Ducati · Motorcycle Issues

2021 Ducati Monster Problems: 1 Known Issue

2021 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated November 2026

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Ducati Monster has 1 documented issue, with 1 rated critical. The most serious is Rear brake hoses can let in air or be damaged by exhaust heat — recalls 21V315 and 21V335.

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On the 2014-2021 Ducati Monster, two separate recalls cover the rear brake hoses. Under 21V315, gas can permeate the rear hose material and reduce rear brake effectiveness, lengthening stopping distances. Under 21V335, a rear hose material with lower heat resistance, exposed in one area to hot exhaust-manifold airflow, can be damaged and fail suddenly, losing rear brake function and increasing the risk of a crash; the front brake is a separate hydraulic system and is not affected. Applies to: 21V315: 2017–2020 Monster 797 and Monster 1200, and 2018–2020 Monster 821, that had not already received the hose-update bulletin (CR188, CR193 or CR191). 21V335 (Ducati SRV-RCL-21-010 / CR217): Monster 821 MY 2015–2021, Monster 1200 S/standard MY 2014–2021 and Monster 1200 R MY 2016–2019 that left the factory with, or later received, the newer hose material. Bulletin SRV-TSB-21-010 (CR222) separately has dealers check rear pedal travel on 2015–2017 Monster 821, 2014–2016 Monster 1200 S/standard and 2016–2019 Monster 1200 R and replace the hoses if required. Eligibility is by VIN; a bike can be in more than one campaign.

Common Symptoms

Increased rear-brake pedal travel or reduced rear braking
Visible rear-hose damage or fluid loss
Rear braking can fail suddenly if a heat-damaged hose ruptures

How to Fix

Ducati dealers replace the applicable rear hoses free for eligible recall VINs. The heat-damage remedy extends the rigid metal section to move the flexible material away from exhaust airflow. The dealer must use the correct campaign, hose version and model-specific filling/bleeding procedure. For the older models covered by separate TSB CR222, Ducati specifies traditional primary-circuit bleeding under SRV-TTB-17-002 (1200) or SRV-TTB-17-003 (821); that bulletin does not require an owner reverse-bleed experiment. Prior qualifying repair costs may be submitted for reimbursement, subject to Ducati's plan, not an automatic guarantee.

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High ConfidenceVerifiedUpdated Oct 20, 2026

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Frequently Asked Questions

What are the most common Ducati Monster problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Ducati Monster has 1 documented issue. The documented issue is: Rear brake hoses can let in air or be damaged by exhaust heat — recalls 21V315 and 21V335. Of these, 1 is rated critical and should be addressed promptly.

Is the Ducati Monster reliable?

The 2021 Ducati Monster has 1 known issue compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: Rear brake hoses can let in air or be damaged by exhaust heat — recalls 21V315 and 21V335. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

What is the 2014-2021 Ducati Monster Rear brake hoses can let in air or be damaged by exhaust heat — recalls 21V315 and 21V335?

Two separate recalls cover the rear brake hoses. Under 21V315, gas can permeate the rear hose material and reduce rear brake effectiveness, lengthening stopping distances. Under 21V335, a rear hose material with lower heat resistance, exposed in one area to hot exhaust-manifold a… Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public motorcycle data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.