AXLE SUSPENSION COULD CRACK AND BREAK DUE TO AN INADEQUATE WELDING PROCESS.
Consequence
THE I-BEAMS ON THE FRONT AXLE AND THE PANARD BRACKET ON THE REAR AXLE COULD CRACK AND BREAK CAUSING THE DRIVER TO LOSE CONTROL OF THE VEHICLE INCREASING THE RISK OF A CRASH.
Remedy
DEALERS WILL REPLACE THE ORIGINAL I-BEAM. ALSO, DEALERS WILL WELD THE STIFFENERS FROM THE PANARD BAR BRACKET TO THE CENTER DIFFERENTIAL OF THE REAR AXLE HOUSING. OWNER NOTIFICATION BEGAN MARCH 1, 2004. OWNERS SHOULD CONTACT MONACO AT 1-877-466-6226.
Complaints by component
SUSPENSION
2
ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY
1
POWER TRAIN:AXLE ASSEMBLY
1
SUSPENSION:REAR
1
SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY
1
Total complaints6
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“The contact owns a 2004 holiday rambler neptune built on a roadmaster chassis. The contact stated while driving approximately 30 mph, the rv was swaying in the lane and the steering wheel shifted position and was horizontal. The contact stated no warning light was illuminated. The contact stopped…”
“The contact owns a 2004 holiday rambler neptune built on a roadmaster chassis. The contact stated while driving approximately 30 mph, the rv was swaying in the lane and the steering wheel shifted position and was horizontal. The contact stated no warning light was illuminated. The contact stopped…”
“Embarked on a road trip at approximately 9:30 am after traveling about 4 miles the entire motorhome went into a violent and severe swaying motion. I slowed the veh and pulled to shoulder of the road, inspected all tires, nothing apparent or obvious. Used a creeper to inspect under veh suspension…”
“Found both rear trailing arms to be cracked upon inspection. Replaced both arms to correct problem. Old arms were cracked to a point where total failure was eminent. *tr”
“With only 14,000 miles on vehicle the aluminum radiator began leaking where the core is attached to the tank. Manufacture has since replaced aluminum with steel radiators but would not agree to pay for any of the replacement since the warranty time has expired. I have talked to other people with…”
“Consumer letter regarding vehicle safety defect service bulletin recall campaign 05v053000. *mr”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2004 Holiday Rambler Neptune as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
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