The seventh-generation (S650) Mustang started production in May 2023 as a 2024 model, with a 315-hp 2.3 EcoBoost or the 5.0 Coyote V8 (480 to 500 hp). It's a modern car with a lot of screens and modules, and that shows up in how it treats its battery.
Three different "won't start" problems
| What happens | Most likely cause |
|---|---|
| Dead after sitting a week or two, fine after a jump | Battery drained while parked |
| Battery has power but the car won't start, or it stalls and loses lights, wipers or AC | Possible cracked ground connection (recall 26V547) |
| Intermittent no-crank with communication codes, starts after waiting | Software or module issue. Ask about bulletins |
The wiring ground recall (26V547)
Ford says the engine compartment wiring harness ground connections on certain 2024-2026 Mustangs may fracture. When that happens, you can lose drive power, headlights, the windshield washer, air conditioning or the engine cooling fan. Interim owner letters went out September 5, 2026, and the fix (new ground terminals) is expected in March 2027.
Owners are already reporting it. One NHTSA complaint says a 2024 Mustang wouldn't start "even though the battery had power" and had a burning wire smell. Another describes a stall at 75 mph that came back after a restart. Several say the recall part isn't available yet.
Why batteries die while parked
Owners on the Mustang7G forum report a few patterns with new S650s:
- Low charge on delivery. Some cars sat for weeks or months before delivery. Owners recommend topping off with a charger right away.
- Leaving it unlocked. A locked car goes into a deeper sleep. Unlocked, more systems stay on standby.
- Long storage. One owner who stores the car in winter says it needed a jump after months in the cold.
- Connected services. One owner says turning off connectivity stopped repeated drains, but that also kills the app, recalls and updates.
A forum member also pointed to Ford TSB 52142 (December 2023) for an intermittent no-crank or no-start with loss-of-communication codes, fixed by updating the ABS module software. We couldn't open the bulletin ourselves, so ask your dealer whether it applies to your VIN.
Easy things to try first
- Charge it fully with a smart charger, then see if it holds overnight
- Lock the car when parked, even in your garage
- Use a battery maintainer for storage or cars driven only on weekends
- Check for over-the-air updates in the settings menu
What it costs
| Job | Typical cost |
|---|---|
| Battery replacement, 2024-2025 Mustang | $303 to $337 (RepairPal) |
| Dealer battery replacement, 2024 Mustang | $259 to $305 (KBB, parts $208 to $244, labor $51 to $61) |
| Dealer battery replacement, 2025 Mustang | $374 to $426 (KBB) |
| Ground terminal recall 26V547 | $0 at a Ford dealer once parts arrive |
On a car this new, a failed original battery may still be covered by Ford's warranty, so ask the dealer and get a printed battery test before paying.
What to ask the dealer
- "Is recall 26V547 open on my VIN, and what should I do until the part arrives?"
- "Does TSB 52142 or any other bulletin apply to my car?"
- "Can you test the battery and check for a parasitic drain?"
- "Is the battery covered under my warranty?"
Is it worth fixing?
Absolutely, and most of it should be free on a car this new. Get on the recall list now, keep a smart charger handy, and don't pay for a battery until someone proves the battery is the problem.
More Mustang help is on the Ford Mustang repair page. Brakes due? See our Mustang brake cost guide. Prices checked October 14, 2026.
