Control 12v buzzer from motorcycle alarm system

Hi, i have a buzzer taken from a motorcycle alarm system, I have tried to connect it directly to 12v but it didn't produce any sound so I think it is controlled by the alarm system and it's a passive buzzer. I want to figure out how to control it from arduino to play a sound. Thanks

Does this help ?http://www.arduino.cc/en/Tutorial/PlayMelody Can you provide a picture of the buzzer?

The buzzer is this:

Did you test it on arduino ?

No I haven't tried

I just tried and it work! But the sound is very low, how can I increase it?

Well it seems normal.. You said its 12v buzzer, however arduino outputs just 5v..

How can I increase it? Using a transistor?

yes :D :D :D :D http://startingelectronics.com/beginners/circuits/arduino-buzzer/

Ok but is there a way without use a 12v external power supply? Only using arduino and the transistor?

Why don't you buy a nice 5V buzzer? XD XD XD They are cheap anyway!!! https://www.sparkfun.com/products/7950

Arduino14: Ok but is there a way without use a 12v external power supply? Only using arduino and the transistor?

I don't know, but it doesn't sound possible too!!!

If the buzzer came from a motorcycle it was designed to be powered by a 12V lead acid battery that is probably rated for at least 7Ah. You cannot run that on less than 12 V and expect it to sound the same and the 12V supply you use will have to be able to supply some current , like a 1350mAh 3S, Lipo batter (12.54V charged).

http://www.hobbyking.com/hobbyking/store/__7313__rhino_1350mah_3s_11_1v_25c_lipoly_pack.html