Thanks touring!
Working on solving this code for a year, I am getting desperate -

all new O2 sensors (rears twice)
swapped injectors/coils/plugs between banks - error didn't change bank
new fuel filter (pressure regulator)
New MAF
no intake leaks, new rubber boot into throttle body
new DISA O ring
new Idle control valve
new valve cover gasket
New gas cap
New gaskets/bolts between exhaust manifold and first section of tailpipe

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2004, X5, 3.0, 202k+