What platform you're playing on (for PC also state Steam or Oculus).
PC, Steam
What your PC setup/build is like (graphics card, processor etc.).
GTX 1080, i5-4690K
Whether you're a Standard or Deluxe user (doesn't apply to Oculus).
Standard
Whether or not you have any non-standard peripherals connected, like steering wheels, gaming mice etc.
TMX, T3PA, TH8a
After the last steam update (almost 8GB of data) no engine sounds. Other sounds (music, damage etc.) are fine.