Hi there, last Thursday night I was driving home and my service airbag light came on, I didn't think much of it, pulled into my drive way and turned off the car and got out. There was a glugging noise coming from the back side of the car, passenger side. I looked under the car, no leaking, no signs of anything, it stopped after about 30 seconds. So the next day I took it to my mechanic, he didn't hear the noise and the service airbag light didn't come on, he thought it was all the rain we've gotten recently, so I didn't drive anywhere this weekend, drove yesterday and heard the noise again and the service airbag light came on. This noise is heard whenever the car comes to a stop, like there's something swishing around in one of the tanks, there's been no loss in the gas level or oil, or anything at that. No other lights have come on yet. It's due for an oil change in 300km, currently at about 119km. Also when the throttle cap closes when I turn off the car it's louder than usual.. But I'm not sure if it's been like that before or not. Anyway, that just about sums it up, sorry about the long post. Just wondering if it's something that requires immediate attention. Thanks!