I'm having some rough downshifting problems.
Mainly very slow speed 2/1. Have ZF 6 transmission fluid and a filter on order.

Could someone explain the software update.
Where do I go to get that done?

I was wanting to take my BMW to a specialized ZF center.
Looked but no luck finding a ZF repair in the area.
A lotta guys named Bubba say they can "fixer up"

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2003 4.6is X5
2003 525it
2003 E53 X5 Standard shift