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Tesla Model S missed its 400-mile EPA rating over mishap during testing, reveals Musk

(Photo: Tesla Photographer/Instagram)

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Among many topics covered during Tesla’s Q1 earnings call, CEO Elon Musk revealed that a fumble by the Environmental Protection Agency (EPA) might have cost the Tesla Model S its 400-mile range rating.

After Tesla released the “Long Range Plus” variant of the Model S earlier this year, the company’s flagship vehicle came within striking distance of the elusive 400-mile electric range threshold. Testing from the EPA revealed that the new longer-range Model S was capable of 391 miles in a single charge, making it the company’s longest-range vehicle.

However, Musk stated during the company’s Q1 2020 Earnings Call that when the EPA came to test the Model S, the government agency made one small mistake that inevitably ended up costing Tesla’s flagship sedan nine miles of range.

“It should be said that the real Model S range is 400 miles,” Musk claimed during the call on April 29. “But when we did the last EPA test, unfortunately, the EPA left the car door open and the keys in the car.” This meant that the Model S effectively “ran” overnight, and depleted 2%, or around nine miles of range, from its battery in the span of the evening.

However, Musk is confident that when the EPA inquires about testing for Tesla’s vehicles in the future, the car will achieve a range of 400 miles or higher. The new round of testing will not take place until after the current social distancing restrictions end in the San Francisco Bay Area, where Tesla’s Fremont production facility is located.

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Musk reiterated at the tail end of his statement that the “true” range of the Model S for the past two months had been 400 miles. Even though the EPA estimated the range at 391, drivers who own the Long Range Plus configuration will experience 400 miles of range per charge. The EPA guidelines simply state that the vehicle is capable of only 391 miles, however.

Tesla has undoubtedly been the electric car maker who has led the industry in battery performance and range. While many other companies struggle with the range of their electric vehicles, Tesla has managed to separate itself from the pack. The company’s development of battery cells and constant work to make its vehicles’ power source superior to competitors has led to the company’s flagships’ unmatched range today.

Tesla is not done developing its batteries either. Recently, Tesla applied for a patent for a new electrode makeup and heating process. Tesla claimed in the patent that its new system for batteries eliminates a large number of impurities from the cells, which become present during the heating process.

Tesla has made strides towards the development of its own battery cells. Not only did the company obtain the help of battery researcher and expert Jeff Dahn of Dalhousie University in Canada, but Tesla also acquired battery companies like Maxwell Technologies and Hibar Systems. With the assistance of these new companies under Tesla’s wing, the electric automaker has obtained knowledge and technologies that have established it as a leader in the EV segment.

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Joey has been a journalist covering electric mobility at TESLARATI since August 2019. In his spare time, Joey is playing golf, watching MMA, or cheering on any of his favorite sports teams, including the Baltimore Ravens and Orioles, Miami Heat, Washington Capitals, and Penn State Nittany Lions. You can get in touch with joey at joey@teslarati.com. He is also on X @KlenderJoey. If you're looking for great Tesla accessories, check out shop.teslarati.com

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Tesla Model 3 named New Zealand’s best passenger car of 2025

Tesla flipped the switch on Full Self-Driving (Supervised) in September, turning every Model 3 and Model Y into New Zealand’s most advanced production car overnight.

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Credit: Tesla Asia/X

The refreshed Tesla Model 3 has won the DRIVEN Car Guide AA Insurance NZ Car of the Year 2025 award in the Passenger Car category, beating all traditional and electric rivals. 

Judges praised the all-electric sedan’s driving dynamics, value-packed EV tech, and the game-changing addition of Full Self-Driving (Supervised) that went live in New Zealand this September.

Why the Model 3 clinched the crown

DRIVEN admitted they were late to the “Highland” party because the updated sedan arrived in New Zealand as a 2024 model, just before the new Model Y stole the headlines. Yet two things forced a re-evaluation this year.

First, experiencing the new Model Y reminded testers how many big upgrades originated in the Model 3, such as the smoother ride, quieter cabin, ventilated seats, rear touchscreen, and stalk-less minimalist interior. Second, and far more importantly, Tesla flipped the switch on Full Self-Driving (Supervised) in September, turning every Model 3 and Model Y into New Zealand’s most advanced production car overnight.

FSD changes everything for Kiwi buyers

The publication called the entry-level rear-wheel-drive version “good to drive and represents a lot of EV technology for the money,” but highlighted that FSD elevates it into another league. “Make no mistake, despite the ‘Supervised’ bit in the name that requires you to remain ready to take control, it’s autonomous and very capable in some surprisingly tricky scenarios,” the review stated.

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At NZ$11,400, FSD is far from cheap, but Tesla also offers FSD (Supervised) on a $159 monthly subscription, making the tech accessible without the full upfront investment. That’s a game-changer, as it allows users to access the company’s most advanced system without forking over a huge amount of money.

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Tesla starts rolling out FSD V14.2.1 to AI4 vehicles including Cybertruck

FSD V14.2.1 was released just about a week after the initial FSD V14.2 update was rolled out.

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Credit: Grok Imagine

It appears that the Tesla AI team burned the midnight oil, allowing them to release FSD V14.2.1 on Thanksgiving. The update has been reported by Tesla owners with AI4 vehicles, as well as Cybertruck owners. 

For the Tesla AI team, at least, it appears that work really does not stop.

FSD V14.2.1

Initial posts about FSD V14.2.1 were shared by Tesla owners on social media platform X. As per the Tesla owners, V14.2.1 appears to be a point update that’s designed to polish the features and capacities that have been available in FSD V14. A look at the release notes for FSD V14.2.1, however, shows that an extra line has been added. 

“Camera visibility can lead to increased attention monitoring sensitivity.”

Whether this could lead to more drivers being alerted to pay attention to the roads more remains to be seen. This would likely become evident as soon as the first batch of videos from Tesla owners who received V14.21 start sharing their first drive impressions of the update. Despite the update being released on Thanksgiving, it would not be surprising if first impressions videos of FSD V14.2.1 are shared today, just the same.

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Rapid FSD releases

What is rather interesting and impressive is the fact that FSD V14.2.1 was released just about a week after the initial FSD V14.2 update was rolled out. This bodes well for Tesla’s FSD users, especially since CEO Elon Musk has stated in the past that the V14.2 series will be for “widespread use.” 

FSD V14 has so far received numerous positive reviews from Tesla owners, with numerous drivers noting that the system now drives better than most human drivers because it is cautious, confident, and considerate at the same time. The only question now, really, is if the V14.2 series does make it to the company’s wide FSD fleet, which is still populated by numerous HW3 vehicles. 

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Waymo rider data hints that Tesla’s Cybercab strategy might be the smartest, after all

These observations all but validate Tesla’s controversial two-seat Cybercab strategy, which has caught a lot of criticism since it was unveiled last year.

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Credit: wudapig/Reddit

Toyota Connected Europe designer Karim Dia Toubajie has highlighted a particular trend that became evident in Waymo’s Q3 2025 occupancy stats. As it turned out, 90% of the trips taken by the driverless taxis carried two or fewer passengers. 

These observations all but validate Tesla’s controversial two-seat Cybercab strategy, which has caught a lot of criticism since it was unveiled last year.

Toyota designer observes a trend

Karim Dia Toubajie, Lead Product Designer (Sustainable Mobility) at Toyota Connected Europe, analyzed Waymo’s latest California Public Utilities Commission filings and posted the results on LinkedIn this week.

“90% of robotaxi trips have 2 or less passengers, so why are we using 5-seater vehicles?” Toubajie asked. He continued: “90% of trips have 2 or less people, 75% of trips have 1 or less people.” He accompanied his comments with a graphic showing Waymo’s occupancy rates, which showed 71% of trips having one passenger, 15% of trips having two passengers, 6% of trips having three passengers, 5% of trips having zero passengers, and only 3% of trips having four passengers.

The data excludes operational trips like depot runs or charging, though Toubajie pointed out that most of the time, Waymo’s massive self-driving taxis are really just transporting 1 or 2 people, at times even no passengers at all. “This means that most of the time, the vehicle being used significantly outweighs the needs of the trip,” the Toyota designer wrote in his post.

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Cybercab suddenly looks perfectly sized

Toubajie gave a nod to Tesla’s approach. “The Tesla Cybercab announced in 2024, is a 2-seater robotaxi with a 50kWh battery but I still believe this is on the larger side of what’s required for most trips,” he wrote.

With Waymo’s own numbers now proving 90% of demand fits two seats or fewer, the wheel-less, lidar-free Cybercab now looks like the smartest play in the room. The Cybercab is designed to be easy to produce, with CEO Elon Musk commenting that its product line would resemble a consumer electronics factory more than an automotive plant. This means that the Cybercab could saturate the roads quickly once it is deployed.

While the Cybercab will likely take the lion’s share of Tesla’s ride-hailing passengers, the Model 3 sedan and Model Y crossover would be perfect for the remaining  9% of riders who require larger vehicles. This should be easy to implement for Tesla, as the Model Y and Model 3 are both mass-market vehicles. 

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