BMW 3-Series G20, G21 (2019 – 2026) Fuse Box Location & Diagrams
Electrical issues in your modern BMW 3-Series can be incredibly frustrating to diagnose. Whether you own a G20 sedan or a G21 touring model, finding the right circuit is essential for maintenance. This comprehensive resource provides exact fuse box locations and clear, reliable wiring diagrams to help you identify and resolve any electrical faults quickly, efficiently, and safely.
Fuse Box Location
Passenger Compartment Fuse Box
Two fuse panels are located under the dashboard – the first on the passenger side, the second on the driver side. There are also several fuses on the Body Domain Controller, which is located in the passenger-side pillar, behind the trim.
Luggage Compartment Fuse Box
It is located behind the trim panel on the right side.
Fuse Box Diagrams
Passenger Compartment Fuse Box
Passenger side fuse box (2019 – 2026)
| № | Amps | Description |
|---|---|---|
| 20 | 30A | Power window actuator driver’s door with control electronics |
| 21 | 30A | Passenger windshield with control electronics |
| 22 | 30A | Driver’s side rear power window with control electronics |
| 23 | 30A | Passenger side electric rear window with control electronics |
| 24 | 30A | Left Reversible Electromotive Auto Retractor (Seat Belt) |
| 25 | 20A | Roof function center |
| 26 | 40A | Domain Controller Body |
| 28 | 40A | Dynamic Stability Control (DSC) |
| 29 | 20A | Electronic transmission control, transfer case |
| 30 | 15A | Multimedia system |
| 32 | Control panel in the center console, parking | |
| 33 | 5A | Battery |
| 34 | 5A | Instrument cluster control unit |
| 36 | 5A | Root Function Center (Map Light, Interior Light, Ambient Light) |
| 37 | 5A | Central locking |
| 38 | 5A | Driver’s door outside handle electronic module |
| 39 | 60A | Domain Controller Body |
| 40 | 40A | Fan motor with output stage |
| 46 | 20A | Lighter thermoelectric cup holder |
| 47 | 20A | Motor management |
| 48 | 20A | Heated seats |
| 49 | 10A | Electric steering column adjustment |
| 50 | 30A | Heated seats |
| 51 | 30A | Motor management |
| 52 | 20A | Seat heating electronics |
| 53 | 30A | Trailer module |
| 54 | 20A | Autonomous additional heater |
| 55 | 30A | Seat Module (with Seat Module), Seat Adjust Switch Block (without Seat Module) |
| 56 | 30A | Seat Module (with Seat Module), Seat Adjust Switch Block (without Seat Module) |
| 57 | 10A | Electric steering column adjustment |
| 59 | 5A | Electrochromic interior rear view mirror |
| 60 | 5A | Driver Assistant |
| 61 | 5A | Rear center door trim illumination (driver’s side), rear door pocket illumination (driver’s side), rear door handle illumination (driver’s side), driver’s side rear door trim illumination (top), rear left speaker illumination additional water pump (Diesel) |
| 62 | 5A | Auxiliary battery, instrument panel speaker light, air freshener, CD drive, ionizer, 48V starter-alternator (B57, B58) |
| 63 | 5A | Glovebox Light Switch Driver Camera System 48V Power Control Unit (PCU48), 48V Battery |
| 64 | 5A | Driver’s seat back width adjustment valve block driver’s lumbar support valve block, seat adjustment switch block (driver’s side), footwell rear light (driver’s side), driver’s seat rear panel illumination USB charging port, front left inflation module seats |
| 65 | 5A | Front Passenger Backrest Width Adjustment Valve Block Front Passenger Lumbar Support Valve Block, Seat Adjustment Switch Block (Front Passenger Side), Rear Footwell Light (Front Passenger Side), Front Passenger Backrest Rear Panel Light USB charging connector No.2, front right seat inflation module |
| 66 | 5A | Upper Center Instrument Panel Light Front Passenger Side Upper Instrument Panel Light, Lower Center Instrument Panel Light, Driver/Passenger Side Lower Instrument Panel Light Front Left/Right Footwell Light |
| 67 | 5A | Driver’s door switch box, Driver’s door switch box, Driver’s door inner handle illumination Driver’s door panel illumination (center), Driver’s door pocket illumination Driver’s door panel illumination (top), Front left midrange speaker illumination Front left tweeter Lighting |
| 68 | 5A | Passenger Exterior Mirror, Passenger Door Switch Box, Passenger Door Inner Door Handle Lights, Front Passenger Door Panel Lights (Center), Passenger Door Pocket Lights, Front Passenger Door Panel Lights (Top), Front Right Midrange Loudspeaker Lights, illumination of the front right tweeter |
| 69 | 5A | Radiator louvers (upper, lower) |
| 70 | 5A | Rear switchboard electric fan off relay, electric fan |
| 71 | 5A | Surround camera (with surround camera), rear view camera |
| 72 | 7.5A | Motor control |
| 73 | 5A | Instrument cluster control unit |
| 74 | 10A | USB socket |
| 75 | 10A | Failsafe protection module |
| 76 | 5A | Driver Assistant |
Driver side fuse box (2019 – 2026)
| Fuse / Relay № | Amperage | Description |
| F101 | — | Not used |
| F102 | 7.5A | Electronics motor control |
| F103 – F106 | — | Not used |
| F107 | 10A | Hybrid: Pressurized fuel tank control module |
| F108 – F116 | — | Not used |
| F117 | 30A | Hybrid: Automatic transmission transfer case |
| F118 | 5A | Auxiliary electric heater, front midrange speaker illumination |
| F119 – F131 | — | Not used |
| R1 | — | Not used |
| R2 | — | Not used |
Body Domain Controller (2019 – 2026)
| № | Amps | Description |
|---|---|---|
| F1 | 5A | Steering column transfer case, front center vent, audio control panel, lighting control unit, head unit |
| F2 | 7.5A | Diagnostic socket, electronic ride height control vertical dynamic platform |
| F3 | 7.5A | Heating/A/C system. Tailgate function module Rain/Light/Sun/Sun/Condensation: sensor |
| F4 | 5A | Passenger Side Outside Door Handle Control Module Rear Driver Side Outside Door Handle Control Module, Rear Passenger Side Outside Door Handle Control. Module Power Control Module Telematics Module |
| F5 | 20A | Latching Relay. Unlocking Relay (Doors, Fuel Cap) |
| F6 | 20A | Driver Door Lock Relay, Lock Relay (Driver Door Lock, Front Passenger Door Lock, Driver Rear Door Lock, Passenger Rear Door Lock, Fuel Filler Door Central, Lock Actuator) |
Luggage Compartment Fuse Box
BMW 3-Series (2019 – 2026)
| № | Amps | Description |
|---|---|---|
| 202 | DME – Digital Motor Electronics / Integrated Voltage Module – IVM | |
| 204 | 5A | Sistema de aire acondicionado |
| 206 | 5A | Fuel pump relay / Fuel pump control, DME – Digital Motor Electronics / Integrated Voltage Module – IVM |
| 208 | 5A | Driving assistance |
| 209 | 5A | Driving assistance, Gear Indicator / DSC – Dynamic Stability Control / SMG – Sequential Manual Gearbox, DME – Digital Motor Electronics / Integrated Voltage Module – IVM |
| 210 | 5A | Steering column function control module |
| 212 | 15A | Head-Up Display (HUD), Rear seat entertainment |
| 214 | 5A | Rear seat entertainment |
| 215 | 5A | Rear seat entertainment |
| 216 | 5A | Rear seat entertainment |
| 217 | 40A | Rear seat entertainment |
| 218 | 20A | Rear seat entertainment |
| 220 | 30A | Rear seat entertainment |
| 225 | 30A | Boot lid (tailgate) lock / Soft-close automatic for tailgate |
| 226 | 40A | Boot lid (tailgate) lock / Soft-close automatic for tailgate |
| 227 | 30A | DME – Digital Motor Electronics / Integrated Voltage Module – IVM |
| 230 | 30A | Seatbelts |
| 231 | 30A | Rear window defroster (defogger) |
| 232 | 40A | Rear window defroster (defogger) |
| 240 | 20A | Trailer module |
| 244 | 5A | Alarm, Fuel pump relay / Fuel pump control, Door module / Automatic soft-close, Hybrid system |
| 250 | 5A | Interior lights |
| 252 | 5A | Hybrid system |
| 254 | 5A | Boot lid (tailgate) lock / Soft-close automatic for tailgate |
| 255 | 5A | Driving assistance |
| 256 | 7.5A | Seatbelts |
| 257 | 5A | Seatbelts |
| 258 | 5A | Convertible top module / Convertible relay |
| 259 | 15A | DME – Digital Motor Electronics / Integrated Voltage Module – IVM |
| 260 | 5A | Electric fan |
| 262 | 5A | Air conditioner system |
| 264 | 10A | Boot lid (tailgate) lock / Soft-close automatic for tailgate |
| 265 | 30A | Heated seats |
| 266 | 40A | Convertible top module / Convertible relay |
| 268 | 40A | Convertible top module / Convertible relay |
| 269 | 30A | Heated seats |
| 271 | 30A | Fuel pump relay / Fuel pump control, DME – Digital Motor Electronics / Integrated Voltage Module – IVM |
| 273 | 20A | Front & rear cigarette lighter, 12V socket / Glove box charging socket (12V) |
| 278 | 5A | Hybrid system |
| 281 | 20A | Trailer module |
| 284 | 20A | Trailer module |
| 289 | 20A | Trailer module |
| 291 | 30A | Gear Indicator / DSC – Dynamic Stability Control / SMG – Sequential Manual Gearbox |
| 296 | 20A | Trailer module |
