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0.8 / 1.0 / 1.2 S-TEC vs 1.5 VTi-TECH / T-GDI: which engine is more reliable?

According to our risk index, the 1.5 VTi-TECH / T-GDI carries less risk than the 0.8 / 1.0 / 1.2 S-TEC: 7/100 versus 18/100 (both low risk). The 0.8 / 1.0 / 1.2 S-TEC has no documented serious faults; the 1.5 VTi-TECH / T-GDI has no documented serious faults.

Risk index

0.8 / 1.0 / 1.2 S-TEC

18

Low risk · 0 serious faults

Risk index

1.5 VTi-TECH / T-GDI

7

Low risk · 0 serious faults

Lower risk

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

25 sourcesHow we work

Is the 0.8 / 1.0 / 1.2 S-TEC reliable?

The GM Daewoo S-TEC engines (0.8, 1.0 and 1.2 naturally aspirated, low power) power the Matiz, Spark, Aveo 1.2, Beat and Sail. The sources consulted document only minor and cheap faults, such as oil leaks and ignition faults on the Matiz, and we have found no structural engine fault.[1][2][3]

See the 2 of the 0.8 / 1.0 / 1.2 S-TEC faults

Is the 1.5 VTi-TECH / T-GDI reliable?

MG/SAIC's "1.5" covers two different engines: the naturally aspirated VTi-TECH (106 hp), the entry-level engine in the MG ZS, and the turbocharged T-GDI (162-170 hp), found only in the MG HS and as the petrol engine in its plug-in hybrids. Neither has well-documented engine faults in independent sources yet: the complaints published concern electronics, the automatic gearbox and finish, not the engine block.[4][5][6][7][8][9]

See the 2 of the 1.5 VTi-TECH / T-GDI faults

Side-by-side comparison

Comparison of 0.8 / 1.0 / 1.2 S-TEC and 1.5 VTi-TECH / T-GDI
0.8 / 1.0 / 1.2 S-TEC1.5 VTi-TECH / T-GDI
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement——
TimingTiming belt (dry)Chain
Power52–84 hp106–170 hp
Production2002–2022[10][11][12][13][14]since 2017[4][5][15][16][17]
Reliability
Risk index (what is it?)18Low risk7Low risk
Documented faults22
Of high or critical severity00
Worst severityMedium severityLow severity
Main faults
  1. Medium severity: Ignition system faults (high-tension leads and modules)
  2. Low severity: Oil leaks from the rocker cover and sump
  1. Low severity: Jerky or harsh automatic gearbox shifts when cold or at low speed (MG HS)
  2. Low severity: Electronic warnings and occasional sensor faults (MG HS)
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • 1.2 S-TEC and S-TEC II 72-84 hp (Aveo T200/T250, 2005-2011)[18][19]
  • 1.0 and 1.2 S-TEC II DOHC 16v (Spark M300, Beat and Sail, 2010-2022)[2][3]
  • 1.5 VTi-TECH naturally aspirated 106 hp (NSE / NSE Plus, from 2017)[7]
  • 1.5 VTi-TECH naturally aspirated 106 hp (15S4C, MG3, 2013–2024)[20]
With cautionVersions to be cautious about
  • 0.8 and 1.0 S-TEC SOHC (Matiz/Spark M200, 2005-2009)[1][14]
  • 1.4 S-TEC DOHC 16v 102 hp (LCU, Sail, 2010-2015)[21][22][23]
  • 1.5 T-GDI turbo 162 hp (GS61H, 2018-2024)[8][9][24][25]
  • 1.5 T-GDI turbo 170 hp (15FDE / 15FKE, from 2024)[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 0.8 / 1.0 / 1.2 S-TEC

With the 1.5 VTi-TECH / T-GDI

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. Czy warto kupić: używany Daewoo / FSO Matiz (od 1998 do 2008)AutoCentrum.pl · Motoring press · published 22 August 2013 · consulted 2 November 2026 · in another language
  2. Chevrolet Spark hatchback reviewAuto Express · Motoring press · published October 2013 · consulted 2 November 2026
  3. Fiabilité Chevrolet Spark (2009-2015): pannes, rappels et témoignagesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  4. MG ZS (crossover)Wikipedia (inglés) · Other source · consulted 27 September 2026
  5. MG HSWikipedia (inglés) · Other source · consulted 27 September 2026
  6. Essai complet : MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
  7. Fiabilité et pannes du MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
  8. Fiabilité et pannes du MG eHSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
  9. MG HS PHEV: guía definitiva de problemas y soluciones del SUV, el híbrido enchufable más vendidoAutopista.es · Motoring press · published 10 November 2025 · consulted 27 September 2026 · in Spanish
  10. Daewoo S-TEC engineWikipedia · Other source · consulted 2 November 2026
  11. Chevrolet SparkWikipedia · Other source · consulted 2 November 2026
  12. Chevrolet Aveo (T200)Wikipedia · Other source · consulted 2 November 2026
  13. Chevrolet AveoWikipedia (de) · Other source · consulted 2 November 2026 · in German
  14. Chevrolet MatizWikipedia (de) · Other source · consulted 2 November 2026 · in German
  15. MG HSWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  16. MG HSWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  17. List of General Motors enginesWikipedia (inglés) · Other source · consulted 27 September 2026
  18. 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
  19. Używany Chevrolet Aveo T200/T250 - typowe awarie i problemyWP Autokult · Motoring press · published 28 January 2012 · consulted 2 November 2026 · in another language
  20. Témoignages de fiabilité MG (MG3 1.5 VTi-Tech 106 ch sin testimonios; solo los del híbrido de 2024)Fiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  21. Chevrolet SailWikipedia (español) · Other source · consulted 2 November 2026 · in Spanish
  22. Chevrolet Sail: conócelo en detalleAutocosmos Chile · Motoring press · published 3 November 2010 · consulted 2 November 2026 · in Spanish
  23. Lanzamiento Chevrolet SailAutoblog Uruguay · Motoring press · published May 2013 · consulted 2 November 2026 · in Spanish
  24. MG – Common problems (llamadas a revisión de la UE y del Reino Unido)car-recalls.eu · Other source · consulted 30 October 2026
  25. MG HS SUV (2019-2024) Exclusive 1.5T-GDI 5d: opinión de propietario (10 jun 2022)Parkers · Owners' forum · published 10 June 2022 · consulted 30 October 2026