Autoblog and Yahoo may earn commission from links in this article.Mild-Hybrid with a Major IssueA class action has been filed against JLR over its mild-hybrid powertrains, particularly those fitted to several Land Rover models from the 2019 to 2024 model years. Given that a good chunk of Land Rovers already came with mild-hybrids by that time, the claimed defect may be lurking in thousands of vehicles on the road without the owners knowing about it.The suit claims JLR knew about the alleged problem for years and failed its obligations to honor warranty claims. While a recall was eventually issued, the company reportedly did not repair or replace the affected vehicles.Land RoverThe Root CauseAccording to the class-action lawsuit, the issue stems from the faulty DC-DC converters fitted to mild-hybrid models. The recall was announced a few months ago, affecting 170,169 vehicles. There is still no resolution for the matter at the time of writing.AdvertisementAdvertisementThe recall report says the system regulating the 48V system fails and reverts to 12V current. Unable to manage the electrical load, it then leads to the eventual shutdown of the vehicle, leaving its owners stranded. The vehicle warns the owner of impending failure within ten seconds of the fault being detected. Land Rover has recommended pulling over as soon as possible, once safe, should the warning pop up.In our previous report, it was mentioned that other failure warnings will appear on the dash. If the driver keeps moving, the vehicle will shift itself into neutral, show a transmission fault, shut down auxiliaries such as exterior lights and the climate control, and eventually, the engine shuts off. The suit claims that it's incredibly dangerous if owners are faced with that situation. With no official fix in place in the meantime, the 'wait and see' response has made more than enough disgruntled owners file the class action lawsuit.What Models are Affected?If we're being honest, it's nearly all of the cars Land Rover makes. It affects Range Rover and Defender models from 2020 to 2024, Discovery and Range Rover Velars from 2021 to 2024, Range Rover Evoque from 2020 to 2023, 2019 to 2024 Range Rover Sport, and 2020 Discovery Sport. Some Jaguars are hit, too, namely the E-Pace from 2021 to 2022 and the F-Pace from 2021 to 2024.The issue isn't just for North American models, either, as there are also reports of failures in Europe. Worse still, even the mild-hybrid diesels aren't spared from the DC-DC fault, and more recently, there's been yet another recall for airbags on certain models. These issues aren't helping JLR's bottom line at all, and the company must act swiftly to restore buyer confidence.Land RoverThis story was originally published by Autoblog on Jul 22, 2026, where it first appeared in the News section. Add Autoblog as a Preferred Source by clicking here.