The ignition coils are mounted directly on the spark plugs, connected to each other by a metal-ceramic core to suppress radio interference, and are bolted to the cylinder head. The electronic components of the ignition system are connected to the ignition coil by means of a plug connection (PC).
The resistance of the ignition coil windings is primary – 0.8±0.1 Ohm; secondary - not measured. Resistance of the connecting core (tip) is 5.0±0.5 kOhm.
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Ignition Coil — General Information (BMW X5 E53)
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