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Old 03-23-2007, 08:42 PM   #1
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2006 WRX
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Default Limited number of ECU flashes?

This article states that after 100 or so reflashes the ECU becomes dead. Is that true?

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Old 03-23-2007, 10:15 PM   #2
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2005 vette c6 z51
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I've heard of this....but COBB seems to have sorted everything out.
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Old 03-23-2007, 11:02 PM   #3
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not true. if you search you will find people with over 200+ flashes
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Old 03-23-2007, 11:58 PM   #4
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Originally Posted by AWDWRXLOVER
not true. if you search you will find people with over 2000+ flashes
Fixed for accuracy.

On enginuity some people came out and said that the 100 reflash is not a limit, it is a minimum reflash guarantee for the flash memory as specified by the manufacturer. Anything after 100 and it is possible that you could have data corruption, as mentioned there are people with 20x this number without issue so far.
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Old 03-26-2007, 04:16 PM   #5
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2008 STI


You're basically flashing a USB mass storage like device. After a number of writes/rewrites there is more of a chance of a corruption of data. ECU being one of the most important things on your car has to have a very high reliability thus 100 (I am basing this off what I read on here, it could be less it could be more) and below keeps it in the most reliable area. There is no physical or electronic lock preventing you from flashing over and over again but you have to keep in mind that with every flash you are slowly eating away at your ECU's reliability.
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Old 04-02-2007, 10:54 AM   #6
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2002 Impreza TS
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Aye, this is the same reason that your PC manufactuter will put a big warning in the installation notes if you ever reflash your BIOS on your CPU. Statistically the chances of damage are low, but they're high enough that they're covering their legal liability...
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Old 04-02-2007, 11:31 AM   #7
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2009 BMW 135i


Who has done 2000? I know I've seen two or three claims of 300+. I'm probably at 70-80 myself.

Nardvark: That warning has nothing to do with how many times you can flash, just that if it fails for some reason (you lose power, your 3yo pulls the plug, etc). So it isn't a good idea to flash your computer during a thunderstorm. On a car, it'd be hard to pull the ground off the battery on accident during a reflash, and you don't have to worry about losing utility power.
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Old 04-02-2007, 11:57 AM   #8
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I have 350+ Flashes on my 05 STi.

I use Enginuity...

It has great support and sweet logging w/ map tracing!!
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