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Originally Posted by spike5150
2015 50i with 46k miles. Three "Drivetrain Malfunction" warnings in the last 7 days. Power drops to about 1/4 of normal. All have happened after driving at least 45 mins at highway speeds (comfort mode). Once car is restarted, issue disappears immediately. Have an appointment booked a week from now. Will report back on findings.
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Dealer found a pinhole leak in the turbo cooler and no coolant left. Replaced under warranty. Hope that doesn't lead to further issues down the road.