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A proposed class action lawsuit claims certain Land Rover and Range Rover mild hybrid SUVs are equipped with defective DC/DC converters that can fail and potentially cause a complete loss of drive power and exterior lighting. The lawsuit alleges the issue creates a safety risk for owners and could increase the likelihood of a crash.
What is the alleged problem?
The lawsuit concerns vehicles equipped with both a 48-volt mild hybrid system and a conventional 12-volt electrical system. The DC/DC converter connects these systems by reducing the higher voltage from the hybrid battery so it can charge the 12-volt battery and operate lower-voltage electrical equipment.
According to the complaint, an internal fault involving a microchip inside the converter can cause the component to fail. If this happens, the 12-volt battery may rapidly lose its charge, potentially resulting in electrical faults, loss of drive power, exterior lighting failures, and problems with lane-keeping assistance.
The lawsuit involves certain 2020-2024 Land Rover Range Rover, 2019-2024 Range Rover Sport, 2021-2024 Range Rover Velar, 2020-2023 Range Rover Evoque, 2021-2024 Land Rover Discovery, 2020-2024 Land Rover Defender and 2020 Land Rover Discovery Sport vehicles.
What owners should know
The proposed class action was filed against Jaguar Land Rover North America in July 2026 and alleges that the company knew about the converter problem but failed to adequately disclose or resolve it. The lawsuit follows a separate April 2026 recall covering 170,169 Jaguar and Land Rover mild hybrid vehicles.
NHTSA said a DC/DC converter failure could prevent the 12-volt system from charging, potentially resulting in a complete loss of drive power and exterior lighting. At the time of the recall, the remedy was still under development. Owners experiencing electrical warnings, unexpected power loss, or repeated converter-related problems should keep repair orders, diagnostic records, and communications with dealerships.
What Land Rover owners may want to consider
When an electrical defect affects a vehicle’s ability to remain powered and operate essential systems, the consequences can extend beyond an inconvenient trip to the dealership.
If your Land Rover or Range Rover has suffered a converter failure, unexpected loss of power, or repeated electrical problems, The Lemon Firm can help you take a closer look at the circumstances surrounding your vehicle.
Reach out to our team to discuss what you have experienced and whether your situation may qualify for further assistance.