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: 2 of 2 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.
Electrical System. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Power Train. 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 reports0 fire reports0 injury reports
What owners actually said
2 reports
8,000 miles · Mar 17, 2008
Electrical System
TL*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 …
Read full complaint
TL*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 *BF
NHTSA ODI #10221433
4,600 miles · Aug 17, 2006
Power Train
SQUEALING NOISE COMING FROM PRIMARY GETS LOUDER AS IT REACHES NORMAL OPERATING TEMPERATURE. DEALER SAYS THEY DON'T KNOW WHAT IS WRONG. AFTER MANUFACTURER HAD THE BIKE FOR 3 WEEKS, THEY SAID "WE GAVE IT OUR BEST SHOT WITH OUR BEST TECH, HAVE YOUR ATTORNEY CALL US". ONE OF NUMEROUS PROBLEMS NOT FIXED. *NM
ON CERTAIN MOTORCYCLES, THE PISTON IN THE REAR MASTER CYLINDER MAY HAVE BEEN IMPROPERLY SIZED, WHICH COULD CAUSE THE REAR BRAKES TO DRAG OR LOCKUP.
Consequence & remedy
Consequence: THIS COULD RESULT IN A CRASH.
Remedy: DEALERS WILL REMOVE THE PISTON FROM THE REAR MASTER CYLINDER AND REPLACE IT WITH A NEW PISTON. OWNER NOTIFICATION BEGAN ON APRIL 12, 2004. OWNERS SHOULD CONTACT BIG DOG AT 1-316-267-9121.
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
0
No exact-year investigations in this snapshot.
2004 Bigdog Mastiff Problems, Complaints & Recalls | Skip That Year