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Old January 22nd, 2020, 03:03   #3
Certified Volkswagen Nut Vendor
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Join Date: Dec 2001
Location: St Louis
Fuel Economy: fantastic

I figured at least some of the reason for the battery manufacturer and serial number was for warranty purposes, which is of no concern to me. And the Ah rating of 59 was the same for both the original Exide and the replacement Varta. I just wanted to be able to do it all correctly.

Like I said, the Autel at least let me get in there and confirm the Ah was input, and it had already auto-populated the serial number as '111111111' so maybe that is their way around it, just changing it so the Gateway recognizes it as new.

We've run into a problem before on a BMW where the tech (not me) did not tell the car a new battery was installed, and the ECU had already stopped trying to charge the old battery that was dead. So the new battery went flat several days later, and after some sporadic searching and trying to condemn an $800 alternator, I found out how to properly reset it, and it was fine (after we also recharged the new-but-flat battery with an appropriate AGM friendly charger).
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