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0.8 / 1.0 / 1.2 S-TEC vs 1.8 and 2.0 XU: which engine is more reliable?

According to our risk index, the 0.8 / 1.0 / 1.2 S-TEC carries less risk than the 1.8 and 2.0 XU: 18/100 (low risk) versus 39/100 (moderate risk). The 0.8 / 1.0 / 1.2 S-TEC has no documented serious faults; the 1.8 and 2.0 XU has 1 documented serious fault, the main one being «Premature timing belt breakage in the 16-valve engines».

Risk index

0.8 / 1.0 / 1.2 S-TEC

18

Low risk · 0 serious faults

Lower risk

Risk index

1.8 and 2.0 XU

39

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

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 1.8 and 2.0 XU reliable?

These are naturally aspirated 1.8 and 2.0-litre petrol engines with no serious documented design faults outside the 16-valve timing belt: the 1.8 16v built until late 1997 had a recall for premature breakages, and the 2.0 16v in the GTi-6 calls for shorter belt change intervals. The rest are minor faults: coolant and oil leaks, sensors and idle.[4][5][6][7]

See the 5 of the 1.8 and 2.0 XU faults

Side-by-side comparison

Comparison of 0.8 / 1.0 / 1.2 S-TEC and 1.8 and 2.0 XU
0.8 / 1.0 / 1.2 S-TEC1.8 and 2.0 XU
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement——
TimingTiming belt (dry)Timing belt (dry)
Power52–84 hp90–167 hp
Production2002–2022[8][9][10][11][12]1993–2002[13][14][15][16]
Reliability
Risk index (what is it?)18Low risk39Moderate risk
Documented faults25
Of high or critical severity01
Worst severityMedium severityCritical 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. Critical severity: Premature timing belt breakage in the 16-valve engines
  2. Medium severity: Coolant leaks from the thermostat housing and radiator
  3. Medium severity: Oil consumption and oil leaks
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)[17][18]
  • 1.0 and 1.2 S-TEC II DOHC 16v (Spark M300, Beat and Sail, 2010-2022)[2][3]
  • 1.8 8v 90-103 hp (XU7JB/LFX and XU7JP/LFZ, 1993-2001)[4][5][19]
  • 2.0 8v 121-123 hp (XU10J2C/RFX, until 1997)[4][20]
With cautionVersions to be cautious about
  • 0.8 and 1.0 S-TEC SOHC (Matiz/Spark M200, 2005-2009)[1][12]
  • 1.4 S-TEC DOHC 16v 102 hp (LCU, Sail, 2010-2015)[21][22][23]
  • 1.8 16v 110-112 hp (XU7JP4/LFY, 1995-2002)[4][5][6]
  • 2.0 16v 132-135 hp (XU10J4R/RFV, 1995-2002)[6][7][24]
  • 2.0 16v 150-167 hp (XU10J4/RFT/RFY S16 and XU10J4RS/RFS GTi-6 and VTS, 1993-2002)[7][20][25]
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 1.8 and 2.0 XU

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. Peugeot 306: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
  5. Citroën Xsara: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
  6. Peugeot 406: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
  7. Peugeot 306 GTI-6 buying guide: powertrainPistonHeads · Motoring press · published 4 September 2016 · consulted 2 November 2026
  8. Daewoo S-TEC engineWikipedia · Other source · consulted 2 November 2026
  9. Chevrolet SparkWikipedia · Other source · consulted 2 November 2026
  10. Chevrolet Aveo (T200)Wikipedia · Other source · consulted 2 November 2026
  11. Chevrolet AveoWikipedia (de) · Other source · consulted 2 November 2026 · in German
  12. Chevrolet MatizWikipedia (de) · Other source · consulted 2 November 2026 · in German
  13. PSA XU engineWikipedia (en) · Other source · consulted 2 November 2026
  14. Peugeot 306Wikipedia (en) · Other source · consulted 2 November 2026
  15. Citroën XsaraWikipedia (de) · Other source · consulted 2 November 2026 · in German
  16. Citroën XsaraWikipedia (es) · Other source · consulted 2 November 2026 · in Spanish
  17. 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
  18. Używany Chevrolet Aveo T200/T250 - typowe awarie i problemyWP Autokult · Motoring press · published 28 January 2012 · consulted 2 November 2026 · in another language
  19. Fiabilité Citroën Berlingo: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  20. Fiabilité Peugeot 306: pannes et avis des propriétairesFiches-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. Fiabilité Peugeot 406: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  25. Fiabilité Citroën Xsara: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French