Beej Mantra of Rahu is given below in Hindi and English. The audio file is also there. If you want to download the Rahu Mantra you can send me a mail.
ॐ भ्रां भ्रीं भ्रों स: राहवे नमः
Aum Bhran Bhrin Bhron Se Rahve Namah
Rahu Beeja Mantra Audio MP3
This mantra is very effective when you have issues of Rahu in horoscope. But this mantra is not everyone. You should not read this mantra if you are a brahmin.
If you still wish to go for this mantra, you can write this on plain paper (minimum 108 times a day) and you can expect benefits of Rahu Mantra.
Benefits: After a week you can expect mental peace, calmness and you will be able to understand the facts around you. If you are in confusion and if you have double mind, if you dont know what to do and what is happening the Rahu Beej Mantra is the key.