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Tesla battles new brake failure claim in China, owner admits story is fabricated

Credit: Tesla

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Tesla’s battle with the FUD (fear, uncertainty, doubt) campaign in China continues after a Model X owner claims the brakes on his all-electric SUV are faulty. The man was caught admitting that the story is fabricated, telling local media that “I know my car has nothing wrong with it.”

Over the past several months, Tesla has been sparring with owners in China who appear to be a part of an effort to derail the company’s momentum in the country. It all started a couple of months ago at the Shanghai Auto Show when a woman invaded Tesla’s booth at the event by jumping on top of a Model 3 and claiming that her brakes had failed during a drive with her father. The drive ended in an accident, and she blames it on Tesla’s “faulty brakes.”

She was sentenced to serve a few days in jail and has made every attempt to make her case as public as possible. She has gone as far as spraypainting the car as it sat outside of a Tesla showroom in China and has also denied any attempt that Tesla has made to resolve the issue. The automaker published a lengthy statement in May, indicating that it had offered to pay for a third-party company to assess the potential of a brake issue while paying for the study. She denied this and also said that data released by the automaker, which proved that the owner’s father, who was driving the vehicle at the time, traveled at excessive speeds during the journey and also had utilized the brakes successfully many times in the moments leading up to the accident, could have been fabricated or tampered with by Tesla.

The Tesla Model Y is leading China’s electric SUV segment by a wide margin

This hasn’t been the only instance, and those who have decided to turn against the automaker have made it abundantly clear that there will be more attempts in the future to claim that Tesla’s vehicles are faulty and dangerous.

Model X Owner claims faulty brakes, Tesla responds

Now, a Model X owner in China named Mr. Wen is claiming that his vehicle has faulty brakes and is demanding that Tesla provide him with a newly refreshed Model X.

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According to a statement on Tesla’s Weibo page, Wen suffered an accident in his vehicle, and Tesla reached out to him to figure out the issue. “At present, the initial remote diagnosis of the cause of the vehicle alarm is the right front wheel speed sensor, and the vehicle used by Mr. Wen at the time of failure…may be due to contamination of the wheel speed sensor or damage to the sensor line,” Tesla said (via @Ray4Tesla). “Mr. Wen’s vehicle has traveled more than 175,000 kilometers, which has exceeded the vehicle warranty.”

Tesla then suggested that the vehicle be towed to a Service Center in China so that it could be examined to determine the reason for failure and fixed properly. However, Wen has continued to drive the car over 800 kilometers, Tesla says, and has gone as far as claiming on the internet “that the vehicle has failed and it was dangerous.”

Tesla says it hopes that Mr. Wen will allow the company to conduct inspections and repair the car so it can be used normally as soon as possible.

Mr. Wen admits to media that “I know my car has nothing wrong with it”

According to Tesla, the blog Teslabot broke a recording of Mr. Wen admitting that the car has no issues. In a series of statements, he said, “I know my car has nothing wrong with it,” and “The coil is aging, or it is worn during the car wash. This is suspected to be the problem, my car will not have any major problems.”

Wen said that he didn’t have money to find media exposure and that “If you don’t make trouble, you can defend your rights normally, our police station will not participate.”

According to the post on Weibo, the media outlet Henan Guan Lei TV has deleted all of the reports of Tesla vehicle issues in China.

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Unfortunately, this is not the first time that those who have claimed that Tesla’s vehicles have issues have admitted that their story was fabricated. It’s actually happened on several occasions, with many of the perpetrators admitting that their issues were made up for media attention.

Tesla has also battled falsified and non-verified reports of lackluster sales figures. Most recently, a claim that indicated Tesla’s registrations in China in May had reduced by 50% was shrugged off by the Secretary General of the Chinese Passenger Car Association.

What do you think? Let us know in the comments below, or be sure to email me at joey@teslarati.com or on Twitter @KlenderJoey.

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 has a Cybercab problem nobody saw coming

Tesla’s Cybercab line now builds robotaxis faster than Tesla can deploy them, Lars Moravy says.

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Tesla’s Cybercab line in Texas can now build the two seat robotaxi faster than the company can put it into service, according to Lars Moravy, Tesla’s Vice President of Vehicle Engineering. “We don’t run every day because the line can run so fast. It’s currently outpacing our deployments,” Moravy said in a new Cybercab deep dive from Munro Live. “So, it’s a bit of a race right now. Who’s going to go faster? Right now the manufacturing line’s ahead.”

Tesla’s official Robotaxi account shared a Cybercab analysis video on X on Monday, calling it a “Cybercab engineering deep dive.” Moravy’s comments go further than what he told analysts on the Q3 earnings call last week, when he said the Cybercab line’s listed capacity of more than 125,000 units a year undersells what it can actually run.

The tour shows where that speed comes from. Tesla’s unboxed process splits the Cybercab into front, rear, side and center modules that are built and tested on their own before they meet on a short final line. That final line has just 25 fully automated stations, which Tesla’s team estimated is a fifth to a tenth of what a Model Y needs. The full line is about 78% automated, the framing line is already at 100%, and the layout uses roughly 50% less floor space per vehicle. The stated goal is “100% automation in 10 second cycle time,” or one finished Cybercab every 10 seconds.

Tesla also deleted the paint shop. Only the side modules are coated, and the exterior panels get their color inside the molding machine. Engineers said the car is designed to run at least 500,000 miles, which matters for a vehicle that will spend most of its day carrying riders.

The battery got the same treatment. The Cybercab uses an 88S6P pack of 4680 cells in a steel enclosure, a first for Tesla, with each module potted separately so a single failed module can be swapped instead of the whole pack. Wireless battery management boards replace a wiring harness, and new contactors are fast enough to drop the pyro fuse entirely. Tesla’s battery director graded the pack an A minus, compared with a D for the Model Y structural pack and a B minus for Cybertruck. Up front, the drive unit runs an 11:1 gear ratio versus roughly 9:1 on most Teslas, since the Cybercab does not need a high top speed.

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The deployment side is now the bottleneck Moravy described. Tesla had more than 50 Cybercabs working the Formula 1 weekend in Austin, and Texas records show 463 Cybercabs registered. Tesla said on its earnings call that Cybercab service will launch in Dallas next month, and Moravy said the company is aiming to get Cybercabs to customers by the end of 2026. Every unit built so far has gone into Tesla’s own fleet since the line moved into volume production in April.

Munro Live also asked when it could get a Cybercab to tear down. Tesla’s answer: “Not yet.”

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How SpaceX Is raising Raptor’s sea-level thrust while holding engine mass steady

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Credit: SpaceX

SpaceX’s Raptor engine family has steadily increased sea-level thrust while simultaneously reducing mass, turning iterative engineering gains into substantially higher performance for the Super Heavy booster. CEO Elon Musk shed more light on how powerful Raptor 4 will be, and it’s pretty crazy.

Raptor 1 delivered 185 metric tons of thrust at roughly 2,080 kilograms, while Raptor 2 raised that to 230 tons while cutting mass to about 1,630 kilograms. SpaceX data for Raptor 3 lists a target of 280 tons at 1,525 kilograms (with further reductions in associated vehicle hardware), while operational flight ratings have been cited near 250 tons.

This morning, Elon Musk stated that Raptor 4 is expected to reach 300 tons of sea-level thrust at roughly the same mass as Raptor 3. Across these versions, thrust has risen by more than 60 percent from the first engines while engine mass has fallen, producing a sharp improvement in thrust-to-weight ratio. This is a true testament to how great SpaceX engineering has been:

With 33 engines on SuperHeavy, the jump from earlier versions to a 300-ton Raptor 4 would produce roughly 9,900 metric tons of total liftoff thrust, nearly three times the Saturn V’s approximately 3,400 metric tons from its five F-1 engines.

This is not just a larger number on a data sheet, either, as sea-level thrust is the force available the moment the vehicle leaves the pad. This is when it is heaviest and still deep in Earth’s gravity well and dense atmosphere.

Higher levels of sea-level thrust directly improves the initial thrust-to-weight ratio of the full stack. A higher ratio produces faster acceleration off the pad, which shortens the time the rocket has to spend fighting gravity, and gravity losses during the first minute or two of the flight are a major drain on total available delta-v. Every second shaved off of that early climb preserves more propellant energy for reaching orbital velocity or for carrying extra payload.

Because Super Heavy’s engine count is constrained by vehicle diameter and packing density, increasing thrust per engine is the most straightforward way to raise total liftoff performance without redesigning the booster structure or design.

The same-mass target for Raptor 4 is equally important. Holding engine mass roughly constant while raising thrust improves the engine’s own thrust-to-weight ratio and reduces the structural and propellant mass fraction that must be carried solely to support the engines.

Earlier Raptor iterations also simplified or eliminated extensive vehicle-side hardware such as heat shields. These gains compound: more force for less installed mass leaves additional capacity for propellant, payload, or operational margins such as engine-out capability.

For Starship’s architecture, the practical effects are large. Greater liftoff thrust supports heavier vehicles, larger propellant loads, and higher payloads to low Earth orbit, figures SpaceX has targeted in the 100-plus-ton reusable range. That capacity underpins orbital refueling, lunar missions, and eventual Mars cargo and crew flights.

Continued growth in sea-level thrust therefore tightens the gap between theoretical rocket performance and the high flight rates and reusability needed to make large-scale space transport practical.

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Tesla Assisted Driving expands to tenth EU country

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Tesla has expanded its Tesla Assisted Driving (TAD) suite to its tenth European country, as Latvia joined a growing list of European Union member states authorizing the company’s advanced driver assistance technology.

Tesla Europe announced this morning that the system is now approved in Latvia, with a software rollout to begin soon.

The approval and rollout follow recognition of a provisional European type approval originally granted by the Netherlands’ RDW authority on April 10.

Latvia’s Road Traffic Safety Directorate (CSDD) evaluated the Dutch documentation, coordinated with the other national authorities, and reviewed updates from Tesla. These included tightened limits on speed offsets, automatic resets of any manual speed adjustments after each trip, and stronger driver monitoring.

In Europe, the feature is marketed as Tesla Assisted Driving after a recent rule change that labeled the name “Full Self-Driving” as misleading.

Tesla starts showing how FSD will change lives in Europe

The system remains an SAE Level 2 driver assistance tool, not unsupervised autonomy. It can control speed, steering, braking, lane changes, and intersections while following a navigation route. Drivers need not keep their hands on the wheel at all times, yet they must continuously monitor the road and be prepared to intervene immediately.

The sequence of EU recognitions began with the Netherlands in April and continued through Lithuania, Estonia, Denmark, Belgium, Slovenia, Czechia, Croatia, and Slovakia. Most have relied on mutual recognition of the single Dutch provisional approval rather than independent national testing.

These national clearances do not yet constitute bloc-wide authorization. An EU-wide decision requires a qualified majority in the Technical Committee on Motor Vehicles: at least 15 of 27 member states representing 65 percent of the EU population. Larger markets, like Germany, France, and Italy, remain under review, and a vote is expected this December.

However, for Latvian Tesla owners with compatible vehicles and software, the imminent rollout expands access to the supervised system while underscoring that attentive human oversight remains essential.

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