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#BS-2004-WORW20-5CF2

2004 Workhorse W20

Based on reports from 11 owners and 2 recalls for this exact model.

Complaints

Crashes

Fires

Recalls

TSBs

✅

Preliminary Verdict

Green Light

Based on 11 complaints, 0 crashes, 0 fires, and 2 recalls.

See full verdict with buy/skip conditions

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Mechanic Inspection Checklist

!Check the BrakesHIGH

3 owners reported brakes issues — failures commonly reported around 18K miles.

!Inspect the Service Brakes, Hydraulic:foundation Components:disc:caliperMED

Look for symptoms of wear and premature failure

+ 6 more items in full checklistUnlock

30,000-Mile Cost Projection

Best Case

$X,XXX

Most Likely

$X,XXX

Worst Case

$X,XXX

Top cost driver: Brakes (3 reports).

Includes fuel costs, common repairs, and recall riskUnlock

Also in your report

Owner Intelligence

AI-synthesized themes from real complaints

Buyer Lot Checklist

Questions, test drive checks, walk-away triggers

Negotiation Talking Points

Data-backed dollar deductions

Buy / Skip Verdict

Final recommendation with conditions

10 sections total in the full reportUnlock all

Where the complaints fall

Brakes3 (27%)

Service Brakes, Hydraulic:foundation Components:disc:caliper1 (9%)

Service Brakes, Hydraulic:foundation Components:disc:rotor1 (9%)

Service Brakes, Hydraulic:foundation Components:drum:wheel Cylinders1 (9%)

Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip1 (9%)

Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip:abs Warning Light1 (9%)

Wheels & Tires1 (9%)

Electrical System: Instrument Cluster/panel1 (9%)

2004 Workhorse W20: Known Issues & Problem Areas

Brakes Issues

Brakes complaints account for 27% of all reports filed for the 2004 Workhorse W20, with 3 owners filing complaints with NHTSA. The median mileage at time of complaint is 17,600 miles, suggesting issues tend to surface around the 18K-mile mark.

Service Brakes, Hydraulic:foundation Components:disc:caliper Issues

Service Brakes, Hydraulic:foundation Components:disc:caliper complaints account for 9% of all reports filed for the 2004 Workhorse W20, with 1 owners filing complaints with NHTSA. Owners should pay attention to service brakes, hydraulic:foundation components:disc:caliper-related symptoms during test drives and pre-purchase inspections.

Service Brakes, Hydraulic:foundation Components:disc:rotor Issues

Service Brakes, Hydraulic:foundation Components:disc:rotor complaints account for 9% of all reports filed for the 2004 Workhorse W20, with 1 owners filing complaints with NHTSA. Owners should pay attention to service brakes, hydraulic:foundation components:disc:rotor-related symptoms during test drives and pre-purchase inspections.

Service Brakes, Hydraulic:foundation Components:drum:wheel Cylinders Issues

Service Brakes, Hydraulic:foundation Components:drum:wheel Cylinders complaints account for 9% of all reports filed for the 2004 Workhorse W20, with 1 owners filing complaints with NHTSA. Owners should pay attention to service brakes, hydraulic:foundation components:drum:wheel cylinders-related symptoms during test drives and pre-purchase inspections.

Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.

Complaint trend by year

Complaints filed with NHTSA by year for the 2004 Workhorse W20. Recent trend: decreasing.

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Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict

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Recall History (2 recalls)

06V225000Sep 2006

ENGINE AND ENGINE COOLING

ON CERTAIN MOTOR HOME AND TRUCK CHASSIS EQUIPPED WITH GENERAL MOTORS 8.1L V8 ENGINES, IMPROPER HARDENING DURING THE HEAT TREATMENT PROCESS CAN CAUSE THE FUEL RAIL PULSE DAMPER RETAINER CLIP TO FRACTURE, RESULTING IN INADEQUATE RETENTION OF THE DAMPER. IF THE DAMPER BECOMES LOOSE, FUEL COULD BE PUMPED BY THE FUEL PUMP INTO THE UNDER HOOD AREA.

09V110000Sep 2010

SERVICE BRAKES, HYDRAULIC

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.

Recall severity analysis & seller scripts

The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.

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About this data

NHTSA Complaints

Federal database of owner-filed safety complaints. 11 records for this vehicle.

NHTSA Recalls

Manufacturer-issued safety recalls. 2 recalls found for this vehicle.

Repair Cost Data

Real-world repair costs from owner reports and independent databases.

Other Workhorse W20 Model Years

2008 2007 2006 2005 2004 2003 2002 2001 2000

View all Workhorse W20 years →

2004 Workhorse W20: Frequently Asked Questions

What is the most common problem with the 2004 Workhorse W20?

The most commonly reported issue with the 2004 Workhorse W20 is related to the brakes, with 3 complaints filed with NHTSA.

Is the 2004 Workhorse W20 reliable?

The 2004 Workhorse W20 has 11 complaints, 0 crash reports, and 0 fire reports filed with NHTSA. The full report analyzes whether these numbers indicate real risk or are proportional to the vehicle’s popularity.

How much does it cost to fix 2004 Workhorse W20 problems?

Repair costs vary by issue. The full BumperScan report includes detailed repair cost estimates (low/median/high) for every major issue, plus a 30,000-mile total cost of ownership projection.

Does the 2004 Workhorse W20 have any recalls?

Yes, the 2004 Workhorse W20 has 2 recalls on record. The full report includes recall severity analysis and scripts for asking the seller about recall completion.

What mileage do Workhorse W20 problems start?

Based on 9 complaints with mileage data, the median mileage at time of complaint is 17,600 miles. The highest concentration of reported issues occurs in the 0–30K mile range. The full report breaks down exactly which components fail at each mileage bracket.

What’s in the full report?

10 sections of AI analysis: severity-ranked issues, component scores (0-100), 30K-mile cost projection, failure timeline by mileage, recall details with seller scripts, owner sentiment analysis, mechanic checklist, buyer lot checklist, negotiation ammo with dollar figures, and a buy/skip verdict.

How is this different from free NHTSA data?

NHTSA gives you raw complaint text. BumperScan cross-references 2.1M+ complaints with community repair cost data, EPA fuel data, and recall records — then uses AI to synthesize it into actionable advice with dollar figures.

How is this different from Carfax?

Carfax is VIN-specific history ($45/report). BumperScan is model-level reliability intelligence — what problems this car is known for, what they cost, and whether you should buy it. Complementary, not competing.

What if the report isn’t useful?

100% money-back guarantee. If the report doesn’t help you make a more informed decision, we’ll refund you — no questions asked.

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10 sections of AI analysis based on 11 owner reports. Know before you buy.

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