Jaguar Land Rover North America has told federal regulators that 23,677 vehicles carry a DC-DC converter that can malfunction and, in the worst case, leave a driver with no propulsion and no exterior lights. The company filed the paperwork with the National Highway Traffic Safety Administration on September 17, 2026, and the agency logged it as campaign 26V599000. Nine model lines from the 2019 through 2024 model years are named in the filing, split between the Land Rover and Jaguar brands.
A single converter sitting between the 12-volt system and the road
The component at the center of the filing is the DC-DC converter, which NHTSA classifies under the electrical system and the propulsion system at once. That dual classification matters because the part does not simply feed a stereo or a phone charger. When it stops working, the vehicle stops charging its 12-volt system, and the record describes what follows in a single chain: loss of 12-volt charging, then complete loss of drive power and exterior lighting.
Lighting and drive power failing from the same root is what separates this from a nuisance electrical fault. A driver who loses headlights on an unlit road while the vehicle also stops delivering power has little time to react, and nothing in the record suggests a warning period that is guaranteed. NHTSA’s wording describes the sequence only as a loss of charging that can lead to the loss of power and light, so the real-world lead time between the first symptom and a stalled vehicle is not something the filing quantifies. That gap is exactly what makes a crash-risk finding hard to wave away as a convenience issue.
Two failure paths and what NHTSA says they risk
The NHTSA record for campaign 26V599000 lays out two separate ways the converter can fail. The first is physical: “The DC-DC converter may malfunction due to an electrical overload that can occur during high power demand.” The second is a software error that can stop the converter working at vehicle start-up, so a vehicle could in principle fail to bring the 12-volt system up at the moment it is switched on.
NHTSA states the hazard plainly in the same record: “A loss of drive power increases the risk of a crash.” The filing does not flag the vehicles as park-it or park-outside cases, and it lists no over-the-air update, so owners are not being told to stop driving, and the fix cannot arrive wirelessly.
Nine model lines, 2019 to 2024, and an earlier recall they extend
The affected vehicles are the Jaguar F-PACE and E-PACE, and the Land Rover Range Rover, Range Rover Sport, Range Rover Evoque, Range Rover Velar, Defender, Discovery and Discovery Sport. The record spreads them across 42 make, model and model-year entries, with the earliest, the Range Rover Sport, reaching back to the 2019 model year and the newest running through 2024. Coverage is uneven within each line: the Jaguar models start at 2021, while the Range Rover is listed for 2020, 2021, 2023 and 2024 only.
This is not the first time the same failure has surfaced. The filing says it expands an earlier campaign, and the record for 26V248, received April 17, 2026, describes mild-hybrid vehicles where “insufficient electrical load balancing during times of high demand can lead to a current overload condition.” That earlier campaign covered 170,169 potential units and used near-identical language about losing 12-volt charging, drive power and exterior lighting. Its owner letters went out on June 17, 2026. The new campaign counts its 23,677 units separately, so the two figures describe different populations and should not be read as one total.
A software remedy and letters due November 13
The remedy is a software update performed by dealers at no cost to owners. The final fix is not yet available: the filing says interim notification letters are expected to be mailed on November 13, 2026, with further letters to follow once the remedy itself is ready. Until then, owners of the named models have a software repair on the way but no date at which it can be applied.
Anyone unsure whether a vehicle is included can enter its vehicle identification number on NHTSA’s recall lookup, which reflects open campaigns by VIN. Land Rover customer service is listed in the record at 800-637-6837, and the manufacturer’s own recall number for this action is E008. Notification duties for manufacturers are set out in federal regulation 49 CFR Part 577, which governs the content and timing of owner letters.
The filing also appeared in NHTSA’s wider recalls dataset for reports received since September 12, 2026, alongside other recent submissions, which is how the campaign can be matched against the manufacturer’s report date of September 17. The Park It and Park Outside flags are both set to no in the record, and the Notes field is empty, so the only owner-facing instructions are the letters, the dealer software update and the customer service line.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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