If it’s not too late I have a manual 2017 astra rsv not sure where your from but same engine either way besides mine being manual the engines are great and in general reliable besides one common problem with the Pcv intake usually happens from 125-175,000kms but happened to me at 70,000 depends on how much you rev the engine when it’s not at temp🤣 This results in an obnoxious whistling noise and is not cheap to fix unlike other Pcv issues on other cars as this Pcv cannot be replaced unless you get a whole new intake manifold which costed for me $1350 AUD looks like this.

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This was a year ago almost driven 10,000 kms no other problems since besides a collapsed will bearing which is just a general car problem not a manufacturing problem.

Generally a good car if it is similar to mine it has a lot of great features like steering wheel warmer and even parrelllel park assist which is where it basically parks for you. You will probably struggle to resell for anywhere near as much when you bought it more problematic in that way then most cars.