LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> BMW >> 2012 >> 335xi Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Performance - Functional Description - E92 >> Engine Performance - Functional Description >> Ignition >> System overview
April 5, 2026: LEMON Manuals is launched! Read the announcement.

System overview

The following graphic shows a system overview of the ignition in engine N55:

Fig 1: Spark Plug - Circuit Diagram
G09871881Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Power distribution box, engine compartment
2 Ignition and injection relay
3 Digital engine electronics (DME)
4 Spark plug, cylinder 1
5 Ignition coil, cylinder 1
6 Spark plug, cylinder 2
7 Ignition coil, cylinder 2
8 Spark plug, cylinder 3
9 Ignition coil, cylinder 3
10 Spark plug, cylinder 4
11 Ignition coil, cylinder 4
12 Spark plug, cylinder 5
13 Ignition coil, cylinder 5
14 Spark plug, cylinder 6
15 Ignition coil, cylinder 6