1.0 PureTech vs M111: which engine is more reliable?

According to our risk index, the M111 carries less risk than the 1.0 PureTech: 38/100 (moderate risk) versus 59/100 (high risk). The 1.0 PureTech has 2 documented serious faults, the main one being «Excessive oil consumption through the piston rings»; the M111 has no documented serious faults.

Risk index

1.0 PureTech

High risk · 2 serious faults

Risk index

M111

Moderate 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

Reviewed on 30 October 202611 sources How we work

Is the 1.0 PureTech reliable?

It is a simple naturally aspirated three-cylinder, but with two documented weak points: oil consumption through the piston rings, which Stellantis acknowledges across its entire production (2012-2016), and the oil-bath timing belt it shares with the 1.2. It is only recommended with a full service history, a consumption test and a checked belt.^[1][2][3][4]

See the 3 of the 1.0 PureTech faults

Is the M111 reliable?

The M111 is the four-cylinder petrol engine Mercedes-Benz fitted from 1992 to 2006 in the C-Class (W202 and the early years of the W203), the E-Class (W210), the CLK (C208), the SLK (R170) and the Sprinter, in naturally aspirated form and with a mechanical supercharger (Kompressor). A German used-car guide describes it as reliable when well maintained, with limited weak points: the head gasket and an oil leak into the camshaft adjuster wiring.^[5][6]

See the 5 of the M111 faults

Side-by-side comparison

Comparison of 1.0 PureTech and M111
Item	1.0 PureTech	M111
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	999 cm³	—
Timing	Wet belt (belt-in-oil)	Chain
Power	68 hp	122–197 hp
Production	2012–2016^[2][3][7][8]	1992–2006^[5][9]
Reliability
Risk index (what is it?)	59High risk	38Moderate risk
Documented faults	3	5
Of high or critical severity	2	0
Worst severity	Critical severity	Medium severity
Main faults	High severity: Excessive oil consumption through the piston rings Critical severity: Degradation of the oil-bath timing belt Low severity: Ignition coil and spark plug failure	Medium severity: Head gasket failure with coolant loss Medium severity: Camshaft adjuster oil leak into the wiring Medium severity: Mechanical supercharger (Kompressor) wear at high mileage
Most expensive documented repair	up to €1,200Degradation of the oil-bath timing beltPublished figure^[10][11]	No reliable data
Which versions to buy
BuyRecommended versions	None	None
With cautionVersions to be cautious about	1.0 VTi / PureTech 68 (EB0, 2012-2016)^{[1][2][4][10]}	M111 naturally aspirated 1.8/2.0/2.2/2.3 (E18/E20/E22/E23)^[5][6] M111 Kompressor 2.0/2.3 (E20 ML/E23 ML)^[5][6]
AvoidVersions to avoid	None	None

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

1.0 PureTech

M111

Other comparisons

With the 1.0 PureTech

With the M111

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Sources

Every fact on this page links to its source. If you find an error, let us know.

Citroën, DS, Opel, Peugeot 1.2 PureTech. Nouvelle prise en charge pour la consommation d'huileL'argus · Motoring press · published 30 March 2024 · consulted 26 September 2026 · in French
Moteur EBWikipédia · Other source · consulted 26 September 2026 · in French
PSA inaugure son « trois-pattes »L'argus · Motoring press · published 28 December 2011 · consulted 26 September 2026 · in French
Moteurs PureTech - Stellantis prend a minima ses responsabilitésUFC-Que Choisir · Consumer association · published 18 January 2025 · consulted 26 September 2026 · in French
Mercedes-Benz M111 engineWikipedia · Other source · consulted 27 September 2026
Mercedes M111: Typische Probleme und HaltbarkeitGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Peugeot 208 5p Access 1.0 PureTech 68 (2012-2015): precio y ficha técnicakm77 · Technical documentation · consulted 26 September 2026 · in Spanish
Prueba de consumo (126): Peugeot 208 1.0-VTi 68 CVkm77 · Motoring press · published 5 August 2013 · consulted 26 September 2026 · in Spanish
Mercedes-Benz M 111Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
1.2 PureTech: precio y cambio de correa de distribuciónAutopista · Motoring press · published 2 August 2026 · consulted 26 September 2026 · in Spanish
Motor ZMZ EB0 Citroën Peugeot C3 II 208 I 1.0 VTi 68 CV usado y reconstruidoFair Motors · Technical documentation · consulted 26 September 2026 · in Spanish