Originally posted by mlsmith45:

when the price is close, what is better to do?

If you can spare the time to repair a low reliability part during race, building a new part gives you more performance.

Originally posted by mlsmith45:

Also, can you slow down the reliability of parts?

Drivers start complaining about the car when reliability is around 30%. That's when the chance of a part breaking significantly increases. Some traits drop that threshold to 20% so parts last longer.

Originally posted by mlsmith45:

What does repairing them in game do?

I replied here: https://steamhost.cn/steamcommunity_com/app/2052040/discussions/0/603034778380383510/#c603035000090138450