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M43 1.6, 1.8 and 1.9 vs 0.8 / 1.0 / 1.2 S-TEC: which engine is more reliable?

According to our risk index, the 0.8 / 1.0 / 1.2 S-TEC carries less risk than the M43 1.6, 1.8 and 1.9: 18/100 (low risk) versus 42/100 (moderate risk). The M43 1.6, 1.8 and 1.9 has 1 documented serious fault, the main one being «Failure of the plastic parts in the cooling system»; the 0.8 / 1.0 / 1.2 S-TEC has no documented serious faults.

Risk index

M43 1.6, 1.8 and 1.9

42

Moderate risk · 1 serious fault

Risk index

0.8 / 1.0 / 1.2 S-TEC

18

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

20 sourcesHow we work

Is the M43 1.6, 1.8 and 1.9 reliable?

The M43 (1993-2002) is an 8-valve petrol four-cylinder with a timing chain that Autohints describes as one of BMW’s most durable engines of the nineties. The faults the sources cite are with ancillaries: plastic cooling parts, oil leaks from the gaskets, rough idle, ignition and, in some versions, the DISA valve.[1][2][3]

See the 5 of the M43 1.6, 1.8 and 1.9 faults

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.[4][5][6]

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

Side-by-side comparison

Comparison of M43 1.6, 1.8 and 1.9 and 0.8 / 1.0 / 1.2 S-TEC
M43 1.6, 1.8 and 1.90.8 / 1.0 / 1.2 S-TEC
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement——
TimingChainTiming belt (dry)
Power102–118 hp52–84 hp
Production1993–2002[2][7][8]2002–2022[9][10][11][12][13]
Reliability
Risk index (what is it?)42Moderate risk18Low risk
Documented faults52
Of high or critical severity10
Worst severityHigh severityMedium severity
Main faults
  1. High severity: Failure of the plastic parts in the cooling system
  2. Medium severity: DISA intake manifold valve with play and noise
  3. Low severity: Oil leaks from gaskets (rocker cover, front cover and crankcase breather)
  1. Medium severity: Ignition system faults (high-tension leads and modules)
  2. Low severity: Oil leaks from the rocker cover and sump
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNone
  • 1.2 S-TEC and S-TEC II 72-84 hp (Aveo T200/T250, 2005-2011)[14][15]
  • 1.0 and 1.2 S-TEC II DOHC 16v (Spark M300, Beat and Sail, 2010-2022)[5][6]
With cautionVersions to be cautious about
  • M43B16, 1.6 litre (102 hp; 1993-1999)[1][2][3]
  • M43B18, 1.8 litre (115 hp; 1993-1999)[1][16]
  • M43TUB19, 1.9 litre (105 hp; 1998-2002)[1][3][17]
  • M43TUB19, 1.9 litre (118 hp; 1998-2002)[1][3][17]
  • 0.8 and 1.0 S-TEC SOHC (Matiz/Spark M200, 2005-2009)[4][13]
  • 1.4 S-TEC DOHC 16v 102 hp (LCU, Sail, 2010-2015)[18][19][20]
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

M43 1.6, 1.8 and 1.9

0.8 / 1.0 / 1.2 S-TEC

Other comparisons

With the M43 1.6, 1.8 and 1.9

With the 0.8 / 1.0 / 1.2 S-TEC

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. BMW M43B18 1.8L 115hp inline-4 cylinder engineAutoHints · Technical documentation · consulted 2 November 2026
  2. Der BMW M43 Motor: Technische Daten, Probleme, Haltbarkeit & FahrzeuglisteCarWiki.de · Buying guide or workshop · consulted 2 November 2026 · in German
  3. BMW M43: problemas conocidosEnginescope · Buying guide or workshop · consulted 2 November 2026
  4. 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
  5. Chevrolet Spark hatchback reviewAuto Express · Motoring press · published October 2013 · consulted 2 November 2026
  6. Fiabilité Chevrolet Spark (2009-2015): pannes, rappels et témoignagesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  7. BMW M43Wikipedia (inglés) · Encyclopedia · consulted 2 November 2026
  8. BMW M43Wikipedia (alemán) · Encyclopedia · consulted 2 November 2026 · in German
  9. Daewoo S-TEC engineWikipedia · Encyclopedia · consulted 2 November 2026
  10. Chevrolet SparkWikipedia · Encyclopedia · consulted 2 November 2026
  11. Chevrolet Aveo (T200)Wikipedia · Encyclopedia · consulted 2 November 2026
  12. Chevrolet AveoWikipedia (de) · Encyclopedia · consulted 2 November 2026 · in German
  13. Chevrolet MatizWikipedia (de) · Encyclopedia · consulted 2 November 2026 · in German
  14. 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
  15. Używany Chevrolet Aveo T200/T250 - typowe awarie i problemyWP Autokult · Motoring press · published 28 January 2012 · consulted 2 November 2026 · in another language
  16. BMW 3 Series E36 Reliability Guide: Everything You Need to Know Before BuyingEuro Premium Parts · Technical documentation · consulted 2 November 2026
  17. 316i M43: 17 Jahre, Standhaftigkeit erhöhen (E46)BMW-Syndikat (foro) · Owners' forum · consulted 2 November 2026 · in German
  18. Chevrolet SailWikipedia (español) · Encyclopedia · consulted 2 November 2026 · in Spanish
  19. Chevrolet Sail: conócelo en detalleAutocosmos Chile · Motoring press · published 3 November 2010 · consulted 2 November 2026 · in Spanish
  20. Lanzamiento Chevrolet SailAutoblog Uruguay · Motoring press · published May 2013 · consulted 2 November 2026 · in Spanish