Fuses and relays Volkswagen Tiguan 2 (AD / BW), 2016–2021

The second-generation Volkswagen Tiguan (Mk2) was produced from 2016 through present model years with both petrol and diesel engines. This article provides fuse and relay box diagrams, location layouts, and circuit assignment tables for the 2nd-generation VW Tiguan (Chassis codes AD / BW; MQB platform). The fuse allocated to the cigarette lighter / 12V power sockets is highlighted in bold.

Note: Fuse and relay allocations may vary depending on the vehicle's production year, equipment package, trim level, and regional specification.

Passenger Compartment Fuse Box

The fuse box is located under the dashboard on the driver's side, behind a protective trim cover.

Location example.

Diagram
No.	Rating / Circuit Description
1	30 A - SCR reducing agent heater control unit J891
2	10 A - Steering column electronics control unit J527 6)
3	Spare
4	Spare
5	7.5 A - Data bus diagnostic interface J533
6	7.5 A - Gear selector lever E313
7	10 A - Heater / air conditioning control unit EX21 Heater control unit J65 Climatronic control unit J255 Air conditioning control unit J301 Rear air conditioning control and display unit E265 Auxiliary water heater radio receiver R149 Heated rear window relay J9 Tyre pressure monitoring control unit J502
8	7.5 A - Rotary light switch EX1 Electromechanical parking brake switch E538 Rain and light sensor G397 Diagnostic connector U31 (OBD-II) Driving mode selection switch E881 Interior monitoring sensor G578 Roof light module 1 / front interior light L235 Adaptive lighting and headlight range control unit J745 Roof light module 2 / background lighting L236
9	7.5 A - Steering column electronics control unit J527
10	7.5 A - Information display unit J685 Head-up display control unit J898
11	40 A - Onboard supply control unit J519 (BCM)
12	20 A - Information electronics control unit 1 J794 Navigation control unit J856
13	25 A - Front left seat belt tensioner control unit J854
14	40 A - Fresh air blower control unit J126
15	10 A - Electronic steering column lock control unit J764
16	7.5 A - TV tuner RX6 / Information electronics control unit 1 J794 Dual-band mobile phone amplifier J984 Storage compartment with mobile phone interface R265 Memory card reader D8 USB hub R293
17	7.5 A - Dash panel insert KX2 Instrument cluster control unit J285 Emergency call module and communication unit control unit J949
18	7.5 A - Area view camera control unit J928
19	7.5 A - Keyless entry and start authorization control unit J965
20	7.5 / 10 A - Reducing agent dosing system relay J963 Reducing agent dosing system supply module GX19
21	15 A - All-wheel drive control unit J492
22	15 A - Trailer detection control unit J345
23	20 A - Sliding sunroof control unit J245 Sunroof blind control unit J394
24	40 A - Onboard supply control unit J519 (BCM)
25	30 A - Driver / passenger door control unit J386 Rear left / right power window motor V26
26	30 A - Onboard supply control unit J519 (BCM)
27	30 A - Onboard supply control unit J519 (BCM)
28	25 A - Trailer detection control unit J345
29	Spare
30	Spare
31	40 A - Onboard supply control unit J519 (BCM)
32	7.5 / 10 A - Driver assistance systems front camera R242 Adaptive Cruise Control (ACC) control unit J428 Parking aid control unit J446 7) Lane change assist control unit J769 Lane change assist control unit 2 J770 Park assist steering control unit J791 7)
33	7.5 A - Airbag control unit J234 Front passenger airbag deactivated warning lamp K145
34	7.5 A - Rotary light switch EX1 Electrochromic interior rearview mirror EX5 12V socket relay J807 Reversing light switch F4 Refrigerant circuit pressure sensor G805 Air quality sensor G238 Electromechanical parking brake switch E538 Traction control (ASR) / Electronic Stability Control (ESC) switch E256
35	7.5 A - Diagnostic connector U31 (OBD-II) Headlight range control adjuster E102 Headlight range and instrument illumination control EX14 Left headlight range control motor V48 Right headlight range control motor V49 Left headlight MX1 / Right headlight MX2
36	7.5 / 10 A - Right headlight MX2
37	7.5 / 10 A - Left headlight MX1
38	25 A - Trailer detection control unit J345
39	30 A - Driver / passenger door control unit J386 Rear left / right power window motor V26
40	20 A - 12V Sockets / Cigarette Lighter
41	25 A - Front right seat belt tensioner control unit J855 Front left seat belt tensioner control unit J854
42	40 A - Onboard supply control unit J519 (BCM)
43	30 A - Digital sound package control unit J525
44	15 A - Trailer detection control unit J345
45	15 A - Driver seat adjustment control unit J810
46	30 A - 12 V to 230 V power inverter with socket U13
47	15 A - Rear window wiper motor V12
48	Spare
49	7.5 A - Clutch pedal position sensor G476 Starter relay 1 J906
50	40 A - Rear lid / Tailgate control unit J605
51	25 A - Rear air conditioning control and display unit E265
52	15 A - Electronic damping control unit J250 (DCC)
53	30 A - Heated rear window relay J9

Note: Fuse No. 40 (rated at 20 A) protects the 12V power sockets and cigarette lighter circuits.

Relay Assignments:

• R1 - Reducing agent dosing system relay J963
• R2 - Air conditioning magnetic clutch relay J44
• R3 - Spare
• R4 - Terminal 15 power supply relay J329
• R5 - Heated rear window relay J9
• R6 - Power socket relay J807

Located separately at the bottom of this fuse carrier are thermal fuse S46 (15 A) for front passenger seat adjustment and fuse S356 (7.5 A) for the USB charging socket.

Engine Compartment Fuse Box

Fuse and Relay Box

Located on the left side of the engine compartment next to the battery.

Location example.

Diagram
No.	Rating / Circuit Description
SB1	25 A - ABS control unit J104
SB2	40 / 60 A - ABS control unit J104
SB3	15 / 30 A - Engine control unit J623 (ECU)
SB4	5 / 10 A - Engine oil level and temperature sensor G266 Radiator fan control unit J293 Reducing agent dosing system relay J963 2) EVAP canister purge solenoid valve 1 N80 1) Piston cooling nozzle control valve N522 6) Turbocharger air recirculation valve N249 6) Intake manifold flap valve N316 6) Intake camshaft adjustment valve 1 N205 1) Exhaust camshaft adjustment valve 1 N318 1) Oil pressure control valve N428 1) Cylinder head coolant valve N489 1) High heat output relay J360 2) EGR cooler changeover valve N345 2) Low heat output relay J359 2) Boost pressure control solenoid valve N75 2)
SB5	10 A - Fuel pressure regulator valve N276 2) Fuel metering valve N290 2) Engine electronics power supply relay J757 Secondary air injection system GX24 6) Exhaust camshaft adjuster
SB6	5 A - Brake light switch F
SB7	7.5 / 10 / 15 A - Heater circulation pump V488 2), 6) Exhaust flap control unit J883 1), 4) Fuel metering valve N290 4), 7) Coolant circulation pump V55 7) Coolant shut-off valve N82 6) Gearbox coolant circuit valve N488 Coolant circulation pump V50 High-temperature coolant pump V467 Charge air cooling pump V188 Fuel pressure regulator valve N276 1) Oil pressure control valve N428 2) Cylinder head coolant valve N489
SB8	10 / 15 A - Oxygen sensor 1 before catalytic converter (Lambda probe) GX10 Oxygen sensor heater Z19 Oxygen sensor 1 after catalytic converter GX7 Oxygen sensor 1 heater after catalytic converter Z29 NOx sensor G295
SB9	5 / 10 / 20 A - Heater circulation pump V488 EVAP canister purge solenoid valve 1 N80 1) Intake camshaft adjustment valve 1 N205 Exhaust camshaft adjustment valve 1 N318 Mass air flow meter G70 2) Glow plug control unit J179 2) Ignition coils
SB10	15 / 20 A - Fuel pump control unit J538
SB11	40 A - Auxiliary air heater element Z35
SB12	40 A - Auxiliary air heater element Z35
SB13	15 A - DSG mechatronic unit J743
SB14	40 A - Heated windscreen relay J47
SB15	15 A - Horn relay J413
SB16	20 A - Engine electronics power supply relay J757
SB17	7.5 A - Main relay J271 1) Terminal 30 voltage supply relay J317 2) Engine control unit J623 ABS control unit J104 Heated windscreen relay J47
SB18	5 A - Battery monitoring control unit J367 Data bus diagnostic interface J533
SB19	30 A - Windscreen wiper motor V
SB20	10 A - Anti-theft alarm siren H12
SB21	30 A - Heated windscreen relay 2 J611
SB22	5 A - Engine control unit J623
SB23	30 A - Starter motor B
SB24	40 A - Auxiliary air heater element Z35
SB25	Spare
SB26	Spare
SB27	Spare
SB28	Spare
SB29	Spare
SB30	Spare
SB31	Spare
SB32	Spare
SB33	15 A - DSG mechatronic unit J743
SB34	Spare
SB35	30 A - Windscreen wiper motor V
SB36	Spare
SB37	20 A - Auxiliary heater control unit J364
SB38	Spare

Relay Assignments:

• R1 - Starter relay 1 J906
• R2 - Starter relay 2 J907
• R3 - Horn relay J413
• R4 - High heating output relay J360 (diesel models only)
• R4 - Secondary air injection pump relay J299 (2.0L TSI petrol models only)
• R5 - Main relay J271 (petrol models) / Terminal 30 power supply relay J317 (diesel models)
• R6 - Glow plug control unit J179 (diesel models only)
• R7 - Low heating output relay J359 (diesel models only)
• R8 - Engine electronics power supply relay J757 (2.0L TSI petrol models only)
• R9 - Heated windscreen relay J47 (models with heated windshield PR-4GX)
• R10 - Heated windscreen relay 2 J611

High-Power Pre-Fuse Box

Assignment:

• SA1 - 125 A Power supply for passenger compartment fuse box
• SA2 - 400 A Alternator with voltage regulator
• SA3 - 80 A Power steering control unit
• SA4 - 80 A Power supply for fuses
• SA5 - 50 A Radiator fan

Note: High-current main fuses may also be mounted directly on the battery terminal housing cover.