Recall 21V356 affects 70 2020-2021 Roadtrek Zion SRT, Play, and Zion motorhomes for AGM generator regulator failure. Roadtrek dealers inspect and repair the generator free.
Roadtrek is recalling 70 2020-2021 Zion SRT, Play, and Zion motorhomes because the undermount generator's internal regulator can damage the AGM house batteries and cause electrical system failure. Damaged battery caps can detach, and replacing a damaged AGM battery with a lead-acid battery can lead to an acid spill; Roadtrek dealers will complete the repair free of charge.
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What's wrong?
The alternator on these 2020-2021 Roadtrek Zion SRT, Play, and Zion motorhomes is an undermount generator for the coach electrical system. It charges the absorbed glass mat house batteries, the batteries that run the living-area systems when the motorhome is using coach power. A voltage regulator inside the alternator is supposed to keep that charging output within a safe range.
On affected motorhomes, the internal regulator is faulty. Roadtrek says the defective alternator uses a black voltage regulator, while the correct alternator uses a brown regulator. When the regulator overcharges the house batteries, it can damage the AGM batteries and lead to coach electrical system failure.
Owners can watch the RV display panel for voltage above 16 volts. Other warning signs include a loud popping sound from underneath the vehicle when AGM battery caps come loose, or reduced run time on battery power for the coach system. These signs involve the coach electrical system, not the primary vehicle electrical system.
Who's affected?
Covers Zion, Zion SRT, and Play RVs across the 2020 and 2021 model years, with both recreational-vehicle equipment and alternator electrical-system listings.
| 2020 Roadtrek Zion SRT | Recreational vehicle/trailer |
|---|---|
| 2020 Roadtrek Zion SRT | electrical system |
| 2021 Roadtrek Play | Recreational vehicle/trailer |
| 2021 Roadtrek Play | electrical system |
| 2020 Roadtrek Play | Recreational vehicle/trailer |
| 2020 Roadtrek Play | electrical system |
| 2021 Roadtrek Zion SRT | Recreational vehicle/trailer |
| 2021 Roadtrek Zion SRT | electrical system |
| 2021 Roadtrek Zion | Recreational vehicle/trailer |
| 2021 Roadtrek Zion | electrical system |
| 2020 Roadtrek Zion | Recreational vehicle/trailer |
| 2020 Roadtrek Zion | electrical system |
| Units affected | 70 |
| Field incidents | NHTSA has logged no field incidents to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific RV is included.
What's the safety risk?
Damaged AGM battery caps can detach, and the wrong replacement battery can spill acid, increasing the risk of injury. Watch for a coach display over 16 volts, a loud pop underneath, or reduced coach battery run time. If you see those signs, stop using the coach battery system and contact the dealer. Repair is free at any franchised Roadtrek dealer.
What should I do?
- Check your VIN to confirm your 2020-2021 Roadtrek Zion SRT, Play, or Zion motorhome is included in this recall.
- Contact your nearest franchised Roadtrek dealer to schedule the free inspection and undermount AGM generator replacement if needed, which fixes the regulator problem that can damage the house batteries.
- Bring the recall notice if you received it, and reference recall number 21V356 when you call.
- Avoid replacing damaged AGM house batteries with lead-acid batteries before the dealer inspects the motorhome.
- Call Roadtrek customer service at 1-888-762-3873 with questions about scheduling or battery damage.
What happens at the repair
At the dealer, a Roadtrek technician inspects the undermount AGM generator that charges the house batteries and replaces the generator if the inspection shows the faulty internal regulator is present. The recall repair is free, including parts and labor. Roadtrek has a general reimbursement plan on file for owners who already paid for this related repair. Bring repair paperwork and proof of payment, or contact Roadtrek customer service at 1-888-762-3873 for the reimbursement path.
| Reimbursement | Reimbursement available |
|---|
Timeline
| May 14, 2021 | NHTSA published the recall |
|---|---|
| May 24, 2021 | Dealer notification began |
| May 26, 2021 | Owner notification mailed |
| May 28, 2021 | Dealer notification ended |
| May 31, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V356?
Recall 21V356 covers 70 2020-2021 Roadtrek Zion SRT, Play, and Zion motorhomes with an undermount AGM generator regulator defect. The defect can damage AGM house batteries, let battery caps detach, or lead to an acid spill after the wrong replacement battery is installed, increasing injury risk.
What should I do if my 2020-2021 Roadtrek Zion SRT, Play, or Zion is on this recall?
Check your VIN to confirm your specific motorhome is included in recall 21V356. If it is, contact a Roadtrek dealer to schedule the generator inspection and replacement if needed. Reference recall number 21V356 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Roadtrek dealers will inspect the undermount AGM generator and replace it if needed, free of charge.
What is the safety risk in recall 21V356?
The safety risk is injury from damaged AGM battery caps or an acid spill. NHTSA campaign 21V356 says damaged caps can detach, and a damaged AGM battery replaced with a lead-acid battery can lead to an acid spill.
When were owners notified about recall 21V356?
Roadtrek mailed owner notification letters on May 26, 2021. If you bought the motorhome used or never received the letter, check your VIN and call Roadtrek customer service at 1-888-762-3873 or a Roadtrek dealer with recall number 21V356.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V356000 |
|---|---|
| Roadtrek customer service | 1-888-762-3873 |
| NHTSA recall # | 21V356 |
| NHTSA recall # (full) | 21V356000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (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 23, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →