Only the first two generations of the Mondeo model with its top modifications had the 2.5-liter Ford SEA or 2.5 Duratec V6 engine, which was manufactured in the USA between 1994 and 1999. The unit, which had a capacity of slightly less than 2.5 liters, took the place of the SEB engine in 1999 in order to comply with the tax.

Internal combustion engines like the SGA, LCB, REBA, and MEBA are also part of the Duratec V6 line.
The engine was installed on:
- Ford Mondeo Mk1 in 1994 – 1996;
- Ford Mondeo Mk2 in 1996 – 1999.
Specifications
| Production years | 1994-1999 |
| Displacement, cc | 2544 |
| Fuel system | distributed injection |
| Power output, hp | 170 |
| Torque output, Nm | 220 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 82.4 |
| Piston stroke, mm | 79.5 |
| Compression ratio | 9.7 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.6 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Ford Mondeo 1998) — city — highway — combined |
13.6 7.1 9.8 |
| Engine lifespan, km | ~300 000 |
Disadvantages of the Ford SEA engine
Although the units in this series are extremely dependable, they are too powerful;
Overheating is the primary cause of motor issues, typically as a result of a pump failure;
Here, fuel pump failure ranks second in frequency;
Regular cleaning of the crankcase ventilation is necessary to prevent the engine from sweating oil;
Poor lubrication is a concern for hydraulic lifters and timing chain tensioners.
