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

According to our risk index, the 1.4 and 1.6 16v carries less risk than the 1.6 EcoBoost: 45/100 (moderate risk) versus 59/100 (high risk). The 1.6 EcoBoost has 3 documented serious faults, the main one being «Cracked cylinder head from overheating, with fire risk»; the 1.4 and 1.6 16v has 1 documented serious fault, the main one being «Timing belt breakage or premature failure».

Risk index

1.6 EcoBoost

59

High risk · 3 serious faults

Risk index

1.4 and 1.6 16v

45

Moderate risk · 1 serious fault

Lower risk

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

20 sourcesHow we work

Is the 1.6 EcoBoost reliable?

It is a turbocharged direct-injection four-cylinder that Ford used between 2010 and 2018 as a mid-range step across much of its European line-up, and which Volvo sold under its own T3/T4 designations. Its most serious fault is overheating caused by a loss of coolant circulation that can crack the cylinder head and cause a fire: Ford has recalled cars in South Africa and in the US/Canada, although we have not confirmed an equivalent campaign in Spain.[1][2][3]

See the 4 of the 1.6 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.[4][5][6][7]

See the 6 of the 1.4 and 1.6 16v faults

Side-by-side comparison

Comparison of 1.6 EcoBoost and 1.4 and 1.6 16v
1.6 EcoBoost1.4 and 1.6 16v
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,596 cm³—
TimingTiming belt (dry)Timing belt (dry)
Power120–200 hp75–135 hp
Production2010–2019[1][8]since 1998[9][10][11]
Reliability
Risk index (what is it?)59High risk45Moderate risk
Documented faults46
Of high or critical severity31
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Cracked cylinder head from overheating, with fire risk
  2. High severity: Coolant loss from hoses, water pump or expansion tank
  3. High severity: Premature turbocharger failure
  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)[7][12]
With cautionVersions to be cautious about
  • 1.6 EcoBoost 120/150/160/182 (Ford, 2010-2019)[3][13][14]
  • 1.6 EcoBoost ST 182/197/200 (Ford Fiesta ST/ST200, 2013-2017)[1][15]
  • Volvo T3/T4 1.6 (B4164T3/B4164T/B4164T2, 2010-2018)[16]
  • 1.4 16V 75-100 hp (K4J, 1999-2012)[17][18]
  • 1.6 16V 110-135 hp with variable valve timing unit (K4M, 1998-2020)[6][19][20]
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

1.6 EcoBoost

See the 11 models with the 1.6 EcoBoost

1.4 and 1.6 16v

See the 13 models with the 1.4 and 1.6 16v

Other comparisons

With the 1.6 EcoBoost

With the 1.4 and 1.6 16v

Compare other engines

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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 27 September 2026
  2. The Largest Ford EcoBoost Recalls In 15 Years Of ProductionCarBuzz · Motoring press · consulted 27 September 2026
  3. Ford KugaWikipedia · Other source · consulted 27 September 2026
  4. Fiabilité et pannes de la Renault Mégane 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  5. Fiabilité et pannes du Renault Scénic 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  6. Fiabilité et pannes de la Renault Laguna 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  7. Fiabilité et pannes du Dacia Duster 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  8. Volvo S60Wikipedia · Other source · consulted 27 September 2026
  9. Renault K-Type engineWikipedia (inglés) · Other source · consulted 27 September 2026
  10. Moteur K RenaultWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  11. Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  12. Fiabilité et pannes du Dacia Logan 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  13. Fiabilité et pannes Ford Mondeo 3Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
  14. Fiabilité et pannes Ford S-MaxFiches-auto.fr · Other source · consulted 27 September 2026 · in French
  15. Ford Fiesta STWikipedia · Other source · consulted 27 September 2026
  16. Fiabilité et pannes Volvo S60Fiches-auto.fr · Other source · consulted 27 September 2026 · in French
  17. Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  18. Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  19. Fiabilité et pannes de la Renault Mégane 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  20. Fiabilité et pannes du Renault Scénic 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French