hello i have previously asked for help and have had some tips about my tcs error i have replaced battery garage found no fault codes stored they checked wires and they say it is ecu but i have to wait for it too breakdown for them to fix it what else could it be?????

Wheel speed sensor?

Or signal wire to sensor,

 

Gummed up chopper disc(s).

 

Well, that's 3 cheaper suggestions that should have occurred to any qualified mechanic.

cheers