The 1.8-liter Suzuki M18A engine was manufactured in China for a few years after being assembled at the company’s plant in Japan from 2001 to 2007 and installed on Aerio for the Asian and Australian markets. For swapping out the M13A or M16A motor, such a power unit is frequently utilized.

M-series engines: M13A, M15A, M16A, and M18A.
Specifications
| Production years | 2001-2007 |
| Displacement, cc | 1796 |
| Fuel system | injector |
| Power output, hp | 125 |
| Torque output, Nm | 170 |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 83 |
| Piston stroke, mm | 83 |
| Compression ratio | 9.6 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain |
| Phase regulator | at the intake |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.5 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Suzuki Aerio 2005) — city — highway — combined |
10.5 7.1 8.3 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | 102 (without attachments) |
The engine was installed on:
- Suzuki Aerio 1 (ER) in 2001 – 2007;
- Suzuki Liana 1 (ER) in 2004 – 2007.
Disadvantages of the Suzuki M18A engine
Owners of cars with such engines typically complain about excessive lubricant usage.
The motor frequently breaks through the cylinder head gasket while also overheating quite quickly.
A dirty throttle or EGR valve is typically the cause of floating engine speeds.
The unit’s short-lived supports and troublesome sensors are additional flaws.
Antifreeze will combine with oil and liners may sag at high mileage.
