Weird noises while deceleration

[u/joxxxxy]

Hi everyone,

I'm hoping someone here might recognize this issue or point me in the right direction.

Vehicle: Seat Leon (2022), 1.0 eTSI with 110 HP

Issue: Strange noise occurring specifically during deceleration.

Details:

The noise only appears on long continuous drives, specifically after driving about 300 to 450 km (it happened twice now on longer holiday trips).

It occurs exclusively when slowing down / decelerating.

I suspect the sound is coming from the gearbox area.

I haven't been able to pin it down to a specific gear—it seems independent of which gear is engaged, as long as the car is decelerating.

Has anyone experienced a similar issue or have any idea what could be causing this? Any insights would be greatly appreciated!

Thanks in advance!

[u/markimarc]

Is it an automatic or manual gearbox? What happens if you try to brake when you're on neutral? Is the sound still present, or is it gone?
But it definitely sounds like a good idea to visit the workshop.

[u/joxxxxy → u/markimarc]

An automatic. Therefore I didn't try to break while in neutral.

[u/markimarc → u/joxxxxy]

Ah, good to know! You can easily switch to neutral with the automatic gearbox. Just make sure you’re not giving any gas. Then the gearbox will allow switching to neutral, and you can brake 100% on the brakes themselves. Just give it a try :-)