I have a new A3 Black Edition auto. Within four weeks of delivery the engine cut out whilst driving, the drivetrain under positive power. The car rolled to a complete halt, the retardation entirely commensurate with the wheels driving a dead engine - it did not freewheel. The instrument panel remained powered and displayed no warning lights or fault messages.

I shut the car down and after a pause restarted. Since then it has operated normally.

The Distributor has found no data supporting the shutdown in the diagnostic system.

Can anyone shed any light?

Is it petrol, diesel, or hybrid?

It’s petrol - mild hybrid.

Edited 2 hours ago2 hr by Bobs dad

See this topic which may or may not be related.

https://www.audiownersclub.com/forums/topic/24906-alternator-failure-related-to-mild-hybrid-system

Hi,

Thank you for your response. I saw this thread whilst researching before I posted my own.

I’m not convinced I have an alternator problem. In my case it is the engine which suddenly died whilst under way. There were no abnormal indications at all on the dash and there’s no evidence of any event in the diagnostics record. In my opinion that indicates that the engine behaved correctly in response to its inputs (so nothing to report) but possibly one of those inputs was erroneous.

The dealer is unable, or unwilling, to troubleshoot the matter.