The BMW F20/F21 is the second generation of the 1 Series compact hatchback. Like its predecessor, it features rear-wheel drive, a longitudinal engine layout, and a 50:50 axle weight distribution. In this article, we provide a detailed overview of the fuse box diagrams for the second-generation BMW 1 Series F20/F21 (114d, 114i, 116d, 116i, 118d, 118i, 120d, 120i, 123d, 125i, 130i, 135i, and M135i) covering the 2011 through 2020 model years.
Here, you will find the locations and images of the power distribution boxes. Additionally, we have specifically identified the fuse responsible for the cigarette lighter receptacle.
Passenger Compartment
The power distribution box is located on the passenger side, beneath the right A-pillar trim.
General view of the interior fuse box for the BMW 1 Series F20/F21.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Spare | — |
| 2 | Spare | — |
| 3 | Spare | — |
| 4 | Passenger seat power adjustment | 30 |
| 5 | Central locking system | 20 |
| 6 | Driver's side power window | 30 |
| 7 | Spare | |
| 8 | Spare | — |
| 9 | Spare | — |
| 10 | Control panel | 5 |
| Advanced Driver Assistance Systems (ADAS) | ||
| Heating, ventilation, and air conditioning (HVAC) | ||
| Light switch module | ||
| 11 | Rear Electronic Module (REM) | 7.5 |
| Left headlamp | ||
| 12 | On-board diagnostics (OBD) port | 7.5 |
| 13 | Telematics control module | 5 |
| 14 | Horn | 15 |
Luggage Compartment
The power distribution box is located on the right side, beneath the floor panel, adjacent to the battery.
General view of the luggage compartment fuse box.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Camera control module | 5 |
| 2 | Radio control module | 15 |
| 6 | Audio system | 5 |
| 9 | Telematics control module | 5 |
| 10 | Radio control module | 20 |
| 11 | Hi-Fi audio amplifier | 30 |
| 14 | Trailer tow module | 20 |
| 15 | 20 | |
| 22 | Anti-theft alarm system | 5 |
| Interior motion sensor (microwave) | ||
| 23 | Remote control receiver | 5 |
| Evaporative emission (EVAP) leak detection pump | ||
| 33 | Audio system | 10 |
| 34 | DVD player | 5 |
| 35 | Head unit mainboard | 5 |
| 46 | Terminating connector | 20 |
| 49 | DC/DC converter | 30 |
Engine Compartment
There are four power distribution units in this location responsible for protecting the vehicle's electrical circuits.
Main Fuse Box
It is located beneath the plastic cowl cover on the right side (left side on right-hand-drive models). This area also houses an additional relay box and a power distribution board equipped with fusible links.
General view.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Empty | — |
| 2 | Empty | — |
| 3 | Roof electronics control module (FZD) | 5 |
| 4 | Empty | — |
| 5 | Door lock actuators | 7.5 |
| Passenger-side exterior mirror | ||
| 6 | Engine control module (DME/DDE) | 10 |
| 7 | Electronic Automatic Transmission (EGS) control module | 10 |
| 8 | Touchbox control module | 5 |
| Body control module (FEM/BDC) | ||
| 9 | Empty | — |
| 10 | Power seat adjustment | 10 |
| 11 | Front left headlamp | 5 |
| Front right headlamp | ||
| Rain sensor | ||
| Interior lighting | ||
| 12 | Main circuit relay (Terminal 15) | 5 |
| Dynamic Stability Control (DSC) module | ||
| 13 | Empty | — |
| 14 | Empty | — |
| 15 | Transfer case control module (VTG) | 5 |
| 16 | Electric coolant pump | 10 |
| A/C compressor clutch | ||
| Auxiliary water pump | ||
| 17 | Empty | |
| 18 | Empty | — |
| 19 | Automatic-dimming interior rearview mirror | 5 |
| 20 | Empty | — |
| 21 | Advanced Driver Assistance Systems (ADAS) | 5 |
| 22 | Cruise control system | 5 |
| 23 | Positive crankcase ventilation (PCV) heater | 5 |
| Coolant shut-off valve | ||
| 24 | Empty | — |
| 25 | Steering column switch cluster (SZL) | 10 |
| 26 | Empty | — |
| 27 | Instrument cluster (KOMBI) | 5 |
| 28 | Empty | — |
| 29 | Instrument cluster (KOMBI) | 7.5 |
| 30 | Glove box illumination | 5 |
| 31 | Gear selector switch (GWS) | 7.5 |
| 32 | Electronic Power Steering (EPS) module | 5 |
| 33 | Automatic air recirculation (AUC) sensor | 5 |
| 34 39 |
Empty | — |
| 40 | Power distribution box | 40 |
| 41 | Dynamic Stability Control (DSC) module | 30 |
| 42 44 |
Empty | — |
| 45 | Convertible top control module | 30 |
| 46 | Transfer case control module (VTG) | 30 |
| 47 | Passenger heated seat module | 20 |
| 48 | Driver's heated seat module | 20 |
| 49 | BMW F20/F21 cigarette lighter fuse | 20 |
| 50 | Driver's seat control module | 30 |
| Driver's power seat adjustment | ||
| 51 | Passenger's power seat adjustment | 30 |
| Passenger seat control module | ||
| 52 | 12V power receptacle | |
| 53 | Empty | — |
Auxiliary Relay Box 1
Located adjacent to the main fuse box.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Engine management system | 20 |
| 2 | 20 | |
| 3 | 10 | |
| 4 | 15 | |
| 5 | 20 | |
| 6 | 40 | |
| 7 | Electric coolant pump | 50 |
| R1 | DDE (Digital Diesel Electronics) main relay | |
Power Fusible Links
This distribution block is located adjacent to the main engine compartment fuse box.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| FL1 | Main circuit relay | 50 80 125 |
| FL2 | Electronic Power Steering (EPS) module | 125 |
| FL3 | PTC auxiliary heater | 100 |
| FL4 | Fuel filter heater | 40 |
| FL5 | Dynamic Stability Control (DSC) module | 40 |
| FL6 | HVAC blower motor | 40 |
Auxiliary Relay Box 2
Located on the left side of the engine compartment.
| Diagram | ||
|---|---|---|
|
||
| No. | Description | A |
| 1 | Fuel rail pressure control valve | 20 |
| Fuel quantity control valve | ||
| Camshaft position (CMP) sensor | ||
| Pressure regulating valve | ||
| 2 | Pre-catalytic converter oxygen (O2) sensor | 20 |
| Post-catalytic converter oxygen (O2) sensors | ||
| Mass airflow (MAF) sensor | ||
| Engine oil level sensor | ||
| Exhaust Gas Recirculation (EGR) cooler bypass valve | ||
| 3 | DDE (Digital Diesel Electronics) control module | 30 |
| R1 | DDE (Digital Diesel Electronics) main relay | |
