The 2006 Workhorse W21 has 1 NHTSA recall campaign affecting an estimated 48,876 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 1 complaint with NHTSA, most often about the service brakes, hydraulic. Last updated July 5, 2026.
Recall campaigns
SERVICE BRAKES, HYDRAULIC09V1100002009-04-0348,876 affected
Defect
NAVISTAR IS RECALLING CERTAIN MODEL YEAR MY 2001-2008 WORKHORSE W20, W21 AND W22 CHASSIS AND CERTAIN MODEL YEAR 2009 THROUGH 2011 MONACO RV ADMIRAL, ARISTA, MONARCH, AND RIPTIDE RECREATIONAL VEHICLES EQUIPPED WITH AXLES THAT INCLUDE BOSCH ZOPS OR ZOHT PIN SLIDE HYDRAULIC DISC BRAKES. WHEN COMBINED WITH OCCASIONAL OR…
Consequence
THE TEMPERATURE INCREASE AT THE WHEEL END CAN EVENTUALLY LEAD TO SOFT PEDAL CONDITIONS DUE TO BRAKE FLUID BOIL, AND POSSIBLE EXTENDED STOPPING DISTANCE INCREASING THE RISK OF A CRASH.
Remedy
WORKHORSE DEALERS WILL REPLACE ALL FOUR BOSCH BRAKE CALIPER ASSEMBLIES FREE OF CHARGE. THE SAFETY RECALL BEGAN ON SEPTEMBER 16, 2010. OWNERS MAY CONTACT WORKHORSE AT 1-877-246-7731.
Complaints by component
SERVICE BRAKES, HYDRAULIC
1
1fires
Total complaints1
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“Tl* the contact owns a 2006 monaco monarch rv equipped with a workhorse chassis w21. While driving approximately 35 mph, the brake pedal was engaged and the anti-lock brake system warning light illuminated. The contact smelled a burning odor and noticed smoke emitting from both front wheels. The…”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2006 Workhorse W21 as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
contains ads and affiliate links. Full methodology.