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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 05-22-2014, 05:07 AM
Karthigan Karthigan is offline
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Location: Toronto, ON
Join Date: Aug 2008
Posts: 141
Mein Auto: 97 BMW 528i - 5SPD Manual
E39 528i (01/97 build date) & Key Programming via AK90

Hi All,

I need some help, I think my Master Keys are definitely defective and can not be programmed.

First of all, a little bit of history: http://www.bimmerfest.com/forums/sho...d.php?t=342941

In summary, I lost EWS programming on both of my Master Keys and now I am stranded without an ability to drive my vehicle.

This is when I have decided the purchase AK90, and attempted to recover my Master Keys.

I have setup AK90 correctly, and everything is up and running without a problem. I remembered to scrape off the silicone of the MCU chipset in order for the AK90 unit to read the EWS.

So, when it read the EWS for the first time, all keys 1 thru 5 were in use (I saved the BIN file as a back-up), now I decided for the AK90 to read my two defective Master Keys, nothing was showing up. Meaning, no VIN# attached, no mileage, it basically had the key type: EWS-2 and the key position: either 1 or 2 depending on which key is inserted into the AK90 module.

At this point, after loading the back-up BIN file to write back to EWS, I decided to clear all the keys that are in use. So EWS module was programmed back with no keys utilized (bear in mind: no keys were ever locked, which makes it interesting, as I thought the EWS might have locked my keys from being used).

The write process back to EWS went 100% complete without any issues. Then I decided to again re-read the EWS module, and save the 2nd BIN file (the one with all the keys cleared & not in use).

This is the part I think I messed up or the keys are actually damaged and I need new blank ones: I decided to mark Key #1 and Key #2 as in use for EWS and write back to EWS, it also went without a hitch. But when I tried to write the Keys with the same EWS settings (Key #1 and Key #2 as being in use), the write process completes, but when I read back the key, it basically has nothing written - no VIN #/ no milage, just the same info as stated above, the key type & key position# (1 or 2), the write process also fails if I try to write to key #3, key #4, etc. etc.

Can anyone please help me?
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1997, 528i, ak90, e39, key, master, programming

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