Recall 21V289 affects 20 2019-2021 Rev Ambulance Type Ix and Type I vehicles for LCD display lockups. Replacement display is free through Rev Ambulance.
Rev Ambulance is recalling 20 2019-2021 Type I and Type Ix vehicles because the Weldon V-Mux Vista IV LCD display can lock up or stop working, cutting off controls for emergency lighting and HVAC. A failed display can delay emergency efforts and increase injury risk; Rev Ambulance dealers will complete the repair free of charge.
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What's wrong?
The V-MUX Vista Interface in 2019-2021 Rev Ambulance Type Ix and Type I ambulances is the Vista screen in the instrument panel. It is an LCD display, meaning a flat electronic screen, used to control emergency vehicle lighting and HVAC, the heating and air conditioning system. Crews depend on that screen to select and confirm those body-control functions.
On affected ambulances, the display is vulnerable to low-voltage spikes from the vehicle's electrical installation. A spike can cause the Vista screen to lock up or stop working. When that happens, the screen no longer responds normally, so lighting and HVAC controls tied to the display are unavailable from that interface.
There is no warning sign before failure. The first thing an operator would notice is the screen locking up, going blank, or no longer responding to touch or control inputs.
Who's affected?
Covers Type Ix and Type I ambulance configurations across the 2019, 2020, and 2021 model years, all tied to the same instrument panel component.
| 2021 Rev Ambulance Type Ix | instrument panel |
|---|---|
| 2020 Rev Ambulance Type Ix | instrument panel |
| 2019 Rev Ambulance Type I | instrument panel |
| 2021 Rev Ambulance Type I | instrument panel |
| 2019 Rev Ambulance Type Ix | instrument panel |
| 2020 Rev Ambulance Type I | instrument panel |
| Units affected | 20 |
| 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 vehicle is included.
What's the safety risk?
A locked or non-functional LCD display can delay emergency efforts and increase the risk of injury. If the display locks up or stops working, treat it as a safety issue and schedule the recall repair soon. Repair is free at any franchised Rev Ambulance dealer.
What should I do?
- Check your VIN to confirm your 2019-2021 Rev Ambulance Type Ix or Type I is included in this recall.
- Contact Rev Ambulance customer service at 1-855-661-9232 to arrange the free Weldon V-Mux Vista IV LCD display replacement that fixes the lockup affecting emergency lighting and HVAC controls.
- Bring the recall notice if Rev Ambulance mailed one. If not, reference recall number 21V289 when you call.
- Limit emergency service use until the display is repaired if the lighting or HVAC controls lock up or stop responding.
What happens at the repair
At the dealer, a Rev Ambulance technician replaces the Weldon LCD display used to control emergency vehicle lighting and HVAC functions. The replacement display is provided free of charge, and parts and labor are covered under the recall. If you paid out of pocket for this display repair before the recall notice, REV has a general reimbursement plan on file for eligible documented expenses. Ask REV customer service or the service desk what documentation they need for a reimbursement claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| April 23, 2021 | NHTSA published the recall |
|---|---|
| April 27, 2021 | Dealer notification began |
| April 27, 2021 | Interim owner notification (was planned for this date) |
| May 5, 2021 | Owner notification mailed |
| May 10, 2021 | Dealer notification ended |
Frequently asked questions
What is recall 21V289?
Recall 21V289 covers 20 2019-2021 Rev Ambulance Type Ix and Type I vehicles with Weldon V-Mux Vista IV LCD displays. Low voltage spikes can make the display lock up or stop working, affecting emergency lighting and HVAC controls.
What should I do if my 2019-2021 Rev Ambulance Type Ix or Type I is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V289. If it is, contact REV customer service at 1-855-661-9232 and ask about the Weldon replacement display. Reference recall number 21V289 when you call.
Is the recall repair free?
Yes. Federal recall law requires the recall repair to be performed at no cost, and REV's remedy says Weldon, a division of Akron Brass, will provide the replacement display free of charge.
What is the safety risk?
The safety risk is delayed emergency response. If the LCD display locks up or stops working, emergency vehicle lighting and HVAC controls can be affected, which can delay emergency efforts and increase the risk of injury.
When were owners notified about recall 21V289?
Owner notification letters were mailed on May 5, 2021. If you own one of these Rev Ambulance vehicles and never received a letter, check your VIN and contact REV customer service with recall number 21V289.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V289000 |
|---|---|
| Rev Ambulance customer service | 1-855-661-9232 |
| NHTSA recall # | 21V289 |
| NHTSA recall # (full) | 21V289000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Owner Notification Letter (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 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →