How to make car AI using WheelColliders turn exactly 90 degrees?

Hi,

I am making a car AI and I want it to make a perfect 90 degree turn. However I always end up at a slightly off angle and it starts going off the road.

I am using a trigger to tell when the car needs to turn and I pass the direction of the turn

My current code:

 public class Turn : MonoBehaviour {
 
     public float turnRadius;
     public Direction ifZeroDirection;
 
     public enum Direction {
         Left,
         Right
     }
 
     private void OnTriggerEnter(Collider other) {
         SimpleCarController car = other.transform.root.GetComponent<SimpleCarController>();
         //car.ReduceSpeed(5);
         car.Steer(turnRadius, ifZeroDirection);
     }
 }

SimpleCarController Steer function:

   public void Steer(float angle, Turn.Direction ifZeroDirection) {
         turning = true;
         newAngle = angle;
         float steering = 0.5f;
         if (ifZeroDirection == Turn.Direction.Right) addSteering = steering;
         else addSteering = -steering;
     }

addSteering is basicly float steering = maxSteeringAngle * addSteering; which is the` axleInfo.rightWheel.steerAngle = steering;`