From last few thousand kms ABS used to kick in on plain smooth roads even when the wheels were not locking especially on the right front wheel, as my GT3 were getting old I thought they are causing this but the same continued to happen after change to Michelin Primacy LC I again thought tyres might be culprit, exchanged them with Apollo Acelere from a friends new car but the problem still continued. Connected the ABS ECU to my laptop no error codes were displayed, that got me thinking what was wrong after some deep thinking, I thought why not try cleaning the ABS Sensors on the wheel. Man I was amazed to see the gunk stuck on them, cleaning with towel didn't helped as the gunk was pretty hard, tried with toothbrush and I succeeded in getting them shining once again. The front sensors had brake dust + mud on them comparatively rear ones were in better condition. The whole process took me 1.5 hrs and is pretty easy The sensor is placed behind the disc on the front and on the drums back in the rear. The process is very simple and here are the steps you have to follow 1. Loosen the lug nuts of the wheel whose sensor you want to clean first. 2. Jack up the car. 3. Put jack stand under the car (Not necessary but recommended to prevent car from slipping from the jack) 4. Remove the wheel by removing nuts and put it on side 5. You would see a wire and a allen nut behind the disc/drum. 6. Follow the wire length and you would see a connector near the shocker disconnect the sensor wire from it OR simply disconnect the negative terminal from battery 7. Loosen the Allen nut and pull out the sensor carefully and clean it first with a towel or something like this, next step use a waste toothbrush to clean it thoroughly. 8. Put the sensor back in it's place and tighten the nut. 9. Connect the Sensor back and install the wheel and get the car down. Do this for all the wheels and go for a test drive remember to clean your hand and change your cloths before you enter the car. With the wheels removed I even cleaned the front brake system completely and now don't get the irritating kad kad kad sound due to ABS activating I advice every one to get the ABS Sensors cleaned every-time the brake pads are replaced. NOTE:- Don't do this if you don't know what you are doing.