Ford Mustangs can lose drive power, headlights and air conditioning all at once

Ford is recalling 148,663 Mustangs built for the 2024 through 2026 model years because ground connections in the engine compartment’s wiring harness can fracture, cutting off drive power without warning while a driver is on the road. The same failure can simultaneously disable the headlights, the windshield washing system, the air conditioning and the engine cooling fan, according to the recall notice Ford filed with the National Highway Traffic Safety Administration on August 25.

“The engine compartment wiring harness ground connections may fracture and result in a loss of drive power,” the notice states, describing a defect that does not just strand a car in traffic but strips away the systems a driver would normally rely on to compensate, starting with the ability to see and be seen after dark.

Hardened Adhesive Turned a Wire Anchor Into a Stress Point

NHTSA traces the failure to a manufacturing step involving adhesive-lined heat-shrink tubing wrapped around the engine wiring. Adhesive from that tubing appears to have spilled over onto the wiring terminals, the metal eyelets that anchor individual wires to the vehicle’s frame, and hardened there before the vehicle left the factory.

That hardened adhesive kept the eyelets from sitting flush against the engine surface, so when workers bolted the eyelets down during assembly, the metal had to bend around the dried adhesive rather than seating flat. That bend created a stress point in metal that is otherwise built to flex slightly with normal engine vibration, and over time, vibration from ordinary driving can snap the eyelet at exactly that point, severing the ground connection it was supposed to maintain.

Ford has not said whether the flawed adhesive traced to a single supplier batch or a broader manufacturing change, only that wiring harnesses built across a production window spanning nearly four years show the same fracture-prone eyelets. That length of exposure is part of why the recall reaches 148,663 vehicles rather than a narrow batch tied to a few weeks of assembly-line output.

One Fractured Eyelet Can Take Out Five Separate Systems

Once a ground connection fails, the consequences reach well beyond the drivetrain. NHTSA’s notice lists the headlights, the windshield washing system, the washer fluid pump, the air conditioning system and the engine cooling fan as components that can all become inoperable from the same fractured eyelet, because each depends on a ground path that runs through the same compromised harness.

“An inoperable headlamp may reduce the driver’s visibility and/or make the vehicle less visible to other drivers, increasing the risk of a crash. An inoperable windshield washing system increases the risk of a crash,” the recall notice states, treating both failures as independent crash risks rather than mere inconveniences.

Warning Signs Arrive Before the Power Actually Cuts Out

Drivers are not left with zero notice. Ford says an affected vehicle may show a Check Engine light, another dashboard warning message, or an audible warning chime shortly before a sudden loss of power occurs, giving a driver a narrow window to pull over before the connection fails completely.

NHTSA estimates that about 1% of the 148,663 recalled Mustangs actually carry the defect, and the affected population spans vehicles built between September 7, 2022, and June 9, 2026, a production window Ford has not narrowed further publicly. Vehicle owners can check a specific VIN through NHTSA’s recall lookup tool to see whether their Mustang falls inside that range.

The 1% estimate works out to roughly 1,487 vehicles Ford expects to actually develop a fractured ground connection, a small fraction of the full recall population. NHTSA nonetheless requires the entire production run recalled because there is no way to know in advance, short of inspecting each vehicle individually, which ones received an eyelet bent around hardened adhesive during assembly and which did not. A sudden loss of drive power is also especially dangerous at highway speed, where a driver who loses acceleration mid-lane-change or mid-merge has far less time to react than a driver whose vehicle simply fails to start in a driveway.

Eight Warranty Claims Surfaced Before the Redesigned Part Existed

As of August 18, 2026, Ford had logged eight warranty claims related to the defect, four of which occurred within three months of the vehicle’s service date, and the company has reported no accidents, injuries or formal vehicle owner questionnaires tied to the issue so far. Dealers were notified of the recall on August 28, and Ford began mailing owner notification letters between August 31 and September 4.

The actual repair is not available yet. Ford says authorized dealers will replace the faulty terminals with redesigned, stronger metal parts at no cost once those parts are ready, but the company does not expect the full remedy to be available until March 2027, roughly seven months after the recall was filed. Owners can reach Ford Customer Service at 1-866-436-7332 or a local dealer in the meantime to confirm whether a specific Mustang is included.

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This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.