RoadVitals

2012 Monaco Diplomat

Recalls, owner-reported complaints, investigations and safety data

Owner complaintsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
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Safety recallsA safety recall is issued when a manufacturer or NHTSA determines that a vehicle has a safety-related defect or does not comply with a federal motor vehicle safety standard. Recall repairs are free. Whether a specific vehicle is covered depends on its VIN — a recall listed for a model year does not necessarily apply to every vehicle of that year.
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Latest Dec 23, 2015
InvestigationsNHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
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Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
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Overview

Our database contains no NHTSA owner-reported complaints for the 2012 Monaco Diplomat. 1 safety recall has been issued covering this model year; and 19 manufacturer communications are on file.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Safety recalls

1 campaign cover this model year

Recalls apply to specific vehicles, not to every vehicle of a model year. Check your VIN with NHTSA or your manufacturer's dealer to confirm whether a recall affects your vehicle.

Check a VIN on NHTSA.gov
15V872000

EQUIPMENT:RECREATIONAL VEHICLE/TRAILER

Dec 23, 2015
2,123 units potentially affected
The defect: Allied Recreation Group, Inc. (ARG) is recalling certain model year 2010-2011 Holiday Rambler Admiral, 2009-2014 Holiday Rambler Ambassador, 2010 Holiday Rambler Arista, 2010-2014 Holiday Rambler Endeavor, 2009-2011 Holiday Rambler Neptune, 2011-2014 Holiday Rambler Vacationer, 2009-2011 Monaco Cayman, 2010-2014 Monaco Diplomat, 2014 Monaco Dynasty, 2009-2014 Monaco Knight, 2012-2013 Monaco LaPalma, 2009-2013 Monaco Monarch, 2009-2011 Monaco Riptide, 2008 Safari Passage, and 2008 Safari Simba motorhomes. The affected vehicles are equipped with certain Lippert-brand Coachstep Double Electric Steps. These steps use a bolt to attach the fan gear assembly to the steps. This bolt may fracture allowing the fan gear to disengage from the steps. As a result, the steps may not remain in the expected position and may be unstable.
The risk: Unstable entry and exit steps increase the risk of injury.
The remedy: ARG will notify owners and dealers will install a retainer bracket to reinforce the operating mechanism, free of charge. The recall began on February 12, 2016. Owners may contact ARG customer service number at 1-800-509-3417. ARG's number for this recall is 151216REV.
Allied Recreation Group, Inc.Manufacturer number 151216REVView on NHTSA.gov

Recent owner complaints

Reports submitted to NHTSA, shown in the owner's own words

No owner complaints recorded for this model year

Either none have been filed with NHTSA, or this vehicle is too new for reports to have accumulated.

Manufacturer communications

A bulletin sent by a manufacturer to its dealers. Not a recall, and repairs are not necessarily free.

IK2600090

ENGINE

New CARB Idle Reduction Change Request

IK4300035

ELECTRICAL SYSTEM

This tool is designed to compare Diamond Logic feature data across multiple vehicle configuration files. It allows users to quickly load files either manually or directly from the Diamond Logic Builder Vehicles folder using VIN-based selection. As files are added or removed, the comparison runs automatically with no manual action required. The program presents results in an interactive table that shows feature codes, descriptions, access levels, and whether each feature is present in each selected file. Built-in search, filtering, and sorting make it easy to locate specific features or focus only on differences between files. Column visibility can be customized to show or hide descriptions and access information as needed. Users can remove files individually or clear all files at once, with results updating instantly. The tool also includes reporting and export options that reflect exactly what is visible on screen, allowing results to be printed, copied, saved as text, or exported to CSV for use in Excel or other spreadsheet tools. Overall, the program streamlines the process of comparing vehicle feature configurations, helping users quickly identify differences, validate setups, and document results without manual comparison or external tools.

IK2600255

ENGINE

This document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature. Customer requested changes will be approved in accordance with the requirements specified in 40 CFR Part 1037 to ensure continued compliance with greenhouse gas (GHG) regulations.

IK2600047

ENGINE

Engine replacements for all International engines will need to follow this procedure.

IK1600272

STRUCTURE:BODY

This document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and windshields using an ultrasonic sound detector.

IK0600030

POWER TRAIN

This document will guide the user through understanding Prop Shaft Codes and understanding the variations of prop codes. (Metric Prop codes start with the number a 4 and Non metric Prop codes start with a 2.)

Manufacturers file copies of the bulletins they send to dealers with NHTSA. These often describe diagnostic or repair procedures for a known condition. They are not recalls: repairs described in a bulletin are usually only free if the vehicle is still under warranty or the manufacturer has extended coverage.

Compare model years

Complaint and recall counts across every year of this model

Monaco Diplomat by model year
YearComplaintsRecallsInvestigationsIssue Index
2018010—
2017010—
2016000—
2014010—
2013120—
2012Viewing010—
2011110—
2010010—

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers. Older model years have had longer for reports to accumulate.