1.0 PureTech vs M43 1.6, 1.8 and 1.9: which engine is more reliable?

According to our risk index, the M43 1.6, 1.8 and 1.9 carries less risk than the 1.0 PureTech: 42/100 (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 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».

Risk index

1.0 PureTech

High risk · 2 serious faults

Risk index

M43 1.6, 1.8 and 1.9

Moderate 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

Reviewed on 2 November 202615 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 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.^[5][6][7]

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

Side-by-side comparison

Comparison of 1.0 PureTech and M43 1.6, 1.8 and 1.9
Item	1.0 PureTech	M43 1.6, 1.8 and 1.9
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	999 cm³	—
Timing	Wet belt (belt-in-oil)	Chain
Power	68 hp	102–118 hp
Production	2012–2016^[2][3][8][9]	1993–2002^[6][10][11]
Reliability
Risk index (what is it?)	59High risk	42Moderate risk
Documented faults	3	5
Of high or critical severity	2	1
Worst severity	Critical severity	High 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	High severity: Failure of the plastic parts in the cooling system Medium severity: DISA intake manifold valve with play and noise Low severity: Oil leaks from gaskets (rocker cover, front cover and crankcase breather)
Most expensive documented repair	up to €1,200Degradation of the oil-bath timing beltPublished figure^[12][13]	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][12]}	M43B16, 1.6 litre (102 hp; 1993-1999)^[5][6][7] M43B18, 1.8 litre (115 hp; 1993-1999)^[5][14] M43TUB19, 1.9 litre (105 hp; 1998-2002)^[5][7][15] M43TUB19, 1.9 litre (118 hp; 1998-2002)^[5][7][15]
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

M43 1.6, 1.8 and 1.9

Other comparisons

With the 1.0 PureTech

With the M43 1.6, 1.8 and 1.9

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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
BMW M43B18 1.8L 115hp inline-4 cylinder engineAutoHints · Technical documentation · consulted 2 November 2026
Der BMW M43 Motor: Technische Daten, Probleme, Haltbarkeit & FahrzeuglisteCarWiki.de · Other source · consulted 2 November 2026 · in German
BMW M43: problemas conocidosEnginescope · Other source · consulted 2 November 2026
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
BMW M43Wikipedia (inglés) · Other source · consulted 2 November 2026
BMW M43Wikipedia (alemán) · Other source · consulted 2 November 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
BMW 3 Series E36 Reliability Guide: Everything You Need to Know Before BuyingEuro Premium Parts · Technical documentation · consulted 2 November 2026
316i M43: 17 Jahre, Standhaftigkeit erhöhen (E46)BMW-Syndikat (foro) · Owners' forum · consulted 2 November 2026 · in German