0

Olds Alero '03 has a broken left front window regulator. The window motor's OK.

This would make it the third time this part failed; different shops did both repairs, and I'm wondering if poor quality replacement parts may not have played a role, i.e. an OEM using a plastic that oxidizes and becomes brittle.

Online vendors offer several brands of regulators, (Delco, Dorman, Cardone, ReplaceXL, etc.), at varying prices. I don't know which, if any, is better, or which if any has better odds on being better.

Non subjective questions:

  1. Without considering price, are there any objective parts build quality reputation brand rankings out there?
  2. What exists in the way of:
    • publicly available analytical data on brand quality, (i.e. strength of materials, MTBFs, etc.), arrived at by reproducible testing with rigorous controls,
    • or statistical sales data on rate of returns by brand,
    • or customer polling of satisfaction by brand.
  • Welcome to the site. You do realize the premise of this question is opinion-based, right? – Zaid Oct 24 '17 at 18:18
  • 1
    You have answered your own question "I know which, if any, is better." – Solar Mike Oct 24 '17 at 18:22
  • Just wondering if the parts broke because of low quality or if there is something else causing premature failure; like improper installation, binding window track, twisted door, moisture in the door, etc. – CharlieRB Oct 24 '17 at 19:19
  • @SolarMike, Sorry that's a typo made while editing. Should have been "I don't know...". The Q. is now corrected. – agc Oct 24 '17 at 20:38
  • @CharlieRB, That's possible, but for the sake of this Q. please ignore those factors. (Some of those factors might make interesting separate Qs.) – agc Oct 24 '17 at 20:54
1

Even if such a ranking does exist it would be of little practical use


Consider the following:

  • variations during manufacturing

    Due to things like different suppliers for the same part, different operators, different norms adopted in different factories/assembly locations...

  • variations during operation

    Due to variations in temperature and humidity, the frequency of usage, the torque supplied by the motor, the loading conditions it is subjected to...

  • variations in testing procedure

    Just because a part is tested and certified under certain conditions, it is not a guarantee for how it will perform in the real world. The discrepancy between quoted MPG ratings and real-world MPG figures are a classic example of this.

The crux of this answer can be summed up as follows: your mileage may vary.

  • Manufacturing seems like the most interesting variable, since failures of operation and testing are all more likely given poor build quality. If Brand X consistently cuts more corners more than Brand Y, (even if on a given month Brand Y makes a worse dud than Brand X), the odds are in favor of Brand Y being the safer buy of the two. – agc Oct 24 '17 at 20:51

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.