EcoBoost 1.0 (pre-2018) vs Sigma 1.25

Side-by-side reliability comparison

Higher reliability score
Sigma 1.25 BUY 78/100
+30 points over EcoBoost 1.0 (pre-2018)
0 / 100
CAUTION EcoBoost 1.0 (pre-2018) Ford
0 / 100
BUY Sigma 1.25 Ford

Specifications

EcoBoost 1.0 (pre-2018)
Sigma 1.25
Brand
Ford
Ford
Verdict
CAUTION
BUY
Reliability
48
78
Years
2012--2018
1996--2017
Displacement
999 cc
1242 cc
Layout
I3
I4
Type
Petrol Turbo
Petrol Na
Power
100--140 hp
60--82 hp
Known Issues
2
1
Total Risk Cost
€2,500--€7,500
€50--€150

Character

EcoBoost 1.0 (pre-2018)

"Coolant leaking into cylinders = potential catastrophic failure. Head gasket/degas bottle design flaw. Check coolant level obsessively."

Sigma 1.25

"Fiesta/Ka. Simple Yamaha co-developed engine. Timing chain (good). Reliable. Low power. Thermostat housing. Coil pack. Perfect first car/city car engine."

Issues Comparison

EcoBoost 1.0 (pre-2018) 2

◆ CRITICAL
Wet timing belt — catastrophic failure risk €2,000--€6,000 50,000 km--120,000 km
▲ HIGH
Coolant hose failure — head gasket risk €500--€1,500 50,000 km--100,000 km

Sigma 1.25 1

○ MINOR
Thermostat housing crack €50--€150 60,000 km--120,000 km

Models

EcoBoost 1.0 (pre-2018) 5

Mondeo Mk5 (CD391) 2015--2022 Focus Mk3 (DYB) 2012--2018 Focus Mk3 (DYB) 2012--2018 Fiesta 1.0 EcoBoost JA8 2012--2018 Hatchback Focus 1.0 EcoBoost DYB 2012--2018 Hatchback

Sigma 1.25 3

Fiesta Mk6 (JD/JH) 2002--2008 Fiesta Mk7 (JA8) 2008--2017 Fiesta Mk7 (JA8) 2008--2017
Full EcoBoost 1.0 (pre-2018) Report Full Sigma 1.25 Report