Tesla's Six-Seat Family SUV Sags Under Its Own Job Description

Let's talk about what happens when a car built for six people meets a full load and gives up. About a year after its debut in China, Tesla's Model Y L, the six-seat flagship SUV assembled in Shanghai, is facing a wave of owner complaints reporting that the rear suspension "collapses", narrowing the gap between the tire and the wheel arch until, in the worst cases, not even a single finger fits between them.^[1]

A spring is not a complicated device. It is a coil of steel with exactly one job: hold the car up. When you stretch a Model Y into an L, add a third row, and market it to families who will actually fill all six seats and the cargo bay, you are asking that coil of steel to carry materially more weight. The owner testimonials now piling up on Xiaohongshu and Weibo suggest somebody did that math wrong.

CarNewsChina's reporting, drawn from owner testimonials on Sina, paints a consistent picture.^[1] A Hebei owner reported severe sag after 9,000 kilometers on a fully loaded trip to Tibet. A Shanghai owner with nearly 30,000 kilometers since October 2025 watched the rear gap shrink to two fingers, felt the chassis sway increase, and started scraping the underbody. Electrek found at least ten posts with the same complaint and hundreds of comments agreeing.^[2] The pattern is not "one bad week at the factory." It is a sag that develops with mileage and load.

And then it gets worse. Tesla replaces the springs free under warranty, but the sag alters wheel alignment and chews through the inside edges of the tires, sometimes down to the safety limit, and the tires are the owner's bill. One driver reported the suspension collapsed again just ten days after a spring replacement, with violent swaying on the road, and claimed the service center refused a second swap because it had no final solution.^[1] Read that again: the fix failed in ten days, and the people whose job is to fix cars told a customer there is nothing left to fix. A recurring failure after replacement is not a bad batch. It is a design load rating that the vehicle keeps exceeding.

My favorite detail is the finger test. Owners invented their own metrology: four fingers between arch and tire means normal, three means warning, two and a half or fewer means failure.^[2] Tesla's official threshold, according to owners who asked, is 784 millimeters plus or minus 20 as normal, with replacement authorized only below 764. Normal people do not carry tape measures. So they invented a body-based ruler for a warranty decision, which is what happens when a company stays silent and its customers start doing quality control themselves. Tesla China has issued no public statement; customer service tells owners to book service-center appointments.^[1]

Consider the same week. On August 31, Tesla filed a federal recall for exactly 19 Model Ys over front suspension lateral link bolts, traced to a deactivated PLC torque controller in under three weeks, with the 573 report naming the bolt, the supplier, and the torque spec.^[5] Precision. In China, a viral rear-suspension saga spanning a year of production gets shrugs and per-car appointments. One axle gets a root cause; the other gets a booking link. I am not claiming the two defects are related, they are different components on different continents. I am saying the asymmetry of effort is instructive about which problems a company chooses to understand.

To be fair, and fairness matters even when the engineering makes me furious: no crashes or injuries have been reported, and Tesla is honoring warranty spring replacements, which is the system working as designed. The complaints cluster in early batches, delivered September and October 2025, and owners say most of those cars are fixed. A loaded vehicle squats; some photographs may capture normal load behavior rather than failure. Xiaohongshu is not a sample, and the finger test is not an ISO standard. There is no regulator involved, no FARS data exists for a car launched in 2025, and the standard Model Y's record, the lowest fatality rate in our dataset at 0.03 per 100 million miles, says precisely nothing about this redesigned six-seat rear end.^[6]

If you own a Model Y L, do the finger test monthly and photograph it, or measure arch height with a tape, since normal runs 764 to 804 millimeters and anything under 764 is Tesla's own replacement line. Check your inner tire edges after long loaded trips, because the defect that eats your tires leaves the bill with you. Early-batch owners in particular should keep logs. Shanghai-built cars are also sold in Australia and New Zealand, so this is not a China-only homework assignment. And for everyone else shopping three-row EVs: a suspension's job is to carry the passengers the marketing promised. Ask what the load rating is before you sign.