The trick is to use the increased turning of the non-malfunctioning direction to turn corners. You know, if there's a left turn and the left turning is malfunctioning, you start turning right until you face left, and can continue driving forward. I wanted it to be a bit of a risk/reward thing; do you fix your turning now and risk losing time and getting a malfunction at an inconvenient time, or continue driving but with only one direction available?
I do admit that the game may be a bit overly difficult, though. I didn't have time to test it properly lol.