Skip to content
MotorFiable

1.5 dCi vs MZR-CD: which engine is more reliable?

According to our risk index, the 1.5 dCi carries less risk than the MZR-CD: 63/100 versus 64/100 (both high risk). The 1.5 dCi has 4 documented serious faults, the main one being «Wear and seizure of the big-end bearings»; the MZR-CD has 3 documented serious faults, the main one being «Timing chain stretch on the 2.2 MZR-CD».

Risk index

1.5 dCi

63

High risk · 4 serious faults

Lower risk

Risk index

MZR-CD

64

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

32 sourcesHow we work

Is the 1.5 dCi reliable?

The post-2010 1.5 dCi engines, especially the 90 hp, have a good record. The Euro 3 and Euro 4 units (2001-2010) carry serious faults: big-end bearings that can wreck the engine, a Delphi pump that fills the injection system with metal filings and, in some 105/110 hp versions, a timing belt and dual-mass flywheel that fail early.[1][2][3][4]

See the 8 of the 1.5 dCi faults

Is the MZR-CD reliable?

The MZR-CD is Mazda's most widespread diesel between 2002 and 2013, fitted to the Mazda3, Mazda6, Mazda5 and CX-7. It is sensitive to short journeys: the injector seals and incomplete DPF regenerations can dilute the oil, and the EGR and intake build up carbon. The 2.2-litre redesign (from 2008), with a timing chain instead of a belt, adds the risk of that chain stretching and damaging the engine.[5][6][7][8]

See the 4 of the MZR-CD faults

Side-by-side comparison

Comparison of 1.5 dCi and MZR-CD
1.5 dCiMZR-CD
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,461 cm³—
TimingTiming belt (dry)Timing belt (dry)
Power55–116 hp105–185 hp
Productionsince 2001[1][9][10][11][12][13][14]2002–2013[15][16][17][18][19]
Reliability
Risk index (what is it?)63High risk64High risk
Documented faults84
Of high or critical severity43
Worst severityCritical severityCritical severity
Main faults
  1. Critical severity: Wear and seizure of the big-end bearings
  2. Critical severity: Premature timing belt failure
  3. High severity: Delphi high-pressure pump that sheds filings and damages the injection
  1. Critical severity: Timing chain stretch on the 2.2 MZR-CD
  2. High severity: Oil dilution from leaking injector seals and DPF regenerations
  3. High severity: Turbocharger wear or failure
Most expensive documented repairup to €2,000Premature dual-mass flywheel failure and clutch problemsPublished figure[20][21]No reliable data
Which versions to buy
BuyRecommended versions
  • 1.5 dCi Energy Euro 6 with NOx trap (90 and 110 hp, 2015-2018)[22][23][24]
  • 1.5 dCi in Mercedes-Benz and Infiniti (OM 607 / OM 608, 2012-2020)[14][25]
None
With cautionVersions to be cautious about
  • 1.5 dCi Euro 4 (68/70, 85/86 and 105/106 hp, 2005-2010)[1][2][3][11]
  • 1.5 dCi Euro 5 with particulate filter (75, 90, 95 and 110 hp, 2010-2015)[1][3][26]
  • 1.5 Blue dCi with SCR and AdBlue (85, 95, 100 and 115 hp, from 2018)[23][27][28]
AvoidVersions to avoid
  • 1.5 dCi Euro 3 (65, 80/82 and 100 hp, 2001-2005)[1][4]
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

1.5 dCi

See the 47 models with the 1.5 dCi

MZR-CD

Other comparisons

With the 1.5 dCi

With the MZR-CD

Compare other engines

That is the comparison you are viewing: change one of the two engines.

Sources

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

  1. Fiabilité du 1.5 dCiFiches-auto.fr · Motoring press · published 19 April 2024 · consulted 26 September 2026 · in French
  2. Fiabilité Renault Clio 3 : que vaut le modèle en occasion ?Caradisiac · Motoring press · published 26 November 2012 · consulted 26 September 2026 · in French
  3. Maxi-fiche fiabilité : que vaut le Renault Scénic 3 en occasion ?Caradisiac · Motoring press · published 2 February 2016 · consulted 26 September 2026 · in French
  4. Maxi-fiche occasion : que vaut le Renault Scénic 2 en seconde main ?Caradisiac · Motoring press · published 29 October 2014 · consulted 26 September 2026 · in French
  5. Fiabilité Mazda 6 (2002-2008)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  6. Fiabilité Mazda 6 (2008-2013)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  7. Mazda 6 I: Bekannte Probleme und Schwachstellengebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  8. Mazda 6 II: Bekannte Probleme und Schwachstellengebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  9. Renault K-Type engineWikipedia · Other source · consulted 26 September 2026
  10. Moteur K RenaultWikipédia · Other source · consulted 26 September 2026 · in French
  11. Fiabilité Renault Mégane 3 : que vaut le modèle en occasion ?Caradisiac · Motoring press · published 25 November 2015 · consulted 26 September 2026 · in French
  12. Mercedes abandonne le 1.5 dCi Renault pour un moteur maison, qui émet plus de CO2 !Caradisiac · Motoring press · published 26 October 2020 · consulted 26 September 2026 · in French
  13. Nissan : le Qashqai reçoit un nouveau moteur dCiCaradisiac · Motoring press · published 14 September 2018 · consulted 26 September 2026 · in French
  14. Estos son los motores Renault que usa MercedesDiariomotor · Motoring press · published 22 December 2019 · consulted 26 September 2026 · in Spanish
  15. Mazda diesel enginesWikipedia (inglés) · Other source · consulted 27 September 2026
  16. Mazda6Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  17. Mazda3Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  18. Mazda5Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  19. Mazda CX-7Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  20. Volante bimasa, averías y precio de sustituciónDiariomotor · Motoring press · published 3 November 2020 · consulted 26 September 2026 · in Spanish
  21. Diesels : volant moteur défectueuxFiches-auto.fr · Owners' forum · published 17 October 2025 · consulted 26 September 2026 · in French
  22. Fiabilité du Renault Kadjar : la maxi-fiche occasion de CaradisiacCaradisiac · Motoring press · published 19 November 2020 · consulted 26 September 2026 · in French
  23. Fiabilité du Dacia Duster 2 : la maxi-fiche occasion de CaradisiacCaradisiac · Motoring press · published 27 April 2022 · consulted 26 September 2026 · in French
  24. Fiabilité du Renault Captur : la maxi-fiche occasion de CaradisiacCaradisiac · Motoring press · published 2 March 2018 · consulted 26 September 2026 · in French
  25. Fiabilité des 180d / 180 CDI MercedesFiches-auto.fr · Motoring press · consulted 26 September 2026 · in French
  26. Fiabilité du Nissan Qashqai 2 : la maxi-fiche occasion de CaradisiacCaradisiac · Motoring press · published 22 December 2017 · consulted 26 September 2026 · in French
  27. Fiabilité du 1.5 Blue dCiFiches-auto.fr · Motoring press · published 18 May 2022 · consulted 26 September 2026 · in French
  28. Maxi-fiche fiabilité - Renault Clio 5 : loin d'être irréprochableCaradisiac · Motoring press · published 19 April 2024 · consulted 26 September 2026 · in French
  29. Fiabilité Mazda 3 (2003-2009)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  30. Japanische Zuverlässigkeit? Ärger mit den Dieseln von Mazda und Toyotagebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  31. Fiabilité Mazda 3 (2009-2013)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  32. Mazda 3 II (2009-2013): Typische Probleme & Schwachstellengebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German