Hi all,
Looking for some advice or shared experiences to help track down an annoying noise issue on my 2018 MK7.5 Golf GTD DSG.
The Issue
There’s a coarse humming/droning noise that kicks in around 40mph+, becomes more noticeable at motorway speeds, and doesn’t change when:
Coasting in neutral
Steering left/right
Applying brakes
Changing gears or throttle input
It’s not overpowering, but noticeable enough to feel like something isn’t right.
What’s Been Done So Far
Replaced all 4 tyres with new Bridgestone Turanza's (to rule out mixed tyre noise)
Rear driver’s side wheel bearing replaced (initial suspicion)
Rear wheels rotated front to back – noise moved to the front passenger side
That wheel was found to have a flat spot, so was straightened
Noise still there, so all front wheel bearings replaced
Ran the car on a ramp up to 60mph – front wheel seen bouncing, even after balancing
Still no change – same noise, same speed range
Other Checks/Observations
Tyres properly inflated and balanced
Bearings are genuine or quality aftermarket
Wheel still shows up/down bounce on ramp
No obvious vibration through the steering wheel
Sound feels like it travels through the chassis rather than being directional
Suspected Next Steps / Possibilities
Based on what I’ve read and advice so far, I’m wondering if it could be:
Inner CV joint wear (noise is consistent with drivetrain speed, and GTDs + DSGs are known for this)
Subframe alignment or slight movement (maybe needs bolts re-seating?)
Worn suspension bushes (especially trailing arms or strut tops)
Warped brake disc or dragging caliper (though there’s no vibration or heat issue)
Worn engine/gearbox mount transmitting extra NVH at speed
What I’m Looking For
Anyone experienced something very similar on a Golf GTD, GTI, or MQB-platform car?
Is inner CV joint the likely next step?
Could it be wheel hop from suspension rather than a rotating part?
Anyone resolved this kind of mystery hum successfully?
Any advice, personal experience, or even “here’s what it was on my car” would be massively appreciated!
Thanks in advance!
