Electric vehicle battery failures are among the biggest concerns for prospective EV owners, particularly when replacement costs can be substantial.
For one Tesla Model Y owner, YouTuber Andy Slye, that concern became a reality when his 2022 Model Y began displaying the dreaded “Unable to Charge” error message after approximately 47,000 miles.
The vehicle, primarily driven by his wife, would no longer charge at home. Even an attempt to use a Tesla Supercharger proved unsuccessful, with charging stopping after just a few minutes and additional error messages appearing, including a warning that the maximum charge level had been reached.
Suspecting a faulty battery cell, the owner decided it was time to take the vehicle to Tesla for inspection.
Assessing Battery Health Before Replacement
Before taking his Model Y in for repairs, Andy examined its existing battery health using Recurrent, an app that provides battery performance and degradation estimates.
The results showed that the original battery retained approximately 84% of its original capacity, representing 16% degradation after 47,000 miles. Its estimated real-world range was around 251 miles, while its range score stood at 93 out of 100.
Interestingly, the owner had maintained particularly good charging habits, with the vehicle spending approximately 98% of its charging time within the recommended battery range. Home charging was also used for the vast majority of its charging sessions, with relatively few Supercharger visits.
Despite these precautions, the battery had developed an internal fault. Tesla’s eventual diagnosis identified a weak battery section, described in the service report as an internal weak brick short within the high-voltage battery.
The experience highlighted that even owners who follow recommended charging practices can encounter battery problems. Sometimes, an individual faulty cell or battery section is enough to affect the entire system.
Tesla Replaces the Battery Under Warranty
Getting the Model Y into Tesla service initially appeared to be another headache. The earliest appointment available through the app was approximately two weeks away, with the nearest available location around two hours from home.
However, after speaking with other Tesla owners, he discovered that an inability to charge could be treated as an urgent service issue. Rather than waiting for the scheduled appointment, he took the car directly to his local Tesla service center in Louisville, Kentucky.
The response was surprisingly positive. Tesla accommodated the vehicle, provided a loaner, and completed the battery replacement within a few hours on the same day. A very smooth experience.
According to the service summary, technicians confirmed the high-voltage system alerts, identified the internal battery fault, and replaced the high-voltage battery. They also addressed the associated coolant requirements, inspected the battery’s operating data, and completed a post-repair validation test drive.
The total cost to the owner was $0, as the repair was covered entirely by the original battery warranty.
Tesla confirmed that the replacement battery was remanufactured rather than brand-new, which made the results particularly interesting.
Replacement Battery Delivers a Surprising Range Increase
Before the replacement, Andy estimated that the Model Y could achieve approximately 278 miles of range on a full charge. However, the replacement battery produced a considerably more impressive result.
With the vehicle showing 78% state of charge and 256 miles of estimated range, the owner calculated a projected full-charge range of approximately 328 miles.
That represented an increase of roughly 50 miles compared with the previous estimate, bringing the vehicle’s estimated range close to its original new-car performance.
What initially appeared to be a costly financial setback and inconvenient battery failure ultimately turned into a positive and stress-free ownership experience. The repair was completed in a single day, the owner received a loaner vehicle, and the replacement battery offered considerably more estimated range.
While battery failures remain a legitimate concern for electric vehicle owners, the experience demonstrated the value of Tesla’s battery warranty and the potential benefits of having a faulty battery replaced before coverage expires.