1.6 HDi vs BMW N57: which engine is more reliable?

According to our risk index, the 1.6 HDi carries less risk than the BMW N57: 71/100 (high risk) versus 87/100 (very high risk). The 1.6 HDi has 2 documented serious faults, the main one being «Turbo failure through lack of lubrication (carbon deposits and union filter)»; the BMW N57 has 3 documented serious faults, the main one being «EGR cooler leaks with risk of engine fire».

Risk index

1.6 HDi

High risk · 2 serious faults

Lower risk

Risk index

BMW N57

Very high risk · 3 serious faults

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

Reviewed on 27 September 202629 sources How we work

Is the 1.6 HDi reliable?

It is an efficient diesel, but its 16-valve versions (2004-2011) have a serious weak point: the turbo is starved of lubrication by carbon deposits from the oil, often made worse by leaks at the injector washers. The 8V engines (from 2010) improved, although you need to watch the 2010-2011 belt and the injectors, and on the BlueHDi the AdBlue tank.^{[1][2][3][4][5][6][7][8][9]}

See the 7 of the 1.6 HDi faults

Is the BMW N57 reliable?

The BMW N57 (2008-2019, successor to the M57) is a six-cylinder diesel that is mechanically robust in the basics, but it shares with the N47 and B47 the EGR cooler covered by BMW's service campaign for engine fire risk, and it inherits from the N47 the timing chain at the rear of the block, with wear cases documented mainly from 200,000 km. Without a clear history of these checks, it is worth buying with some caution.^[10][11][12]

See the 4 of the BMW N57 faults

Side-by-side comparison

Comparison of 1.6 HDi and BMW N57
Item	1.6 HDi	BMW N57
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,560 cm³	2,993 cm³
Timing	Timing belt (dry)	Chain
Power	75–120 hp	204–381 hp
Production	2004–2019^{[4][6][13][14][15][16][17]}	2008–2019^[10][18]
Reliability
Risk index (what is it?)	71High risk	87Very high risk
Documented faults	7	4
Of high or critical severity	2	3
Worst severity	High severity	Critical severity
Main faults	High severity: Turbo failure through lack of lubrication (carbon deposits and union filter) High severity: Timing belt failure and premature wear Medium severity: AdBlue tank and pump fault (1.6 BlueHDi)	Critical severity: EGR cooler leaks with risk of engine fire Critical severity: Rear timing chain wear High severity: Loss of thrust on twin-turbo versions due to the vacuum circuit or the actuator
Most expensive documented repair	up to €1,500Turbo failure through lack of lubrication (carbon deposits and union filter)Estimate^{[1][19][20][21][22][23][24]}	No reliable data
Which versions to buy
BuyRecommended versions	1.6 HDi / e-HDi 92/95 8V (DV6D, 2009-2016)^[25][26]	None
With cautionVersions to be cautious about	1.6 HDi 75/90 16V (DV6BTED4 / DV6ATED4, 2004-2011)^[2][3][25] 1.6 HDi 110 16V DPF (DV6TED4, 2004-2011)^[2][6][25] 1.6 HDi / e-HDi 112/115 8V (DV6C, 2010-2015)^[5][7] 1.6 BlueHDi 75/100/120 (DV6FE / DV6FD / DV6FC, 2013-2019)^[8][16][27]	N57D30 204-211 hp, single turbo (U0/UL, 2010-2013)^[12][28] N57D30 245-258 hp, single turbo (O0/O1, 2008-2019)^[12][28] N57D30 299-313 hp twin turbo (T0/T1, 2009-2019)^[28][29]
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

1.6 HDi

See the 47 models with the 1.6 HDi

BMW N57

See the 10 models with the BMW N57

Other comparisons

With the 1.6 HDi

With the BMW N57

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.Häufige Schäden und die professionelle Reparatur (Turbolader PSA 1,6 HDi)Krafthand · Motoring press · published 6 June 2013 · consulted 26 September 2026 · in German
2.Boletín de servicio: sustitución del turbo en motores DV6 (versión reducida de la Información de servicio nº 77)Turbotec · Technical documentation · consulted 26 September 2026 · in Spanish
3.Diesel : la liste des pannes récurrentes des moteurs HDi, dCi, TDI... (1.6 HDi)L'argus · Motoring press · published 28 October 2014 · consulted 26 September 2026 · in French
4.Fiabilité Citroën Peugeot. Le bloc 1.6 HDi 8 soupapes est-il fiable ?L'argus · Motoring press · published 23 March 2015 · consulted 26 September 2026 · in French
5.Fiabilité Citroën Peugeot. Le bloc 1.6 HDi 8 soupapes est-il fiable ? (1.6 HDi 112/115)L'argus · Motoring press · published 23 March 2015 · consulted 26 September 2026 · in French
6.Essai, avis et fiabilité des 1.6 HDI 110 chFiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French
7.Essai, avis et fiabilité des 1.6 HDI 112 chFiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French
8.OCU y BEUC consiguen que Stellantis amplíe la garantía de los coches con AdBlueOCU · Consumer association · published 27 December 2024 · consulted 26 September 2026 · in Spanish
9.El Grupo PSA lanza la gama de motores Blue HDikm77 · Motoring press · published 16 September 2013 · consulted 26 September 2026 · in Spanish
10.BMW N57Wikipedia (inglés) · Other source · consulted 27 September 2026
11.Motor BMW B47 - Reparación EspecializadaDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
12.324.000 diésel de BMW tendrán que pasar por el taller en Europa, por un posible riesgo de incendio en la EGRDiariomotor · Motoring press · published 8 August 2018 · consulted 27 September 2026 · in Spanish
13.Prueba de consumo (202): Peugeot Partner Outdoor 1.6-BlueHDi 120 CVkm77 · Motoring press · published 24 December 2015 · consulted 26 September 2026 · in Spanish
14.Motor PSA DVWikipedia (es) · Other source · consulted 26 September 2026 · in Spanish
15.Peugeot DV6TED4 engine: specifications and applicationsMyMotorList · Technical documentation · consulted 26 September 2026
16.Fiabilité 1.6 BlueHDIFiches-Auto.fr · Motoring press · published 9 December 2021 · consulted 26 September 2026 · in French
17.Motor Peugeot DV6FDTED: especificaciones y aplicacionesMyMotorList · Technical documentation · consulted 26 September 2026 · in Spanish
18.BMW N57Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
19.Turbo intercambio Garrett 753420 motor 1.6HDi 1.6TDCI 1.6DFG Automoción · Technical documentation · consulted 26 September 2026 · in Spanish
20.Turbo Garrett 753420 (GT1544V) para 1.6 HDI 110 CVAML Turbos · Technical documentation · consulted 26 September 2026 · in Spanish
21.Tubo de engrase PSA 1.6 HDI 110 CV + filtro (OP10049COMP)Electromotor Lantejuela · Technical documentation · consulted 26 September 2026 · in Spanish
22.¿Cuál es el precio de la mano de obra en los talleres de las 10 marcas más vendidas en España?km77 · Motoring press · published 30 December 2024 · consulted 26 September 2026 · in Spanish
23.La doble tarifa de la mano de obra en los talleres españoles: lo que dice su tablón vs. lo que realmente ingresanInfotaller · Motoring press · published June 2026 · consulted 26 September 2026 · in Spanish
24.¿Estás cobrando lo justo en tu taller? Así está la mano de obra por hora en 2025Infotaller · Motoring press · published 9 September 2025 · consulted 26 September 2026 · in Spanish
25.Fiabilité 1.6 HDIFiches-Auto.fr · Motoring press · published 22 April 2024 · consulted 26 September 2026 · in French
26.Essai, avis et fiabilité des 1.6 HDI 92 chFiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French
27.Adblue : problèmes en pagaille ?Fiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French
28.Motor BMW N57 - Reparación EspecializadaDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
29.Motor BMW N57: problemas, modelos y qué revisarCarexam · Motoring press · consulted 27 September 2026 · in Spanish