2021 Ducati MONSTER 821 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
0 owner complaints analyzed
1 distinct recall campaigns
Not available median reported failure mileage
Scope: 2021 model year. Data updated: . 0 complaints include usable failure mileage. View data status.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
No owner complaints are recorded for this selection. A complaint can name multiple components.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
No usable records for this chart.
| Category | Count |
|---|
No records.
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 0; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
No usable failure mileage is recorded. 0 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
No usable records for this chart.
| Category | Count |
|---|
No records.
Pattern summary
There is not enough complaint evidence to summarize patterns.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Vehicle analysis explorer
Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.
Data completeness
0 unique complaints in this selection. Analysis snapshot: 2026-09-30.
Missing, zero and invalid mileage is excluded. Dates after the snapshot are excluded. Examples are limited selections, not a representative sample.
Problems by model year
Model-wide comparison of the eight most reported components across the model. Cells show counts and shares within each model year. Open a cell for source examples.
| Component | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 |
|---|---|---|---|---|---|---|---|
| Service Brakes | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 266.7%ODI 11186983 · 1,800 miON 03/14/2019 WHILE RIDING THE MOTORCYCLE DURING THE DAY I EXPERIENCED A SUDDEN COMPLETE FAILURE OF THE REAR BRAKE SYSTEM WHILE NAVIGATING A TURN. I HAD BEEN ON THE BIKE FOR ABOUT AN HOUR WITH NO INDICATION ANYTHING WAS WRONG. IT WAS VERY SUDDEN AND ALMOST CAUSED ME TO LOSE CONTROL OF THE VEHICLE. UPON A VISUAL INSPECTION I NOTED THERE WAS NO FLUID LEAKING, FLUID LEVEL WAS FULL, BRAKE PADS ARE GOOD, AND NO ABS MALFUNCTION WAS INDICATED ON THE BIKES DISPLAY. IF NOT FOR MY RIDING EXPERIENCE I PROBABLY WOULD HAVE CRASHED. WEATHER WAS SUNNY AROUND… | 1100.0%ODI 11386094 · 702 miWENT FOR A RIDE LAST JANUARY 1,2021 AND WHEN I WAS ABOUT TO APPROACH THE TRAFFIC STOP LIGHT I APPLIED BOTH FRONT AND REAR BRAKE I NOTICED THAT ONLY THE FRONT BRAKE IS WORKING.. SO WHEN I GOT INTO A VACANT LOT I TRIED TO USE THE REAR BRAKE BUT IT FAILED TO STOP THE MOTORCYCLE AND THE BRAKE PEDAL IS HITTING THE TOP PART OF THE EXHAUST SYSTEM.. IT HAS ONLY 702 MILES.. IM GLAD THAT I GOT HOME SAFE USING TRAIL BRAKING(FRONT BRAKE ONLY) I CHECKED THE BRAKE FLUID LEVEL IT IS FULL AND NO LEAKS AT ALL. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Engine | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 133.3%ODI 11338814 · 565 miTHE MOTORCYCLE STALLS WHEN COMING TO A STOP SINCE IT WAS NEW (PURCHASED MAY 2018), WITH THE CLUTCH ACTIVATED AND BIKE STILL ROLLING. I HAVE ALL DEALER SERVICE RECORDS AND VIDEOS DOCUMENTING THIS ISSUE. SEVERAL OTHER PEOPLE ON DUCATI FORUMS HAVE ALSO REPORTED THE SAME ISSUE. DEALER WAS UNABLE TO DIAGNOSE, AND DUCATI NA WAS UNABLE TO RESOLVE. I DEALT WITH THIS FOR ALMOST 2 YEARS UNTIL THE MOTORCYCLE WAS RETURNED TO DUCATI AS PART OF A LEMON LAW BUYBACK. THE STALLING IS A SAFETY ISSUE AND IS MUCH MORE PREVALENT AND SERIOUS THAN DUCATI WOULD LIKE T… | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Fuel/Propulsion System | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 133.3%ODI 11338814 · 565 miTHE MOTORCYCLE STALLS WHEN COMING TO A STOP SINCE IT WAS NEW (PURCHASED MAY 2018), WITH THE CLUTCH ACTIVATED AND BIKE STILL ROLLING. I HAVE ALL DEALER SERVICE RECORDS AND VIDEOS DOCUMENTING THIS ISSUE. SEVERAL OTHER PEOPLE ON DUCATI FORUMS HAVE ALSO REPORTED THE SAME ISSUE. DEALER WAS UNABLE TO DIAGNOSE, AND DUCATI NA WAS UNABLE TO RESOLVE. I DEALT WITH THIS FOR ALMOST 2 YEARS UNTIL THE MOTORCYCLE WAS RETURNED TO DUCATI AS PART OF A LEMON LAW BUYBACK. THE STALLING IS A SAFETY ISSUE AND IS MUCH MORE PREVALENT AND SERIOUS THAN DUCATI WOULD LIKE T… | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Service Brakes, Hydraulic | 1100.0%ODI 11425862 · 1,500 miThe contact owns a 2015 Ducati Monster 821. The contact stated that while riding at a moderate rate of speed, the rear brakes failed as the motorcycle began to roll backward. The contact notified the dealer of the failure and expressed his concern about the dangers of a possible failure. The vehicle was towed to the dealer. The brake lines were bled, and the motorcycle was repaired. Upon speaking with the dealer, he was informed that they were aware of the potential failure with the brakes however, no action was taken. The contact felt unsafe o… | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. |
Darker cells indicate a larger share of submitted complaints. Components overlap. This measures complaint composition, not failure probability.
Failure mileage by component
Median and middle 50% of usable owner-reported mileages. Ranges require at least five records.
| Component | Mileage range (25th–75th percentile) | Median | Usable records | Examples |
|---|---|---|---|---|
| No usable records for this analysis. | ||||
Complaint and recall timeline
Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.
Solid line: filed complaints. Dashed amber lines: recall announcement dates for this vehicle selection; markers include all recall components. The latest month is partial. Temporal proximity does not establish causation.
Monthly counts, recall campaigns and complaint examples
| Month | Complaints | Campaigns announced | Examples |
|---|---|---|---|
| 2024-10 | 0 | None | No examples available for this selection. |
| 2024-11 | 0 | None | No examples available for this selection. |
| 2024-12 | 0 | None | No examples available for this selection. |
| 2025-01 | 0 | None | No examples available for this selection. |
| 2025-02 | 0 | None | No examples available for this selection. |
| 2025-03 | 0 | None | No examples available for this selection. |
| 2025-04 | 0 | None | No examples available for this selection. |
| 2025-05 | 0 | None | No examples available for this selection. |
| 2025-06 | 0 | None | No examples available for this selection. |
| 2025-07 | 0 | None | No examples available for this selection. |
| 2025-08 | 0 | None | No examples available for this selection. |
| 2025-09 | 0 | None | No examples available for this selection. |
| 2025-10 | 0 | None | No examples available for this selection. |
| 2025-11 | 0 | None | No examples available for this selection. |
| 2025-12 | 0 | None | No examples available for this selection. |
| 2026-01 | 0 | None | No examples available for this selection. |
| 2026-02 | 0 | None | No examples available for this selection. |
| 2026-03 | 0 | None | No examples available for this selection. |
| 2026-04 | 0 | None | No examples available for this selection. |
| 2026-05 | 0 | None | No examples available for this selection. |
| 2026-06 | 0 | None | No examples available for this selection. |
| 2026-07 | 0 | None | No examples available for this selection. |
| 2026-08 | 0 | None | No examples available for this selection. |
| 2026-09 (partial) | 0 | None | No examples available for this selection. |
Emerging complaint spikes
Complete months in the latest six months with at least 10 complaints, at least twice the preceding 12-month average, and at least three square-root deviations above that average.
This is a descriptive screening rule, not a statistical defect finding. Publicity and reporting changes can increase submissions.
No complete months meet the spike thresholds for this selection.
Equal-age model-year comparison
Model-wide cumulative reports during the first three or five calendar years, starting with the model year (age 0). Only fully elapsed windows are compared.
2020: 0 complaints · 2021: 0 complaints
| Model year | Through age 0 | Through age 1 | Through age 2 |
|---|---|---|---|
| 2020 | 0 | 0 | 0 |
| 2021 | 0 | 0 | 0 |
Date coverage across each selected cohort
| Year | Incident dates used | Filing date fallbacks | Excluded dates |
|---|---|---|---|
| 2020 | 0 | 0 | 0 |
| 2021 | 0 | 0 | 0 |
Incident date is preferred when valid and no later than filing; otherwise filing date is used. Model year approximates age. Equal observation time does not adjust for sales, distance driven or reporting delays. One complaint linked to multiple model years can appear in each cohort.
Components reported together
Each cell counts unique complaints naming both components. Open a nonzero cell for examples.
| Component |
|---|
| No usable records for this analysis. |
Co-reporting does not establish that one component caused another concern.
Recurring narrative patterns
Specific keyword mentions beyond broad component labels. Matching includes negations and comparisons and does not confirm a diagnosis.
0 patterns with matching reports.
No narratives match the published patterns.