Ignition coils are the key to efficiency and performance for your BMW.  While newer ignition coils will not generate additional horsepower, they will improve your cars performance by unleashing lost horsepower caused by faulty or old ignition coils.
 
Sluggish acceleration, misfires and rusty terminals are symptoms of a worn coil. Located on the top of your engine, these coils should be inspected replaced as needed or every 100,000 miles. Keep your ignition system in perfect order.