This ambient sound effect was recorded with high quality sound equipment and comes from a sound library called BMW 530D E60 which is pack of 152 high quality audio files with a total length of 119 minutes. In this library you'll find various engine sounds recorded onboard and from exterior perspectives, along with foley and other sound effects. You can use this sound for free, and if you need a whole package of ambients you can support my work and get it for 40$ here: <a href="http://soundholder.com/product/sound-library-bmw-530d/" rel="nofollow">http://soundholder.com/product/sound-library-bmw-530d/</a> Also here's a 10% discount code for all freesound users, just type : freesound in discount window. Enjoy!