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This article is about how Consumer Reports ranked Tesla very low in reliability, 27th out of 28 brands.
Here is the actual Consumer Reports article:
Who Makes the Most Reliable New Cars?
Every Tesla owner I know has always praised how trouble free their cars have been. Maybe my friends have just been lucky? Or is this another example of advertiser bias?
Consumer Reports and JD Power both emphasize components of 'quality' and 'reliability' that tend to reward the simplest vehicles. That is not entirely disingenuous because the more complex the vehicle the more things can go wrong. Further, the highest volume vehicles in their surveys are the most accurately measured so statistical reliability and validity both are more robust.
In both these vendors the 'least reliable' vehicles tend to be lower volume and more complex. The questions do vary. Not long ago software updates were considered to be 'things gone wrong' or 'defects'. They have both improved somewhat but still penalize higher specification vehicles.
The greatest oddity is the contrast between 'owner satisfaction' and 'things gone wrong'. Almost always their own surveys of 'owner satisfaction' or 'repeat purchase intentions' are inversely correlated with their own reliability surveys.
Thus Consumer Reports itself reports Tesla has with the highest owner satisfaction and almost worst reliability. Why is that? Simply because the methodology differs in the two topics. They claim to weight vehicle immobilization much more heavily than they do minor cosmetic flaws. However neither is inclined to share details.
In past years I have dealt with reports fo both, although the revenue model for JD Power gives much more detail to corporate customers than does Consumer Reports. Neither actually lies, in my experience. Both have notable biases that vary from situation to situation.
We could go into great detail about these surveys, but that would be a waste of time. Why? Consumer Reports is devoted to the very risk averse people who constitute their core customer (member) base, so even microwave ovens , washing machines and OTC vitamins are subjected to equal scrutiny. JD Power is totally dependent on Corporate clients which pay their bills, so their results invariably are skewed to favor those which pay the most. Tesla and few others are often treated with a jaundiced eye. In my opinion that is generally unconscious, but certainly not always.
Either way, we will report on their pronouncements and agonize or be thrilled, depending. Either way they will rarely make any difference at all to typical Tesla buyers and users.