| Seat Leon I (1999 - 2006) | 1.4 16v | 55 kW / 75 PS | BCA | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.4 16v | 55 kW / 75 PS | AXP | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.4 16v | 55 kW / 75 PS | APE | MAGNETI MARELLI | IAW 4TV |
| Seat Leon I (1999 - 2006) | 1.4 16v | 55 kW / 75 PS | AHW | MAGNETI MARELLI | IAW 4MV |
| Seat Leon I (1999 - 2006) | 1.4 16v | 55 kW / 75 PS | AHW | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.6 16v | 77 kW / 105 PS | BCB | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.6 16v | 77 kW / 105 PS | AZD | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.6 16v | 77 kW / 105 PS | AUS | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.6 8v | 75 kW / 102 PS | BFQ | SIEMENS | SIMOS7.1 |
| Seat Leon I (1999 - 2006) | 1.6 8v | 74 kW / 101 PS | AKL | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.6 8v | 74 kW / 101 PS | AEH | SIEMENS | SIMOS3 |
| Seat Leon I (1999 - 2006) | 1.8 20v | 92 kW / 125 PS | APG | BOSCH | ME7.5.5 |
| Seat Leon I (1999 - 2006) | 1.8 20v | 92 kW / 125 PS | AGN | BOSCH | ME7.5.X 29F400 |
| Seat Leon I (1999 - 2006) | 1.8 20v Turbo | 132 kW / 180 PS | AUQ | BOSCH | ME7.X 4Mbit |
| Seat Leon I (1999 - 2006) | 1.8 20v Turbo | 132 kW / 180 PS | ARY | BOSCH | ME7.5.5 |
| Seat Leon I (1999 - 2006) | 1.8 20v Turbo | 132 kW / 180 PS | APP | BOSCH | ME7.5.5 |
| Seat Leon I (1999 - 2006) | 1.8 20v Turbo | 132 kW / 180 PS | AJQ | BOSCH | ME7.5.X 29F400 |
| Seat Leon I (1999 - 2006) | 1.8 20v Turbo Cupra R | 165 kW / 224 PS | BAM | BOSCH | ME7.X 8Mbit |
| Seat Leon I (1999 - 2006) | 1.8 20v Turbo Cupra R | 154 kW / 209 PS | AMK | BOSCH | ME7.X 8Mbit |
| Seat Leon I (1999 - 2006) | 1.9 8v SDI | 50 kW / 68 PS | AQM | BOSCH | EDC15V |
| Seat Leon I (1999 - 2006) | 1.9 8v TDI | 74 kW / 101 PS | AXR | BOSCH | EDC15P+ |
| Seat Leon I (1999 - 2006) | 1.9 8v TDI | 96 kW / 131 PS | ASZ | BOSCH | EDC15P+ |
| Seat Leon I (1999 - 2006) | 1.9 8v TDI | 81 kW / 110 PS | ASV | BOSCH | EDC15V |
| Seat Leon I (1999 - 2006) | 1.9 8v TDI | 110 kW / 150 PS | ARL | BOSCH | EDC15P+ |
| Seat Leon I (1999 - 2006) | 1.9 8v TDI | 66 kW / 90 PS | ALH | BOSCH | EDC15V |
| Seat Leon I (1999 - 2006) | 1.9 8v TDI | 81 kW / 110 PS | AHF | BOSCH | EDC15V |
| Seat Leon I (1999 - 2006) | 1.9 8v TDI | 66 kW / 90 PS | AGR | BOSCH | EDC15V |
| Seat Leon I (1999 - 2006) | 2.8 V6 24v | 150 kW / 204 PS | BDE | BOSCH | ME7.X 8Mbit |
| Seat Leon I (1999 - 2006) | 2.8 V6 24v | 150 kW / 204 PS | AUE | BOSCH | ME7.X 8Mbit |
