Re: Need For Speed Rivals [PC] + Logitech G29 some buttons doesnt works

First off, let me start by saying welcome to EA’s “Answer HQ”.
Answer HQ isn't just an ordinary message board or support center. It's a new approach to our community experience and a fun way of helping other players or to get answers (from players & experts)and get back in the game!

1) NFS Rivals officially don't support driving Wheels. Se this solution: Need for Speed Rivals Steering Wheel Support

2) Try to use the Logitech's official software  or third party key mapping software e.g. Xpadder & see if they will make that "problematic" buttons work.

p.s.: Sorry, I don't have personal experiences with G29 nor I know the exact solution to your problem.