Audi A3 (2012 – 2016) – fuse box diagram

Year of production: 2012, 2013, 2014, 2015, 2016

Fuses in the interior

The fuses are behind the cover in the steering column area.

№	Equipment
1	Engine components
2	Seat adjustment
3	Hydraulic pump cover (Cabriolet)
4	MMI control panel, MMI components
5	Gateway
6	Selector lever (automatic transmission)
7	Climate/heating control, auxiliary heating, rear window defogger relay
8	Diagnosis, electromechanical parking brake switch, light switch, rain and light sensor, interior lighting communication box (Plug-in hybrid drive*) anti-theft alarm system
9	Steering column switch module
10	Display
11	Reversible driver’s side safety belt tensioners
12	MMI area
13	Adaptive dampers control module / service plug (Plug-in hybrid drive*)
14	Climate control system blower
15	Electronic steering column lock
16	MMI area
17	Instrument cluster
18	Rearview camera
19	Convince key system control module, tank system
20	Tank system
21	–
22	–
23	Exterior lighting, heated washer fluid nozzles
24	Panorama sunroof / power top control module, power top latch (Cabriolet)
25	Door/driver’s side doors (for example power windows)
26	Seat heating
27	Sound-amplifier
28	Power top control module, electronics (Cabriolet)
29	Interior lights
30	–
31	Exterior lighting
32	Driver assistance systems
33	Airbag
34	Button illumination, coils for upper cabin heating relay (Cabriolet) and socket relay, interior sound, reversing light switch, temperature sensor
35	Function lighting, diagnosis, headlight range control system, air quality sensor, automatic dimming rearview mirror
36	Right cornering light / right LED-headlight
37	Left cornering light / left LED-headlight
38	High-voltage battery (Plug-in hybrid drive*)
39	Door/front passenger’s side doors (for example, power windows)
40	Sockets
41	Reversible front passenger’s side safety belt tensioners
42	Central locking components, windshield washer system
43	Fleadlights, lighting
44	All wheel drive
45	–
46	–
47	Rear window wiper
48	Outer noise amplifier (Plug-in hybrid drive*)
49	Starter, clutch sensor, headlight relay coil, high-voltage battery (Plug-in hybrid drive*)
50	–
51	–
52	–
53	Rear window defogger
The power seats* are protected via circuit breakers that automatically switch on after a few seconds after the overload has been reduced.

Fuses in the engine compartment

№	Equipment
1	ESC control module
2	ESC control module
3	Engine control module (gasoline/diesel)
4	Engine cooling, engine components, auxiliary heater coil relay (1+2), secondary air injection pump relay
5	Engine components, tank system
6	Brake light sensor
7	Engine components, water pumps
8	Oxygen sensor
9	Engine components, exhaust door, glow time control module, SULEV valve
10	Fuel injectors, fuel control module
11	Auxiliary heater heating element 2
12	Auxiliary heater heating element 3
13	Automatic transmission control module
14	–
15	Horn
16	Ignition coil/power electronics (Plug-in hybrid drive*)
17	ESC control module, engine control module
18	Terminal 30 (reference voltage)
19	Windshield wipers
20	Horn
21	–
22	Terminal 50 diagnosis
23	Starter
24	Auxiliary heater heating element 1, brake booster (Plug-in hybrid drive*)
25	–
26	–
27	–
28	–
29	–
30	–
31	Vacuum pump/water pump (Plug-in hybrid drive*)
32	LED headlights
33	Brake booster memory (Plug-in hybrid drive*)
34	Brake booster control (Plug-in hybrid drive*)
35	Relay (Plug-in hybrid drive*)
The power seats* are protected via circuit breakers that automatically switch on after a few seconds after the overload has been reduced.

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.