McLaren 750S 2026 Fuse Box Info
Passenger compartment fuse box location:
The fuse box A (Main fuse box) is located behind a panel in the rear bulkhead, behind the driver seat.
The fuse box B (Secondary fuse box) is located below the dashboard on the passenger’s side.
Luggage compartment fuse box location:
The fuse box is located on top of the battery.
Fuse Box Diagram | Layout
Passenger compartment fuse box A:
| Fuse/Relay N° | Rating | Functions |
| F1 | 60A | Right-Hand Secondary Air Pump |
| F2 | 60A | Left-Hand Secondary Air Pump |
| F3 | 20A | Tonneau Motor Right-Hand (Spider Only) |
| F4 | 20A | Tonneau Motor Left-Hand (Spider Only) |
| F5 | 30A | Transmission Control Unit |
| F6 | 30A | Transmission Control Unit |
| F7 | 30A | Starter |
| F8 | 30A | Heated Rear Window |
| F9 | 30A | Audio Amplifier (Optional) |
| F10 | 20A | Roof Central ECU (Spider Only) |
| F11 | 20A | Roof Central ECU (Spider Only) |
| F12 | 20A | Roof Main Motor Left-Hand (Spider Only) |
| F13 | 5A | Transmission Control Unit |
| F14 | 5A | Engine ECU |
| F15 | 10A | Relays |
| F16 | 2A | Surround View Camera Controller (Optional) |
| F17 | 3A | Door Locking Switch |
| F18 | 50A | ECU Main Relay Control |
| F19 | 40A | Fuel PEM 1 |
| F20 | 30A | Seat Driver |
| F21 | 30A | Seat Passenger |
| F22 | 20A | Roof Main Motor Right-Hand (Spider Only) |
| F23 | 5A | Tilt and Microwave Sensor |
| F24 | 20A | Infotainment ECU |
| F25 | 10A | Driver & Passenger Door Latch |
| F26 | 3A | Auxiliary USB Board |
| F27 | 2A | Infotainment Safe |
| F28 | - | - |
| F29 | 20A | EVAC Pump |
| F30 | - | - |
| F31 | 50A | Cooling Fan Left-Hand |
| F32 | 50A | Cooling Fan Right-Hand |
| F33 | - | - |
| F34 | - | - |
| F35 | 30A | Fuel PEM 2 |
| F36 | 20A | Battery Main Relay |
| F37 | 15A | Canister Purge, Secondary Air Valves, Lambda Sensors |
| F38 | 15A | Left-Hand MAF Sensor, Fuel Injection and Ignition (5, 6, 7, 8), Cam Sensors |
| F39 | 15A | Right-Hand MAF Sensor, Fuel Injection and Ignition (1, 2, 3, 4), Crank Sensor, Cam Sensors |
| F40 | 10A | Dump Valve, Fuel Tank DMTL, Wastegate Actuator Solenoids |
| R41 | - | - |
| R42 | - | - |
| R43 | - | - |
| R44 | - | - |
| F45 | 10A | Electrical Thermostats, Camshaft Actuators |
| F46 | 3A | Output Shaft Speed, Even Gear Shaft Speed |
| F47 | 3A | Input Shaft Speed, Odd Gear Shaft Speed |
| F48 | - | - |
| F49 | 5A | Starter |
| R50 | - | EVAC Pump |
| R51 | - | Heated Rear Window |
| R52 | - | Fuel PEM 2 |
| R53 | - | Transmission Control Unit |
| R54 | - | Transmission Control Unit |
| R55 | - | Starter |
| R56 | - | Right-Hand Secondary Air Pump RH, Power ISO |
| R57 | - | Cooling Fan, Change Over Relay |
| R58 | - | ECU Main Relay |
| R1 | - | High Cooling Fan |
| R2 | - | Left-Hand Secondary Air Pump |
| R3 | - | Low Cooling Fan |
| R4 | - | Fuel PEM 1 |
Passenger compartment fuse box B:
| Fuse/Relay N° | Rating | Functions |
| F1 | 20A | Door ECU Driver |
| F2 | 20A | Door ECU Passenger |
| F3 | 25A | BCU (Lighting) |
| F4 | 35A | BCU (LED) |
| F5 | 35A | BCU (Body 1) |
| F6 | 35A | BCU (Body 2) |
| F7 | 35A | BCU (Security) |
| F8 | 5A | Ethernet Switch |
| F9 | - | - |
| F10 | - | - |
| F11 | - | - |
| F12 | - | - |
| F13 | - | - |
| F14 | 5A | CCU |
| F15 | 10A | HVAC Controller |
| F16 | 3A | Alarm Control Unit |
| F17 | 3A | Tracker |
| F18 | 7.5A | SCUG |
| F19 | 5A | Infotainment Display |
| F20 | 3A | CCU Relays |
| F21 | 3A | Radio Tuner |
| F22 | - | - |
| F23 | 10A | Driver Display |
| F24 | 5A | Development Connector |
| F25 | 10A | OBD2 Diagnostics |
| F26 | - | - |
| F27 | - | - |
| F28 | - | - |
| R29 | - | CCU |
| R30 | - | CCU |
Luggage compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| F1 | 30A | Transmission Control Unit |
| F2 | 30A | Transmission Control Unit |
| F3 | 30A | Air Conditioning - Motor - Control Module |
| F4 | 50A | Secondary Fuse Box Supply |
| F5 | 40A | Electronic Stability Control Valves |
| F6 | 40A | Electronic Stability Control Motor |
| F7 | 20A | Auxiliary Power Socket - Luggage Compartment |
| F8 | 40A | Secondary Fuse Box Supply |
| F9 | 100A | Electro Hydraulic Power Assisted Steering |
| F10 | 200A | Main Fuse Box Supply |
| F11 | 30A | Secondary Fuse Box Supply |
