The main example is the panel gaps on Tesla body. They can be offset by a "large" amount compared to other car brands, but it doesn't harm anything and you have to look for it to be noticeable.
So do Tesla's have a bad build quality? Yes, if you define it by tolerances, but no if you define it by "Does it feel low quality". And the debate online is largely with people talking past each other with differing definitions of what build quality actually means.
> They can be offset by a "large" amount compared to other car brands
The funny thing is that whenever I get into a Tesla, the interior just feels kinda cheap and of low-quality/low-effort design. That's not saying anything about their build quality, though.
I’ve had several Teslas and even currently have their supposed disaster of a truck and have not encountered this alleged build quality issue. My car before that, a Honda Civic, spent much more time in the shop purely on account that it needed oil changes and expensive scheduled maintenances once or twice a year.
Your hydraulic brake systems need to be flushed every couple years to prevent corrosion, even if you don’t use them.
Tesla panel gaps and quality are fine. They had some early issues, but the damn things are basically body panels hung off of almost entirely cast chunks of metal. There is not a lot of room for wiggle. If anything, they're so we'll integrated that they're hard to repair after a crash.
Mercedes, BMW, Volvo, Audi, Honda, Toyota, Accura, Lexus....
I had a MINI. That was a build quality disaster. Major engine issues after only three years. I now have a Silverado 1500 LTZ. It has obvious build quality issues. Interior isn’t as good as it used to be. Gearbox has a banging sound. My Teslas seem so much better than either of those or most other cars I interact with really. I sat in my friends Toyota Camry the other day. The interior seemed so much cheaper, the sound quality so much worse, the cabin was so much more loud than my humble Model 3. What about my car has poor build quality that I am oblivious to?