1.6 HDi vs 1.9 dCi: which engine is more reliable?

According to our risk index, the 1.9 dCi carries less risk than the 1.6 HDi: 67/100 versus 71/100 (both 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 1.9 dCi has 3 documented serious faults, the main one being «Seizure and wear of the big-end bearings».

Risk index

1.6 HDi

High risk · 2 serious faults

Risk index

1.9 dCi

High risk · 3 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 27 September 202631 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 1.9 dCi reliable?

The 1.9 dCi (F9Q) was Renault's first common-rail diesel (1999) and powered a large part of its range, and those of Nissan and Volvo, for more than a decade. It has well-documented weak points: on versions of up to 120 hp built before 2005, the big-end bearings can seize and the turbo tends to degrade around 150,000 km; the injectors, the EGR valve and, on the 120 hp versions, the dual-mass flywheel also fail fairly often.^{[10][11][12][13][14]}

See the 5 of the 1.9 dCi faults

Side-by-side comparison

Comparison of 1.6 HDi and 1.9 dCi
Item	1.6 HDi	1.9 dCi
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,560 cm³	1,870 cm³
Timing	Timing belt (dry)	Timing belt (dry)
Power	75–120 hp	80–130 hp
Production	2004–2019^{[4][6][15][16][17][18][19]}	1999–2011^[20][21][22]
Reliability
Risk index (what is it?)	71High risk	67High risk
Documented faults	7	5
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: Seizure and wear of the big-end bearings High severity: Premature turbocharger wear High severity: Failures of the Delphi direct-injection injectors
Most expensive documented repair	up to €1,500Turbo failure through lack of lubrication (carbon deposits and union filter)Estimate^{[1][23][24][25][26][27][28]}	No reliable data
Which versions to buy
BuyRecommended versions	1.6 HDi / e-HDi 92/95 8V (DV6D, 2009-2016)^[29][30]	None
With cautionVersions to be cautious about	1.6 HDi 75/90 16V (DV6BTED4 / DV6ATED4, 2004-2011)^[2][3][29] 1.6 HDi 110 16V DPF (DV6TED4, 2004-2011)^[2][6][29] 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][18][31]	1.9 dCi 95-120 (F9Q, first generation, 1999-2005)^[12] 1.9 dCi 125-130 (F9Q, Energy dCi, 2005-2011)^[12] 1.9 dCi 80-101 (F9Q, vans and commercial vehicles, 1999-2007)^[10][11]
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 49 models with the 1.6 HDi

1.9 dCi

See the 13 models with the 1.9 dCi

Other comparisons

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With the 1.9 dCi

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Sources

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

Häufige Schäden und die professionelle Reparatur (Turbolader PSA 1,6 HDi)Krafthand · Motoring press · published 6 June 2013 · consulted 26 September 2026 · in German
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
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
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
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
Essai, avis et fiabilité des 1.6 HDI 110 chFiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French
Essai, avis et fiabilité des 1.6 HDI 112 chFiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French
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
El Grupo PSA lanza la gama de motores Blue HDikm77 · Motoring press · published 16 September 2013 · consulted 26 September 2026 · in Spanish
Renault Mégane II (2002 – 2009): Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Renault Scénic II (2003 – 2009) – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Achat d'occasion : faut-il éviter le moteur 1.9 dCi F9Q chez Renault ?Planète Renault · Motoring press · published 24 January 2024 · consulted 27 September 2026 · in French
Diesels : volant moteur défectueuxFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Vanne EGR : problèmes et pannesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Prueba de consumo (202): Peugeot Partner Outdoor 1.6-BlueHDi 120 CVkm77 · Motoring press · published 24 December 2015 · consulted 26 September 2026 · in Spanish
Motor PSA DVWikipedia (es) · Other source · consulted 26 September 2026 · in Spanish
Peugeot DV6TED4 engine: specifications and applicationsMyMotorList · Technical documentation · consulted 26 September 2026
Fiabilité 1.6 BlueHDIFiches-Auto.fr · Motoring press · published 9 December 2021 · consulted 26 September 2026 · in French
Motor Peugeot DV6FDTED: especificaciones y aplicacionesMyMotorList · Technical documentation · consulted 26 September 2026 · in Spanish
Renault F-Type engineWikipedia · Other source · consulted 27 September 2026
Moteur F RenaultWikipédia · Other source · consulted 27 September 2026 · in French
Renault Espace IVWikipedia · Other source · consulted 27 September 2026 · in German
Turbo intercambio Garrett 753420 motor 1.6HDi 1.6TDCI 1.6DFG Automoción · Technical documentation · consulted 26 September 2026 · in Spanish
Turbo Garrett 753420 (GT1544V) para 1.6 HDI 110 CVAML Turbos · Technical documentation · consulted 26 September 2026 · in Spanish
Tubo de engrase PSA 1.6 HDI 110 CV + filtro (OP10049COMP)Electromotor Lantejuela · Technical documentation · consulted 26 September 2026 · in Spanish
¿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
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
¿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
Fiabilité 1.6 HDIFiches-Auto.fr · Motoring press · published 22 April 2024 · consulted 26 September 2026 · in French
Essai, avis et fiabilité des 1.6 HDI 92 chFiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French
Adblue : problèmes en pagaille ?Fiches-Auto.fr · Motoring press · consulted 26 September 2026 · in French