Acura MDX (2001 – 2006) – fuse box diagram
Year of production: 2001, 2002, 2003, 2004, 2005, 2006
Engine compartment fuse and relay box

? | A | Component(s) or Circuit(s) Protected |
41 | 120 | Battery, Power distribution |
42 | 50 | Ignition switch (BAT), Optional connector U |
43 | 20 | Daytime running lights control unit (Canada), Headlight (right), Fog light relay |
44 | – | Not used |
45 | 20 | Daytime running lights control unit (Canada), Dimmer relay, Headlight (left), High beam indicator |
46 | 15 | Data link connector (DLC), Injectors, PGM-FI main relay 1, CMP sensor, CKP sensor A, CKP sensor B |
47 | 20 | Brake lights, Driver’s multiplex control unit, Horn (high), Ignition key switch, No. 90 fuse (in the auxiliary fuse holder 1), PCM, Trailer lighting connector, VSA modulator-control unit |
48 | 20 | Audio unit (without rear entertainment system), Front stereo amplifier*1, Rear stereo amplifier*3, Stereo amplifier*2 |
49 | 15 | Hazard warning lights |
50 | 20 | Fog lights |
51 | 40 | No.1, 7, 8,15, and 16 fuses (in the passenger’s under-dash fuse/relay box), Power window relay |
52 | 30 | Rear blower motor |
53 | 30 | Rear window defogger |
54 | 40 | No.9, 10, 11, 12 and 13 fuses (in the passenger’s under-dash fuse/relay box) |
55 | 40 | No.2, 3, 4, 5, 6 and 14 fuses (in the passenger’s under-dash fuse/relay box) |
56 | 40 | Blower motor relay |
57 | 30 | Radiator fan motor |
58 | 30 | A/C condenser fan motor |
59 | 7.5 | A/C compressor clutch |
• | – | Spare fuse |
Relay | ||
R1 | Headlight relay 1 (right) | |
R2 | Headlight relay 2 (left) | |
R3 | Horn relay | |
R4 | A/C condenser fan relay | |
R5 | Blower motor relay | |
R6 | Radiator fan relay | |
R7 | A/C compressor clutch relay | |
*1: ’03 model *2: ’04-06 models *3: All ’03 models and ’04-06 models without BOSE |
Under-hood Subfuse Box

? | A | Component(s) or Circuit(s) Protected |
1 | 20 | Audio unit (with rear entertainment system), Rear controller and screen (with rear entertainment system), OVD player unit (with rear entertainment system)*4 VTM-4 control unit*1,*2 |
2 | 40 | VSA modulator-control unit (+B FSR) |
3 | 30 | VSA modulator-control unit (+B MTR) |
4 | 20 | VTM-4 control unit*4 Audio unit (with rear entertainment system), Rear controller and screen (with rear entertainment system), OVO player unit (with rear entertainment system)*1,*2 |
5 | – | Not used |
6 | 20 | Rear accessory power socket |
7 | 15 | Throttle actuator control module |
8 | 15 | Ignition coils |
9 | 15 | A/F sensors (Bank 1, Bank 2), A/F sensor relay, Radiator fan relay, Engine mount control solenoid, EVAP canister purge valve, Secondary heated oxygen sensors (Bank 1, Bank 2), ELO unit*4 |
10 | 7.5 | PCM (VBU), TPMS control unit*3, HandsFreeLink control unit*3 |
11 | 20 | Power window control unit |
* 1: ’03 model * 2: ’04 model * 3: ’05 moqel * 4: ’04-06 models |
Driver’s Under-dash Fuse/Relay Box

? | Relay |
R1 | Starter cut relay |
R2 | Reverse relay |
R3 | Turn signal/hazard relay |
Passenger’s Under-dash Fuse/Relay Box

? | Relay |
R1 | Power window relay |
R2 | Accessory power socket relay |
R3 | Rear window defogger relay |
Auxiliary Fuse Holder’s
Alternator, ELD unit (’03 model), Immobilizer control unit-receiver, VSA modulator-control unit
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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