AMENDED - Brake Shudder

[bucephalus]

This topic was originally titled “Caliper Piston / s”, but is amended to better reflect the braking problem on my 2007 RX350 front wheels.

Am experiencing symptoms like a warped rotor (new BDAs twice in last 12 months); a pulsating feel similar to but not ABS. This occurs when braking at speeds <70Kmh. My mechanic has done all the usual; Dial gauge, replace rotors (DBA), pads (Bendix), OBD codes, and ALL tyres have been checked for balance and then rotated. However, problem still exists despite being in workshop for 5 days now.

Any advice gratefully received. Thanks.