Volkswagen ID.4 was produced in 2020, 2021, 2022, 2023, 2024, 2025 on a common base with Volkswagen ID.5 with body designations E21 and E39. During this time, the model underwent a facelift. In this material you will find a description of fuses and relays Volkswagen ID 4 ID 5 with fuse box diagrams and their locations. Let’s highlight the fuse responsible for the cigarette lighter.
The purpose of fuses and relays may differ from those presented and depend on the level of electrical equipment, region of delivery and year of manufacture of your vehicle.
Contents
Engine compartment
Under the hood on the left side, in the engine compartment, there are 2 fuse boxes.
Fuse and relay box
Location
Photo example
Diagram
Assignment
| F1 | – |
| F2 | 7.5A ABS control unit |
| F3 | 10A Charger 1 for high voltage battery |
| Electric drive power and control electronics | |
| Power and control electronics 2 for electric drive | |
| F4 | 30A Front left headlight |
| F5 | 30A Front right headlight |
| F6 | 7.5A Adaptive Cruise Control |
| F7 | 30A Front right wipers |
| F8 | – |
| F9 | 15A On-board power supply control unit (horn) |
| F10 | 30A Wiper motor control unit |
| Front wipers, left | |
| F11 | 7.5A Air Conditioning Relay |
| F12 | 7.5A Engine Sound Generator Module 1 |
| F13 | 25A ABS control unit |
| F14 | – |
| F15 | 40A ABS control unit |
| F16 | 50A Radiator Fan |
| F17 | 40A Heated windshield |
| F18 | – |
| F19 | – |
| F20 | – |
| F21 | – |
| F22 | – |
| F23 | 10A Engine/motor control unit |
| F24 | 5A Radiator Fan |
| F25 | 10A Coolant Pump for High Voltage Battery |
| PTC 3 heating element | |
| F26 | 10A Coolant pump for low temperature circuit |
| Radiator roller shutter control motor | |
| F27 | – |
| F28 | – |
| F29 | – |
| F30 | – |
| F31 | – |
| F32 | 50A Brake booster |
| R1 | Main relay |
| R2 | Heated windshield relay |
| R3 | Horn relay |
| R4 | – |
| R5 | – |
| R6 | Air conditioning relay |
Power fuse box
This unit is installed on the battery cover, next to the fuse and relay box.
Diagram
Designation
| 508 | Battery |
| SA1 | 350A Voltage Converter |
| SA2 | 80A Battery Monitor Control Unit |
| Power steering control unit | |
| SA3 | 100A Fuse Holder C (under dash) |
| SA4 | 100A Fuse Holder C |
| SA5 | – |
| SA6 | 125A Fuse holder B (fuse box under the hood) |
Passenger compartment
Fuse and relay box
In the cabin, the fuse and relay box is located on the left side under the instrument panel.
Example for right-hand drive vehicles.
Photo example
Diagram
Allocation
| SC1 | – |
| SC2 | 15A Airbag control unit |
| SC3 | 25A Trailer detector control unit |
| SC4 | 7.5A Front camera for driver assistance systems |
| SC5 | 25A On-board power supply control unit (left external lighting) |
| SC6 | 30A On-board power supply control unit (interior lighting) |
| SC7 | 30A Heater and air conditioning control unit (seat heating) |
| SC8 | 15A Control unit for adjusting the sliding sunroof |
| SC9 | 30A Driver’s door control unit (For left-hand drive models) |
| Front passenger door control unit For right-hand drive models) | |
| Rear driver’s door control unit (For left-hand drive models) | |
| Passenger’s rear door control unit For right-hand drive models) | |
| SC10 | 10A Left rear light |
| Central rear light unit | |
| SC11 | 15A Trailer detector control unit |
| SC12 | – |
| SC13 | 40A On-board power supply control unit (central locking) |
| SC14 | 30A Digital audio control unit |
| SC15 | – |
| SC16 | – |
| SC17 | 5A Parking assistance control unit |
| Lane change assist control unit | |
| Lane change assist control unit 2 | |
| SC18 | 5A Control unit for electronic steering column lock |
| Electric trunk lid opening control unit | |
| Interface for login and launch system | |
| Control unit 2 for burglary protection | |
| Control unit 3 for burglary protection | |
| Control unit 4 for burglary protection | |
| Control unit 5 for burglary protection | |
| Control unit for mobile entry and start authorization system | |
| Engine Sound Generator Module 2 | |
| SC19 | 5A Emergency call module control unit and communication unit |
| Control unit with driver information system display | |
| SC20 | 7.5/10A Telephone bracket |
| Transmission and reception stabilization control unit | |
| USB connection 1 | |
| SC21 | 7.5A Rear cover handle |
| Top view camera control unit | |
| SC22 | 10A Engine/motor control unit |
| SC23 | 5A Internet access control unit |
| SC24 | 10A Right group of rear lights |
| Central rear light unit | |
| SC25 | 25A Front left seat belt |
| SC26 | 30A Driver’s door control unit (For right-hand drive models) |
| Front passenger door control unit (For left-hand drive models) | |
| Rear driver’s door control unit (for right-hand drive models) | |
| Passenger’s Rear Door Control Module (Left-Hand Drive Models) | |
| SC27 | 25A Front right seat belt |
| SC28 | 10A Battery Regulation Unit |
| Connector for high voltage system service | |
| SC29 | 15A Trailer detector control unit |
| SC30 | 20/25A Information electronics control unit 1 |
| SC31 | 25A Trailer detector control unit |
| SC32 | 25A On-board power supply control unit (right exterior lighting) |
| SC33 | – |
| SC34 | 15A Heating and air conditioning system control unit |
| SC35 | 40A Heated rear seats |
| SC36 | 40A Supply air fan control unit |
| SC37 | 30A Rear cover control unit |
| SC38 | 7.5A Front left massage seat control unit |
| Front right massage seat control unit | |
| SC39 | 15A Steering column electronics control unit |
| SC40 | 7.5/10A Horn |
| SC41 | 5A Data bus diagnostic interface |
| SC42 | – |
| SC43 | 7.5A Control and display unit for rear air conditioning system |
| Carbon dioxide concentration sensor in the cabin | |
| Car interior temperature sensor | |
| Heated rear window relay | |
| SC44 | 7.5A Power window control unit in the driver’s door |
| Diagnostic connection | |
| Light switch (low beam) | |
| Rain and light sensor, | |
| Background lighting | |
| IDENTIFIER. Light | |
| SC45 | 5A Steering column electronics control unit |
| SC46 | 7.5/10A Front information display unit and control unit control unit |
| Head-up display control unit | |
| SC47 | 10A Electronic Damping Control Unit |
| SC48 | 7.5A/10A USB charging port 1 |
| SC49 | – |
| SC50 | – |
| SC51 | – |
| SC52 | 20A 12V socket 3 |
| SC53 | – |
| SC54 | – |
| SC55 | – |
| SC56 | – |
| SC57 | – |
| SC58 | 7.5A Control unit for mobile entry and start authorization system |
| SC59 | 7.5A Seat occupied recognition control unit |
| Relay for sockets | |
| Auto-dimming interior mirror. | |
| SC60 | 7.5A Diagnostic connection |
| SC61 | 5A Power and control electronics of the electric drive |
| Power and control electronics 2 for electric drive | |
| SC62 | – |
| SC63 | – |
| SC64 | – |
| SC65 | – |
| SC66 | 15A Rear window wiper motor |
| SC67 | 30A Frequency Modulation (FM) Filter in Positive Wire |
| Heated rear window | |
| R1 | Relay for sockets |
| R2 | Relay for supplying voltage to terminal 15 |
| R3 | Heated rear window relay |
Fuses 48 and 52 are responsible for the operation of USB sockets and the cigarette lighter.
Additional fuses can be installed nearby, for example, in the upper part there is a 30A potentiometer for electric trailer brakes (for the American market), and on the right there are 2 pieces of 15A each responsible for the driver and passenger seat adjustment control units (large blue ones in the photo).
That’s all. And if you have something to add, write in the comments.