Turn on the headlights and try to start the engine. If the headlights dim when you turn on the starter, then the battery is most likely discharged. This problem can be easily overcome by starting the engine from another battery, for example, from your friend's car (see below).
A. Check the high-tension wires for proper contact with the spark plugs. Push the wire caps tighter onto the spark plugs - 4-cylinder engine
B. Check the reliability of the contact of the high-voltage wires with the ignition coil - 4-cylinder engine
C. Check the condition and reliability of the ignition coil electrical connector - 4-cylinder engine
D. Turn off the ignition and check the air flow sensor connector for proper operation and reliability
E. Check the reliability of the fastening of the wire tips to the battery terminals (the battery is located in the luggage compartment)
With the ignition off, check the electrical connectors for tightness and if you suspect they are damp, spray them with a water-absorbing aerosol such as WD40
Original publication posted on the website: www.bmwman.ru