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> I'd say it would make more sense to compare it with a fairly small ICE part, not with the much larger engine. Why would size matter? Without a motor/engine a

> I'd say it would make more sense to compare it with a fairly small ICE part, not with the much larger engine. Why would size matter? Without a motor/engine a car goes nowhere. It makes sense to compare engine to motor in that context. > But even that doesn't make much sense, because what happened is that he got a series of duds until they found the problem and fixed it. 14 duds in a row? > Taking the average lifetime of a dud and a good engine, as you do, isn't going to tell you much about either of the two kinds. You're right. But taking the 14 duds vs the usual 0/1 for a production ICE car going the same distance certainly tells us a lot.

seanmcdirmid 3y ago
Allegedly there was a design flaw for that model, so their could have been a lot of dud parts until the problem design was fixed. Also, TFA: > Some early Tesla Model S EVs were known to have issues with their rear motors. This particular Tesla suffered from this. The rear motor was replaced thirteen times, so if we include the original that it came with, that's fourteen motors over the course of about 1.2 million miles. > Most of the replacement motors were actually refurbished units and the problem there is that Tesla didn't know the real issue so it didn't know how to properly fix the motors. Some of these replacement motors failed very quickly. Some were covered under warranty, while others were not.
Arnt 3y ago
It tells us that Tesla shipped early, perhaps too early in the development process, and that Tesla was willing to do a lot of replacing. The former doesn't surprise me. Many ICE cars have several electric motors, e.g. to lower/raise the windows. Why would you expect the electric motors in an EV to behave like the ICE rather than the electric motors in an ICE in terms of maintenance requirements? "Expect replacement after x hours of operation" etc.

seanmcdirmid 3y ago

Allegedly there was a design flaw for that model, so their could have been a lot of dud parts until the problem design was fixed. Also, TFA: > Some early Tesla Model S EVs were known to have issues with their rear motors. This particular Tesla suffered from this. The rear motor was replaced thirteen times, so if we include the original that it came with, that's fourteen motors over the course of about 1.2 million miles. > Most of the replacement motors were actually refurbished units and the problem there is that Tesla didn't know the real issue so it didn't know how to properly fix the motors. Some of these replacement motors failed very quickly. Some were covered under warranty, while others were not.

Arnt 3y ago

It tells us that Tesla shipped early, perhaps too early in the development process, and that Tesla was willing to do a lot of replacing. The former doesn't surprise me. Many ICE cars have several electric motors, e.g. to lower/raise the windows. Why would you expect the electric motors in an EV to behave like the ICE rather than the electric motors in an ICE in terms of maintenance requirements? "Expect replacement after x hours of operation" etc.