2013 Monaco Diplomat problems

Verdict · NHTSA data

Limited data — recalls on file

NHTSA has just one complaint on file for the 2013 Monaco Diplomat — too few to judge reliability from owner reports alone — but 2 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work.

NHTSA complaints

Recalls

Investigations

Crash-involved

Fires reported

Injuries

Deaths

—

NCAP overall

How does 2013 compare to other Diplomat years?

Diplomat NHTSA complaints by model year, 2013 highlighted. Red bars are years to avoid.

See all Diplomat years to avoid →

What are the most common 2013 Monaco Diplomat problems?

Component	Complaints	Share	vs prior year
Engine	1	100%	new

Does the 2013 Monaco Diplomat have recalls?

2 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.

15V872000OtherDecember 23, 2015 · 2,123 units

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.

Consequence

Unstable entry and exit steps increase the risk of injury.

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.

13V020000Electrical SystemJanuary 17, 2013 · 7,657 units

Defect

Navistar is recalling certain model year 2012-2013 IC Bus brand model 1300FBC, CE, HC, and RE buses; model year 2011-2013 International brand model Durastar, model year 2013 International brand Workstar trucks; model year 2013 Holiday Rambler brand model Ambassador and Endeavor vehicles; and model year 2013 Monaco brand model Diplomat and Knight vehicles. These vehicles were manufactured August 5, 2010 through September 6, 2012 and are equipped with certain 2011-2013 model year I-6 engines with feature codes 12NUK, 12NUL, 12NUM, 12NUN, 12NUP, 12NUR, 12NUS, 12NUT, 12NUU, 12NUV, 12NUX, 12NUY and 12NUZ. The injection pressure regulator (IPR) harness wire may break due to vibrational damage. This could cause an unexpected shut down of the engine.

Consequence

An unexpected engine shut down while driving may increase the risk of a vehicle crash.

Remedy

Navistar will notify owners, and dealers will replace the IPR wire connector free of charge. The safety recall began on March 15, 2013. Owners may contact Navistar at 1-800-448-7825.

Consumer complaints filed with NHTSA

Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.

“I WAS DRIVING UP A MOUNTAIN WHEN A LOUD BANG OCCURRED. ENGINE LOST POWER AND COULD NOT CLIMB HILL/MOUNTAIN. LARGE AMOUNTS OF BLACK AND WHITE SMOKE CAME FROM THE REAR OF THE COACH. I WAS STUCK ON THE SIDE OF THE MOUNTAIN FOR 14 HOURS BEFORE SOMEONE COULD GET TO US. THIS IS THE SECOND TIME THIS ISSUE…”
Complaint filed with NHTSA · Engine · September 23, 2014

2013 Monaco Diplomat — common questions

Is the 2013 Monaco Diplomat reliable?

The record is thin — 1 NHTSA complaint — so owner-report data can't strongly confirm reliability either way, though 2 recalls should be verified as completed.

Does the 2013 Monaco Diplomat have recalls?

Yes — NHTSA lists 2 recall campaigns affecting the 2013 Monaco Diplomat. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.

Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.

Compiled by Sharon Ben-Moshe, Founder.

How does 2013 compare to other Diplomat years?

What are the most common 2013 Monaco Diplomat problems?

Does the 2013 Monaco Diplomat have recalls?

Consumer complaints filed with NHTSA

2013 Monaco Diplomat — common questions

Is the 2013 Monaco Diplomat reliable?

Does the 2013 Monaco Diplomat have recalls?

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