I'd be wary of having the EWL on, it's an automatic MOT failure. 👍
No clue mate, bought the car second hand in September. I'll look for dates on it but it's definitely been replaced at some point.Just a heads up. CRZ have crazy electrical issues when the nomral battery starts going flat even though thos enot in the know change the motor battery. Also I had cutting out problem in a 2.2 type s GT 2007. Loose battery earth on the terminal was seriously aggravated when cornering or braking hard. But yours sounds much more consistant (fault) than random (road conditions and driving). Especially if its doing it in neutral. How old is the battery ?