Coming from the e39 M5, i'm used to having to clean or replace certain items that rob power as they get dirty or old. Common problems for the e39 were MAF sensors, o2 sensors, oil separators, and AIT sensor.

My e63 has about 75k miles on it now and i want to make sure everything is in tip top shape.

Any recommendations on what to clean or replace? TIA

Other than a dirty air filter, not really. Drive and enjoy

Weistec catch can is never a bad idea either. Money well spent in my opinion.