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Marco S.

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Brake grinding noise at high speed | VW

Hello,

I have a question.

From about 90 km/h on the motorway, after a few kilometers I have the problem that even with a slight right turn (load distribution minimally to the left) a shrill whistling comes from the rear right.

If I steer the load directly to the other side, i.e. steer slightly to the left, it is gone. Also, if I only lightly press the brake pedal or pull the handbrake minimally, the whistling (grinding) is gone. It will probably be the disc or the brake pad that is rubbing. The wheel is also boiling hot.

Normally I would suspect the caliper, but it has been replaced twice in the last 3 years.

The previous owner complained about this until the end.

I have already completely relaxed the handbrake for testing, it is not due to that.

Does anyone have an idea what could be causing the brake to rub?

Could something like this be caused by a defective wheel bearing, possibly axial play?

I am a bit unsure. I only know the typical defective grinding bearings.

Already checked

The user reports a grinding noise from the rear right brake at speeds above 90 km/h, especially during slight right turns. The wheel also gets very hot. The brake caliper has been replaced twice in the last 3 years. The user suspects a defective wheel bearing.

#Noises

VW

1.9 TDI

Automatikgetriebe

💬12

Own solution

Marco S.

It was due to the parking brake cable. One of the two seems to have been replaced at some point and it was a different length. As a result, the pad on the rear right was always in slight contact with the disc. Installed two new brake cables and the fault is gone.

Comments (12)

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  1. Engelbert K.

    Hello,

    Yes, I had the same problem with my Opel Astra, BMW Compact and also with my Mercedes A-170. Each time the problem was worn brake pads. Usually the brake pads have a spring steel, a thin strip of sheet metal, which touches the brake disc after the brake pads are worn and thus creates the whistling noise. This is intentional to acoustically signal to the driver that the pads should be replaced.

    If that's the case with you, the whistling is not a big deal.

    I hope I could help you with the information.

    Sincerely,

    Engelbert

    3
  3. Dragan B.

    Have you tried bleeding them? Or possibly a defective wheel bearing, but you would have heard noises a long time ago... Best regards, Dragan

  4. Rrustem M.

    Hello, I think it's the wheel bearing and not the brake

    3
  5. Kai H.

    I would check the brake on that side to see if it is slightly stuck and getting hot after a while, which would make the grease in the wheel bearing too liquid and cause the noise to come from the wheel bearing.

    2
  7. Birger S.

    The brake pads are sticking in the caliper bracket. This causes the brake to get hot and start to squeal.

  8. Sven K.

    Can you recreate a stiff wheel on the lift? If so, open the bleeder valve. If the wheel is then easy to turn again, the ESP hydraulic unit is probably defective.

  9. Marco S.

    I only have a pit available, but when it's jacked up, the wheel turns normally and easily like the left one.

  10. Marco S.

    I'll check that in the next few days. I've already ordered new pads.

  11. Birger S.

    Then clean the caliper carrier properly so that the pads can really move easily inside.

  12. Faraj I.

    Brake pads or wheel bearings.

  13. Jürgen C.

    Check wheel bearings and brake calipers