Seat Leon (2006) – fuse box diagram
Year of production: 2006
Fuses on left side of dash panel
| Number | Component | Ampers |
| 1 | Diagnosis control unit/Instrument lighting/ Headlight adjustment control unit/ Flow meter/ Heated windscreens | 10 |
| 2 | Engine control unit/ ABS-ESP control unit/ Automatic gearbox/ Instrument panel/ Trailer control unit/Lights switch/ Brake sensor/ Power steering/ Left and right headlight | 5 |
| 3 | Airbag | 5 |
| 4 | Heating/ Reverse gear switch/ASR-ESP switch/ Telephone/ Jet/ Electrochromatic mirror | 5 |
| 5 | Right hand side xenon headlight | 5 |
| 6 | Left hand side Xenon headlight | 5 |
| 7 | — | — |
| 8 | Trailer pre-installation kit (assistance solution) | 5 |
| 9 | — | — |
| 10 | — | — |
| 11 | — | — |
| 12 | Central locking | 10 |
| 13 | Diagnosis/ Lights switch/ Rain sensor | 10 |
| 14 | Automatic gearbox/ Heating/ ESP control unit/ Automatic gearbox lever | 5 |
| 15 | Cable control unit | 7,5 |
| 16 | — | — |
| 17 | Alarm | 5 |
| 18 | — | — |
| 19 | Antifog kit (assistance solution) | |
| 20 | — | — |
| 21 | Engine D2L (2.0 litre 147 kW 4 speed TFSI) | 10 |
| 22 | Fan control | 40 |
| 23 | Front electric windows | 30 |
| 24 | — | — |
| 25 | Rear window heater | 25 |
| 26 | Rear electric windows | 30 |
| 27 | Engine (gauge/fuel pump relay) | 15 |
| 28 | Convenience controls | 25 |
| 29 | — | — |
| 30 | Automatic gearbox | 20 |
| 31 | Vacuum pump | 20 |
| 32 | — | — |
| 33 | Sunroof | 30 |
| 34 | Convenience controls | 25 |
| 35 | — | — |
| 36 | Headlight washer system | 20 |
| 37 | Heated seats | 30 |
| 38 | Engine D2L (2.0 litre 147 kW 4 speed TFSI) | 10 |
| 39 | — | 20 |
| 40 | Fan control | 40 |
| 41 | Windscreen washer motor/ Cable control unit | 15 |
| 42 | 12V socket/lighter | 15 |
| 43 | Trailer bracket pre-installation | 15 |
| 44 | Trailer bracket pre-installation | 20 |
| 45 | Trailer bracket pre-installation | 15 |
| 46 | — | — |
| 47 | Engine D2L (2.0 litre 147 kW 4 speed TFSI) | 10 |
| 48 | Engine D2L (2.0 litre 147 kW 4 speed TFSI) | 10 |
| 49 | — | — |
Fuses layout, engine compartment, left part
| Number | Component | Ampers |
| 1 | Clean | 30 |
| 2 | Steering column | 5 |
| 3 | Cable control unit | 5 |
| 4 | ABS | 30 |
| 5 | AQ gearbox | 15 |
| 6 | Instrument panel | 5 |
| 7 | — | — |
| 8 | Radio | 15 |
| 9 | Telephone | 5 |
| 10 | Main relay in the FSI / diesel engine compartment / injection module supply | 5 |
| Main relay in the engine compartment D2L (2.0 FSI 147 kW) | 10 | |
| 11 | — | — |
| 12 | Gateway | 5 |
| 13 | Petrol injection module supply | 25 |
| Diesel injection module supply | 30 | |
| 14 | Coil | 20 |
| 15 | Engine T71 / 20 FSI | 5 |
| Pump relay | 10 | |
| 16 | ADS pump | 30 |
| 17 | Horn | 15 |
| 18 | — | — |
| 19 | Clean | 30 |
| 20 | — | — |
| 21 | Lambda probe | 15 |
| 22 | Brake pedal, speed sensor | 5 |
| 23 | Engine 1.6, main relay (relay n° 100) | 5 |
| T 71 diesel EGR | 10 | |
| 2.0 D2L High-pressure fuel pump | 15 | |
| 24 | ARF, change valve | 10 |
| 25 | Right lighting | 40 |
| 26 | Left lighting | 40 |
| 27 | 1.6 SLP engine | 40 |
| 1.9 TDI glow plug relay | 50 | |
| 28 | KL15 | 40 |
| 29 | Electric windows (front and rear) | 50 |
| Electric windows (front) | 30 | |
| 30 | X – relief relay | 40 |
Position in engine compartment: side box
| Number | Component | Ampers |
| B1 | Alternator < 140 W | 150 |
| Alternator > 140 W | 200 | |
| C1 | Power steering | 80 |
| D1 | Multi-terminal voltage supply “30”. Internal fuse box | 100 |
| E1 | Ventilator < 500 W / Ventilator > 500 W | 50 |
| 80 | ||
| F1 | PTCs (Supplementary electrical heating using air) | 100 |
| G1 | Trailer fuse voltage supply in internal fuse box | 50 |
| H1 | Central locking control unit (4F8 with autolock) | — |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.