The BMW 6-Series (E63, E64) from 2004 to 2010 represents a pinnacle of luxury, performance, and style in the automotive world. This grand touring coupe and convertible duo boasts a striking design, a refined interior, and a range of powerful engines. Alongside its impressive mechanical prowess, the BMW 6-Series also incorporates various electrical components that contribute to its advanced features and smooth operation. Understanding the key electrical components, such as the fuse box and relay system, is vital for maintaining the optimum functionality of this remarkable vehicle.
Fuse Box and Relay System
One of the critical electrical components in the BMW 6-Series (E63, E64) is the fuse box and relay system. Located within the engine bay or interior cabin, the fuse box houses a collection of fuses that protect individual circuits in the car’s electrical system. Fuses act as safety devices that prevent excessive current flow, safeguarding the vehicle from electrical damage or fires.
The fuse box is divided into separate sections, each dedicated to a specific set of functions or components. These may include the vehicle’s lighting system, climate control, audio system, and various other electrical accessories. Each fuse is labeled according to its corresponding circuit, allowing for quick identification and replacement if necessary.
The relay system, closely associated with the fuse box, is responsible for controlling the flow of electricity to different components or subsystems in the BMW 6-Series. Relays act as switches that respond to electrical signals, directing power to specific areas as needed. By functioning as intermediaries between the electrical system and various components, relays help ensure efficient operation and protection against potential damage caused by power surges.
The BMW 6-Series (E63, E64) employs a range of relays to manage critical functions such as fuel pump operation, engine cooling fan activation, and power window control. These relays are typically located in the fuse box or in specific relay panels within the vehicle.
(2004-2010) BMW 6-Series (E63, E64) fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
BMW 6-Series (E63, E64) 2004-2010 fuse assignment
Fuse box on the dashboard
- K6 – Relay, headlight washer, K93 – Relay, electronic damper control (as of 09.2005)
- K96 – Fuel pump relay (M54 or N62), K9 – Power-saving relay, terminal 15 (as of 09.2005)
- A41a – Fuse box
| No. | Amps | Assignment/Designation |
| 1 | 50A | Dynamic stability control (DSC) |
| 2 | 60A | Petrol: Secondary air pump relay Diesel: Fuel heater |
| 3 | 40A | Blower output stage |
| 4 | 40A | up to 09.2005: Active steering |
| 20A | as of 09.2005: Power-saving relay, electronic damper control | |
| 5 | 50A | Light module |
| 6 | 50A | Light module |
| 7 | 50A | Car access system |
| 30A | Ignition / starter electronic | |
| 8 | 60A | N62: Integrated supply module (IVM) N62 with SMG: Fuse carrier, engine electronics (F01: Hydraulic pump relay, SMG) S85: B+ potential distributor DME relay Fuse carrier, engine electronics (F01) N52: B+ potential distributor DME control unit DME relay Fuse carrier, engine electronics: F05: Relay, fuel injectors F07: VVT relay F08: Hydraulic pump relay, SMG F010: Engine breather heating relay |
| 9 | 60A | Electric fan |
| 10 | 30A | up to 09.2005: Driver’s door module as of 09.2005: Body-gateway module (LHD: window lift, driver’s side; RHD: window lift, passenger’s side) |
| 11 | 5A | Basic body module (central locking system, window lift, windscreen wiper relay) |
| 12 | 30A | up to 09.2005: Passenger’s door module as of 09.2005: Body-gateway module (LHD: window lift, passenger’s side; RHD: window lift, driver’s side) |
| 13 | 7.5A | up to 09.2005: Instrument cluster control unit |
| 30A | VTG transfer case; as of 09.2005: Control unit, transfer box | |
| 15A | S85; as of 09.2005: Sequential manual transmission (SMG) | |
| 14 | 30A | Seat module, front right (not semi-electric basic seat) Switch, passenger’s seat adjustment (RHD; semi-electric basic seat) Passenger’s lumbar support switch (RHD; semi-electric basic seat) Switch, driver’s seat adjustment (LHD; semi-electric basic seat) Driver’s lumbar support switch (LHD; semi-electric basic seat) |
| 15 | 5A | Car access system |
| 16 | 30A | Windscreen wiper relay |
| 17 | 15A | S85; up to 09.2005: Sequential manual transmission (SMG) |
| 5A | as of 09.2005: Steering column switch cluster | |
| 18 | 30A | up to 09.2005: Relay, headlight washer as of 09.2005: Body-gateway module |
| 19 | 5A | USA: Gear indicator lighting S85: EDC Electronic damper control |
| 20 | 20A | SHZH independent/auxiliary heater: Heater Independent auxiliary heater EDC Damper Control: Power-saving relay, electronic damper control |
| 21 | 30A | Seat module, front right (not semi-electric basic seat) Switch, driver’s seat adjustment (RHD; semi-electric basic seat) Driver’s lumbar support switch (RHD; semi-electric basic seat) Switch, passenger’s seat adjustment (LHD; semi-electric basic seat) Passenger’s lumbar support switch (LHD; semi-electric basic seat) |
| 22 | 30A | Basic body module (LHD: window lift rear, driver’s side; RHD: window lift rear, passenger’s side) |
| 23 | 30A | S85; as of 09.2005: Relay, electric vacuum pump |
| 24 | 30A | Basic body module (LHD: window lift rear, passenger’s side; RHD: window lift rear, driver’s side) |
| 25 | 30A | Dynamic stability control (DSC) |
| 26 | 7.5A | IHKA Basic: Heating/air conditioning system |
| 20A | as of 09.2005: Power-saving relay, terminal 15 | |
| 27 | 30A | Basic body module (central locking system) |
| 28 | 20A | Steering column switch cluster |
| 29 | 10A | OBDII socket Airbag |
| 30 | 15A | IHKA High: Heating/air conditioning system |
| 20A | Fuel pump output stage Fuel pump relay | |
| 31 | 30A | LHD: Seat module, front left (heated, active backrest-width adjustment, active seat) RHD: Seat module, front right (heated, active backrest-width adjustment, active seat) |
| 32 | 10A | up to 09.2005: Dynamic drive S85; up to 09.2005: Relay, electric vacuum pump as of 09.2005: Switch block, driver’s door Electrochromic outside mirror, driver’s side Electrochromic outside mirror, passenger’s side |
| 33 | 30A | Centre console switch center LHD:Â Seat module, front right (heated, active backrest-width adjustment, active seat) RHD:Â Seat module, front left (heated, active backrest-width adjustment, active seat) |
| 34 | 30A | up to 09.2005: CCC/M-ASK |
| 20A | as of 09.2005: CCC/M-ASK | |
| 35 | 5A | Navigation system |
| 36 | 7.5A | Comfort access control unit Outer door handle electronic module, driver’s side Outer door handle electronic module, passenger’s side Electronic outer door handle module, rear left Electronic outer door handle module, rear right |
| 37 | 10A | up to 09.2005: TCU (telematics control unit) ULF (universal charging & hands-free unit) Eject box |
| 5A | 09.2005-03.2007: TCU (telematics control unit) ULF (universal charging & hands-free unit) Eject box as of 03.2007: ULF-SBX interface box TCU (telematics control unit) ULF-SBX-H interface box High USB hub Eject box | |
| 38 | 10A | up to 09.2005: CD changer |
| 5A | as of 09.2005: CD changer | |
| 39 | – | Not used |
| 40 | 10A | DVD changer |
| 41 | 5A | as of 09.2005: Instrument cluster control unit |
| 42 | 15A | S85: Sequential manual transmission (SMG) |
| 43 | – | Not used |
| 44 | – | Not used |
| 45 | – | Not used |
| 46 | – | Not used |
Fuse box in the rear
up to 09.2005
as of 09.2009
| No. | Amps | Assignment/Designation |
| 50 | 20A | M54, N62: Fuel pump relay N52, diesel: Fuel pump control (EKPS) S85: Fuel pump output stage |
| 30A | as of 09.2005: Headlight washer pump | |
| 51 | 5A | Siren and tilt alarm sensor Electrochromic interior rearview mirror Microwave sensor, driver’s door Microwave sensor, passenger’s door Microwave sensor, rear left Microwave sensor, rear right |
| 52 | 10A | Micro-power module |
| 40A | E64: Relay, convertible top 1 Relay, convertible top 2 | |
| 53 | 7.5A | up to 09.2005: Automatic soft-close drive, boot lid/tailgate 09.2004-09.2005: Comfort access control unit Outer door handle electronic module, driver’s side Outer door handle electronic module, passenger’s side Electronic outer door handle module, rear left Electronic outer door handle module, rear right |
| 30A | as of 09.2005: Active backrest width adjustment, passenger Active backrest width adjustment, driver | |
| 54 | 20A | up to 09.2005: Power-saving relay, terminal 15 |
| 40A | as of 09.2005: Rear window defogger | |
| 55 | 5A | up to 09.2005: Rain/headlight sensor |
| 40A | as of 09.2005: Boot lid lift | |
| 56 | 5A | as of 09.2005: Rain/headlight sensor |
| 57 | 20A | up to 09.2005: Micro-power module |
| 5A | IHKA Basic; as of 09.2005: Heating/air conditioning system | |
| 58 | 40A | up to 09.2005: Rear window defogger |
| 20A | as of 09.2005: Rear wiper relay | |
| 59 | 5A | Aerial tuner with a remote control receiver |
| 60 | 5A | as of 09.2005: Rollover protection controller |
| 61 | 20A | up to 09.2005: Front cigar lighter Charging socket, glovebox |
| 7.5A | as of 09.2005: Cooler box | |
| 62 | 5A | up to 09.2005: Power-saving relay, terminal 15 |
| 30A | as of 09.2005:    E64:      Relay for lowering the rear window    Relay for raising the rear window | |
| 63 | 5A | up to 09.2005:   Electrochromic interior rearview mirror   Park distance control (PDC) |
| 20A | as of 09.2005: Independent auxiliary heater | |
| 64 | 10A | up to 09.2005: Rear compartment display Central information display Controller |
| 15A | IHKA High; as of 09.2005: Heating/air conditioning system | |
| 65 | 10A | up to 09.2005: Headset connection module Head-up display |
| 66 | 5A | up to 09.2005: Dynamic stability control (DSC) VTG Transfer case: Dynamic stability control (DSC) Control unit, transfer box |
| 20A | E63: Panorama glass roof E64: Convertible top module | |
| 67 | 10A | up to 03.2006: Video module Satellite receiver |
| 20A | as of 03.2006: Automatic soft-close drive, passenger’s door (LHD) Automatic soft-close drive, driver’s door (RHD) Automatic soft-close drive, rear right | |
| 68 | 5A | up to 03.2006:   Centre console switch center   Switch, driver’s seat adjustment   Switch, passenger’s seat adjustment |
| 20A | as of 03.2006: Automatic soft-close drive, driver’s door (LHD) Automatic soft-close drive, passenger’s door (RHD) Automatic soft-close drive, rear left | |
| 69 | 5A | Park distance control (PDC) |
| 70 | 5A | up to 09.2005: Adaptive headlight |
| 10A | 09.2005-03.2007: Active cruise control as of 03.2007: Active cruise control Far-range sensor Close-range sensor, right Close-range sensor, left | |
| 71 | 20A | up to 09.2005: S85: Fuel pump output stage |
| 30A | as of 09.2005:Â Centre console switch center | |
| 72 | 40A | up to 09.2005: E64: Relay, convertible top 1 Relay, convertible top 2 |
| 20A | N62: Fuel pump relay Diesel: Fuel pump control (EKPS) | |
| 73 | 30A | up to 09.2005:    E63:      Relay for lowering a rear window      Relay for raising the rear window      Trailer module 09.2005-03.2007:   Hifi amplifier |
| 40A | as of 03.2007: Hifi amplifier | |
| 74 | 20A | up to 09.2005: Trailer socket |
| 10A | as of 09.2005:   Centre console switch center   Switch, driver’s seat adjustment   Switch, passenger’s seat adjustment | |
| 75 | 30A | up to 09.2005:Â Control unit, transfer box |
| 10A | as of 09.2005: Satellite receiver Digital tuner Video module | |
| 76 | 40A | up to 09.2005: Boot lid lift |
| 10A | as of 09.2005: Dynamic drive | |
| 77 | 5A | up to 09.2005: Aerial tuner with remote control receive |
| 10A | as of 09.2005: Head-up display Headset connection module | |
| 78 | 5A | as of 09.2005: Dynamic stability control (DSC) Control unit, transfer box |
| 79 | 7.5A | up to 09.2005: Electronic ride height control |
| 10A | as of 09.2005: Central information display Controller | |
| 80 | 30A | up to 09.2005: HiFi amplifier |
| 10A | as of 09.2005: Selector lever Gear indicator lighting Eject box TCU (telematics control unit) Compensator (mobile phone) Fan, spare wheel well Electronic night vision module | |
| 81 | 7.5A | as of 09.2005: Electronic ride height control |
| 82 | 20A | up to 09.2005: Luggage compartment socket outlet Rear cigarette lighter Socket outlet, rear |
| 7.5A | as of 09.2005: Tyre pressure control (RDC) | |
| 83 | 20A | up to 09.2005: E63: Panorama glass roof E64: Convertible top module |
| 30A | as of 09.2005: Active backrest width adjustment, driver (LHD) Active backrest width adjustment, passenger (RHD) | |
| 84 | 10A | up to 09.2005: Active cruise control |
| 15A | as of 09.2005:   Transmission Control   Sequential manual transmission (SMG) | |
| 85 | 7.5A | as of 09.2005: Sequential manual transmission (SMG) |
| 86 | 15A | up to 09.2005:   Transmission Control   Sequential manual transmission (SMG) |
| 40A | as of 09.2005:Â Active Steering | |
| 87 | 20A | as of 09.2005: Front cigar lighter Charging socket, glovebox |
| 88 | 30A | up to 09.2005:Â Centre console switch center |
| 20A | as of 09.2005: Luggage compartment socket outlet Rear cigarette lighter Socket outlet, rear | |
| 89 | 10A | up to 09.2005: Fan, MMC Gear indicator lighting Selector lever Gear indicator lighting Fan, spare wheel well TCU (telematics control unit) ULF (universal charging & hands-free unit) Eject box |
| 5A | as of 09.2005:   Electrochromic interior rearview mirror   Power-saving relay, terminal 15 |
| No. | Amps | Assignment/Designation |
| 90 | 200A | Fuse holder, front (fuse 1-33) |
| 91 | 100A | Diesel: DDE main relay N62, TU: Integrated supply module (IVM) VVT relay 1 VVT relay 2 Variable valve timing gear control unit |
| 92 | 100A | Electric auxiliary heater |
| Relay | ||
| I01061 | Rear defogger | |
| I01068 | Terminal 30G | |
| I01069 | Terminal 15 | |
Fuse in the engine compartment
M54
- K6300 – DME relay
- K6327 – Relay, fuel injectors
Diesel engine
S85
N52
- K6319 – VVT relay
- K6539 – Engine breather heating relay
| No. | Amps | Assignment/Designation |
| F01 | 30A | N62: Hydraulic pump relay, SMG N52: Interference suppression capacitor for ignition coils Ignition coil (1, 2, 3, 4, 5, 6) |
| 20A | M57, TU: Hall-effect sensor, camshaft 1 Hot-film air mass meter Rail pressure control valve Volume control valve Solenoid valve, boost pressure control Heating, crankcase breather S85: Power-saving relay, terminal 15 Fuel injector (1, 2, 3, 4, 5, 6, 7, 8, 9, 10) M57 TUTOP: Hall-effect sensor, camshaft 1 Hot-film air mass meter Rail pressure control valve Throttle valve Turbine control valve Volume control valve Solenoid valve, boost pressure control Heating, crankcase breather | |
| F02 | 20A | Diesel:   Solenoid, radiator shutter   E-box fan   Exhaust flap   Brake air flap sensor left   Brake air flap sensor, right   AUC sensor S85: Ionic current control unit |
| 30A | N52: Electric coolant pump Thermostat, characteristic map cooling Intake camshaft sensor Exhaust camshaft sensor VANOS solenoid valve, intake VANOS solenoid valve, exhaust | |
| F03 | 30A | Diesel: Digital diesel electronics control unit S85: DME control unit |
| 20A | N52: DME control unit Oil condition sensor DISA actuator 1 DISA actuator 2 Fuel tank vent valve Crankshaft sensor Hot-film air mass meter | |
| F04 | 10A | Diesel:   Solenoid, radiator shutter   E-box fan   Exhaust flap   Brake air flap sensor, left   Brake air flap sensor, right   AUC sensor S85: Ionic current control unit |
| 30A | N52:   Sequential manual transmission (SMG)   Oxygen sensor be-fore catalytic converter   Oxygen sensor 2 before catalytic converter   Oxygen sensor after the catalytic converter   Oxygen sensor 2 after the catalytic converter   Crankshaft breather heating 1 | |
| F05 | 30A | S85: Pressure accumulator valve VANOS Fuel tank vent valve 2 Intake camshaft sensor 2 Exhaust camshaft sensor 2 Air mass flow sensor 2 Idle actuator Air mass flow sensor Oil condition sensor Intake camshaft sensor Exhaust camshaft sensor Secondary air pump valve Charcoal filter valve |
| F06 | 10A | N52; up to 03.2007: Solenoid, radiator shutte Secondary air pump relay Exhaust flap E-box fan Diagnostic module for fuel tank leakage Secondary air-hot-film air-mass meter as of 03.2007: Solenoid, radiator shutte Secondary air pump relay Exhaust flap E-box fan AUC sensor Brake air flap sensor, left Brake air flap sensor, right Nitrogen oxide module Diagnostic module for fuel tank leakage Secondary air-hot-film air-mass meter |
| F07 | 40A | N52: VVT relay |
| F08 | 30A | N52: Hydraulic pump relay, SMG |
N62, TU
S85
| No. | Amps | Assignment/Designation |
| F001 | 30A | N62: DME control unit Variable valve timing gear control unit Fuel injector (5, 6, 7, 8) Sequential manual transmission (SMG) |
| 20A | S85: Idle actuator, cylinder bank 1 | |
| F002 | 20A | N62, TU: DME control unit Fuel tank vent valve Intake camshaft sensor 2 Exhaust camshaft sensor 2 VANOS solenoid valve 2, intake VANOS solenoid valve 2, exhaust S85: Idle actuator, cylinder bank 2 |
| F003 | 20A | N62: Ignition coil (1, 2, 3, 4) |
| 30A | S85: Electric throttle valve, bank 1 | |
| F004 | 20A | N62: Ignition coil (5, 6, 7, 8) |
| 10A | S85: Ionic current control unit 2 | |
| F005 | 30A | N62, TU: DME control unit Crankshaft sensor Hot-film air mass meter Intake camshaft sensor Exhaust camshaft sensor Characteristic map thermostat VANOS solenoid valve, intake VANOS solenoid valve, exhaust S85: Electric throttle valve, bank 2 |
| F006 | 20A | N62: DME control unit Fuel injector (1, 2, 3, 4) |
| F007 | 20A | N62: DME control unit Sequential manual transmission (SMG) |
| F008 | 30A | N62:   DME control unit   Oxygen sensor 2 after the catalytic converter   Oxygen sensor before the catalytic converter   Oxygen sensor 2 before the catalytic converter   Oxygen sensor after the catalytic converter   Oil quality sensor |
| F009 | 10A | up to 03.2007: Fuel pump relay Exhaust flap Solenoid, radiator shutter E-box fan Diagnostic module for fuel tank leakage Secondary air pump relay as of 03.2007: Fuel pump relay Exhaust flap Solenoid, radiator shutter E-box fan Diagnostic module for fuel tank leakage Secondary air pump relay Brake air flap sensor, left Brake air flap sensor, right AUC sensor |
| F010 | 40A | N62, TU: Variable valve timing gear control unit |
| 5A | N52:Â Engine breather heating relay | |
| F011 | 40A | N62, TU: Variable valve timing gear control unit |
| No. | Amps | Assignment/Designation |
| F1a | 10A | S85: Solenoid, radiator shutter E-box fan Gear indicator lighting Selector lever Shift lock selector lever lock Power-saving relay, electronic damper control Bonnet switch, right Bonnet switch, left Rpm sensor, transmission main shaft Relay, electric vacuum pump Diagnostic module for fuel tank leakage Secondary air-hot-film air-mass meter Secondary air pump relay |
Windscreen Wiper Relay (K11), Secondary Air Pump Relay (K6304a)
Relay, electric vacuum pump (K213)
DDE main relay (K2003a)
M57 TU
M57, M57 TUTOP, M47 TU2
DDE relay (K6300)
S85
N52
Hydraulic pump relay, SMG (K6318)
N62
S85
In conclusion, the BMW 6-Series (E63, E64) from 2004 to 2010 is a remarkable luxury vehicle that seamlessly combines performance, elegance, and advanced electrical systems. The fuse box and relay system play pivotal roles in ensuring the smooth operation and protection of the car’s electrical components. With their help, the BMW 6-Series delivers a driving experience that is not only luxurious but also safe and reliable.
By understanding the significance of the fuse box and relay system in the BMW 6-Series (E63, E64), owners can effectively maintain and troubleshoot electrical issues that may arise. Regular inspection, proper maintenance, and timely replacement of fuses or relays, if needed, will help keep the vehicle’s electrical system functioning optimally, allowing drivers to fully enjoy the exceptional driving dynamics and cutting-edge features of this remarkable luxury powerhouse.
