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1.0 and 1.4 Boosterjet vs 1.0, 1.4 and 1.6 8v EA111: which engine is more reliable?

According to our risk index, the 1.0 and 1.4 Boosterjet carries less risk than the 1.0, 1.4 and 1.6 8v EA111: 6/100 (low risk) versus 50/100 (high risk). The 1.0 and 1.4 Boosterjet has no documented serious faults; the 1.0, 1.4 and 1.6 8v EA111 has 2 documented serious faults, the main one being «Engine noise and premature wear from lubrication in the 1.0 VHT».

Risk index

1.0 and 1.4 Boosterjet

6

Low risk · 0 serious faults

Lower risk

Risk index

1.0, 1.4 and 1.6 8v EA111

50

High risk · 2 serious faults

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

27 sourcesHow we work

Is the 1.0 and 1.4 Boosterjet reliable?

The Suzuki Boosterjet (1.0 K10C and 1.4 K14C/K14D) is a turbocharged direct-injection petrol engine with a timing chain, fitted since 2015 to the Vitara, S-Cross, Swift Sport and Baleno, with a 48 V mild-hybrid variant of the 1.4 since 2020. German TÜV inspection reports and the workshops we consulted rate its reliability as high: no widespread fault with the chain, oil, fuel pump or mild-hybrid system is documented.[1][2][3][4][5]

See the 4 of the 1.0 and 1.4 Boosterjet faults

Is the 1.0, 1.4 and 1.6 8v EA111 reliable?

Eight-valve petrol engines, simple, with a timing belt. For the European 1.0 and 1.4, sources only record isolated incidents, mainly ignition faults in damp weather on the 1.4. In Brazil, the 2008-2010 1.0 VHT of the Gol, Voyage and Fox suffered lubrication-related noise, an oil campaign with extended warranty and a software recall in 2009.[6][7][8][9]

See the 4 of the 1.0, 1.4 and 1.6 8v EA111 faults

Side-by-side comparison

Comparison of 1.0 and 1.4 Boosterjet and 1.0, 1.4 and 1.6 8v EA111
1.0 and 1.4 Boosterjet1.0, 1.4 and 1.6 8v EA111
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement——
TimingChainTiming belt (dry)
Power110–140 hp50–104 hp
Productionsince 2015[1][10][11][12]1991–2022[13][14][15][16]
Reliability
Risk index (what is it?)6Low risk50High risk
Documented faults44
Of high or critical severity02
Worst severityLow severityCritical severity
Main faults
  1. Low severity: Timing chain: no documented pattern of failures
  2. Low severity: Oil consumption: no documented pattern
  3. Low severity: Direct injection and fuel pump: no documented faults or recalls
  1. High severity: Engine noise and premature wear from lubrication in the 1.0 VHT
  2. Critical severity: Hard cold starting and software update for the 2009-2010 1.0
  3. Medium severity: Thermostat, housing and water pump of the cooling circuit
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • 1.0 Boosterjet 110-112 hp (K10C, three-cylinder, 2015-present)[2][3][17][18]
  • 1.4 Boosterjet 140 hp (K14C, non-hybrid, 2015-2020 in Europe)[2][3][19]
  • 1.4 Boosterjet Mild Hybrid 129 hp (K14D, 48V SHVS, since 2020)[11][12]
  • 1.0 8v 50 hp (AER, ALD, ALL, ANV, AUC; 1996-2005)[20][21]
With cautionVersions to be cautious aboutNone
  • 1.4 8v 55-60 hp (ABD, AKP, AEX, AKV, APQ, ANX, ANW; 1991-2005)[8][9]
  • 1.0 8v Mi and Total Flex (Brazilian EA-111, 1997-2008)[6][22][23][24]
  • 1.0 8v VHT flex (EA-111, 2008-2022)[6][22][25][26]
  • 1.6 8v Total Flex (Brazilian EA-111, 2003-2022)[22][27]
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 and 1.4 Boosterjet

See the 12 models with the 1.0 and 1.4 Boosterjet

1.0, 1.4 and 1.6 8v EA111

See the 9 models with the 1.0, 1.4 and 1.6 8v EA111

Other comparisons

With the 1.0 and 1.4 Boosterjet

With the 1.0, 1.4 and 1.6 8v EA111

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. Suzuki K engineWikipedia · Other source · consulted 27 September 2026
  2. Gebrauchtwagen-Check: Grundsätzlich gut: Der Suzuki Vitara beim TÜVVolksstimme (dpa) · General press · published January 2026 · consulted 27 September 2026 · in German
  3. Suzuki Swift als Gebrauchtwagen: Diese Punkte beanstandet der TÜV häufigT-Online · General press · published October 2025 · consulted 27 September 2026 · in German
  4. Los mecánicos recomiendan el Suzuki Vitara porque no presume de moderno, sino de sencillo y baratoEl Nacional · General press · published September 2026 · consulted 27 September 2026 · in Spanish
  5. Test complet Suzuki VitaraFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  6. A VW e o problema dos motores 1.0Motorshow · Motoring press · published 1 December 2009 · consulted 2 November 2026 · in Portuguese
  7. Volkswagen faz recall do novo Gol, Voyage e Fox 1.0Vrum · Motoring press · published 17 August 2009 · consulted 2 November 2026 · in Portuguese
  8. Fiabilité Volkswagen Polo III (1994-2001) - pannes moteur, boîte...Fiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  9. Volkswagen Polo III: averías notificadas por los usuariosAutoCentrum.pl · Owners' forum · consulted 2 November 2026 · in another language
  10. Suzuki motor KWikipedia · Other source · consulted 27 September 2026 · in Spanish
  11. Suzuki Swift Sport, Vitara y S-Cross: nuevas versiones micro-híbridas de 48VAutopista.es · Motoring press · published 16 December 2019 · consulted 27 September 2026 · in Spanish
  12. Suzuki S-Cross 1.4 Boosterjet Mild Hybrid 2020: precios y datos del nuevo SUVAutopista.es · Motoring press · published 12 March 2020 · consulted 27 September 2026 · in Spanish
  13. List of discontinued Volkswagen Group petrol enginesWikipedia (en) · Other source · consulted 2 November 2026
  14. VW Golf IIIWikipedia (de) · Other source · consulted 2 November 2026 · in German
  15. Volkswagen GolWikipedia (pt) · Other source · consulted 2 November 2026 · in Portuguese
  16. Troca de bomba d'água e correia de sincronismo do Gol G5 EA111Revista O Mecânico · Motoring press · published 7 March 2025 · consulted 2 November 2026 · in Portuguese
  17. Suzuki Vitara : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  18. Suzuki Swift 3 : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  19. Prueba Suzuki Swift Sport 1.4 Boosterjet 140 CVActualidad Motor · Motoring press · published 16 May 2018 · consulted 27 September 2026 · in Spanish
  20. Fiabilité Volkswagen Lupo (1998-2005) - pannes moteur, boîte...Fiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  21. Volkswagen Lupo (1998–2005): opiniones por motorizaciónAutoCentrum.pl · Owners' forum · consulted 2 November 2026 · in another language
  22. Justiça do RS determina recall de 400 mil veículos da VolkswagenOlhar Direto (con G1) · General press · published 13 January 2013 · consulted 2 November 2026 · in Portuguese
  23. Substituição de bobina, cabos e velas de ignição do Volkswagen Fox 1.0Revista O Mecânico · Motoring press · published 1 December 2025 · consulted 2 November 2026 · in Portuguese
  24. Volkswagen Gol: os 5 maiores defeitos crônicos do queridinho do BrasilVrum · Motoring press · published 9 April 2026 · consulted 2 November 2026 · in Portuguese
  25. Mais um recall e mais uma marca colocada à provaMecânica Online · Motoring press · published 1 November 2009 · consulted 2 November 2026 · in Portuguese
  26. Tribunal revoga recall para Gol, Voyage e FoxiCarros · Motoring press · published 16 January 2013 · consulted 2 November 2026 · in Portuguese
  27. Este é o motor Volkswagen que consumia mais óleo que gasolinaClick Petróleo e Gás · General press · published 12 June 2025 · consulted 2 November 2026 · in Portuguese