Manual sections

Wiring diagrams

• Abbreviations
• Airbag
• Audio, Navigation, Anti-Theft and Restraints - Repair - E90/E91
• Automatic HVAC System
• Automatic Trans
• Automatic Transmission - Repair - E90/E91
• Axle Shafts
• Basic Trouble Shooting
• Body Electrical
• Brakes
• Brakes - Repair - E90/E91
• Breakout Boxes & Connectors - Overview
• Cabin Air Filter
• Check Lists
• Clutch - Repair - E90/91
• Clutches Manual & Hydraulic
• Coding and Programming - Overview
• Cooling System (Mechanical)
• Diagnostic Connector Locations
• Door Locks & Anti-Theft Systems
• Driveline/axles
• Driveshaft & Universal Joints
• DTC Index
• Electronic Suspension
• Emission Applications
• Engine
• Engine - Repair - N52
• Engine Electrical System - Repair - E90/E91, Z4
• Engine Performance
• Exhaust
• Front Axle - Repair - E90/E91
• Fuel System
• Fuses & Circuit Breakers
• Gauges & Instrument Panels
• General Electrical System - Repair - E90/91
• Heating and Air Conditioning - Repair - E90/E91
• Horns
• Identification
• Manual & Power Steering
• Manual Trans
• Manual Transmission - Repair - E90/E91
• Manual Transmission - Special Tools - E90/E91
• Mechanical
• Mechanical - Hydraulic
• Metric Conversions
• Mode 6
• Oem General Information
• Passive Restraints
• Rear Axle - Repair - E90/E91
• Reset Procedures
• Specifications
• Steering
• Steering and Wheel Alignment - Repair - E90/E91
• Suspension Front
• Testing & Diagnostics
• Transmission
• Wheel & Tire System

Repair manual

Engine Electrical System - Repair - E90/E91, Z4 BMW 3 series E46 facelift

Step-by-step instructions on "Engine Electrical System - Repair - E90/E91, Z4" for BMW 3 series E46 facelift (2001–2006). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

30subsections

30articles

57illustrations

12 00 Contents of Engine Electrical System General

1 article

• 12 00 Contents of Engine Electrical System General

12 00 ... Instructions for disconnecting and connecting battery

1 article

• 12 00 ... Instructions for disconnecting and connecting battery

Vehicles with a two-battery system

1 article

• Vehicles with a two-battery system

12 00 ... Instructions for working on the ignition system

1 article

• 12 00 ... Instructions for working on the ignition system

12 00 ... Instructions for removing and installing electronic control units

1 article

• 12 00 ... Instructions for removing and installing electronic control units

12 00 ... Instructions for welding work (overload protection of control units)

1 article

• 12 00 ... Instructions for welding work (overload protection of control units)

12 00 ... Instructions on starting aid

1 article

• 12 00 ... Instructions on starting aid

12 13 Notes on checking ignition system

1 article

• 12 13 Notes on checking ignition system

FIRING ORDER

1 article

• FIRING ORDER 1

12 12 011 Replacing all spark plugs (N42, N40, N46, N45, N52, N52K, N51)

1 article

• 12 12 011 Replacing all spark plugs (N42, N40, N46, N45, N52, N52K, N51) 1

12 13 009 Checking rod-type ignition coils (M54, M56, N40, N42, N43, N45, N46, N52, N62, N62TU, N73)

1 article

• 12 13 009 Checking rod-type ignition coils (M54, M56, N40, N42, N43, N45, N46, N52, N62, N62TU, N73) 7

12 13 511 Replacing ignition coils (N52, N52K, N51)

1 article

• 12 13 511 Replacing ignition coils (N52, N52K, N51) 4

12 14 521 Replacing crankshaft pulse generator (N52, N52K, N51, N53)

1 article

• 12 14 521 Replacing crankshaft pulse generator (N52, N52K, N51, N53) 1

12 14 523 Replacing inlet camshaft pulse generator (N52, N52K, N51, N53)

1 article

• 12 14 523 Replacing inlet camshaft pulse generator (N52, N52K, N51, N53) 1

12 14 524 Replacing exhaust camshaft pulse generator (N52, N52K, N51, N53)

1 article

• 12 14 524 Replacing exhaust camshaft pulse generator (N52, N52K, N51, N53) 1

12 14 550 Replacing control unit (DME)

1 article

• 12 14 550 Replacing control unit (DME) 4

12 14 600 Removing/replacing knock sensors (N52, N52K, N51)

1 article

• 12 14 600 Removing/replacing knock sensors (N52, N52K, N51) 3

12 14 700 Coding control module (DME / DDE)

1 article

• 12 14 700 Coding control module (DME / DDE)

12 14 705 Programming control unit (DME / DDE)

1 article

• 12 14 705 Programming control unit (DME / DDE)

12 90 ... Removing and installing/replacing electronics box

1 article

• 12 90 ... Removing and installing/replacing electronics box 10

12 90 100 Replacing fan for electronics box

1 article

• 12 90 100 Replacing fan for electronics box 2

61 14 ... Removing and installing/replacing engine compartment B+ terminal

1 article

• 61 14 ... Removing and installing/replacing engine compartment B+ terminal 3

12 31 ... Replacing alternator belt pulley

1 article

• 12 31 ... Replacing alternator belt pulley 1

12 31 009 Checking alternator (BSD)

1 article

• 12 31 009 Checking alternator (BSD) 7

12 31 020 Removing and installing or replacing alternator (N52, N52K, N51, N53)

1 article

• 12 31 020 Removing and installing or replacing alternator (N52, N52K, N51, N53) 1

12 41 020 Removing and installing/replacing starter motor (N52, N52K, N51, N53)

1 article

• 12 41 020 Removing and installing/replacing starter motor (N52, N52K, N51, N53) 2

12 41 041 Replacing solenoid switch

1 article

• 12 41 041 Replacing solenoid switch 3

12 42 500 Replacing battery positive lead (between starter, alternator and battery positive terminal)

1 article

• 12 42 500 Replacing battery positive lead (between starter, alternator and battery positive terminal) 2

12 61 280 Removing and installing/replacing oil pressure sensor (N52, N52K, N51, N54, N53)

1 article

• 12 61 280 Removing and installing/replacing oil pressure sensor (N52, N52K, N51, N54, N53) 1

12 61 285 Replacing engine oil level sensor (N52, N52K, N51, N46, N54, N53)

1 article

• 12 61 285 Replacing engine oil level sensor (N52, N52K, N51, N46, N54, N53) 2