The Used Car Index

2012 Monaco Diplomat problems

No complaints are listed for the 2012 Monaco Diplomat. NHTSA's API and bulk file list none in this build.

Data build 2026-10-08.

NHTSA lists this vehicle as MONACO DIPLOMAT.

At a glance

Complaints
0
With crash
0
With fire
0
With injury (complaints)
0
Injuries
0
Deaths
0
Recalls
1
Do not drive recalls
0
Park outside recalls
0
Recall potential units (maximum)
2,123
Investigations
0
Open investigations
0
Manufacturer communications
19

Complaints per 100k sold unavailable. No sales source is available for this record.

Model-generated complaint tags: No complaints are listed for tagging.

Recalls

See new recalls and investigations this week.

1 recalls.

15V872000

Date: 2015-12-23. Systems: EQUIPMENT.

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 LaPalm (excerpt)

Consequence: Unstable entry and exit steps increase the risk of injury. (excerpt)

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. (excerpt)

Do not drive: No. Park outside: No.

Investigations

0 investigations; 0 open.

Manufacturer communications

19 manufacturer communications.

Communications by system
SystemCount
ENGINE4
UNKNOWN OR OTHER4
ENGINE AND ENGINE COOLING3
ELECTRICAL SYSTEM2
POWER TRAIN2
STRUCTURE2
EQUIPMENT1
STEERING1

11028361

Date: 2026-02-05. Type: Other. Systems: ENGINE.

New CARB Idle Reduction Change Request

11029461

Date: 2026-02-03. Type: Service Bulletin/Repair Instructions. Systems: 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 auto

11028362

Date: 2026-01-26. Type: Other. Systems: 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 green

11028359

Date: 2026-01-02. Type: Service Bulletin/Repair Instructions. Systems: ENGINE.

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

11027310

Date: 2025-12-19. Type: Service Bulletin/Repair Instructions. Systems: STRUCTURE.

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.

11026148

Date: 2025-12-05. Type: Service Bulletin/Repair Instructions. Systems: 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.)

11026190

Date: 2025-11-06. Type: Service Bulletin/Repair Instructions. Systems: STRUCTURE.

In some geographic areas, ambient temperatures reaching below 15A?F (-10 A?C), including high levels of humidity, an operator may experience engine stalling, low performance, and or poor aftertreatment performance. This is caused by condensation accumulating and freezing within the Charge Air Cooler

11022447

Date: 2025-08-28. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

Title: Service Portal iKNow Feedback Case Types Applies To: All

11022310

Date: 2025-08-25. Type: Service Bulletin/Repair Instructions. Systems: POWER TRAIN.

Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles

11021609

Date: 2025-07-18. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

Title: A/C Refrigerant and Oil Capacities Applies To: All current models

Notes on this record

  • Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
  • System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
  • Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
  • A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.
  • NHTSA's complaints API and bulk file list no complaint for this make, model and model year in this data build.

Other names NHTSA uses

None listed.

Matched NHTSA models

Matched labels and complaints
NHTSA model labelComplaints
DIPLOMAT0

Same model, other years

All model years | All Monaco models

Other Monaco models, 2012

Sources

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