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1.0 EcoBoost vs 1.0, 1.4 and 1.6 8v EA111: which engine is more reliable?

According to our risk index, the 1.0, 1.4 and 1.6 8v EA111 carries less risk than the 1.0 EcoBoost: 50/100 versus 71/100 (both high risk). The 1.0 EcoBoost has 3 documented serious faults, the main one being «Degradation of the timing belt running in oil»; the 1.0, 1.4 and 1.6 8v EA111 has 2 documented serious faults, the main one being «Engine noise and premature wear from lubrication in the 1.0 VHT».

Risk index

1.0 EcoBoost

71

High risk · 3 serious faults

Risk index

1.0, 1.4 and 1.6 8v EA111

50

High risk · 2 serious faults

Lower risk

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

27 sourcesHow we work

Is the 1.0 EcoBoost reliable?

It is a turbocharged direct-injection three-cylinder that has won Engine of the Year several times, but it has two very well-documented weak points: two belts running in oil (timing and oil pump) that can disintegrate and seize the engine, and cases of coolant leaks and overheating in early units. It is best bought with a service history and the belts checked or replaced on time.[1][2][3][4]

See the 4 of the 1.0 EcoBoost faults

Is the 1.0, 1.4 and 1.6 8v EA111 reliable?

Eight-valve petrol engines, simple, with a timing belt. For the European 1.0 and 1.4, sources only record isolated incidents, mainly ignition faults in damp weather on the 1.4. In Brazil, the 2008-2010 1.0 VHT of the Gol, Voyage and Fox suffered lubrication-related noise, an oil campaign with extended warranty and a software recall in 2009.[5][6][7][8]

See the 4 of the 1.0, 1.4 and 1.6 8v EA111 faults

Side-by-side comparison

Comparison of 1.0 EcoBoost and 1.0, 1.4 and 1.6 8v EA111
1.0 EcoBoost1.0, 1.4 and 1.6 8v EA111
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement999 cm³—
TimingWet belt (belt-in-oil)Timing belt (dry)
Power100–155 hp50–104 hp
Productionsince 2012[1][9][10][11]1991–2022[12][13][14][15]
Reliability
Risk index (what is it?)71High risk50High risk
Documented faults44
Of high or critical severity32
Worst severityCritical severityCritical severity
Main faults
  1. Critical severity: Degradation of the timing belt running in oil
  2. Critical severity: Oil pump belt and tensioner failure
  3. Critical severity: Coolant leaks and overheating from the turbo hose
  1. High severity: Engine noise and premature wear from lubrication in the 1.0 VHT
  2. Critical severity: Hard cold starting and software update for the 2009-2010 1.0
  3. Medium severity: Thermostat, housing and water pump of the cooling circuit
Most expensive documented repairup to €1,200Degradation of the timing belt running in oilPublished figure[2]No reliable data
Which versions to buy
BuyRecommended versionsNone
  • 1.0 8v 50 hp (AER, ALD, ALL, ANV, AUC; 1996-2005)[16][17]
With cautionVersions to be cautious about
  • 1.0 EcoBoost 100/125 (Fox, 2012-2017)[2][3][18]
  • 1.0 EcoBoost 100/125/140 with cylinder deactivation (from ~2017)[19][20]
  • 1.0 EcoBoost Hybrid 48V mild hybrid (125/155 hp, from 2019)[1][21]
  • 1.4 8v 55-60 hp (ABD, AKP, AEX, AKV, APQ, ANX, ANW; 1991-2005)[7][8]
  • 1.0 8v Mi and Total Flex (Brazilian EA-111, 1997-2008)[5][22][23][24]
  • 1.0 8v VHT flex (EA-111, 2008-2022)[5][22][25][26]
  • 1.6 8v Total Flex (Brazilian EA-111, 2003-2022)[22][27]
AvoidVersions to avoidNoneNone

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

1.0 EcoBoost

See the 12 models with the 1.0 EcoBoost

1.0, 1.4 and 1.6 8v EA111

See the 9 models with the 1.0, 1.4 and 1.6 8v EA111

Other comparisons

With the 1.0 EcoBoost

With the 1.0, 1.4 and 1.6 8v EA111

Compare other engines

That is the comparison you are viewing: change one of the two engines.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Ford EcoBoost engineWikipedia · Other source · consulted 26 September 2026
  2. Alerta Ford: la correa de distribución del 1.0 EcoBoost puede romper el motor y la NHTSA ya investigaMotor16 · Motoring press · consulted 26 September 2026 · in Spanish
  3. Los Ford 1.0 EcoBoost tricilíndricos están dando problemas de correas bañadas que recuerdan al caso PureTechMotor.es · Motoring press · consulted 26 September 2026 · in Spanish
  4. Gripa el motor por problema en el manguito se queda sin refrigeranteOpinautos · Owners' forum · consulted 26 September 2026 · in Spanish
  5. A VW e o problema dos motores 1.0Motorshow · Motoring press · published 1 December 2009 · consulted 2 November 2026 · in Portuguese
  6. Volkswagen faz recall do novo Gol, Voyage e Fox 1.0Vrum · Motoring press · published 17 August 2009 · consulted 2 November 2026 · in Portuguese
  7. Fiabilité Volkswagen Polo III (1994-2001) - pannes moteur, boîte...Fiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  8. Volkswagen Polo III: averías notificadas por los usuariosAutoCentrum.pl · Owners' forum · consulted 2 November 2026 · in another language
  9. Prueba: Ford Fiesta 1.0 EcoBoost 100 CV (2013)km77 · Motoring press · consulted 26 September 2026 · in Spanish
  10. Ford Mondeo Berlina Trend 1.0 EcoBoost 92 kW (125 CV) (2015-2018): precio y ficha técnicakm77 · Technical documentation · consulted 26 September 2026 · in Spanish
  11. Ford B-MAX Trend 1.0 EcoBoost 100 CV (2012-2018): precio y ficha técnicakm77 · Technical documentation · consulted 26 September 2026 · in Spanish
  12. List of discontinued Volkswagen Group petrol enginesWikipedia (en) · Other source · consulted 2 November 2026
  13. VW Golf IIIWikipedia (de) · Other source · consulted 2 November 2026 · in German
  14. Volkswagen GolWikipedia (pt) · Other source · consulted 2 November 2026 · in Portuguese
  15. Troca de bomba d'água e correia de sincronismo do Gol G5 EA111Revista O Mecânico · Motoring press · published 7 March 2025 · consulted 2 November 2026 · in Portuguese
  16. Fiabilité Volkswagen Lupo (1998-2005) - pannes moteur, boîte...Fiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  17. Volkswagen Lupo (1998–2005): opiniones por motorizaciónAutoCentrum.pl · Owners' forum · consulted 2 November 2026 · in another language
  18. Ford EcoBoost engines: reliability, problems and should you buy one?Carbuyer · Motoring press · consulted 26 September 2026
  19. Ford's Self-Clogging 1.0-Liter EcoBoost Engine Is Finally Getting RecalledThe Drive · Motoring press · consulted 26 September 2026
  20. The Largest Ford EcoBoost Recalls In 15 Years Of ProductionCarBuzz · Motoring press · consulted 26 September 2026
  21. Stellantis no es el único afectado por la correa de distribución bañada en aceiteAutofácil · Motoring press · consulted 26 September 2026 · in Spanish
  22. Justiça do RS determina recall de 400 mil veículos da VolkswagenOlhar Direto (con G1) · General press · published 13 January 2013 · consulted 2 November 2026 · in Portuguese
  23. Substituição de bobina, cabos e velas de ignição do Volkswagen Fox 1.0Revista O Mecânico · Motoring press · published 1 December 2025 · consulted 2 November 2026 · in Portuguese
  24. Volkswagen Gol: os 5 maiores defeitos crônicos do queridinho do BrasilVrum · Motoring press · published 9 April 2026 · consulted 2 November 2026 · in Portuguese
  25. Mais um recall e mais uma marca colocada à provaMecânica Online · Motoring press · published 1 November 2009 · consulted 2 November 2026 · in Portuguese
  26. Tribunal revoga recall para Gol, Voyage e FoxiCarros · Motoring press · published 16 January 2013 · consulted 2 November 2026 · in Portuguese
  27. Este é o motor Volkswagen que consumia mais óleo que gasolinaClick Petróleo e Gás · General press · published 12 June 2025 · consulted 2 November 2026 · in Portuguese