Urgent Lexus Recall: NX 450h+ plug-in hybrid DC-DC Converter fire issue – owners should stop using the charging cable immediately, or risk fire.

Lexus has issued an urgent safety recall on all 154 NX 450h+ plug-in hybrid electric vehicle (PHEV) due to fire risks.

The issue revolves around the plug-in hybrid system. The DC-DC converter reduces the power voltage from the Hybrid Vehicle battery to charge the on-board 12V battery. The current rectifying module on the circuit board in the converter may have been damaged during production and could short circuit.

The short circuit lets 12V current from the 12V battery to continue back to the module which in turn would heat up. This heat could be sufficient overheat other component resulting in a fire.

The free DC-DC converter replacement takes around 75 minutes, but the time the vehicles spends in the service department may be longer. Lexus has advised owners should not to use the AC Plug-In Charger until the DC-DC converter has been replaced. Until then, the car is perfectly safe to drive.

Lexus owners can call the Lexus Customer Assistance Centre on 1800 023 009 (Monday to Friday 8.00am to 6.00pm AEDT) or visit: www.lexus.com.au/owners/update-details, making sure they have the 17-digit Vehicle Identification Number (VIN) on hand.

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ABOVE: Lexus NX models

FAQ

Q1 Which and how many models are involved in Australia?

A1. There are 154 Lexus 450h+ PHEV customer vehicles involved in the Australian market.

MODEL NAME MODEL CODE WMI VDS CD VIN RANGE PRODUCTION RANGE
FROM TO FROM TO
NX450h AAZH26R JTJ CKBFZ # 2000170 2006634 15th Nov 2021 27th May 2022

Note: 1. Although the involved vehicles are within the above VIN ranges, not all vehicles in these VIN ranges were sold in the Australian market.

  1. (#) indicates additional check digit (alpha or numeric).

Q2: What is the condition?

A2: The plug-in hybrid system of the involved vehicles includes a DC-DC converter. Contained within the DC-DC converter is a current rectifying module which reduces the voltage of the electricity from the High Voltage (HV) battery in order to charge the vehicle’s 12V battery. Some of these modules may have been damaged during production and could short circuit. If the module does short circuit, under certain conditions, excessive heat may be generated and components within and outside the DC-DC converter could sustain thermal damage, increasing the risk of a vehicle fire.

Q3: What does the remedy involve?

A3: For all involved vehicles, Lexus Dealers will replace the DC-DC converter free of charge to vehicle owners.

Q4: How long will the remedy take?

A4: To replace DC-DC converter will take approximately 75 minutes; however, depending on the Dealer’s work schedule, owners may be required to make the vehicle available for a longer period of time.

Q5: Can I continue to drive my vehicle?

A5: Yes, owners may continue to drive their vehicle; however, we request owners contact their local/preferred Lexus Dealer to arrange recall completion. Owners with additional questions or concerns are asked to please contact their local Lexus Dealer in the first instance, or the Lexus Customer Assistance Centre on 1800 023 009 from 8am – 6pm AEDT Monday to Friday.

Q6: Can I continue to charge my vehicle via Plug-In Charger?

A6: No, owners are requested to cease using the AC Plug-In Charger immediately; we request owners contact their local/preferred Lexus Dealer to arrange recall completion. Owners with additional questions or concerns are asked to please contact their local Lexus Dealer in the first instance, or the Lexus Customer Assistance Centre on 1800 023 009 from 8am – 6pm AEDT Monday to Friday.

Q7: How do I continue to drive my vehicle if I cannot use the AC Plug-In Charger?

A7: Your Lexus vehicle may continue to be driven without the need to use the AC Plug-In Charger and using premium unleaded fuel only.

Q8: Does this condition affect other Lexus models?

A8: Only the Lexus models listed in the VIN range in the table at question 1 are involved in the Australian market.

Q9: My vehicle is in the affected production range. What should I do?

A9: Please contact your closest/preferred Lexus Dealer to verify if your vehicle is affected. Owners with additional questions or concerns are asked to please contact their local Lexus Dealer in the first instance, or the Lexus Customer Assistance Centre.

Q10: Will my Lexus be fixed straight away once I make contact with my Lexus Dealer?

A10: We are prioritising the supply of the necessary parts. Your Lexus Dealer will confirm your service booking for the remedy at the earliest opportunity.

Q11: Where can I find my VIN?

A11: VIN number location varies by model. For information on how to find the VIN position specific to your vehicle, please search “vehicle identification number” in the alphabetical index at the rear of your Owner’s Manual.

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