Hv exp b4 in my previous 16.5 yrs Corolla car whereby hs changed almost the whole air-con system (of course not all at the same time lah), 1st. the air con compressor -> replaced in JB but 2nd hand part from Sg (cost me ard RM$800), 2ndly, changed all the piping due to some leakage (cost me another RM$300), 3rd, changed the fan coil unit (original in Malaysia, Tangkak, near Malacca) due to small leak at RM$350 (thanks to the boss of the workshop as he is very Kind and not simply over charge me with my Sg plate). By the way, noticed many friends of mine (local), do not bother to check if the air con is in good conditional, they just simply leave it to SA during service (also not sure if the air-con been checked during service). It's advisble to get the air con check at least one a yr.