The most common leaks we see from the turbos involve the drainback tube that runs into the oil pan. the repair is quite easy and cheap to repair. If the oil is seeping from the housing a rebuilt turbo may be in order. Past experience has shown that slight seepage is common on older high mileage units.
ASE Master Technician, Lead Technician for Deutsch American Inc. Over 6 years of Import experience-specializing in German Automobiles.