I have a 2007 Ford Taurus with 128,000 miles. I need to replace my ignition coil and wires, but I'm seeing some new coils for around $35 and some for around $120 (Both online and in stores). The discrepancy between wire sets is similar.

How are some manufacturers or retailers able to sell for so much more, while others sell for less? I'm looking for a thorough answer that will help better familiarize me with how the industry works.

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    Welcome to the site. I'm sure that part 1) is on-topic. Part 2) is better left to your judgment; subjective questions are now a good fit for Stack Exchange – Zaid Aug 24 '15 at 16:25
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    In what @Zaid is saying ... they are not a good fit for Stack Exchange ... at least this Stack Exchange. Sorry for any confusion. – Pᴀᴜʟsᴛᴇʀ2 Aug 24 '15 at 16:53
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    @Paulster2 : Yes, a case of keystroke misidentity – Zaid Aug 24 '15 at 17:04
  • Edited question per the above comments – Jacob Jones Aug 24 '15 at 17:29
  • The old saying "You get what you pay for" has some merit in situations like this. – CharlieRB Sep 25 '15 at 18:25

For Ford, Motorcaft replacement parts are recommended. Don't get them from the dealer, most aftermarket stores sell them.

The difference in price dictates how long they will last. Your original parts lasted 120k the $35 will last 20k, just long enough to get out of the 1 year warranty.

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    Do you have any references which shows the aftermarket parts will not last as long as OEM? I've bought plenty of cheap aftermarket parts which have outlasted OEM. Price does not always dictate quality or longevity. – Pᴀᴜʟsᴛᴇʀ2 Aug 25 '15 at 17:29
  • I've been a mechanic for 8 years now, i'm speaking from using these parts on a regular basis. I agree that OEM does not grantee quality but in this specific case my experience with Motorcraft has been positive. I also stay away from bottom of the barrel prices as well. – vini_i Aug 25 '15 at 17:36
  • My experience confirms @vini_i: during my "starving student" years, I bought a set of new ignition wires for about 1/4 the price of an OEM set. They worked fine for about a week and half, until the temperature dropped, and my car wouldn't start. I got a jump start from a friend, and we noticed that the new wires were arcing all over the place. I borrowed some money and bought some "reputable" wires and everything was fine again. – TMN Aug 25 '15 at 17:51

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