how can i create seamless loop audio for cars in audacity for unity game?

im tryng to make a car game but i have problem with the audio, cause everytime it loops again it makes a strange noise everytime the file is played again, how can i fix.
here’s the audio: https://drive.google.com/file/d/1NHVaaV1_dErF0VD432pYtYEGVSU84CLh/view?usp=sharing

I haven’t checked your link, but Audacity has a new coder for mp3 that is completely jank. It puts a little bit of silence at the beginning and end of the track that is impossible to remove (in my experience). You can check this yourself by putting the same file back in to Audacity.

Export to .wav instead and you can loop seemlessly.