| Mitsubishi 3A9 engine | |
| Manufacturer: | MDC Power |
| Configuration: | Naturally aspirated Straight-3 |
| Production: | 2003–present |
| Block: | Aluminum |
| Head: | Aluminum |
| Fueltype: | Unleaded regular gasoline, Gasohol E10, E20 |
| Fuelsystem: | Fuel injection |
| Coolingsystem: | Water-cooled |
| Valvetrain: | DOHC 4 valves x cyl. with MIVEC |
| Displacement: | 999cc 1124cc 1193cc |
| Bore: | 75mm |
| Stroke: | 75.4mm 84.8mm 90mm |
| Power: | NaN0NaN0 |
| Torque: | NaN0NaN0 |
| Compression: | 10.5:1 |
The Mitsubishi 3A9 engine is a range of all-alloy three cylinder engines from Mitsubishi Motors that were jointly developed with 4A9 engine family. They were introduced in the 2003 version of their Mitsubishi Colt supermini, and built by DaimlerChrysler-owned MDC Power in Germany (previously a joint venture).
For engine family characteristics see 4A9 engine family.
| Displacement | 999cc |
| Bore pitch | 83mm |
| Bore x stroke | NaNmm |
| Peak power | 520NaN0 at 6,000 rpm |
| Peak torque | 880NaN0 at 5,000 rpm |
| Notes | MIVEC |
Also known as the Mercedes-Benz M134 E11.
| Displacement | 1124cc |
| Bore pitch | 83mm |
| Bore x stroke | NaNmm |
| Peak power | 550NaN0 at 6,000 rpm |
| Peak torque | 1000NaN0 at 3,500 rpm |
| Notes | - |
| Displacement | 1193cc |
| Bore pitch | 83mm |
| Bore x stroke | NaNmm |
| Peak power | 570NaN0 at 6,000 rpm |
| Peak torque | 1000NaN0 at 4,000 rpm |
| Notes | MIVEC, gasohol E10, E20 |