Question about 2003 Hyundai Santa Fe

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Do after market performance chips work ?

Work for milage and general performance ? I have a 2004 3.5 v-6 front wheel drive.

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A legitimate replacement chip can maybe void the warranty, but also be made to change engine characteristics to supply more power or better economy but will not likely do both.  Otherwise, why wouldn't the manufacturer use different performance curve?    
Beware of something offered by hundreds of 'affiliates' that does nothing but tamper with the air-fuel ratio and sells for $20-$80 US and 'installs in minutes.' The vast majority of the 16,000+ offers on eBay are total frauds and many of the rest may alter the pollution output of the engine to the point that in some states could cost you even more than the chip.
"Super-chips" 
Continue doing research before you spend even 'only a few bucks' on any of them.   I totally understand the urge, I still get it too, but lose it again after doing due diligence before ordering.

Posted on Jan 07, 2009

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I think this site does a great job telling you about the performance chips and if they work!

Posted on Aug 31, 2009

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