| A3 2.0 FSIHatchback | 2003 – 2008 | 2.0L BMB | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 FSIHatchback | 2003 – 2008 | 2.0L BLX | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 FSIHatchback | 2003 – 2008 | 2.0L AXW | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 FSIHatchback | 2003 – 2008 | 2.0L BLY | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 FSIHatchback | 2003 – 2008 | 2.0L BVY | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 FSIHatchback | 2003 – 2008 | 2.0L BVZ | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 FSIHatchback | 2003 – 2008 | 2.0L BLR | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 1.6Hatchback | 2003 – 2012 | 1.6L BGU | 102 hp (75 kW) | Petrol | Front-Wheel Drive |
| A3 1.6Hatchback | 2003 – 2012 | 1.6L BSF | 102 hp (75 kW) | Petrol | Front-Wheel Drive |
| A3 1.6Hatchback | 2003 – 2012 | 1.6L BSE | 102 hp (75 kW) | Petrol | Front-Wheel Drive |
| A3 1.6Hatchback | 2003 – 2012 | 1.6L CCSA | 102 hp (75 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 TDI 16VHatchback | 2003 – 2012 | 2.0L BKD | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TDI 16VHatchback | 2003 – 2012 | 2.0L CBAB | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TDI 16VHatchback | 2003 – 2012 | 2.0L CLJA | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TDI 16VHatchback | 2003 – 2012 | 2.0L CFFB | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TDI 16VHatchback | 2003 – 2012 | 2.0L CBEA | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 1.9 TDIHatchback | 2003 – 2010 | 1.9L BKC | 105 hp (77 kW) | Diesel | Front-Wheel Drive |
| A3 1.9 TDIHatchback | 2003 – 2010 | 1.9L BLS | 105 hp (77 kW) | Diesel | Front-Wheel Drive |
| A3 1.9 TDIHatchback | 2003 – 2010 | 1.9L BXE | 105 hp (77 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TDIHatchback | 2003 – 2012 | 2.0L AZV | 136 hp (100 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TDIHatchback | 2003 – 2012 | 2.0L CBAA | 136 hp (100 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TDIHatchback | 2003 – 2012 | 2.0L CFFA | 136 hp (100 kW) | Diesel | Front-Wheel Drive |
| A3 3.2 V6 quattroHatchback | 2003 – 2009 | 3.2L BDB | 250 hp (184 kW) | Petrol | All-wheel Drive |
| A3 3.2 V6 quattroHatchback | 2003 – 2009 | 3.2L BMJ | 250 hp (184 kW) | Petrol | All-wheel Drive |
| A3 3.2 V6 quattroHatchback | 2003 – 2009 | 3.2L BUB | 250 hp (184 kW) | Petrol | All-wheel Drive |
| A3 1.6 FSIHatchback | 2003 – 2007 | 1.6L BAG | 115 hp (85 kW) | Petrol | Front-Wheel Drive |
| A3 1.6 FSIHatchback | 2003 – 2007 | 1.6L BLP | 115 hp (85 kW) | Petrol | Front-Wheel Drive |
| A3 1.6 FSIHatchback | 2003 – 2007 | 1.6L BLF | 115 hp (85 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 1.6Hatchback | 2004 – 2013 | 1.6L | 102 hp (75 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 1.9 TDIHatchback | 2004 – 2010 | 1.9L BKC | 105 hp (77 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 1.9 TDIHatchback | 2004 – 2010 | 1.9L BLS | 105 hp (77 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 1.9 TDIHatchback | 2004 – 2010 | 1.9L BXE | 105 hp (77 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 1.6 FSIHatchback | 2004 – 2007 | 1.6L | 115 hp (85 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 FSIHatchback | 2004 – 2008 | 2.0L | 150 hp (110 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 3.2 V6 quattroHatchback | 2004 – 2009 | 3.2L | 250 hp (184 kW) | Petrol | All-wheel Drive |
| A3 Sportback 2.0 TDI 16VHatchback | 2004 – 2013 | 2.0L BKD | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 2.0 TDI 16VHatchback | 2004 – 2013 | 2.0L CBAB | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 2.0 TDI 16VHatchback | 2004 – 2013 | 2.0L CLJA | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 2.0 TDI 16VHatchback | 2004 – 2013 | 2.0L CFFB | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 2.0 TDI 16VHatchback | 2004 – 2013 | 2.0L CBEA | 140 hp (103 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 2.0 TFSIHatchback | 2004 – 2013 | 2.0L AXX | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 TFSIHatchback | 2004 – 2013 | 2.0L BWA | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 TFSIHatchback | 2004 – 2013 | 2.0L BPY | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 TFSIHatchback | 2004 – 2013 | 2.0L CAWB | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 TFSIHatchback | 2004 – 2013 | 2.0L CCZA | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 TFSIHatchback | 2004 – 2013 | 2.0L CBFA | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 TFSIHatchback | 2004 – 2013 | 2.0L CCTA | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 Sportback 2.0 TFSI quattroHatchback | 2004 – 2013 | 2.0L AXX | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 Sportback 2.0 TFSI quattroHatchback | 2004 – 2013 | 2.0L BWA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 Sportback 2.0 TFSI quattroHatchback | 2004 – 2013 | 2.0L BPY | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 Sportback 2.0 TFSI quattroHatchback | 2004 – 2013 | 2.0L CCZA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 Sportback 2.0 TFSI quattroHatchback | 2004 – 2013 | 2.0L CBFA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 Sportback 2.0 TFSI quattroHatchback | 2004 – 2013 | 2.0L CCTA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 2.0 TDI quattroHatchback | 2003 – 2008 | 2.0L AZV | 136 hp (100 kW) | Diesel | All-wheel Drive |
| A3 Sportback 2.0 TDIHatchback | 2004 – 2013 | 2.0L AZV | 136 hp (100 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 2.0 TDIHatchback | 2004 – 2013 | 2.0L CBAA | 136 hp (100 kW) | Diesel | Front-Wheel Drive |
| A3 Sportback 2.0 TDIHatchback | 2004 – 2013 | 2.0L CFFA | 136 hp (100 kW) | Diesel | Front-Wheel Drive |
| A3 2.0 TFSIHatchback | 2004 – 2012 | 2.0L AXX | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 TFSIHatchback | 2004 – 2012 | 2.0L BWA | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 TFSIHatchback | 2004 – 2012 | 2.0L CAWB | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 TFSIHatchback | 2004 – 2012 | 2.0L CCZA | 200 hp (147 kW) | Petrol | Front-Wheel Drive |
| A3 2.0 TFSI quattroHatchback | 2004 – 2012 | 2.0L AXX | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 2.0 TFSI quattroHatchback | 2004 – 2012 | 2.0L BWA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 2.0 TFSI quattroHatchback | 2004 – 2012 | 2.0L CCZA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 2.0 TFSI quattroHatchback | 2004 – 2012 | 2.0L CBFA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 2.0 TFSI quattroHatchback | 2004 – 2012 | 2.0L CCTA | 200 hp (147 kW) | Petrol | All-wheel Drive |
| A3 2.0 TDI 16V quattroHatchback | 2004 – 2012 | 2.0L BKD | 140 hp (103 kW) | Diesel | All-wheel Drive |
| A3 2.0 TDI 16V quattroHatchback | 2004 – 2012 | 2.0L CBAB | 140 hp (103 kW) | Diesel | All-wheel Drive |
| A3 2.0 TDI 16V quattroHatchback | 2004 – 2012 | 2.0L CFFB | 140 hp (103 kW) | Diesel | All-wheel Drive |