alt Hacker NewsYes but specifically, in this article, the passage is written about a harness connector on a door window switch module as follows:
>Fourteen pins in two parallel rows carry every signal this panel produces to the rest of the vehicle. Automotive connectors are among the most common failure points in modern cars: corrosion, fretting, and thermal cycling work on these joints over years of use. One connector failure on a module this integrated takes out mirrors, windows, locks, and child safety all at once.
Corrosion on an interior module connector is not as much of a concern these days unless the car is in a flood or the door card sealing is broken due to something like a poor repair job.
Fretting? What would cause fretting on pins of a connector that never gets touched by a human after it leaves the factory. It is a static connection, it doesn't get plugged and unplugged.
Thermal cycling? It is inside a door panel... not near a hot exhaust or inside an engine. It sees normal interior temperature cycles.
An actual Closures Engineer would more likely call out vibration shock during door slam in a closures FMEA as a potential electrical window switch fault hazard resulting from the connector loosening if the chosen connector lacks sufficient mechanical fastening moreso than anything..
Saying that connectors themselves are "among the most common failure points in modern cars".... just sets of flags to me as overly flatulent, generated puff writing. "Oh I need to list three things about connectors (thinking).... Corrosion -Fretting- Thermal Cycling-!! and this makes connectors among the most common failures in modern cars (no sources cited)".
(I'm a former automotive engineer.)
In addition I'll give one more criticism:
Above that reads this bit:
Integrated door switch modules have been more common than not on cars for easily the last 15 years now, and I don't think this in any way exemplifies BYD's "Vertical Integration" or "favoring fewer subassemblies" (these two things actually don't even necessarily imply each other!!). There are plenty of cars that use such assemblies and the companies outsource to tier 2's for the actual manufacturing - Mercedes and Valeo, for example. Because they don't actually take apart the module and look for, say, a logo on the silkscreen of the PCB, I don't think the author actually confirmed if BYD 'designs' (let alone manufactures) the complete switch unit in-house. They could. I'm not saying they can't. But...But this whole article is written from a weird authoritative viewpoint when really I think it should back down a bit and just describe what the damn CT scans show.