The BMW 3 Series cannot start the car after cleaning the air intake system.

Hello, in view of this situation. My suggestions are as follows: first, check whether the air inlet is not blown clean during cleaning, resulting in some water entering the cylinder and wetting the spark plug, which can not be started. Remove the spark plug, blow it into the cylinder, hit the motor several times to see if there is water, and then install the spark plug. Second, see if it is assembled in place, such as whether the plug is plugged in and whether the ground is installed. Third, match the throttle with the computer and see the fault code. If it doesn't affect the startup, delete it. Fourth, use a charger to help start the ignition.

If in doubt, please consult a car master. 4S shop professional technician, 10 minutes to solve.