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2002 Workhorse W20

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

About this comparison →
6Owner complaints

Model-year median: 3

2Recall campaigns

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3Investigations

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How this year compares

Owner complaints by model year

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2005
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Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

Service Brakes, Hydraulic
5Service Brakes, Air
1

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

Limited mileage data: 6 of 6 reports include usable mileage. There isn’t enough coverage to show a useful chart.

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Service Brakes, Hydraulic. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes, Air. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

0 crash reports1 fire reports0 injury reports

What owners actually said

6 reports
15,392 miles · Jun 21, 2010
Service Brakes, Hydraulic

TL* THE CONTACT OWNS A 2002 WINNEBAGO ADVENTURER WITH A WORKHORSE W20 CHASSIS MOTOR HOME (RV). THE CONTACT STATED WHILE DRIVING AT SPEEDS OF 55 MPH, THE FRONT PASSENGER SIDE BRAKES LOCKED AND THE ANTI LOCK BRAKING SYSTEM FAILED. THE CONTACT MOVED THE VEHICLE OFF THE ROADWAY AND WAITED FOR THE BRAKES TO COOL. THE FAILURE OCCURRED…

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TL* THE CONTACT OWNS A 2002 WINNEBAGO ADVENTURER WITH A WORKHORSE W20 CHASSIS MOTOR HOME (RV). THE CONTACT STATED WHILE DRIVING AT SPEEDS OF 55 MPH, THE FRONT PASSENGER SIDE BRAKES LOCKED AND THE ANTI LOCK BRAKING SYSTEM FAILED. THE CONTACT MOVED THE VEHICLE OFF THE ROADWAY AND WAITED FOR THE BRAKES TO COOL. THE FAILURE OCCURRED APPROXIMATELY EIGHT TIMES AND WAS TAKEN TO THE DEALER WHERE THE BRAKES WERE BLED AT EACH FAILURE. THE VEHICLE WAS TAKEN BACK TO THE DEALER WHERE THE CONTACT WAS AWAITING A DIAGNOSTIC. THE CONTACT REFERENCED NHTSA CAMPAIGN ID NUMBER: 04V084000 (SERVICE BRAKES) AND CAMPAIGN ID NUMBER: 09V110000 (SERVICE BRAKES, HYDRAULIC) BUT WAS UNABLE TO CONFIRM IF THE VEHICLE WAS INCLUDED IN EITHER RECALL. THE FAILURE MILEAGE WAS 15,392 AND THE CURRENT MILEAGE WAS 54,944.

NHTSA ODI #10339361

13,500 miles · Apr 6, 2010
Service Brakes, Hydraulic

TL* THE CONTACT OWNS A 2002 WORKHORSE CHASSIS W20. THE CONTACT STATED THAT THE BRAKE PEDAL FELT SPONGY WHEN HE DEPRESSED IT WHILE DRIVING AT APPROXIMATELY 40 MPH. HE RECEIVED A RECALL NOTICE FOR RECALL 09V110000 (SERVICE BRAKES, HYDRAULIC). THE VEHICLE HAD NOT BEEN TAKEN TO AN AUTHORIZED DEALERSHIP FOR A DIAGNOSTIC TEST BECAUSE …

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TL* THE CONTACT OWNS A 2002 WORKHORSE CHASSIS W20. THE CONTACT STATED THAT THE BRAKE PEDAL FELT SPONGY WHEN HE DEPRESSED IT WHILE DRIVING AT APPROXIMATELY 40 MPH. HE RECEIVED A RECALL NOTICE FOR RECALL 09V110000 (SERVICE BRAKES, HYDRAULIC). THE VEHICLE HAD NOT BEEN TAKEN TO AN AUTHORIZED DEALERSHIP FOR A DIAGNOSTIC TEST BECAUSE THE CONTACT WAS TOLD THAT HE WOULD BE CHARGED FOR IT. WHEN THE CONTACT CALLED THE MANUFACTURER, HE WAS TOLD THAT THE BRAKE COMPANY WAS OUT OF BUSINESS AND THE PARTS FOR THE REPAIR WERE NO LONGER AVAILABLE. THE VEHICLE HAD NOT BEEN REPAIRED AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS APPROXIMATELY 13,500. THE CURRENT MILEAGE WAS APPROXIMATELY 14,000.

NHTSA ODI #10324026

6,000 miles · Dec 17, 2008
Service Brakes, Hydraulic

TL*THE CONTACT OWNS A 2002 WORKHORSE W20. THE CONSUMER STATED THE MOTOR HOME CONTINUES TO HAVE PROBLEMS WITH THE BRAKE CALIPERS EVEN THOUGH THE PROBLEM WAS REPAIRED UNDER RECALL # 04V084000. THE BRAKES OVERHEATED AND DESTROYED THE REAR SPEED SENSOR. THE REAR BRAKES WERE CLEANED AND ADJUSTED AND THE SPEED SENSOR ON THE LEFT SI…

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TL*THE CONTACT OWNS A 2002 WORKHORSE W20. THE CONSUMER STATED THE MOTOR HOME CONTINUES TO HAVE PROBLEMS WITH THE BRAKE CALIPERS EVEN THOUGH THE PROBLEM WAS REPAIRED UNDER RECALL # 04V084000. THE BRAKES OVERHEATED AND DESTROYED THE REAR SPEED SENSOR. THE REAR BRAKES WERE CLEANED AND ADJUSTED AND THE SPEED SENSOR ON THE LEFT SIDE WAS REPLACED. WHILE DRIVING, THE RIGHT FRONT BRAKE LOCKED UP AND THE MOTOR HOME HAD TO E TOWED. THE CONSUMER WAS INFORMED THE REAR CALIPER WAS FROZEN. ON A SEPARATE OCCASION, THE BRAKES SEIZED AND THE ABS SENSOR BURNED OUT. THE LEFT FRONT CALIPERS HAD TO BE REPLACED, THE LEFT FRONT WHEELS SPEED SENSOR AS WELL AS THE HUB SEAL. UPDATED 02/09/09 *CN UPDATED 02/10/09. *JB

NHTSA ODI #10252092

23,239 miles · Aug 25, 2008
Service Brakes, AirFire

TOOK VEHICLE INTO DEALER AND HAD CAMPAIGN NUMBER 04V019000 COMPLETED ON 10-26-04. NOW LESS THAN 10,000 MILES SINCE THEN, IT IS BACK AT THE SERVICE CENTER AFTER BRAKE FIRE AND PEDAL LOSS. VEHICLE IS IN NEED OF ROTORS, CALIPERS AND WHEEL SPEED SENSOR. *TR

NHTSA ODI #10239616

28,819 miles · Jul 2, 2008
Service Brakes, Hydraulic

WE HAD A BRAKE RECALL DONE ON OUR 2002 ITASCA SUNCRUISER MOTORHOME (W20 CHASSIS IN JAN 2005, MILEAGE 9141. WHILE ON VACATION IN JULY 2005, THE BRAKES OVERHEATED AND REPAIRS WERE AUTHORIZED BY WORKHORSE AT NO CHARGE AT MILEAGE 9,687. EXPERIENCED OVERHEATING AGAIN IN SEPTEMBER 2007 AT MILEAGE 28819. REPAIRS DONE AT OUR EXPENS…

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WE HAD A BRAKE RECALL DONE ON OUR 2002 ITASCA SUNCRUISER MOTORHOME (W20 CHASSIS IN JAN 2005, MILEAGE 9141. WHILE ON VACATION IN JULY 2005, THE BRAKES OVERHEATED AND REPAIRS WERE AUTHORIZED BY WORKHORSE AT NO CHARGE AT MILEAGE 9,687. EXPERIENCED OVERHEATING AGAIN IN SEPTEMBER 2007 AT MILEAGE 28819. REPAIRS DONE AT OUR EXPENSE - REPLACE REAR ROTOR, WHEEL SEAL AND BRAKE PADS, ABS RING, REAR ABS SENSOR. AFTER 249 MILES, REAR BRAKE OVERHEATED AT MILEAGE 29,068, CHECKED FOR DAMAGE DUE TO OVERHEATING BUT THERE WAS NONE. HAD TO PAY FOR LABOR TO MAKE THIS DETERMINATION. *TR

NHTSA ODI #10233082

31,260 miles · Dec 28, 2006
Service Brakes, Hydraulic

TL* - THE CONTACT STATED HAD RECALL BRAKE WORK DONE WITH 31260 MILES ON VEHICLE. THE DEALER REPAIRED ONLY THE FRONT BRAKED UNDER THE RECALL AND NOT THE REAR. THE CONTACT STATED THAT THE RECALL WAS FOR BOTH FRONT AND REAR BRAKES, AND HE STARTED TO HAVE PROBLEM WITH THE REAR BRAKES. HE THEN TOOK THE RV BACK TO THE DEALER AND…

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TL* - THE CONTACT STATED HAD RECALL BRAKE WORK DONE WITH 31260 MILES ON VEHICLE. THE DEALER REPAIRED ONLY THE FRONT BRAKED UNDER THE RECALL AND NOT THE REAR. THE CONTACT STATED THAT THE RECALL WAS FOR BOTH FRONT AND REAR BRAKES, AND HE STARTED TO HAVE PROBLEM WITH THE REAR BRAKES. HE THEN TOOK THE RV BACK TO THE DEALER AND THEY DID NOT HONOR THE RECALL TO FIX THE REAR BRAKES. THE CONTACT CALLED THE MANUFACTURER, AND THEY TOLD HIM TO TAKE THE VEHICLE TO LARRY'S RV WHERE THE RECALL CLAIM WAS DENIED AS WELL, BECAUSE HE WAS NOT THE FIRST OWNER. *AK UPDATED 1/31/2007 - *NM

NHTSA ODI #10177222

Official recalls

2

09V110000 · Service Brakes, Hydraulic

Apr 3, 2009

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 SEASONAL VEHICLE OPERATION MAY EXPERIENCE CALIPERS STICKING IN THE APPLIED POSITION. THIS CAN RESULT IN ABNORMAL HEAT GENERATION AT THE WHEEL END CAUSING BRAKE DRAG. THE DRIVER WOULD NORMALLY HAVE WARNING OF THE BRAKE DRAG IF UNDETECTED BY THE DRIVER.

Consequence & remedy

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.

04V084000 · Service Brakes, Hydraulic

Feb 18, 2004

ON CERTAIN MOTORHOME CHASSIS EQUIPPED WITH BOSCH ZOPS, THE PADS CAN DRAG ON THE ROTOR SURFACE DUE TO THE PIN SLIDE.

Consequence & remedy

Consequence: A HANG UP OR LOCK UP MAY CAUSE THE CALIPERS TO OVER HEAT AND NOT ALLOW THE DRIVER TO STOP SAFELY. THIS COULD CAUSE OVERHEATING OF THE BRAKE CALIPERS WHICH COULD RESULT IN A VEHICLE FIRE.

Remedy: DEALERS WILL INSPECT, REPAIR AND REPLACE ACCORDING TO THE PROCEDURE DEVELOPED BY BOSCH (SEE CAMPAIGN 03E064000). THE RECALL BEGAN ON AUGUST 1, 2004. OWNERS SHOULD CONTACT WORKHORSE AT 1-877-294-6773.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

3

EA07016 · Overheating Disc Brake Caliper

Opened Nov 16, 2007 · Closed Aug 19, 2009

Status: closed (inferred from source dates) · Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

Additional source detail variants (7)

Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

Service Brakes, Hydraulic

THE EA WAS OPENED TO GAIN A TECHNICAL UNDERSTANDING OF THE CAUSES FOR ONE OR MORE DISC BRAKE CALIPERS ON A SUBJECT VEHICLE TO SUFFER SEVERE OVERHEATING. THE OVERHEATING CAUSED BRAKE DRAG, MELTING ABS SENSORS, SMOKING, BRAKE LINING FIRES, AND IN SOME CASES BOILING BRAKE FLUID RESULTING IN DIMINISHED STOPPING CAPABILITY.BASED ON TESTING, WARRANTY AND COMPLAINT DATA ANALYSIS, FIELD TRIPS AND INTERVIEWS WITH OWNERS, MECHANICS AND SERVICE MANAGERS, ODI BELIEVES THE LIKELY CAUSE OF THE ALLEGED DEFECT IS WATER SWELL OF THE PHENOLIC CALIPER PISTON AND SUBSEQUENT FAILURE OF THE PISTON TO FULLY RETURN AFTER THE PEDAL IS RELEASED.A TECHNICAL REPORT IS ATTACHED WITH FULL DETAILS.

PE07032 · Overheated Brake Calipers

Opened Jun 25, 2007 · Closed Nov 19, 2007

Status: closed (inferred from source dates) · Service Brakes, Hydraulic

ON JUNE 25, 2007, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED OVERHEATING DISC BRAKE CALIPERS AND POOR BRAKE PERFORMANCE IN MODEL YEAR (MY) 2000-2005 WORKHORSE CHASSIS RECREATIONAL VEHICLES.CURRENTLY ODI IS AWARE OF 651 SPECIFIC COMPLAINTS ON THE SUBJECT VEHICLES (ODI AND WORKHORSE COMPLAINT POPULATION).ODI ANALYSIS OF THE WARRANTY AND COMPLAINT DATA FURNISHED BY WORKHORSE ON SEPTEMBER 11, 2007, IN RESPONSE TO ODI'S INFORMATION REQUEST INDICATES A DRAMATIC DROP IN BRAKE RELATED COMPLAINTS AFTER THE MAY 2004 BUILD DATE.AT THAT TIME, WORKHORSE INCORPORATED INTO PRODUCTION ZERK FITTINGS AND GREASING OF THE BRAKE MASTER CYLINDER'S BELL CRANK LINKAGE.ODI IS ALSO AWARE OF 3,782 UNIQUE WARRANTY COUNTS RELATED TO THE ALLEGED DEFECT IN THE SUBJECT POPULATION.A REVIEW OF THE WARRANTY CLAIMS REVEALS THAT OF THE CLAIMS FILED, ONLY 88 WERE SUBMITTED ON VEHICLES PRODUCED AFTER THE MAY 2004 PRODUCTION LINE CHANGE (ADDITION OF ZERK FITTINGS).ODI INTENDS TO OBTAIN AN UNDERSTANDING OF WHY THERE ARE SEEMINGLY SIGNIFICANT DIFFERENCES IN THE COMPLAINT DATA AND WARRANTY CLAIMS BEFORE AND AFTER THE MAY 2004 DESIGN CHANGE AND THE SAFETY CONSEQUENCES OF THE PRE-CHANGE DESIGN. THIS INVESTIGATION HAS BEEN UPGRADED TO AN ENGINEERING ANALYSIS (EA07-016) FOR FURTHER INVESTIGATION.

EA03003 · Overheating Front And Rear Brakes

Opened Apr 9, 2003 · Closed Mar 3, 2004

Status: closed (inferred from source dates) · Service Brakes, Hydraulic:foundation Components

THIS INVESTIGATION WAS DERIVED FROM INFORMATION GATHERED DURING PE02-046, BOSCH DISC BRAKE CALIPERS.THIS INVESTIGATION FOCUSED ON THE VEHICLE MANUFACTURER, NEWMAR.SUBJECT VEHICLES WERE THOSE BUILT WITH A HYDRAULIC BRAKE SYSTEM INCORPORATING THE BOSCH ZERO OFFSET PIN SLIDE (ZOPS) CALIPERS.ODI'SCONCERN WASEXCESSIVE WHEEL END HEAT, POSSIBLY RESULTING IN A WHEEL END FIRE.DURING THE INVESTIGATION, ODI DISCOVERED TWO SPECIFIC NEWMAR VEHICLE MODELS, THOSE BUILT ON NEWMAR CHASSIS AND THOSE BUILT ON A WORKHORSE CHASSIS. AS A RESULT OF THE AGENY'S INVESTIGATION INTO THIS MATTER, ALL NEWMAROWNERS WILL BE NOTIFIED (04V-019) AND THE REMEDY WILL BE APPLIED TO THEIR VEHICLES. SOME NEWMAR VEHICLES (1,795) BUILT ON THE WORKHORSE CHASSIS ARE BEING RECALLED BY WORKHORSE (04V-084).THIS INVESTIGATION IS CLOSED.FURTHER DETAILS ARE PROVIDED ON PAGES 2, 3, AND 4.COPIES OF BOTH SAFETY RECALLS ARE ATTACHED.