whats wrong with my godot car driving/drifting code?

i cant figure oot how to make my car drift i got the movement down but then i tried implementing drifting but i cant figure it ou my project wont run when i try with this code
THE CODE:
extends VehicleBody3D

var max_rpm = 1000
var max_torque = 200
var normal_steering_factor = 0.4
var drift_steering_factor = 0.6
var normal_friction = 1.0
var drift_friction = 0.3

func _process(delta):
car_reset()

func _physics_process(delta):
var steering_factor = normal_steering_factor
var friction_factor = normal_friction

if Input.is_action_pressed("drift"):
steering_factor = drift_steering_factor
friction_factor = drift_friction

steering = lerp(steering, Input.get_axis("right", "left") steering_factor, 5 delta)

var acceleration = Input.get_axis("back", "forward")
var rpm = $backleftwheel.get_rpm()

$backleftwheel.engine_force = acceleration max_torque (1 - rpm / max_rpm)
$backrightwheel.engine_force = acceleration max_torque (1 - rpm / max_rpm)

# Adjust friction based on drifting
$backleftwheel.friction_slip = friction_factor
$backrightwheel.friction_slip = friction_factor

func car_reset():
if Input.is_action_just_pressed("reset rotation"):
rotate_z(180)