Fuses and relays Volkswagen Passat B7 (3C, 3G), 2010–2015

VW Passat B7 represents the seventh generation of the Passat series. However, it is not an entirely new model, but rather a major facelift of the previous B6 generation, sharing a nearly identical interior design. Produced from 2010 through 2015. This article provides a comprehensive guide to the fuse and relay locations, fuse box diagrams, and circuit assignments for the Volkswagen Passat B7 (chassis codes 3C, 3G; PQ46 platform), complete with location photos and schematics. The fuse for the “Cigarette lighter” is highlighted in bold. Electronic control unit (ECU) locations are also included.

Note: Fuse and relay assignments, as well as amperage ratings, may vary depending on vehicle equipment level, trim package, and production year.

General Component Locations

Component Overview

1. Passenger-side instrument panel fuse box
2. Engine compartment fuse box (adjacent to battery)
3. Luggage compartment fuse box (behind left side trim)
4. Driver-side instrument panel fuse box
5. Under-dash relay carriers
6. Engine compartment relay box
7. High-power main fuse box (E-Box)

In the Passenger Compartment

Driver-Side Fuse Box

Located at the left edge of the instrument panel, behind the removable side cover.

Diagram
№	Rating & Description
1	10A – Rear window roller blind control unit, High-pressure sensor, Air quality sensor, Oil level/temperature sensor, Fresh air blower relay
2	5A – ASR/ESP button, AUTO HOLD button, ABS control unit, Electromechanical parking brake control unit
3	10A – Main power supply relay, Crankcase ventilation heater element, Natural gas high-pressure shut-off valve
4	10A – Electronic damping control unit, Diagnostic connector (OBD-II), Start-Stop button, Adaptive Cruise Control (ACC) unit, Park Distance Control (PDC) unit, Trailer detection control unit, Park Assist control unit, Front camera for driver assistance systems
5	10A – Switch and instrument cluster illumination dimmer, Headlight range control, Left headlight control unit
6	10A – All-wheel drive (AWD) control unit (Haldex)
7	5A – Instrument cluster control unit, Data bus diagnostic interface (Gateway)
8	10A – Right headlight control unit, Right headlight range control motor
9	10A – Airbag control unit, Seat occupied recognition control unit, Passenger airbag deactivation indicator lamp
10	10A – Tiptronic switch, Mass air flow (MAF) sensor, Fuel pump fuse VW Passat B7, Motronic power supply relay, Engine Control Module (ECM), Starter relay
11	5A – Emergency data recorder switch, Interior mirror with taximeter display, Tachograph
12	10A – Driver door control unit, Front passenger door control unit, Convenience system central control unit
13	10A – Light switch, Diagnostic connector (OBD-II), Automatic transmission selector lever, ABS control unit
14	10A – Alarm system siren
15	10A – Rain and light sensor, Heated rear window relay, Heated windshield relay, Climatronic control unit, A/C control unit, Rearview camera control unit, Terminal 15 / engine start control unit
16	10A – Electronic ignition lock, Electronic steering column lock control unit, Terminal 15 / engine start control unit
17	15A – Driver door control unit, Rear left door control unit
18	3A – Body Control Module (BCM), Voltage stabilizer, Engine Control Module (ECM), Power supply relay 2
19	7.5A – Adaptive Cruise Control (ACC) unit, Park Distance Control (PDC) unit, Lane Departure Warning control unit, Park Assist control unit
20	5A – Garage door opener operating unit (HomeLink)
21	10A – Rear window roller blind control unit
22	20A – Electromechanical parking brake control unit
23	15A – Trailer detection control unit
24	20A – Electromechanical parking brake control unit
25	20A – Trailer detection control unit
26	20A – Body Control Module (BCM)
27	15A / 20A – Fuel pump relay
28	30A – Rear door control unit, Convenience system central control unit
29	20A – Rear heated seat control unit
30	20A – Sliding/tilting sunroof control unit
31	30A – 12 V to 230 V power inverter socket
32	30A – Body Control Module (heated rear window)
33	30A – Headlight washer system relay, Headlight washer pump
34	25A – Front heated seat control unit
35	15A – Luggage compartment lid control unit, Driver seat lumbar support adjustment switch
36	15A – Lumbar support adjustment switch, Seat cushion angle adjustment switch, Seat backrest adjustment switch, Trailer socket power relay
37	20A / 30A – Trailer detection control unit, Luggage compartment lid control unit 2
38	40A – Fresh air blower relay, Fresh air blower control unit, Climatronic
39	5A / 15A – Multifunction switch (6-speed automatic transmission only), Transmission control unit (TCU), Reversing light switch, Direct-Shift Gearbox (DSG) mechatronic unit
40	20A – Auxiliary battery charging relay, Windshield washer pump, Rear window wiper motor
41	20A – Cigarette lighter socket
42	15A – 12 V power socket
43	20A – Auxiliary heater control unit (vehicles with secondary battery only)
44	30A – Driver and front passenger door control units
45	20А – Auxiliary heater mode relay (vehicles with secondary battery only)
46	Unassigned
47	10A – Mobile phone transceiver unit (vehicles with Start-Stop system only)
48	5A – Instrument cluster control unit (vehicles with Start-Stop system only)
49	Unassigned

Note: Fuse #41 (20 A) powers the cigarette lighter socket. Fuse #33 (30 A) protects the headlight washer system circuit.

Passenger-Side Fuse Box

Located at the right edge of the dashboard, behind a removable side cover similar to the driver side.

Diagram
№	Rating & Description
1	15A / 30A – Luggage compartment lid control unit, Trailer detection control unit
2	15A / 30A – Luggage compartment lid control unit 2, Trailer detection control unit
3	10A / 30A – Sunroof blind control unit, Trailer detection control unit
4	15A – Electronic damping control unit (DCC)
5	Unassigned
6	Unassigned
7	Unassigned
8	Unassigned
9	Unassigned
10	Unassigned
11	Unassigned
12	Unassigned
13	Special-purpose vehicles / Fleet equipment
14	Special-purpose vehicles / Fleet equipment
15	Special-purpose vehicles / Fleet equipment
16	Portable radio / flashlight charging socket
17	Special-purpose vehicles / Fleet equipment
18	Special-purpose vehicles / Fleet equipment
19	Special-purpose vehicles / Fleet equipment
20	Special-purpose vehicles / Fleet equipment
21	Special-purpose vehicles / Fleet equipment
22	Special-purpose vehicles / Fleet equipment
23	Special-purpose vehicles / Fleet equipment
24	Special-purpose vehicles / Fleet equipment

Under-Dash Relay Carriers

Located under the instrument panel on the driver side, behind the lower trim panel.

Relay carrier location overview.

Diagram
Upper Relay Carrier
1	Fresh air blower relay (Climatic with auxiliary heater)
2	Auxiliary heater operation relay (Climatic with auxiliary heater)
3	Auxiliary heater operation relay (Diesel engine with auxiliary heater)
4	Unassigned
5	After-run coolant pump relay (1.8L / 2.0L TFSI only), Power supply relay
6	Terminal 50 power supply relay (vehicles without Start-Stop system)
7	Power supply relay 2 (vehicles without Start-Stop system)
8	Power supply relay 2 (vehicles without Start-Stop system)
A & B – Driver seat adjustment circuit breaker / thermal fuse
Lower Relay Carrier
1	Heated rear window relay (645)
2	Terminal 15 power supply relay (645)
3	Dual-tone horn relay (646), Headlight washer relay (646)
4	Trailer power supply relay (from May 2012 production)
5	Load reduction relay, Terminal X (644)

Note: Additional individual relays (such as the auxiliary battery charging relay) may be mounted separately depending on vehicle options.

In the Engine Compartment

Located on the left side of the engine compartment beneath a protective cover. The assembly consists of two main sections: the distribution box (E-Box) and the high-power fuse strip. A relay expansion module is also mounted nearby.

Engine Compartment Fuse Box (E-Box)

Type 1 Box

Access overview.

Diagram
№	Rating & Description
1	15A – Direct-Shift Gearbox (DSG) mechatronic unit
2	30A – ABS control unit
3	20A – Horn, Body Control Module (BCM)
4	20A – Trailer detection control unit
5	5A – Battery monitoring control unit, Body Control Module (BCM)
6	5A – Automatic transmission control unit / 15A – DSG mechatronic unit
7	15A – Infotainment/navigation display control unit, Head unit / 30A – Voltage stabilizer
8	30A – Direct-Shift Gearbox (DSG) mechatronic unit
9	5A – Steering column electronics control unit
10	20A – Fuel pump relay (diesel engines), Glow plug control unit, Ignition coils with power output stages (cylinders 1–4)
11	5A – Instrument cluster control unit (vehicles with Start-Stop system only)
12	5A – Mobile phone control unit, Antenna amplifier, TV tuner, Satellite radio tuner
13	10A – Motronic power supply relay, Terminal 30 power relay, Engine Control Module (ECM)
14	25A / 30A – Engine Control Module (ECM)
15	5A / 10A – Data bus diagnostic interface (Gateway)
16	15A – After-run coolant pump relay / 10A – EGR valve, Boost pressure control solenoid valve, Heated oxygen sensor (Lambda sensor)
17	40A – Low-heat output relay, Coolant circulation pump, Natural gas cylinder shut-off valve
18	10A / 15A / 30A – Fuel quality sensor, High-pressure natural gas valve
19	30A – Audio system amplifier
20	5A – Auxiliary fuel pump relay, Radiator fan control unit, Glow plug control unit / 10A – Clutch pedal position sensor, Camshaft timing control valve 1 / 15A – Fuel pressure regulator
21	20A – Auxiliary heater control unit
22	30A – Windshield wiper motor control unit
23	5A – Compass magnetic field sensor, Glow plug control unit / 10A – Map-controlled engine cooling thermostat, Radiator fan control unit, Intake manifold flap motor, Oxygen sensor heater, Variable valve timing solenoid
24	10A / 15A – NOx sensor control unit, Oxygen sensor heater
25	40A – Body Control Module (BCM): Low beam, High beam, Side marker lights
26	40A – Body Control Module (BCM): Low beam, High beam, Side marker lights
27	60A – Heated windshield element
28	40A / 50A – Secondary air injection pump motor, Glow plug control unit
29	50A – Body Control Module (BCM), Load reduction relay (Terminal X)
30	50A – Body Control Module (BCM power supply)

Type 2 Box

Overview.

Diagram
№	Rating & Description
1	5A / 15A – Automatic transmission control unit, DSG mechatronic unit
2	30A – ABS control unit
3	20A – Convenience system central control unit, Trailer detection control unit
4	5A – Body Control Module (BCM)
5	20A – Alarm horn / buzzer
6	20A – Ignition coils with integrated output stages
7	15A – Fuel pressure regulator / 5A – Clutch pedal position sensor
8	10A – Radiator fan control unit, Camshaft timing valve, Suction jet pump valve, Intake manifold flap valve
9	5A – Coolant circulation pump relay
10	10A – Motronic power supply relay 2, Oxygen sensor heater
11	25A / 30A – Engine Control Module (ECM)
12	Unassigned
13	Unassigned
14	Unassigned
15	10A – Coolant circulation pump
16	5A – Steering column electronics control unit
17	5A – Instrument cluster control unit
18	30A – Audio amplifier, Special-purpose vehicle control module
19	15A / 20A – Head unit, Navigation display control unit
20	20A – Mobile phone module, TV tuner, Satellite radio tuner
21	10A – TV tuner, Digital satellite radio tuner
22	7.5A – Multimedia control unit (MDI)
23	10A – Radiator fan control unit / 5A – Compass sensor
24	5A / 10A – Data bus diagnostic interface (Gateway)
25	Unassigned
26	10A – Engine Control Module (ECM), Motronic power supply relay
27	Unassigned
28	Unassigned
29	Unassigned
30	20A – Auxiliary heater control unit
31	30A – Windshield wiper motor control unit
32	10A – Boost pressure control solenoid valve
33	15A – Fuel pressure regulator, Oxygen sensor heater
34	Unassigned
35	20A – Auxiliary heater relay
36	Unassigned
37	Unassigned
38	Unassigned
39	Unassigned
40	Unassigned
41	Unassigned
42	Unassigned
43	Unassigned
44	10A – Evaporative emission (EVAP) leak detection pump
45	10A – Oxygen sensor (Lambda sensor)
46	10A – Downstream oxygen sensor heater (Post-cat Lambda probe 1)
47	40A – Body Control Module (BCM): Low beam, Side marker lights
48	40A – Body Control Module (BCM): Low beam, Side marker lights
49	Body Control Module (BCM power supply)
50	Unassigned
51	60A – High-heat output relay
52	60A – Heated windshield element
53	50A – Body Control Module (BCM), Left fuse box
54	50A – Secondary air injection pump motor, Glow plug relay
A1 – Natural gas shut-off valve relay
A2 – After-run coolant pump relay
A3 – Reserved
A4 – Main power supply relay

High-Power Main Fuse Box

Contains high-current fusible links for primary power distribution.

Diagram
Type 1
1	150A / 180A – Alternator
2	80A – Electromechanical power steering motor
3	50A / 80A – Radiator fan control unit
4	80A / 100A – Driver seat adjustment thermal fuse 1, Instrument panel fuse boxes
5	80A – Right instrument panel fuse box (through 04/2008), Driver seat adjustment thermal fuse 1
6	80A / 100A – Left / Right instrument panel fuse boxes
7	40A – ABS control unit
Type 2
1	150A – Alternator
2	80A – Electromechanical power steering motor
3	50A / 80A – Radiator fan control unit
4	60A – Seat adjustment thermal fuse 1, Instrument panel fuse boxes
5	60A / 80A – Seat adjustment thermal fuse 1, Instrument panel fuse boxes
6	80A / 100A – Left / Right instrument panel fuse boxes
7	60A – Auxiliary battery charge line / 100A – Auxiliary air heater element, High-heat output relay
8	40A – ABS control unit

Engine Compartment Relay Carrier

(Location #6 in general layout diagram)

Diagram
№	Description
1	Starter relay 1 (643) – Vehicles with Start-Stop system only
2	Glow plug control unit (457)
3	Unassigned
4	Low-heat output relay (53)
5	High-heat output relay (100)
6	Starter relay 2 (489) – Vehicles with Start-Stop system only

Note: A separate heated windshield relay may also be located in the plenum chamber adjacent to the Engine Control Module (ECM).

In the Luggage Compartment

Models equipped with a trunk-mounted auxiliary or primary battery feature an additional auxiliary fuse and relay panel in the luggage compartment.

• SF1 – 30A: Instrument panel fuse boxes (left / right)
• SF2 – 80A: Distribution box fuse carrier
• SF3 – 125A: Switching module main power supply
• SF4 – 5A: Body Control Module (BCM)

Located in the left side of the luggage compartment behind the interior side trim, additional high-amp relays may be present: 70 A (Sedan / Saloon) or 60 A (Variant / Estate).