Recall 21V795 affects 411 2020 Zero Sr/F motorcycles for loose rear rotor bolts. Repair is free at any franchised Zero dealer.
Zero is recalling 411 2020 Sr/F motorcycles because the rear rotor bolts were not tightened enough. Loose bolts can damage the caliper or swingarm, reduce rear braking capability, and increase crash risk; Zero dealers will complete the repair free of charge.
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What's wrong?
The rear brake rotor on a 2020 Zero Sr/F is the metal disc at the rear wheel that the brake caliper grips to slow the motorcycle. The rotor is held to the wheel assembly by bolts, and those bolts have to stay tight while the brake absorbs heat and vibration.
On affected motorcycles, the rear rotor bolts were tightened to 10 ft-lbs during manufacturing. Zero later determined that this torque was not enough and changed the specification to 26 ft-lbs. If a bolt backs out of its socket, it can move far enough to contact the caliper arm or swingarm and damage nearby parts.
The warning sign is a high-pitched, objectionable noise from the rear of the motorcycle. An inspection can also show damage to the caliper arm or swingarm after a bolt has backed out.
Who's affected?
| 2020 Zero Sr/F | hydraulic brake system |
|---|---|
| Units affected | 411 |
| Field incidents | NHTSA has logged 4 field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific motorcycle is included.
What's the safety risk?
Loose rear rotor bolts can damage the caliper or swingarm, reduce rear braking capability, and increase the risk of a crash. A high pitched, objectionable noise is a warning sign; visible damage can also show during inspection. If you hear that noise, stop riding and contact a dealer. Repair is free at any franchised Zero dealer.
What should I do?
- Check your VIN to confirm your 2020 Zero Sr/F is included in this recall.
- Contact a franchised Zero dealer to schedule the free rear-rotor-bolt tightening or replacement; the repair secures the loose bolts that can reduce rear braking capability.
- Bring the recall notice Zero mailed, or reference recall number 21V795 and Zero recall SV-ZMC-020-417 when you call.
- Ride cautiously until the repair is complete. Leave extra following distance and avoid hard rear braking.
What happens at the repair
At the dealer, a Zero technician correctly tightens the rear rotor bolts and replaces any rear rotor bolts that need replacement. The recall repair is free, with parts and labor covered. Zero has a reimbursement plan for documented qualifying expenses if you already paid for related rear rotor bolt repairs before the recall work was performed. Keep copies of repair invoices and payment records, then contact Zero customer service at 1-888-841-8085 to ask how to submit the claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| October 13, 2021 | NHTSA published the recall |
|---|---|
| October 18, 2021 | Dealer notification began |
| October 25, 2021 | Dealer notification ended |
| October 25, 2021 | Interim owner notification (was planned for this date) |
| November 1, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V795?
Recall 21V795 covers 411 2020 Zero Sr/F motorcycles with rear rotor bolts that were insufficiently tightened. Loose bolts can damage the caliper or swingarm, reduce rear braking capability, and increase crash risk. Zero dealers will tighten and replace the rear rotor bolts as necessary for free.
What should I do if my 2020 Zero Sr/F is on this recall?
Check your VIN to confirm your specific motorcycle is included in recall 21V795. If it is, contact a franchised Zero dealer to schedule the rear rotor bolt inspection, tightening, and replacement as necessary. Reference Zero recall number SV-ZMC-020-417 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to perform the recall repair at no cost. Zero dealers will correctly tighten and replace the rear rotor bolts as necessary, free of charge, for motorcycles included in recall 21V795.
What is the safety risk?
The safety risk is reduced rear braking capability. If the loose rear rotor bolts damage the caliper or swingarm, the motorcycle can have less rear brake function, which increases crash risk. Confirm your VIN and arrange the free dealer repair if your motorcycle is included.
When did Zero notify owners?
Zero mailed owner notification letters on November 1, 2021. If you bought the motorcycle used or never received a letter, check your VIN to confirm whether your 2020 Zero Sr/F is included, then contact a franchised Zero dealer for the free repair.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V795000 |
|---|---|
| Zero customer service | 1-888-841-8085 |
| NHTSA recall # | 21V795 |
| NHTSA recall # (full) | 21V795000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →