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I purchased my 2009 Mazda 3 new with a 2L petrol engine, manual transmission, and iStop.

I would like to disable this iStop feature completely. Is there any DIY way to do this, or must I take it back to the dealer?

  • Take it to the dealer. – Moab May 22 '18 at 19:23
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    @Moab - The dealer won't do it. – Pᴀᴜʟsᴛᴇʀ2 May 22 '18 at 19:37
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    Then he would need to take it to an aftermarket mazda tuner that has software that can do it. – Moab May 22 '18 at 19:40
  • For what it's worth I'm a programmer with experience in embedded systems so my definition of DIY may be slightly more expansive here. If it's all proprietary protocols and software I'm not going to try reverse engineering that (though others perhaps have already...?). – rcampbell May 23 '18 at 5:16
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    Forget it. I´m a programmer too, but those car-computers usually have some flash memory you can only access with custom protocol and then, one bit turns off the stop-feature and the next one may turn off ESP or contain the fuel mapping you´ll mess up. There out to be some tuner in your area who can do the mod for a few bucks. – Daniel May 23 '18 at 10:02

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