Propulsion system: dc/dc converterRecall 23V-478 · Lexus and Toyota vehicles
Toyota Motor Engineering & Manufacturing recall 23V-478 covers 43,442 Lexus and Toyota vehicles for a propulsion system: dc/dc converter problem, reported to NHTSA on July 12, 2023. The manufacturer's latest report (2025 Q3) shows 93% of affected vehicles repaired.
Source: NHTSA recall 23V478000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2021-2022 RAV4 Prime and 2022 Lexus NX450h+ plug-in hybrid electric (PHEV) vehicles. The electric current rectifying module contained within the DC-DC converter may have been damaged during production, which can result in an electrical short-circuit.
The risk
A short circuit can cause the DC-DC converter to overheat, increasing the risk of a vehicle fire.
The fix
Owners are advised not to charge their vehicles when the ambient air temperature is below or expected to drop below 41 degrees Fahrenheit (5 degrees Celsius). Dealers will replace the DC-DC converter, free of charge. Owner notification letters were mailed December 29, 2023. Owners may contact Toyota's customer service at 1-800-331-4331. Toyota's number for this recall is 23TB07/23LB01.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
93%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA. 703 vehicles were listed as unreachable.