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1.2 PureTech vs M266 (1.5, 1.7, 2.0 and 2.0 Turbo): which engine is more reliable?

According to our risk index, the M266 (1.5, 1.7, 2.0 and 2.0 Turbo) carries less risk than the 1.2 PureTech: 20/100 (low risk) versus 96/100 (very high risk). The 1.2 PureTech has 7 documented serious faults, the main one being «Oil-bath timing belt degradation»; the M266 (1.5, 1.7, 2.0 and 2.0 Turbo) has 1 documented serious fault, the main one being «Recall for the tank vent pipe (2010)».

Risk index

1.2 PureTech

96

Very high risk · 7 serious faults

Risk index

M266 (1.5, 1.7, 2.0 and 2.0 Turbo)

20

Low risk · 1 serious fault

Lower risk

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

24 sourcesHow we work

Is the 1.2 PureTech reliable?

The belt-driven 1.2 PureTech (2012-2025) has a problem acknowledged by Stellantis: the oil-bath timing belt can degrade, block lubrication and, on the 2013-2018 turbos, damage the brake servo vacuum pump. The 2014-2023 turbos can also use oil. Stellantis offers 10 years or 180,000 km of cover; the chain-driven generation (from 2023) no longer uses that belt.[1][2][3][4][5]

See the 7 of the 1.2 PureTech faults

Is the M266 (1.5, 1.7, 2.0 and 2.0 Turbo) reliable?

The M266 is the four-cylinder petrol engine (1.5, 1.7, 2.0 and 2.0 Turbo, from 95 to 193 hp) of the W169 A-Class and the W245 B-Class, from 2004 to 2012. The German guides give it a good reputation and cite no faults of its own; what is documented is a starter motor that sometimes fails and is expensive to replace, and a 2010 recall over the tank vent pipe.[6][7][8][9]

See the 2 of the M266 (1.5, 1.7, 2.0 and 2.0 Turbo) faults

Side-by-side comparison

Comparison of 1.2 PureTech and M266 (1.5, 1.7, 2.0 and 2.0 Turbo)
1.2 PureTechM266 (1.5, 1.7, 2.0 and 2.0 Turbo)
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,199 cm³—
TimingWet belt (belt-in-oil)Chain
Power68–155 hp95–193 hp
Productionsince 2012[10][11]2004–2012[12][13][14]
Reliability
Risk index (what is it?)96Very high risk20Low risk
Documented faults72
Of high or critical severity71
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Oil-bath timing belt degradation
  2. Critical severity: Loss of braking assistance from vacuum pump damage
  3. High severity: Excessive oil consumption from carbon on the piston rings or oil separator failure
  1. Medium severity: Faulty starter motor on the M266 (expensive repair)
  2. High severity: Recall for the tank vent pipe (2010)
Most expensive documented repairup to €1,200Oil-bath timing belt degradationPublished figure[2][15][16][17]No reliable data
Which versions to buy
BuyRecommended versionsNone
  • M266 E15 1.5 95 hp (A 150/A 160 and B 150/B 160; 2004-2012)[6][8][18]
With cautionVersions to be cautious about
  • 1.2 VTi / PureTech naturally aspirated 68-83 hp (EB2, EB2F, EB2FA..., from 2012)[1][3][19]
  • 1.2 PureTech turbo 110 and 130 hp Euro 6.1 (EB2DT, EB2DTS, 2013-2018)[2][3][4][20]
  • 1.2 PureTech turbo 100-155 hp Euro 6.2/6.3/6d (2018-2022)[2][4][21]
  • 1.2 PureTech turbo 100 and 130 hp with revised belt (2022-2025)[1][2][22]
  • 1.2 Turbo / Hybrid third generation with chain, 100-145 hp (from 2023)[23][24]
  • M266 E17 1.7 116 hp (A 170/A 180 and B 170/B 180; 2004-2012)[8][18]
  • M266 E20 2.0 136 hp (A 200 and B 200; 2004-2012)[8][18]
  • M266 E20 AL 2.0 Turbo 193 hp (A 200 Turbo and B 200 Turbo; 2005-2010)[6][8]
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 1.2 PureTech

With the M266 (1.5, 1.7, 2.0 and 2.0 Turbo)

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. Stellantis ofrece medidas a los afectados por los motores PureTech tras miles de demandaskm77 · Motoring press · published 28 November 2025 · consulted 26 September 2026 · in Spanish
  2. Moteur PureTech. Stellantis généralise sa garantie de 10 ans ou 180 000 kmL'argus · Motoring press · published 26 May 2025 · consulted 26 September 2026 · in French
  3. Safety Gate, alerta A12/01505/20: Peugeot 208, 308, 2008, 3008, 5008 y Partner (copia en PDF)Comisión Europea – Safety Gate · Official body · published November 2020 · consulted 26 September 2026
  4. Fiabilité Stellantis 1.2 PureTech. De nouvelles solutions contre la consommation d'huileL'argus · Motoring press · published 23 June 2024 · consulted 26 September 2026 · in French
  5. Stellantis 1.2 Puretech engine: list of belt and chain modelsItalPassion · Motoring press · published 2 February 2025 · consulted 26 September 2026
  6. Mercedes-Benz A-Klasse 2004-2012 W169 Probleme und SchwachstellenGebrauchtwagenberater · Motoring press · consulted 2 November 2026 · in German
  7. Mercedes B-Klasse T245: Typische Probleme & SchwachstellenGebrauchtwagenberater · Motoring press · consulted 2 November 2026 · in German
  8. Fiabilité Mercedes Classe B (2005-2012) : pannes et avisFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
  9. Mercedes-Benz: Rückruf für A- und B-KlasseAutoservicepraxis · Motoring press · published 22 September 2010 · consulted 2 November 2026 · in German
  10. Moteur EBWikipédia (francés) · Other source · consulted 26 September 2026 · in French
  11. El Peugeot 208 estrena motor Turbo 100 con distribución por cadenaDiariomotor · Motoring press · published 16 March 2026 · consulted 26 September 2026 · in Spanish
  12. Mercedes-Benz M 166 / M 266Wikipedia (de) · Other source · consulted 2 November 2026 · in German
  13. Mercedes-Benz W169Wikipedia (de) · Other source · consulted 2 November 2026 · in German
  14. Mercedes Classe A : motorisations, moteurs et consommationFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
  15. 1.2 PureTech: precio y cambio de correa de distribuciónAutopista · Motoring press · published 2 August 2026 · consulted 26 September 2026 · in Spanish
  16. Stellantis reacciona a los motores PureTech defectuosos: amplía la garantía de manera retroactiva a 10 añosXataka · Motoring press · published 27 March 2024 · consulted 26 September 2026 · in Spanish
  17. La correa bañada en aceite: cámbiala cada 60.000 km y evita una avería de 3.000 eurosMotor16 · Motoring press · published 27 August 2026 · consulted 26 September 2026 · in Spanish
  18. Fiabilité Mercedes Classe A (2004-2012) : pannes et avisFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
  19. Rappel des moteurs 1.2 Puretech 110 et 130 chFiches-auto.fr · Motoring press · consulted 26 September 2026 · in French
  20. Peugeot-Citroën-DS-Opel. Nouveau rappel de grande ampleur pour le moteur 1.2 PureTechL'argus · Motoring press · published 28 January 2023 · consulted 26 September 2026 · in French
  21. Peugeot, sobre los motores PureTech: «Reconocemos que hemos hecho las cosas mal»Xataka · Motoring press · published 4 June 2026 · consulted 26 September 2026 · in Spanish
  22. 10 años o 175.000 km de garantía para los modelos de Stellantis con motor PureTechAutofácil · Motoring press · published 27 March 2024 · consulted 26 September 2026 · in Spanish
  23. Confirmado: Stellantis llama a revisión a más de 200.000 coches con el motor gasolina sucesor del 1.2 PureTech: «Y también se hará en España»Motorpasión · Motoring press · published 15 July 2025 · consulted 26 September 2026 · in Spanish
  24. Fiabilité du 1.2 PuretechFiches-auto.fr · Motoring press · consulted 26 September 2026 · in French