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1.4 / 1.6 16v E-TEC II vs 1.33 Dual 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 1.33 Dual VVT-i: 19/100 (low risk) versus 54/100 (high risk). The 1.4 / 1.6 16v E-TEC II has no documented serious faults; the 1.33 Dual VVT-i has 1 documented serious fault, the main one being «Excessive oil consumption from piston wear».

Risk index

1.4 / 1.6 16v E-TEC II

19

Low risk · 0 serious faults

Lower risk

Risk index

1.33 Dual VVT-i

54

High risk · 1 serious fault

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

14 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 1.33 Dual VVT-i reliable?

Yes, with caveats: the 1.33 Dual VVT-i (1NR-FE) is a simple naturally aspirated engine, with no turbo or DPF, and a timing chain. Units built before 2013 carry a factory defect in the pistons, acknowledged by Toyota in a technical bulletin, that sends oil consumption soaring and can end in engine replacement; Toyota corrected it from 2013. We found no specific pattern of water pump or sensor faults; keep an eye on the clutch, manual or with the MMT gearbox.[4][5][6]

See the 3 of the 1.33 Dual VVT-i faults

Side-by-side comparison

Comparison of 1.4 / 1.6 16v E-TEC II and 1.33 Dual VVT-i
1.4 / 1.6 16v E-TEC II1.33 Dual VVT-i
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement—1,329 cm³
TimingTiming belt (dry)Chain
Power83–109 hp97–105 hp
Production2004–2011[7][8][9][10][11]since 2008[4][12][13]
Reliability
Risk index (what is it?)19Low risk54High risk
Documented faults33
Of high or critical severity01
Worst severityMedium severityCritical 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. Critical severity: Excessive oil consumption from piston wear
  2. Medium severity: Hard cold starting and fault code P1604
  3. Medium severity: Premature clutch wear and MMT gearbox actuator faults
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][11]
  • 1.33 Dual VVT-i (1NR-FE, revised pistons and rings, from 2013)[6]
With cautionVersions to be cautious about
  • 1.4 16v DOHC 95-101 hp (F14D4/L95, 2004-2011)[1][2][11]
  • 1.6 16v DOHC 103-109 hp (L91/LXT, 2004-2011)[2][11][14]
  • 1.33 Dual VVT-i (1NR-FE, first series, 2008-2013)[5]
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 1.33 Dual 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 NR engineWikipedia · Other source · consulted 27 September 2026
  5. Toyota 1.33 1NR-FE: Typische Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  6. Toyota Yaris III (XP13) – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published August 2023 · consulted 27 September 2026 · in German
  7. GM Family 1 engineWikipedia · Other source · consulted 2 November 2026
  8. Chevrolet LacettiWikipedia · Other source · consulted 2 November 2026
  9. Chevrolet LacettiWikipedia (de) · Other source · consulted 2 November 2026 · in German
  10. Chevrolet Aveo (T200)Wikipedia · Other source · consulted 2 November 2026
  11. Używany Chevrolet Aveo T200/T250 - typowe awarie i problemyWP Autokult · Motoring press · published 28 January 2012 · consulted 2 November 2026 · in another language
  12. Toyota istWikipedia · Other source · consulted 27 September 2026
  13. Toyota iQWikipedia · Other source · consulted 27 September 2026
  14. W pierwszych silnikach 1,6 l przecierały się zawory (Chevrolet Lacetti)AutoCentrum.pl (usterki) · Owners' forum · consulted 2 November 2026 · in another language