hi bro...welcome to BMWCM...
will try to answer some of the questions posed by you...
1. Betul ke BMW ni kereta yg sangat manja or senang rosak?
If you manage to get a good condition 2nd hand BMW and take care of it well e.g. frequent engine oil change maybe every 5,000 km, then, the car should be able to serve you well...all types of cars irrespective of make would surely have wear and tear e.g. engine and gearbox mountings,bushes, absorbers...even tyres
2. Sparepart mahal?
spareparts...you will own a BMW which was previously worth around 200K, the car price depreciates...but not the parts...if you know where to get your parts and a good place to fix them, then it shouldn't be too expensive
3. Hanya org yg bergaji RM10 keatas je boleh pakai (sbb sekali baiki mau ribu2)
it's not always that your repairs will go up til thousands...unless your gearbox and engine rosak...do keep some $$ for contingency purpose for repairs from time to time
4. sekali service tukar engin oil and filter berapa?
depends on the oil you choose e.g. semi or fully synthetic...even semi-synthetic has different prices e.g. castrol magnatec 4L is RM81, Mobil super 4L RM90. Different members here use different types of oil to suit their own preferences/ needs. oil filter around RM25 i think...
5. boleh ke pakai tayar biasa jer, Dunlop ke, continental ke, falken ke?
haha...apa apa jenama tayar pun boleh guna...except for tayar lori atau tractor...
bro...owning a BMW is not just being able to pay for the monthly installments...you need to have the money for the periodic services, the money for wear and tear, insurance, road tax...i would suggest that you try to find out what is the monthly installment like and how much do you have left after deducting all the expenses from your salary...if it's just cukup cukup, i would advice you to save for a few more years. This is because you've mentioned, you do not want the car parked in your porch for display only...i'm not trying to frighten you, but this is the reality...
good luck!!!