BMW N54/N55 vs 2.0 and 2.2 16v EW10/EW12: which engine is more reliable?

According to our risk index, the 2.0 and 2.2 16v EW10/EW12 carries less risk than the BMW N54/N55: 14/100 (low risk) versus 48/100 (moderate risk). The BMW N54/N55 has 1 documented serious fault, the main one being «High-pressure fuel pump (HPFP) failure»; the 2.0 and 2.2 16v EW10/EW12 has no documented serious faults.

Risk index

BMW N54/N55

Moderate risk · 1 serious fault

Risk index

2.0 and 2.2 16v EW10/EW12

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

Reviewed on 30 October 202620 sources How we work

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.^[1][2][3][4]

See the 6 of the BMW N54/N55 faults

Is the 2.0 and 2.2 16v EW10/EW12 reliable?

The EW10 (2.0) and EW12 (2.2) are naturally aspirated 16-valve petrol engines with a timing belt, which PSA fitted between 1999 and 2010 to the 206, 307, 406, 407, 607, 807, C4, C5 and C8, among others. According to owners there are no frequent internal failures: the most-cited problems are the ignition coils (the only fault also reported by the press), the exhaust and, on the 2.2, oil consumption.^{[5][6][7][8][9][10][11][12]}

See the of the 2.0 and 2.2 16v EW10/EW12 fault

Side-by-side comparison

Comparison of BMW N54/N55 and 2.0 and 2.2 16v EW10/EW12
Item	BMW N54/N55	2.0 and 2.2 16v EW10/EW12
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	2,979 cm³	—
Timing	Chain	Timing belt (dry)
Power	302–335 hp	135–177 hp
Production	2006–2019^[1][2]	1999–2010^{[5][7][13][14]}
Reliability
Risk index (what is it?)	48Moderate risk	14Low risk
Documented faults	6	1
Of high or critical severity	1	0
Worst severity	High severity	Medium severity
Main faults	High severity: High-pressure fuel pump (HPFP) failure Medium severity: N54 piezoelectric injector failure Medium severity: Turbo wastegate noise and failure	Medium severity: Faulty ignition coils
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	2.0 16v 136 hp (EW10J4, RFN/RFR, 1999-2005)^{[5][6][8][9][15][16]} 2.0 16v VVT 140-143 hp (EW10A, RFJ, 2004-2011)^[10][11][17]
With cautionVersions to be cautious about	N54B30 302 hp (2006-2010)^[1][3][18] N54 322 hp (2008-2013)^[1][3][18] N54 335 hp (2011-2016)^[1][3][18] N55B30M0 302 hp (2009-2018)^[2][4][19] N55B30 315 hp (2011-2018)^[2][4][19] N55B30O0 322 hp (2014-2016)^[2][4][19] N55HP 335 hp (2013-2015)^[2][4][19]	2.0 16v VVT 177 hp (EW10J4S, RFK, 2003-2008)^[8][15][17] 2.0 HPi 140 hp direct injection (EW10D, RLZ, 2001-2004)^[9][11] 2.2 16v 158-163 hp (EW12J4, 3FZ/3FY, 1999-2010)^{[9][10][12][14][20]}
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

BMW N54/N55

See the 13 models with the BMW N54/N55

2.0 and 2.2 16v EW10/EW12

See the 13 models with the 2.0 and 2.2 16v EW10/EW12

Other comparisons

With the BMW N54/N55

With the 2.0 and 2.2 16v EW10/EW12

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Sources

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

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
PSA EW/DW engineWikipedia (inglés) · Other source · consulted 8 October 2026
Peugeot 307 Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · published 2 November 2022 · consulted 8 October 2026 · in German
Peugeot 407 problems (reseña de Graham Smith)CarsGuide (Australia) · Motoring press · published 17 March 2015 · consulted 8 October 2026
Tous les problèmes sur Peugeot 307 2001-2008 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Peugeot 406 1995-2004 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Peugeot 407 2004-2010 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën C5 2001-2008 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën C8 2002-2015 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Peugeot 406Wikipedia (inglés) · Other source · consulted 8 October 2026
Peugeot 307 2.0 16V 140 ch: courroie de distribution (intervalo, tiempo y riesgo)Mecazen · Other source · consulted 8 October 2026 · in French
Tous les problèmes sur Peugeot 206 1998-2006 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën Xsara Picasso 1999-2010 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Tous les problèmes sur Citroën C4 2004-2010 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
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
Tous les problèmes sur Peugeot 607 2000-2011 (opiniones por motorización)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French