I financed myself a 2020 Hyundai Elantra Preferred model back a few weeks before valentine’s day. Since then it has been fantastic.
The issue I am running into now is that since I took it to a Hyundai Dealership here in Toronto for its first service, now the brake system loses its vacuum over a few hours (which never once happened before on this vehicle or the previous two); and I sometimes hear either a slight knocking from the front of the cat when idling that goes away after a few seconds, as well as sometimes a rattling from the front when going over a bump in the road.
The braking system seems to function like normal once the engine is started and the vacuum restored, but who really knows for sure until it potentially fails.
I’m taking it back today at their request to have it looked at again. But it has me concerned as it’s my first NEW vehicle and these things only began immediately the next day after the service. The vehicle only has 5600 kilometers on it, so j seriously doubt there is a defect with the vehicle.
As a first time new car owner, is there anything I should learn about this kind of situation?