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I ran a health check on the IS this evening as I needed to reset the 'check hybrid' warning message.

I noticed that within the health check info in the engine section there was a calibration number, in my case is was 353K9000, there were other numbers against other sections. is this an upgrade file? if so is this a dealer only thing or can I get them from other sources?

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Hi there. 

Calibration files are essentially ecu updates. With techstream (if you have it) can be applied to the car using the correct process. 



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