Hi there,

My A1 1.6 TDI Sport 2017 makes this high pitched noise which sounds like it’s coming from the right rear side. It more tends to happen when the weather is cold. It starts when the car has been going for a couple miles and stops as soon as you turn the engine off. I have attached a video of the noise. Does anyone know what this could be?

 

Thanks

 

 

IMG_2335.MOV

Edited December 11, 2025Dec 11 by redaudi20

4 hours ago, redaudi20 said:

 

Hi could be a warped disc or a calliper hanging on.

Steve.

 

 

Hi there,

My A1 1.6 TDI Sport 2017 makes this high pitched noise which sounds like it’s coming from the right rear side. It more tends to happen when the weather is cold. It starts when the car has been going for a couple miles and stops as soon as you turn the engine off. I have attached a video of the noise. Does anyone know what this could be?

 

Thanks

 

 

IMG_2335.MOV

 

Should be easy to find up on a ramp .  Follow the sound ...    Going off when the engine is off says to me more electrical bias , than mechanical ...   Like a pump or relay possibly...   Does it still make the noise with only the ignition on ? 

Edited December 12, 2025Dec 12 by Audisq524

I bought a 2nd hand A1 TDI from a garage in Plymouth. It too had the same high pitched squeal which sounded louder from the rear right of the car, both inside and outside.

We took our car to a local, trusted workshop for a service & they identified the engine bay fuel filter canister had never been replaced in its 75k history, despite the service history showing complete. A new filter was fitted and 10k later the car continues to run smoothly and quietly.