What a Mach-E Battery Keeps After 100,000 Miles, Next to Tesla and Hyundai

Ford's battery health report on the 2021 Mustang Mach-E, as Motor1 summarises it, starts from a design target: 90% health at 100,000 miles. The report covers a cohort of about 36,000 first-year cars. They averaged 92%, with 95% of them between 87% and 97%. Ford's report was not available at the time of writing. The figures here are as Motor1 reports them, and Motor1 does not say how Ford measured battery health.

The high-mileage groups

Motor1 reports that more than 2,000 Mach-Es have passed 100,000 miles and average better than 91% battery health. That is above Ford's 90% target. Past 200,000 miles, more than 30 of the 2021 cars average 88%.

The three groups are very different in size. The cohort average rests on about 36,000 cars, the 100,000-mile figure on more than 2,000 and the 200,000-mile figure on more than 30. A group as small as the last one can be moved by a few unusual cars.

Independent medians from Aviloo

Independent figures come from the battery tester Aviloo. Its study covers more than 500,000 tests on 20 EV models, up to 150,000 km, and was reported by Electrek with medians at 50,000 km and 150,000 km. InsideEVs, covering the same study, adds medians at 100,000 km for the Ford and the two Hyundais. It reports the Teslas only at 150,000 km.

At both of Electrek's distances the order is the same: the two Hyundais first, the Mach-E third, the two Teslas behind it. At 150,000 km the medians run from 88.9% for the Model 3 to 93.8% for the Ioniq 5. The two reports round slightly differently. InsideEVs gives the Model 3 at 88.94%, and the table uses Electrek's 88.9%.

Ford's own figure is not in the table. Ford reports better than 91% at 100,000 miles, and Aviloo's median for the Mach-E is 92.5% at 150,000 km. A distance of 100,000 miles is longer than 150,000 km, so Ford's high-mileage group has covered more ground than the cars in Aviloo's last column. The two are also different measurements. Ford's is the carmaker's average for its own cars. Aviloo's is an independent median.

Ford's figure next to Tesla's

Tesla's 2023 Impact Report, as InsideEVs reported it, says Model 3 and Model Y Long Range cars lose 15% on average after 200,000 miles. Ford's group past 200,000 miles averages 88%. Each is the company's own figure for its own cars, and neither InsideEVs nor Motor1 describes the method behind it.

Tesla's figure covers Long Range versions only and, as InsideEVs reports it, gives no 100,000-mile number to set beside Ford's. Neither figure is independent, and the Ford one rests on more than 30 cars. The comparison does not settle much.

Rated range when new

The EPA listing on fueleconomy.gov was not available at the time of writing. These 2021 ranges and pack sizes are as InsideEVs reported them.

The EPA rating is for a new car. Motor1 does not say how Ford measured health, and none of the sources here state how a given health percentage turns into miles on the road for a Mach-E. The ratings are a starting point. They are not a measured range for a high-mileage car.

What the 8-year/100,000-mile warranty covers

Recharged, a used-EV seller, describes the Mach-E's high-voltage battery warranty as 8 years or 100,000 miles, whichever comes first. By its description, the warranty covers capacity that falls below 70% of the original. Ford's warranty booklet was not available at the time of writing, so the 70% line is unconfirmed.

Ford's reported averages sit well above the 70% line Recharged describes. The cars past 100,000 miles average better than 91%, and the bottom of the range that covers 95% of the first-year cohort is 87%.

Recharged's description does not say how capacity is measured for a claim, or what Ford repairs or replaces when a car falls below the line. Terms like those are normally set out in the warranty booklet itself.

The "whichever comes first" wording matters most on used cars. By Recharged's description, a Mach-E past 100,000 miles is out of battery cover however young it is. A car under that mileage is out of cover after eight years. The start date counts as much as the odometer.

Fast charging and the yearly rate

Geotab's study, published on January 13, 2026, covers more than 22,700 EVs from 21 makes and models. It puts the average loss at 2.3% a year, up from 1.8% in its 2024 figures. Cars charged mostly on AC or at lower power averaged around 1.5% a year. Cars using DC fast charging above 100 kW averaged up to 3.0%.

The models in Geotab's sample are anonymised. The study gives no Ford, Tesla or Hyundai figures, so it says nothing about the Mach-E specifically, and it does not tie the rise from 1.8% to 2.3% to any one make. Geotab's figures are also yearly rates, while Ford's are averages at a given mileage, so the two do not line up directly.

Resale

iSeeCars lists roughly 39% retained value for the Mach-E. That is in line with the roughly 61% depreciation it gives for electric compact SUVs. The time period behind those figures is not stated. Recharged gives three-year and five-year figures that conflict with each other, so there are no reliable three-year and five-year resale figures to put in a table.

By Ford's own numbers, the first-year Mach-E has met the battery target Ford set for it, and Aviloo's independent medians place it behind the Hyundais and ahead of the Teslas. The resale data is too thin to judge.

If you own one

• Find the warranty booklet and read the capacity clause. Check whether it says 70%, and how capacity is measured for a claim.
• Find the date the warranty started and keep a note of it with the booklet in the glovebox.
• Note how many miles are left before 100,000 and how long until the eight years are up. Whichever comes first ends the battery cover.
• Read the EPA figure for your version as the rating when new, not as what the car does today.