Jun 4, 2025
4
1
Hi Everyone!

Seeing mixed feelings on what I think the issue on my 67-Plate Leon could be, there's no exact matches on the issue(s) I've noticed, but a fair few similar. I'm not the best on terminology and I'll put as much in as I feel can be helpful - so bear with me :ROFLMAO:

Approx 2-3 weeks ago, I went over a slightly dislodged drain cover at a decent speed going round a bend. Unfortunately, my Nearside Front Left tyre hand a bulge in it the size of King Kong's fist - not ideal. Got it home, tyre changed & balanced (like for like) and assumed my problems would be over.
*Spoiler* - they weren't.

I started driving, again it again a few days after the tyre change, but came to notice a barely noticeable light 'Humming' sound that sounded like it was coming from the nearside front left area, but only when travelling around 40-42mph, anything either side - Nothing of note.

However, the Humming returns somewhat louder, though intermittent (every other second or so, like a phone on vibrate almost, still not exactly loud though) at between 60-65mph only, literally nothing when travelling at any more/less. I felt like I had some further light humming during quick deceleration, but unsure if I was just gaslighting myself at that point.

I've had it off the road for a couple weeks due to being away, though when I came back this week and took the car for a quick run to see what' what, I noticed there is almost a whirling/flapping sound when breaking/decelerating the car to a stop. Which to me sounds like contact between two components, but I'm not in the know by any means.

From what I can see online, I'm seeing a generally 50/50 split on it being a wheel barring issue OR a gearbox/drivetrain(?) issue.

Anyone suffered with the same, or able to give me any quick wins to check-off before I take it to a garage? My local SEAT garage wanted £180 for an hour of diagnosis, and I don't know how long a full deep dive is going to take...

Thanks!
Al
 
Additional: A local mechanic who had a very quick look around/drive for me seemed to suspect ''gearbox baring issue'', but pointed out they outsource 95% of their gearbox jobs, quoting a months wait an a lovely £1000 approximate bill, and said it's a very very loose guess on the issue/costs due to them generally not doing gearboxes.

Am I buggered?
 
When they fitted the new tyre did they also check your wheel is still round?

Assuming your wheel is round and not buckled! I would suspect your wheel bearing for a rhythmic noise after a hard wheel impact. They are not know to be very durable.

Much cheaper to replace than anything gearbox related!
 
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When they fitted the new tyre did they also check your wheel is still round?

Assuming your wheel is round and not buckled! I would suspect your wheel bearing for a rhythmic noise after a hard wheel impact. They are not know to be very durable.

Much cheaper to replace than anything gearbox related!
Hi bud, far as I could tell they did check for buckling when the tyre was changed - the fella was pretty thorough and came back to check what was what when i was still having issues.

I'm still fairly certain it'll be the wheel barring personally, but time will tell - just need to get it down to a garage that isnt going to charge the earth for a diagnosis! Then i can at least assess my options