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#BS-2004-PET378-5C492004 Peterbilt 378
Based on reports from 1 owners and 3 recalls for this exact model.
Preliminary Verdict
Green Light
Based on 1 complaints, 0 crashes, 0 fires, and 3 recalls.
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Mechanic Inspection Checklist
1 owners reported engine and engine cooling:cooling system issues — failures commonly reported around 633K miles.
30,000-Mile Cost Projection
Best Case
Most Likely
Worst Case
Top cost driver: Engine And Engine Cooling:cooling System (1 reports).
Also in your report
Owner Intelligence
AI-synthesized themes from real complaints
Buyer Lot Checklist
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Negotiation Talking Points
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Buy / Skip Verdict
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Where the complaints fall
2004 Peterbilt 378: Known Issues & Problem Areas
Engine And Engine Cooling:cooling System Issues
Engine And Engine Cooling:cooling System complaints account for 100% of all reports filed for the 2004 Peterbilt 378, with 1 owners filing complaints with NHTSA. The median mileage at time of complaint is 633,000 miles, suggesting issues tend to surface around the 633K-mile mark.
Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.
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Recall History (3 recalls)
ENGINE AND ENGINE COOLING
ON CERTAIN TRACTORS EQUIPPED WITH CATERPILLAR DIESEL ENGINES, THE VARIABLE VALVE ACTUATION OIL LINE MAY WEAR AGAINST THE SHARP EDGE OF THE CYLINDER HEAD IF NOT POSITIONED CORRECTLY.
SERVICE BRAKES, AIR
ON CERTAIN NON-ABS EQUIPPED TRUCKS, AN AIR HOSE BETWEEN THE TRACTOR PROTECTION VALVE AND THE BACK OF THE CAB BULKHEAD WAS OMITTED.
EQUIPMENT:OTHER:LABELS
Paccar Incorporated (Paccar) is recalling certain 2004-2013 Peterbilt 379, 357, 378, 367, 388, 365, 389, 385 and 386 trucks manufactured from April 3, 2003, through October 25, 2013 and equipped with tri-drive rear axles and a tag or pusher axle. The affected vehicles may be missing required information from the certification label, specifically the tag or pusher axle the gross axle weight rating, suitable tire and rim information, and recommended tire pressure information. Without this information, the vehicles do not comply with the requirements of 49 C.F.R. Part 567, "Certification."
Recall severity analysis & seller scripts
The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.
About this data
NHTSA Complaints
Federal database of owner-filed safety complaints. 1 records for this vehicle.
NHTSA Recalls
Manufacturer-issued safety recalls. 3 recalls found for this vehicle.
Repair Cost Data
Real-world repair costs from owner reports and independent databases.
Other Peterbilt 378 Model Years
2004 Peterbilt 378: Frequently Asked Questions
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10 sections of AI analysis based on 1 owner reports. Know before you buy.