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1.4 / 1.6 16v E-TEC II vs 1.0 VVT-i: which engine is more reliable?

According to our risk index, the 1.4 / 1.6 16v E-TEC II carries less risk than the 1.0 VVT-i: 19/100 (low risk) versus 35/100 (moderate risk). The 1.4 / 1.6 16v E-TEC II has no documented serious faults; the 1.0 VVT-i has 1 documented serious fault, the main one being «2010 recall for the accelerator pedal».

Risk index

1.4 / 1.6 16v E-TEC II

19

Low risk · 0 serious faults

Lower risk

Risk index

1.0 VVT-i

35

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

18 sourcesHow we work

Is the 1.4 / 1.6 16v E-TEC II reliable?

The 1.4 and 1.6 16v GM Daewoo E-TEC II (first-generation Lacetti/Optra and Aveo) have a timing belt and, according to the Polish press, a moderate fault record. Documented issues are faulty valves in the first units (2004-2005), lambda sensor faults and a few cases of oil leaks or oil consumption.[1][2][3]

See the 3 of the 1.4 / 1.6 16v E-TEC II faults

Is the 1.0 VVT-i reliable?

Yes, broadly speaking: the 1.0 VVT-i (1KR-FE) that Toyota fits to the Aygo and iQ, and shares with the Citroën C1 and Peugeot 107/108, is one of the most reliable petrol engines in its segment. There is no documented pattern of oil consumption or of cylinder head or exhaust gasket problems; its most cited faults are clutch wear and water pump leaks, especially in first-generation cars (2005-2014).[4][5][6][7][8]

See the 6 of the 1.0 VVT-i faults

Side-by-side comparison

Comparison of 1.4 / 1.6 16v E-TEC II and 1.0 VVT-i
1.4 / 1.6 16v E-TEC II1.0 VVT-i
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement—998 cm³
TimingTiming belt (dry)Chain
Power83–109 hp67–72 hp
Production2004–2011[9][10][11][12][13]2004–2022[4][5][14][15][16][17]
Reliability
Risk index (what is it?)19Low risk35Moderate risk
Documented faults36
Of high or critical severity01
Worst severityMedium severityHigh severity
Main faults
  1. Medium severity: Faulty valves and ignition faults in the first units (2004-2005)
  2. Low severity: Lambda sensor faults
  3. Low severity: Oil consumption and oil leaks
  1. Medium severity: Premature clutch wear
  2. Medium severity: Coolant leak from the water pump
  3. High severity: 2010 recall for the accelerator pedal
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • 1.4 and 1.5 8v SOHC (Aveo, 2005-2011)[3][13]
  • 1.0 VVT-i 67-69 hp (1KR-FE, 2005-2018)[6][7][8]
  • 1.0 VVT-i 71-72 hp (1KR-FE, 2018-2022)[7][8]
With cautionVersions to be cautious about
  • 1.4 16v DOHC 95-101 hp (F14D4/L95, 2004-2011)[1][2][13]
  • 1.6 16v DOHC 103-109 hp (L91/LXT, 2004-2011)[2][13][18]
None
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

Other comparisons

With the 1.4 / 1.6 16v E-TEC II

With the 1.0 VVT-i

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. Chevrolet Lacetti 1.4 16V - Niełatwo zdobyć zaufanieAuto Świat · Motoring press · published 19 November 2007 · consulted 2 November 2026 · in another language
  2. Bez fajerwerków - Chevrolet Lacetti (2003-2010)AutoCentrum.pl · Motoring press · published 7 April 2012 · consulted 2 November 2026 · in another language
  3. Czy warto kupić: używany Chevrolet Aveo (od 2002 do 2011)AutoCentrum.pl · Motoring press · published 5 March 2013 · consulted 2 November 2026 · in another language
  4. Toyota AygoWikipedia · Other source · consulted 27 September 2026
  5. Citroën C1Wikipedia · Other source · consulted 27 September 2026
  6. Fiabilité de la marque Toyota (Aygo)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  7. Fiabilité de la marque Citroën (C1)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  8. Fiabilité de la marque Peugeot (107/108)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  9. GM Family 1 engineWikipedia · Other source · consulted 2 November 2026
  10. Chevrolet LacettiWikipedia · Other source · consulted 2 November 2026
  11. Chevrolet LacettiWikipedia (de) · Other source · consulted 2 November 2026 · in German
  12. Chevrolet Aveo (T200)Wikipedia · Other source · consulted 2 November 2026
  13. Używany Chevrolet Aveo T200/T250 - typowe awarie i problemyWP Autokult · Motoring press · published 28 January 2012 · consulted 2 November 2026 · in another language
  14. Toyota KR engineWikipedia · Other source · consulted 27 September 2026
  15. Toyota iQWikipedia · Other source · consulted 27 September 2026
  16. Peugeot 107Wikipedia · Other source · consulted 27 September 2026
  17. Peugeot 108Wikipedia · Other source · consulted 27 September 2026
  18. W pierwszych silnikach 1,6 l przecierały się zawory (Chevrolet Lacetti)AutoCentrum.pl (usterki) · Owners' forum · consulted 2 November 2026 · in another language