The BMW F20/F21 is the second generation of the 1 Series five-door compact hatchback. Like its predecessor, it has rear-wheel drive, longitudinal engine layout and 50:50 axle weight distribution. In this article we will understand in detail fuse box diagrams BMW 1 F20 / F21 (2nd Gen; 144d, 114i, 116d, 116i, 118d, 118i, 120d, 120i, 123d, 125i, 130i, 135i, m135i) 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2017, 2018, 2019, 2020 years of manufacture.
Here you will find the locations and photos of the mounting blocks. Also, we will separately mark the fuse responsible for the cigarette lighter.
In the passenger compartment
The mounting block is located on the passenger side under the right pillar trim.
General view of the BMW 1 F20 / F21 interior fuse box.
Diagram
No.
Decryption
A
1
Spare
—
2
Spare
—
3
Spare
—
4
Electric drive of the passenger seat
30
5
central locking system
20
6
Driver's window elevator
30
7
Spare
8
Spare
—
9
Spare
—
10
Control Panel
5
Driver assistance system
Heating, ventilation and air conditioning (HVAC)
Light switch
11
Rear module
7.5
Left headlight
12
Diagnostic socket
7.5
13
Telematics
5
14
Horn (beep)
15
In the trunk
The mounting block is located on the right side under the floor, near the battery.
General view of the fuse box located in the trunk.
Diagram
No.
Decryption
A
1
Camera control unit
5
2
Radio control unit
15
6
Audio system
5
9
telematics
5
10
Radio control unit
20
11
hi-fi amplifier
30
14
Trailer towing module
20
15
20
22
Alarm system
5
Microwave sensor
23
remote control receiver
5
Vacuum leak detection
33
Audio system
10
34
DVD player
5
35
Main board
5
46
End connector
20
49
DC-DC Converter
30
In the engine compartment
Here there are four units responsible for the protection of the vehicle's electrical circuits.
The main unit
It is located under the plastic cover on the right side (left side on right-hand drive models). There is an additional relay block and a power board with fusible links.
General view.
Diagram
No.
Decryption
A
1
Empty
—
2
Empty
—
3
Control unit, roof electronics
5
4
Empty
—
5
Door locks
7.5
Passenger-side rearview mirror
6
The engine control unit
10
7
Electronic automatic transmission (EAT) control unit
10
8
touch box
5
Body control unit
9
Empty
—
10
Seat adjustment
10
11
Front left lamp
5
Front right lamp
Rain sensor
Interior lighting
12
trip relay
5
Dynamic Stability Control (DSC)
13
Empty
—
14
Empty
—
15
transfer case
5
16
coolant pump
10
Air conditioning compressor
Additional water pump
17
Empty
18
Empty
—
19
Electrochromic rear view mirror
5
20
Empty
—
21
Driver assistance system
5
22
Cruise control
5
23
Crankcase ventilation heater
5
Coolant shut-off valve
24
Empty
—
25
Steering column switches
10
26
Empty
—
27
instrument cluster
5
28
Empty
—
29
instrument cluster
7.5
30
Glove box illumination
5
31
Selector switch
7.5
32
Electronic Power Steering (EPS)
5
33
Air quality sensor
5
34
39
Empty
—
40
Fuse box
40
41
Dynamic Stability Control (DSC)
30
42
44
Empty
—
45
folding roof
30
46
transfer case
30
47
Passenger seat heating
20
48
Heated driver's seat
20
49
BMW f20 / f21 cigarette lighter fuse
20
50
Driver's seat control unit
30
Driver seat adjustment
51
Passenger seat adjustment
30
Passenger seat control unit
52
12V power outlet
53
Empty
—
Additional unit #1
Located next to the main unit.
Diagram
No.
Decryption
A
1
Engine management
20
2
20
3
10
4
15
5
20
6
40
7
coolant pump
50
R1
Main relay DDE
Power fusible links
The panel is located near the main fuse box.
Diagram
No.
Description
A
FL1
Trip relay
50
80
125
FL2
Electronic Power Steering (EPS)
125
FL3
Additional heater
100
FL4
Heated fuel filter
40
FL5
Dynamic Stability Control (DSC)
40
FL6
blower motor
40
Additional unit #2
Located on the left side of the engine compartment.