1.0 PureTech vs BMW N54/N55: which engine is more reliable?

According to our risk index, the BMW N54/N55 carries less risk than the 1.0 PureTech: 48/100 (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 BMW N54/N55 has 1 documented serious fault, the main one being «High-pressure fuel pump (HPFP) failure».

Risk index

1.0 PureTech

High risk · 2 serious faults

Risk index

BMW N54/N55

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 30 October 202614 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 BMW N54/N55 reliable?

The N54 (2006-2016) is a 3.0-litre twin-turbo straight-six with many documented faults: high-pressure pump, injectors and wastegates. The N55 (2009-2019) uses a single turbo and is considered simpler, although it shares oil leaks from the filter housing and the electric water pump.^[5][6][7][8]

See the 6 of the BMW N54/N55 faults

Side-by-side comparison

Comparison of 1.0 PureTech and BMW N54/N55
Item	1.0 PureTech	BMW N54/N55
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	999 cm³	2,979 cm³
Timing	Wet belt (belt-in-oil)	Chain
Power	68 hp	302–335 hp
Production	2012–2016^{[2][3][9][10]}	2006–2019^[5][6]
Reliability
Risk index (what is it?)	59High risk	48Moderate risk
Documented faults	3	6
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: High-pressure fuel pump (HPFP) failure Medium severity: N54 piezoelectric injector failure Medium severity: Turbo wastegate noise and failure
Most expensive documented repair	up to €1,200Degradation of the oil-bath timing beltPublished figure^[11][12]	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][11]}	N54B30 302 hp (2006-2010)^[5][7][13] N54 322 hp (2008-2013)^[5][7][13] N54 335 hp (2011-2016)^[5][7][13] N55B30M0 302 hp (2009-2018)^[6][8][14] N55B30 315 hp (2011-2018)^[6][8][14] N55B30O0 322 hp (2014-2016)^[6][8][14] N55HP 335 hp (2013-2015)^[6][8][14]
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

BMW N54/N55

See the 13 models with the BMW N54/N55

Other comparisons

With the 1.0 PureTech

With the BMW N54/N55

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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 N54Wikipedia · Other source · consulted 5 October 2026
BMW N55Wikipedia · Other source · consulted 5 October 2026
Todo lo que necesitas saber sobre el motor BMW N54High Performance Academy · Technical documentation · consulted 5 October 2026 · in Spanish
BMW N55 Typische Probleme und HaltbarkeitGebrauchtwagenberater · Motoring press · published 23 February 2025 · consulted 5 October 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
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
The Definitive Guide to the BMW N54 EngineFCP Euro · Technical documentation · consulted 5 October 2026
BMW N55 Common ProblemsBMW Tuning · Technical documentation · consulted 5 October 2026