Recall 23V478 covers 43,442 2021-2022 Lexus NX450H+ and RAV4 Prime vehicles for DC-DC converter short-circuit risk. Repair is free at any franchised Lexus dealer.
Lexus is recalling 43,442 2021-2022 NX450H+ and RAV4 Prime plug-in hybrid vehicles under recall 23V478 because a damaged DC-DC converter rectifying module can short circuit. That short circuit can overheat the converter and increase fire risk, and Lexus dealers will complete the free repair.
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What's wrong?
The DC-DC converter in the 2021-2022 NX450H+ and RAV4 Prime manages electrical power for the plug-in hybrid system. Inside it, the current rectifying module helps turn hybrid battery output into lower-voltage power the vehicle uses for onboard electrical systems. That converter has to handle current cleanly without letting electricity flow where it should not.
This recall involves converters with a current rectifying module damaged during supplier production. If that module fails, its design lets the failure become a short circuit instead of simply opening the circuit and stopping current flow. That short circuit is the defect Toyota identified in campaign 23V478.
There is no warning sign before failure. An owner should not expect a sound, warning light, smell, or change in how the vehicle drives before the module shorts.
Who's affected?
Spans the NX450H+ and RAV4 Prime, with the same DC-DC converter listed in the electric propulsion system scope.
| 2022 Lexus NX450H+ | electric propulsion system |
|---|---|
| 2021 Toyota RAV4 Prime | electric propulsion system |
| 2022 Toyota RAV4 Prime | electric propulsion system |
| Units affected | 43,442 |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific SUV is included.
What's the safety risk?
A short circuit in the DC-DC converter can overheat the unit and increase the risk of a vehicle fire. Until the converter is replaced, follow the recall charging guidance: do not charge when the outside temperature is below or expected to drop below 41 degrees Fahrenheit. Repair is free at any franchised Lexus dealer.
What should I do?
- Check your VIN to confirm your 2021-2022 Lexus NX450H+ or Toyota RAV4 Prime is included in this recall.
- Contact a franchised Lexus or Toyota dealer to schedule the free DC-DC converter replacement that fixes the short-circuit fire risk.
- Avoid charging the vehicle when the outside temperature is below or expected to drop below 41 degrees Fahrenheit (5 degrees Celsius) until the repair is complete.
- Bring the recall notice if you have it. If not, reference recall number 23V478 and Toyota recall 23TB07/23LB01 when you call.
What happens at the repair
At the dealer, a Lexus technician replaces the DC-DC converter covered by recall 23V478. Parts and labor are free under the recall. Until that repair is complete, do not charge the vehicle when the outside temperature is below 41 degrees Fahrenheit or expected to drop below 41 degrees Fahrenheit. If you already paid to have this condition repaired before the campaign, the owner letter directs you to seek reimbursement under Toyota's General Reimbursement Plan. Bring repair documentation to the Lexus service desk and ask them to start the reimbursement claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 12, 2023 | NHTSA published the recall |
|---|---|
| July 12, 2023 | Dealer notification began |
| July 12, 2023 | Dealer notification ended |
| August 7, 2023 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| August 7, 2023 | Interim owner notification (was planned for this date) |
| December 29, 2023 | Owner notification mailed |
Frequently asked questions
What is recall 23V478?
Recall 23V478 covers 43,442 2021-2022 Lexus NX450H+ and Toyota RAV4 Prime plug-in hybrid vehicles. The DC-DC converter has a damaged electric current rectifying module that can short circuit, overheat, and increase fire risk. Dealers will replace the DC-DC converter for free.
What should I do if my 2021-2022 Lexus NX450H+ or Toyota RAV4 Prime is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 23V478. If it is, contact a franchised Lexus or Toyota dealer to schedule the free DC-DC converter replacement. Until the repair is complete, do not charge the vehicle when the air temperature is below or expected to drop below 41 degrees Fahrenheit.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and the recall remedy says dealers will replace the DC-DC converter free of charge. Parts and labor are covered at a franchised Lexus or Toyota dealer.
Is it safe to charge my plug-in hybrid before the recall repair?
Do not charge the vehicle when the ambient air temperature is below or expected to drop below 41 degrees Fahrenheit. The recalled DC-DC converter can short circuit and overheat, which increases fire risk. Schedule the free replacement before returning to normal charging in cold weather.
When were owner letters mailed for recall 23V478?
Owner notification letters were mailed December 29, 2023. If you bought the vehicle used or never received a letter, the VIN check is still the deciding step. Reference recall 23V478 and Toyota recall number 23TB07/23LB01 when you call the dealer.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/23V478000 |
|---|---|
| Lexus customer service | 1-800-331-4331 |
| NHTSA recall # | 23V478 |
| NHTSA recall # (full) | 23V478000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
- Download Misc. Document (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 →