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1.0 T3 and 1.3 T4 FireFly Turbo vs 1.4 / 1.6 16v E-TEC II: which engine is more reliable?

According to our risk index, the 1.0 T3 and 1.3 T4 FireFly Turbo carries less risk than the 1.4 / 1.6 16v E-TEC II: 18/100 versus 19/100 (both low risk). The 1.0 T3 and 1.3 T4 FireFly Turbo has no documented serious faults; the 1.4 / 1.6 16v E-TEC II has no documented serious faults.

Risk index

1.0 T3 and 1.3 T4 FireFly Turbo

18

Low risk · 0 serious faults

Lower risk

Risk index

1.4 / 1.6 16v E-TEC II

19

Low risk · 0 serious faults

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 1.0 T3 and 1.3 T4 FireFly Turbo reliable?

The FireFly turbo 1.0 T3 and 1.3 T4 show no systemic fault in open sources; there are only isolated cases of jerking with replacement of the MultiAir block on the 1.0 and one engine failure on a 1.3. The evidence is thin and is not a guarantee of reliability.[1][2][3]

See the 2 of the 1.0 T3 and 1.3 T4 FireFly Turbo faults

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.[4][5][6]

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

Side-by-side comparison

Comparison of 1.0 T3 and 1.3 T4 FireFly Turbo and 1.4 / 1.6 16v E-TEC II
1.0 T3 and 1.3 T4 FireFly Turbo1.4 / 1.6 16v E-TEC II
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,332 cm³—
TimingChainTiming belt (dry)
Power100–180 hp83–109 hp
Productionsince 2018[7]2004–2011[8][9][10][11][12]
Reliability
Risk index (what is it?)18Low risk19Low risk
Documented faults23
Of high or critical severity00
Worst severityMedium severityMedium severity
Main faults
  1. Medium severity: Oil consumption and premature turbo wear on the 1.0 T3 and 1.3 T4
  2. Medium severity: Jerking and MultiAir block failures on the 1.0 T3
  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
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • 1.3 GSE T4 Turbo 150-180 hp (FireFly, since 2018)[1][13]
  • 1.3 GSE T4 Turbo plug-in hybrid 4xe (130-180 hp from the petrol engine, since 2021)[14][15]
  • 1.4 and 1.5 8v SOHC (Aveo, 2005-2011)[6][12]
With cautionVersions to be cautious about
  • 1.0 GSE T3 Turbo 100-120 hp (FireFly, since 2018)[1][2]
  • 1.0 T200 Turbo Flex 125-130 hp (South America, from 2021)[16][17]
  • 1.3 T270 Turbo Flex 182-185 hp (South America, from 2021)[16][17]
  • 1.4 16v DOHC 95-101 hp (F14D4/L95, 2004-2011)[4][5][12]
  • 1.6 16v DOHC 103-109 hp (L91/LXT, 2004-2011)[5][12][18]
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 T3 and 1.3 T4 FireFly Turbo

1.4 / 1.6 16v E-TEC II

Other comparisons

With the 1.0 T3 and 1.3 T4 FireFly Turbo

With the 1.4 / 1.6 16v E-TEC II

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. Fiabilité Jeep: témoignages de propriétairesfiches-auto.fr · Other source · consulted 29 October 2026 · in French
  2. Fiabilité Fiat: témoignages de propriétairesfiches-auto.fr · Other source · consulted 29 October 2026 · in French
  3. Broken chain in Firefly 1.0 engineFiat Forum · Owners' forum · consulted 30 October 2026
  4. Chevrolet Lacetti 1.4 16V - Niełatwo zdobyć zaufanieAuto Świat · Motoring press · published 19 November 2007 · consulted 2 November 2026 · in another language
  5. Bez fajerwerków - Chevrolet Lacetti (2003-2010)AutoCentrum.pl · Motoring press · published 7 April 2012 · consulted 2 November 2026 · in another language
  6. 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
  7. Fiat Global Small EngineWikipedia (inglés) · Other source · consulted 29 October 2026
  8. GM Family 1 engineWikipedia · Other source · consulted 2 November 2026
  9. Chevrolet LacettiWikipedia · Other source · consulted 2 November 2026
  10. Chevrolet LacettiWikipedia (de) · Other source · consulted 2 November 2026 · in German
  11. Chevrolet Aveo (T200)Wikipedia · Other source · consulted 2 November 2026
  12. Używany Chevrolet Aveo T200/T250 - typowe awarie i problemyWP Autokult · Motoring press · published 28 January 2012 · consulted 2 November 2026 · in another language
  13. Problemas Jeep CompassTotal Renting · Other source · consulted 29 October 2026 · in Spanish
  14. Jeep Renegade Problemecarwiki.de · Other source · consulted 29 October 2026 · in German
  15. Jeep Renegade 4xe plug-in hybrid reliability and safetyDriving Electric · Motoring press · consulted 29 October 2026
  16. Recall: Fiat convoca Fastback, Pulse e Toro por risco de incêndioGaragem 360 · Motoring press · published 25 November 2022 · consulted 2 November 2026 · in Portuguese
  17. Risco de incêndio: Fiat convoca recall para Pulse, Fastback e ToroMotor Show · Motoring press · published 25 November 2022 · consulted 2 November 2026 · in Portuguese
  18. W pierwszych silnikach 1,6 l przecierały się zawory (Chevrolet Lacetti)AutoCentrum.pl (usterki) · Owners' forum · consulted 2 November 2026 · in another language