Idle servo broke again.

There is this 'servo' thing that controls the idling speed of the car. There's something wrong with it and the car is not idling at the proper speeds. The thing have been replaced twice before, the most recent was in March and costs me RM 160.00. Luckily for me the people at EON checked their database, saw the records and decided not to charge me anything for a new replacement.The thing look like some kind of gear mechanism and made of plastic & part of it broke. I hope this time the part lasts but I'm not very optimistic. If it breaks again the mechanic suggests that I replace the whole part , I don't know - is it the EFI thing? and that costs RM700+.