Yaw rate sensor location

[eurosurplus]

I have a 203 270 CDi '06 model, last week I was driving down a straight road doing around 45 mph when all of a sudden the breaks locked up by themselves as if someone is stepping on the brake pedal really hard. I replaced break light switch, but the problem still remains. My car is a left hand drive, where is the location of the yaw rate sensor in my car. Help please.

 

[meanie]

Can we assume that you've had the fault codes read off?
If not get them read off as a matter of urgency.
If fitted,I would turn the ESP off as a precaution.

 

[whitenemesis]

Yaw rate sensor is located under the floor immediately behind the rear seats.

Even with ESP 'Off' it isn't truly off