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Rmldaytona, Certified Technician
Category: Car
Satisfied Customers: 1889
Experience:  ASE Certified. 13 years Automotive Experience.
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groan..Feel a slight vibration from brake pedal when the noise occurs.

Resolved Question:

I have an inter-mitant noise when I step on the brakes that sounds like a moan/groan. Car can be cold or hot,doesn't make any difference. Feel a slight vibration from brake pedal when the noise occurs.
Submitted: 8 years ago.
Category: Car
Expert:  Rmldaytona replied 8 years ago.


What is the year, make, model? What speeds does this happen?



Customer: replied 8 years ago.
The car in question is a 2004 Infiniti FX35. The noise occurs mostly at very low speed. When I leave the garage in the morning, or when I am travelling on the freeway during heavy traffic at low speeds. I would say in the five to twenty mph range. Hope this helps. Thanks.
Expert:  Rmldaytona replied 8 years ago.



Sounds to me like you have a false antilock brakes (ABS) activation.


Antilock brakes keep your wheels from locking up during a panic stop.


Most ABS false activations are caused by faulty speed sensors. A technician needs to drive the vehicle and monitor the speed sensors on a scantool. When the problem occurs, the tech can pinpoint which sensor is acting up through data stream.



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