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BMW N20 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 BMW N20: 18/100 (low risk) versus 63/100 (high risk). The BMW N20 has 2 documented serious faults, the main one being «Timing chain guide and tensioner wear (2011-2015)»; the 0.8 / 1.0 / 1.2 S-TEC has no documented serious faults.

Risk index

BMW N20

63

High risk · 2 serious faults

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

16 sourcesHow we work

Is the BMW N20 reliable?

The BMW N20 (2011-2017) was the first turbocharged four-cylinder with which BMW replaced its naturally aspirated six-cylinders in models such as the 320i, 328i and X3, and it is generally mechanically sound. Its best-documented weak point is the timing chain guides and tensioner on units built before 2015; oil leaks, the electric water pump and, to a lesser extent, the turbo and the high-pressure fuel pump are also known issues.[1][2]

See the 5 of the BMW N20 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.[3][4][5]

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

Side-by-side comparison

Comparison of BMW N20 and 0.8 / 1.0 / 1.2 S-TEC
BMW N200.8 / 1.0 / 1.2 S-TEC
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,997 cm³—
TimingChainTiming belt (dry)
Power156–245 hp52–84 hp
Production2011–2017[1][6]2002–2022[7][8][9][10][11]
Reliability
Risk index (what is it?)63High risk18Low risk
Documented faults52
Of high or critical severity20
Worst severityCritical severityMedium severity
Main faults
  1. Critical severity: Timing chain guide and tensioner wear (2011-2015)
  2. Critical severity: Electric water pump failure (BMW campaign in the US over fire risk)
  3. Medium severity: Oil leaks from the rocker cover gasket and the filter housing
  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)[12][13]
  • 1.0 and 1.2 S-TEC II DOHC 16v (Spark M300, Beat and Sail, 2010-2022)[4][5]
With cautionVersions to be cautious about
  • N20B20 156 hp (115 kW, 2013-2016)[2]
  • N20B20B 184 hp (135 kW, 2011-2017)[2]
  • N20B20 218 hp (160 kW, 2012-2015)[2]
  • N20B20A 245 hp (180 kW, 2011-2017)[2]
  • 0.8 and 1.0 S-TEC SOHC (Matiz/Spark M200, 2005-2009)[3][11]
  • 1.4 S-TEC DOHC 16v 102 hp (LCU, Sail, 2010-2015)[14][15][16]
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 BMW N20

With the 0.8 / 1.0 / 1.2 S-TEC

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. BMW N20Wikipedia (inglés) · Other source · consulted 27 September 2026
  2. BMW N20 Engine: Pros, Cons, Reliability, Tuning, and Maintenance GuideBMW BLOG · Motoring press · published 8 June 2025 · consulted 27 September 2026
  3. 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
  4. Chevrolet Spark hatchback reviewAuto Express · Motoring press · published October 2013 · consulted 2 November 2026
  5. Fiabilité Chevrolet Spark (2009-2015): pannes, rappels et témoignagesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  6. BMW N20Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  7. Daewoo S-TEC engineWikipedia · Other source · consulted 2 November 2026
  8. Chevrolet SparkWikipedia · Other source · consulted 2 November 2026
  9. Chevrolet Aveo (T200)Wikipedia · Other source · consulted 2 November 2026
  10. Chevrolet AveoWikipedia (de) · Other source · consulted 2 November 2026 · in German
  11. Chevrolet MatizWikipedia (de) · Other source · consulted 2 November 2026 · in German
  12. 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
  13. Używany Chevrolet Aveo T200/T250 - typowe awarie i problemyWP Autokult · Motoring press · published 28 January 2012 · consulted 2 November 2026 · in another language
  14. Chevrolet SailWikipedia (español) · Other source · consulted 2 November 2026 · in Spanish
  15. Chevrolet Sail: conócelo en detalleAutocosmos Chile · Motoring press · published 3 November 2010 · consulted 2 November 2026 · in Spanish
  16. Lanzamiento Chevrolet SailAutoblog Uruguay · Motoring press · published May 2013 · consulted 2 November 2026 · in Spanish