2021 Ford Bronco Sport · symptom sheet
Car won't start
- 26owner reports
- 40,000median miles
- $450median quote
- 0involved a crash
Newest report Apr 7, 2026 · checked Oct 2, 2026
26 of the 107 reports of dead battery on the 2021 Bronco Sport describe won't start.
Part of Battery dies or the car will not start (107 reports)
Tick what matches of 26 reports
Won't start on other Bronco Sport years
No other Bronco Sport model year has enough reports of won't start for a sheet of its own. See every Bronco Sport year.
What got replaced
Owners who name the part that was replaced mention the battery (23 reports) and the module (3 reports).
Recalls and investigations
3 recalls on the electrical system cover the 2021 model year. A recall on the same system isn't always the same failure, so read the defect text.
The engine block heater may crack and develop a coolant leak, causing it to short circuit when the block heater is plugged in.
The 12-volt battery may experience degradation and suddenly fail.
The body and power train control modules may fail to detect a change in the 12-volt battery state of charge.
All 16 recalls on the 2021 Ford Bronco Sport, with the owner complaints on each recalled system
NHTSA investigations into the electrical system on the Bronco Sport
Loss of motive power. Closed oct 10, 2025, led to recall 25V-019.
Loss of motive power. Closed aug 19, 2024, led to recall 24V-267.
What owners paid
9 of the 26 reports quote a price. Each dot is one quote. The middle half runs $249 to $510.
When it happens
The middle half of failures fell between 28,296 and 50,000 miles, from the 11 reports that gave a mileage.
What owners wrote
“The dash cluster was dead and the start button LED just flashed on and off. The battery, checked with a VOM, showed normal voltage. The vehicle would not start. I unhooked one of the battery terminals and waited 10 minutes for the system to reset. After reconnecting the battery the vehicle lit up, behaved and started as normal. One should not have to carry tools to reboot their vehicle.”
Filed Aug 6, 2021
Should you keep driving it?
This page can't tell you that. 0 of 26 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Engine stalls or loses power while driving 127 reports
- Brakes grind, pulse or wear early 126 reports
- Infotainment, screen or backup camera fails 66 reports
- Transmission shudders, slips or shifts hard 40 reports
- Multiple warning lights come on at once 37 reports
- Check engine light or misfire 35 reports
- Driveshaft, axle or transfer case problems 35 reports
- Engine overheats or leaks coolant 26 reports
- Transmission fails or needs replacement 25 reports