2004 Big Dog Mastiff Electrical system Problems
- Complaints
- 5about this part
- Share
- 83%of 6 total for the year
- Median mileage
- 6,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the electrical system of the 2004 Big Dog Mastiff, 83% of the 6 complaints for this model year. Where a mileage was given, the median is 6,500 miles. 1 recall campaign on record is filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The electrical system had intermittent problems since the bike was new. Headlight would flicker on & off, rear tail lights flashed on & off. Nothing was found when bike was taken to local dealer for routine maintenance. Ehc module completely failed now and bike will not run. Told the replacement part is not yet available and when it is, it will cost well over $1000.00 to repair and big dog refuses to cover it and said sorry, bike is out of warranty . I have never been contacted about a recall.”
NHTSA complaint #10374072, filed 2011-01, 12,000 miles“2004 and other years. The ech unit. Many of these have went bad. The big dog company is not taking responsibility for this. I was hoping to get an investigation started.”
NHTSA complaint #10322657, filed 2010-03, 1,300 miles“The contact owns a 2004 big dog Mastiff. The vehicle was included in the recall associated with NHTSA campaign id number: 10v180000, (electrical system). The manufacturer advised the contact to take the vehicle to an authorized dealer for repairs. The vehicle was taken to various authorized dealers where the contact was advised that the necessary parts to perform the remedy were unavailable due to the financial status of the manufacturer. The vehicle was not repaired. The failure mileage was 5,000 and the current mileage was 5,300.”
NHTSA complaint #10361509, filed 2010-10, 5,000 miles“The contact owns a 2004 big dog Mastiff. While driving 45 MPH, the headlights went out. The contact pulled into a gas station and inspected the fuses and circuit breakers. After sitting, the headlights illuminated. He stated that the headlights operated intermittently. Occasionally, the high beams would illuminate. The contact has not yet taken the vehicle to the dealer. The manufacturer stated that they had an issue with a lot of the vehicles and the control boxes were on back order. The current mileage was 10,200 and failure mileage was 8,000. Updated 04-09-08”
NHTSA complaint #10221433, filed 2008-03, 8,000 milesRelated recalls
- 10V180000May 3, 2010Big dog is recalling certain 2004 chopper, bulldog, ridgeback, mastiff, boxer, and pitbull motorcycles. There is a possible loose connection between the…Covers: Big Dog Mastiff 2004, Chopper 2004, Ridgeback 2004 +3 more
Related service bulletins
- 10020152Jun 30, 2006Horn harness wires may break.
- 10020045Jun 23, 2006Ehc contact improvement procedure (revised). Current seal does not allow connector pins to seat properly and moisture may be present in connector.
- 10019909May 3, 2006Dielectric grease addition to connectors.
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2004 | 5 | 83% |
Other parts of the 2004 Big Dog Mastiff
← All problems reported for the 2004 Big Dog Mastiff
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology