Knocking noise in VW passat

Yes if you bought it 6 wks ago and it started a few days after buying you should have contacted them straight away. You may have progressively made the damage worse while continuing to drive over rough roads though.

No one here knows what is covered by your warranty. Could just be a basic engine & gearbox warranty. The dealer is also not obliged to pay any main dealer VW invoices on your behalf.

Sounds like drop links , front and rear yes , Any local garages near you that have a ramp and willing to put it up and check it for you as a simple task.

Funny coming across this. I have a 2021 Passat with a noise from the suspension that nobody seems to be able to find. I had to double check if I was OP at some point for this. I was convinced it was from the rear but any passenger in any other seat tells me it's the front left. I had bushings done to try fix but still same. Drop links also. Mechanics swinging out of it on a ramp can't get it but will hear it on a short drive. Metal on metal scraping noise not overly loud while going over speed bumps at any speed. Like exhaust brackets not tight (they are). I have been told by more than one place that this is something in passats of that year. I put up with it now.

Vw are cars that parts wear on and keeps on giving , Track rod inner arms is another as wheel has to be off the ground and grab wheel at 9 and 3 and pull / push you will hear it knocking and feel movement and check outer track rod end is good.

Trying to think if that model has twin upper suspension arms like Audi.

big mileage cars can have wear in top mounting in shocks or valve in shock noisey

Make sure wheel nut tight.

Anything stuck in rear tyres like a stone in between the threads , rotating noise if there for 12 months should have gone if it was wheel balance stuck on small rims and tipping calliper but you goy new tyres and rebalanced.

Cable ties in the wrong place would have worn away been plastic or nylon.

Another thing i forgot is worn door hinges can flex door but normally on high mileage cars and easy to check movement lifting car up and down.

If a wheel bearing was gone on front wheel driving along a straight road and drift to the left to put weight on it , then to the right noise pitch will change to indicate noise comes and goes from right to left.

Another favourite is a stone chip trapped on the calliper scratching the brake disc common on stone driveways.

Ah so the faster you go the louder the drone goes and going from side to side alters the pitch.

All VW’s of that era creek over bumps. I’ve probably sold and driven 100’s of them at this stage