Weird vibration sound after some time of driving.

[Maartin]

Hi all,
So, I've a Passat B5+ 1.9 TDI 2004.
I usually drive my passat to work and back to home which is city area and I usually don't surpass 70+ km/h and no problem is noticed.
Whenever I drive longer distances and I tend to drive around 100-110 km/h for some time, then at some point (not at the beginning) I start to hear and will vibration that comes from motor side (I think). The sound appears when I accelerate even little bit.
Any ideas what could be wrong?
Any similar experiences?

 

[9755]

Have you noticed any odd tire wear?

 

[Maartin]

Have you noticed any odd tire wear?

Tires seem to be fine.

 

[9755]

Maybe check the trans fluid. Wonder if it’s getting hot at the higher speeds. Just a guess. I would imagine a bad mount or bushing would be doing it the whole time

 

[zzdiesel]

Start with balancing the tires to rule that out.

 

[garreth5]

Maybe the motor mounts are going bad.

 

[B0b222]

It also could be dirty or worn spark plugs or damaged inner CV joint.

 

[cjolson140]

my mk4 jetta does exactly the same thing, and I’m pretty sure it’s the brakes dragging. only really happens after driving on the highway for a while. are your brakes hot or even warm after driving a while and not using the brakes at all? do they pulse at all when braking to a stop? mine are definitely dragging even after replacing calipers and master cylinder

my engine mounts aren’t great either, which could be a contributing factor

 

[Scubanero]

It also could be dirty or worn spark plugs or damaged inner CV joint.

It is probably safe to rule out spark plug problems.