The drive shaft got rubber boot to cover the gear that connect between tire and with rotating drive shaft. The boot prevent dirt from entering the gear joint there where grease will gather dirt.

The rubber is simple only and replacement will not take long time. RM500 for the part is expensive but probably that is how expensive the authorized service center charged for it. You can go to any workshop for much cheaper price. I have no idea how much but will try to Google it

Maybe this is the reason the price is so high. But they never properly explain to me the actual situation. All the staff is not so well versed.

Me at Tmn Perindustrian Puchong. Yes they actually always do a throughout check and highlight the problem if there is. But this time after 2 stuff also can't relate the issue to me clearly. Or it's me that cannot get what they trying to say.
Anyway will look outside for more opinion / alternative..