A fractured ground wire in a 2024-2026 Ford Mustang's engine bay can kill the headlights, the wipers, the air conditioning, the engine cooling fan, or the engine's drive power itself, and it can happen without warning. Ford is recalling 148,663 Mustangs over exactly that fault, according to NHTSA campaign 26V547000 and Ford's own recall number 26C40.
What's Actually Failing
The problem sits in the engine-compartment wiring harness. Ground eyelet terminals there can fatigue over time and fracture, according to the recall filing cited by CBS News and Forbes. Depending on which connection breaks, a driver can lose propulsion, one or both headlights, windshield washer function, air conditioning, or the engine cooling fan. Any of those failing mid-drive is a real crash risk, not a warning-light inconvenience.
Ford traced the defect to vehicles built at its Flat Rock, Michigan plant between September 7, 2022, and June 9, 2026, spanning the 2024, 2025, and 2026 model years. Remedy letters describing the issue went out between August 31 and September 4, 2026. A second round of letters, once a permanent fix ships, isn't expected until no later than March 31, 2027. In the meantime, dealers can replace the affected ground terminals.
Which Mustangs Are Covered
| Detail | Figure |
|---|---|
| Vehicles affected | 148,663 |
| NHTSA campaign | 26V547000 |
| Model years | 2024, 2025, 2026 |
| Production window | Sept 7, 2022 - June 9, 2026 |
| Assembly plant | Flat Rock, Michigan |
| Notification letters | Aug 31 - Sept 4, 2026 |
| Remedy parts available by | March 31, 2027 |
Production dates overlap model years by several months, so don't assume your build date from the model year alone. A VIN check is the only reliable way to confirm coverage.
A Pattern, Not a One-Off
This is the S650 generation's fifth distinct safety recall since launch. Campaign 23V800000 covered a mis-assembled brake pedal that carried a do-not-drive order. Campaign 24V593000 found casting defects in the rear suspension knuckles, with documented loss of handling and steering. Campaign 24V394000 flagged a manual-transmission clutch line routed too close to the exhaust manifold, capable of melting and disabling the clutch. Campaign 26V418000, still open as of mid-2026 with no shipped remedy, covers a wiper motor that loses communication with the steering column below freezing. The wiring harness fault is the newest addition to that list, and the biggest by vehicle count.
None of this means the S650 is a bad car to own. Consumer Reports scored 2024 owner surveys ahead of the BMW 4 Series and Honda Civic Si in the same segment. It means the current Mustang generation has drawn an unusually active recall record in its first three model years, and a used buyer needs to treat VIN verification as a standard step, not an afterthought.
If You're Buying a Used S650 Mustang
Get the VIN before you commit to anything, not after. CarScout's snapshot from August 30, 2026 shows 1,787 listings for the 2024 Mustang nationally, priced from $14,900 to $149,500, so there's real inventory to compare once you've screened out cars with unresolved safety work. An open recall isn't automatically a reason to walk. The repair is free at any Ford or Lincoln dealer. What matters is getting written confirmation from the seller, or from Ford directly, that the fix has actually been completed rather than just scheduled.
Before you buy a used S650 Mustang, or any car carrying an open campaign, run the VIN through CarScout's free recall lookup tool to see exactly what's outstanding.
FAQ
How do I know if my Mustang is included in the recall? Ford's recall covers 148,663 Mustangs built between September 2022 and June 2026 across the 2024, 2025, and 2026 model years, tracked under NHTSA campaign 26V547000. Enter your 17-digit VIN at Ford's recall lookup site or NHTSA.gov to confirm coverage; the production window overlaps model years, so the model year alone won't tell you.
What if I'm about to buy a used 2024-2026 Mustang? Ask the seller for the VIN before you sign anything, then check it against open Ford campaigns. An open recall doesn't have to be a dealbreaker since the repair is free, but you want proof the work is done, not a promise it's scheduled.
Is this the S650 Mustang's first major recall? No. Since launching for 2024, the S650 has drawn separate campaigns for a mis-assembled brake pedal that triggered a do-not-drive order, cracked rear suspension knuckles, a clutch line routed too close to the exhaust, and a wiper motor that fails in cold weather. The wiring harness fault is the fifth distinct safety campaign on the newest Mustang generation's first three model years.