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2.0 EcoBoost vs 1.4 and 1.6 16v: which engine is more reliable?

According to our risk index, the 2.0 EcoBoost carries less risk than the 1.4 and 1.6 16v: 38/100 versus 45/100 (both moderate risk). The 2.0 EcoBoost has 1 documented serious fault, the main one being «Coolant entering the cylinders through block cracks»; the 1.4 and 1.6 16v has 1 documented serious fault, the main one being «Timing belt breakage or premature failure».

Risk index

2.0 EcoBoost

38

Moderate risk · 1 serious fault

Lower risk

Risk index

1.4 and 1.6 16v

45

Moderate risk · 1 serious fault

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

24 sourcesHow we work

Is the 2.0 EcoBoost reliable?

This is the direct-injection turbo 2.0 that Ford fitted from 2010 to the Mondeo, S-Max, Galaxy, Kuga and Focus ST, and that Volvo, Land Rover and Jaguar also used. Its most serious weak point is cracks in the block that let coolant into the cylinders (a Ford bulletin in North America; cited for the Mondeo and Kuga); we have not found a European recall.[1][2][3][4]

See the 3 of the 2.0 EcoBoost faults

Is the 1.4 and 1.6 16v reliable?

The K4J (1.4) and K4M (1.6), both naturally aspirated 16-valve units, are simple and generally reliable petrol engines: no source consulted documents oil consumption or faults that destroy the block. Their most-cited weak point is the ignition coils, followed by the crankshaft sensor and, on versions with a variable valve timing unit, its pulley; a neglected belt can cause serious damage, as one case in the Renault Laguna II documents.[5][6][7][8]

See the 6 of the 1.4 and 1.6 16v faults

Side-by-side comparison

Comparison of 2.0 EcoBoost and 1.4 and 1.6 16v
2.0 EcoBoost1.4 and 1.6 16v
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,999 cm³—
TimingChainTiming belt (dry)
Power203–250 hp75–135 hp
Production2010–2018[9][10]since 1998[11][12][13]
Reliability
Risk index (what is it?)38Moderate risk45Moderate risk
Documented faults36
Of high or critical severity11
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Coolant entering the cylinders through block cracks
  2. Medium severity: Carbon build-up on injectors and intake valves from direct injection
  3. Medium severity: Turbo faults: sensor, pressure solenoid and noise
  1. Medium severity: Ignition coil failure
  2. High severity: Timing belt breakage or premature failure
  3. Medium severity: Crankshaft position sensor failure
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNone
  • 1.6 16V 105-110 hp Dacia, without variable valve timing unit (K4M, 2004-2020)[8][14]
With cautionVersions to be cautious about
  • 2.0 EcoBoost 203/240 hp (Mondeo IV, S-Max I and Galaxy II, 2010-2014)[1][15]
  • 2.0 EcoBoost 203/240 hp (Mondeo V, S-Max II and Galaxy III, 2014-2018)[1][2][16]
  • 2.0 EcoBoost ST 250 hp (Focus ST, 2012-2018)[15][17][18]
  • 2.0 EcoBoost 242 hp 4x4 (Kuga II, 2017-2018)[1][3]
  • Volvo 2.0T 203 hp and T5 240 hp (B4204T6 and B4204T7, 2010-2013)[9][19]
  • Land Rover and Jaguar Si4 240 hp (Evoque, Freelander 2, Discovery Sport and XF, 2011-2016)[20]
  • 1.4 16V 75-100 hp (K4J, 1999-2012)[21][22]
  • 1.6 16V 110-135 hp with variable valve timing unit (K4M, 1998-2020)[7][23][24]
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

2.0 EcoBoost

See the 17 models with the 2.0 EcoBoost

1.4 and 1.6 16v

See the 13 models with the 1.4 and 1.6 16v

Other comparisons

With the 2.0 EcoBoost

With the 1.4 and 1.6 16v

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. TSB 19-2346: 2.0L EcoBoost - Coolant In Cylinders, White Exhaust Smoke And/Or Illuminated MILFord Motor Company · Manufacturer · published 19 December 2019 · consulted 2 November 2026
  2. Ford Mondeo: Probleme, Krankheiten und Rückrufe (Mondeo MK5)Gebrauchtwagenberater.de · Other source · consulted 2 November 2026 · in German
  3. Ford Kuga: Probleme, Krankheiten und Kaufberatung (Kuga MK2)Gebrauchtwagenberater.de · Other source · consulted 2 November 2026 · in German
  4. Ford Mondeo (2010 – 2014): engine fire (código Ford 17S09)car-recalls.eu · Other source · published October 2021 · consulted 2 November 2026
  5. Fiabilité et pannes de la Renault Mégane 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  6. Fiabilité et pannes du Renault Scénic 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  7. Fiabilité et pannes de la Renault Laguna 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  8. Fiabilité et pannes du Dacia Duster 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  9. Ford EcoBoost engineWikipedia · Other source · consulted 2 November 2026
  10. Ford Focus (third generation)Wikipedia · Other source · consulted 2 November 2026
  11. Renault K-Type engineWikipedia (inglés) · Other source · consulted 27 September 2026
  12. Moteur K RenaultWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  13. Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  14. Fiabilité et pannes du Dacia Logan 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  15. Ford EcoBoost Probleme (2.0 und 2.3)Carwiki.de · Other source · consulted 2 November 2026 · in German
  16. Ford Mondeo (tabla de motores del Mondeo V)Wikipedia · Other source · consulted 2 November 2026 · in Spanish
  17. Used Ford Focus ST (Mk3, 2012-2019) review and buyer's guideAuto Express · Motoring press · consulted 2 November 2026
  18. Fiabilité et pannes Ford Focus 3 (2011-2018)Fiches-auto.fr · Other source · consulted 2 November 2026 · in French
  19. Volvo V60 I (2010 – 2018) – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Other source · consulted 2 November 2026 · in German
  20. Fiabilité et pannes Land Rover Range Rover Evoque (2011-2018)Fiches-auto.fr · Other source · consulted 2 November 2026 · in French
  21. Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  22. Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  23. Fiabilité et pannes de la Renault Mégane 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  24. Fiabilité et pannes du Renault Scénic 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French