From 1997 to 2004, the company’s factories produced the 2.0-liter Mazda FS-DE engine, which was fitted to popular models like the Premacy, Protege, Capella, Familia, 323, and 626. A 170-hp turbo version of this engine with index FS-DET was available in the US market.

F6, FP, FP-DE, F8, FE, FE-DE, FE3N, FS, FS-DE, FS-ZE, and F2 are all members of the F-engine family.
The engine was mounted on:
- Mazda 323 BJ in 2000 – 2003;
- Mazda 626 GF in 1997 – 2002;
- Mazda Capella GF in 1997 – 2002;
- Mazda Capella GW in 1997 – 2002;
- Mazda Familia BJ in 2000 – 2004;
- Mazda MPV LW in 1999 – 2002;
- Mazda Premacy CP in 1999 – 2004;
- Mazda Protege BJ in 2000 – 2003;
- Kia Carens 1 (RS) in 1999 – 2006.
Specifications
| Production years | 1997-2004 |
| Displacement, cc | 1991 |
| Fuel system | distributed injection |
| Power output, hp | 115 – 140 |
| Torque output, Nm | 170 – 185 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 83 |
| Piston stroke, mm | 92 |
| Compression ratio | 9.1 – 9.7 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 3.5 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Mazda 626 1998) — city — highway — combined |
10.8 6.5 8.0 |
| Engine lifespan, km | ~450 000 |
| Weight, kg | 137.5 |
Disadvantages of the Mazda FS-DE engine
This motor has a good resource and is renowned for its simplicity and dependability;
A new head is costly, the engine should not overheat, and the head drives quickly;
The power units in this series frequently use oil after 150,000 kilometers of operation;
There are no hydraulic lifters, and valve clearances must be changed every 100,000 kilometers. The timing belt is changed every 60,000 kilometers, but when it breaks, the valves do not bend.
