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1.5 BlueHDi vs 1.9 dCi: which engine is more reliable?

According to our risk index, the 1.9 dCi carries less risk than the 1.5 BlueHDi: 67/100 (high risk) versus 77/100 (very high risk). The 1.5 BlueHDi has 4 documented serious faults, the main one being «Wear and breakage of the 7 mm chain between the camshafts»; the 1.9 dCi has 3 documented serious faults, the main one being «Seizure and wear of the big-end bearings».

Risk index

1.5 BlueHDi

77

Very high risk · 4 serious faults

Risk index

1.9 dCi

67

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

26 sourcesHow we work

Is the 1.5 BlueHDi reliable?

The 1.5 BlueHDi has a serious weak point in engines built from October 2017 to January 2023: the 7 mm chain linking the camshafts can stretch and break. Stellantis has recalled them and covers this fault for 10 years or 240,000 km; engines built up to August 2020 can also suffer AdBlue tank failures, with partial compensation from the manufacturer.[1][2][3][4]

See the 5 of the 1.5 BlueHDi 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.[5][6][7][8][9]

See the 5 of the 1.9 dCi faults

Side-by-side comparison

Comparison of 1.5 BlueHDi and 1.9 dCi
1.5 BlueHDi1.9 dCi
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,499 cm³1,870 cm³
TimingTiming belt (dry)Timing belt (dry)
Power75–130 hp80–130 hp
Productionsince 2017[10][11][12][13][14][15]1999–2011[16][17][18]
Reliability
Risk index (what is it?)77Very high risk67High risk
Documented faults55
Of high or critical severity43
Worst severityCritical severityCritical severity
Main faults
  1. Critical severity: Wear and breakage of the 7 mm chain between the camshafts
  2. Medium severity: AdBlue tank and pump failure
  3. High severity: Seizure of the high-pressure pump and injection system
  1. Critical severity: Seizure and wear of the big-end bearings
  2. High severity: Premature turbocharger wear
  3. High severity: Failures of the Delphi direct-injection injectors
Most expensive documented repairup to €1,500AdBlue tank and pump failurePublished figure[4][19][20][21]No reliable data
Which versions to buy
BuyRecommended versions
  • 1.5 BlueHDi with 8 mm chain (from February 2023)[2][22][23]
None
With cautionVersions to be cautious about
  • 1.5 BlueHDi 75-130 with 7 mm chain (October 2017 - January 2023)[24][25][26]
  • 1.9 dCi 95-120 (F9Q, first generation, 1999-2005)[7]
  • 1.9 dCi 125-130 (F9Q, Energy dCi, 2005-2011)[7]
  • 1.9 dCi 80-101 (F9Q, vans and commercial vehicles, 1999-2007)[5][6]
AvoidVersions to avoidNoneNone

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

1.5 BlueHDi

See the 34 models with the 1.5 BlueHDi

1.9 dCi

See the 13 models with the 1.9 dCi

Other comparisons

With the 1.5 BlueHDi

With the 1.9 dCi

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. 1.5 BlueHDi. Stellantis rappelle 930 000 véhicules et étend la couverture à 10 ansL'argus · Motoring press · published 3 July 2025 · consulted 26 September 2026 · in French
  2. Llaman a revisión a miles de Citroën, Opel, Peugeot, DS y Fiat en España con el motor diésel 1.5 BlueHDiMotorpasión · Motoring press · published 3 July 2025 · consulted 26 September 2026 · in Spanish
  3. Réservoir AdBlue Stellantis. Quels changements dans l'indemnisation des clients français ?L'argus · Motoring press · published 21 December 2024 · consulted 26 September 2026 · in French
  4. OCU y BEUC consiguen que Stellantis amplíe la garantía de los depósitos AdBlue defectuososOCU · Consumer association · published 27 December 2024 · consulted 26 September 2026 · in Spanish
  5. Renault Mégane II (2002 – 2009): Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  6. Renault Scénic II (2003 – 2009) – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  7. 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
  8. Diesels : volant moteur défectueuxFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  9. Vanne EGR : problèmes et pannesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  10. Ford DLD engineWikipedia · Other source · consulted 26 September 2026
  11. Motor DV5Oryx Parts · Technical documentation · published 24 January 2024 · consulted 26 September 2026 · in Spanish
  12. Which Cars Have a Wet Belt? Full UK Engine List (2026)CarOkay · Other source · published 2026 · consulted 26 September 2026
  13. Opel Corsa F: Probleme mit dem Ölbad-Zahnriemen erklärtcarVertical · Other source · published 17 July 2026 · consulted 26 September 2026 · in German
  14. PSA 1.5L BlueHDi: a focus on the DV5 engineSumax · Technical documentation · published July 2025 · consulted 26 September 2026
  15. Timing Belt Kit & Water Pump for Peugeot 1.5 BlueHDi - DV5RLymm Engine Parts · Technical documentation · consulted 26 September 2026
  16. Renault F-Type engineWikipedia · Other source · consulted 27 September 2026
  17. Moteur F RenaultWikipédia · Other source · consulted 27 September 2026 · in French
  18. Renault Espace IVWikipedia · Other source · consulted 27 September 2026 · in German
  19. La OCU quiere tomar medidas ante los problemas del sistema de AdBlue de Citroën y Peugeotcoches.com · Motoring press · published 30 May 2023 · consulted 26 September 2026 · in Spanish
  20. Solución fallo AdBlue Peugeot, Citroën y Opel: evita cambiar el depósitoST Automoción · Other source · published 11 December 2025 · consulted 26 September 2026 · in Spanish
  21. Stellantis amplía las compensaciones por los problemas técnicos de sus depósitos AdBlueMinisterio de Derechos Sociales, Consumo y Agenda 2030 · Official body · consulted 26 September 2026 · in Spanish
  22. 1.5 BlueHDi. Stellantis rappelle plusieurs milliers de véhicules pour un problème d'injectionL'argus · Motoring press · published 14 March 2026 · consulted 26 September 2026 · in French
  23. Europa amplía la llamada a revisión por los graves problemas del motor 1.5 BlueHDi de StellantisAutonoción · Motoring press · consulted 26 September 2026 · in Spanish
  24. Cobertura especial para los 1.5 BlueHDi del Grupo Stellantiscoches.net · Motoring press · published 3 July 2025 · consulted 26 September 2026 · in Spanish
  25. Casse chaîne 1.5 BlueHDi. Stellantis étend sa prise en charge à 7 ans ou 180 000 kmL'argus · Motoring press · published 15 January 2025 · consulted 26 September 2026 · in French
  26. Fiabilité moteur Stellantis 1.5 BlueHDi. Une nouvelle huile pour éviter la casseL'argus · Motoring press · published 14 January 2024 · consulted 26 September 2026 · in French