OP= original poster

OEM= original equipment

the tints you can have depends on your state. different states have different regulations. A decent tint job should cost between $150-$200

 

just in case you didnt catch this edit..

edit: sorry i thought OP was a brand so i looked it up and found out they are on a lot of BMWs... i'm not sure though.. but i think i answered the question, (From autozone = $19.99) they had a bunch of others one too for cheap, but i highly recommend kragen or pepboys (a lot more diversity)

 

It looks like you live in california like me so if I'm not mistaken your rear windshield and rear windows can go as low as 5% (havent seen anything lower) NON REFLEXIVE. Your front windows technically shouldnt be tinted (the visible light percentage is so high I havent seen tint made thats light enough to be considered legal) BUT generally speaking you wont get pulled over for anything over 35% because at that point it looks like stock tinted glass which is a layer of film inside the glass and is legal. I would suggest 20% in the rear unless you have a black car which then I would suggest 5%. Good luck and if you try to tint it yourself it will be a lot cheaper but it is NOT an easy thing to do. I suggest going to a pro for anywhere from $125 to$200 (plus many pros have warranties)

 

i paid 180 (plus 20 dollar tip so 200) for mine and it got a lifetime warrenty.. i say let someone experienced do it so they can always re-do it if its f'd up