Hi all, I think I have an issue with the brakes on my Td5 90. There seems to be a 'popping' noise coming from the drivers side front (from the servo I presume). The noise is not constant, and only happens once in a while, mostly when the brake pedal is pressed. When the 'pop' happens when the brake pedal is pressed, I can feel like a notch through the pedal. Had anyone experienced anything like this before?

The braking does not seem to be affected in any way!

I have checked all caliper bolts, and all appear to be torqued correctly, and the defender does not have ABS.