Grumbling / vibration noise and rear lower arms starting to corrode

[P Adams]

I had my, from new, 2015 B8 Passat GT saloon 2.0tdi in to my local vw dealer where I purchased it, for it to have a diagnostic on a growling / vibration type noise coming from the front of the car / engine bay when I accelerate hard in first, second and third gears. It’s intermittent and only happens when the car is fully warmed up and not cold. It doesn’t manifest itself when stationary and revving the engine.

I took it in before Christmas and one of the master technicians I know came out with me for a test drive. I couldn’t replicate the noise in the first 10 minutes or so when accelerating hard but when driving back from about four miles away with the car fully warmed up it did manifest itself and the technician was unsure what it might be on only a shortish test drive. Returning to vw we stopped and I revved the car while stationary with him looking under the bonnet. He took it back into the workshop then showed me he had tied some coolant flexible pipe work going from the engine bay through the bulkhead together with some cable ties and looked at a few other areas through the bulkhead into the car. Fixed the issue completely so very happy with that as it’s such a quiet car.

They also did a health / inspection check as they always do, and everything is ticked green apart from an amber advisory on ‘both rear lower arms starting to corrode’. They obviously gave a price of £718.92 for replacing them! Just wondered if anyone had any thoughts / experience on this please?

Thank you