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MotorFiable

1.5 dCi vs 2.5 / 3.0 D-4D (KD): which engine is more reliable?

The 1.5 dCi and the 2.5 / 3.0 D-4D (KD) tie on our risk index: 63/100 (high risk). The 1.5 dCi has 4 documented serious faults, the main one being «Wear and seizure of the big-end bearings»; the 2.5 / 3.0 D-4D (KD) has 3 documented serious faults, the main one being «Cracked pistons in the 3.0 D-4D (1KD-FTV)».

Risk index

1.5 dCi

63

High risk · 4 serious faults

Risk index

2.5 / 3.0 D-4D (KD)

63

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

30 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 2.5 / 3.0 D-4D (KD) reliable?

Toyota's KD diesels (2.5 D-4D, 2KD-FTV, and 3.0 D-4D, 1KD-FTV) have their best-documented weak points in the injectors: the copper seats of the 2004-2007 units, which can block the oil pickup, and the Denso injectors of the 3.0. The 3.0 of the Euro 4 era also has a record of cracked pistons; for the 2.5 we have only found the injector seal problem.[5][6][7][8][9]

See the 5 of the 2.5 / 3.0 D-4D (KD) faults

Side-by-side comparison

Comparison of 1.5 dCi and 2.5 / 3.0 D-4D (KD)
1.5 dCi2.5 / 3.0 D-4D (KD)
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,461 cm³—
TimingTiming belt (dry)Timing belt (dry)
Power55–116 hp102–190 hp
Productionsince 2001[1][10][11][12][13][14][15]since 2000[5][16][17][18][19]
Reliability
Risk index (what is it?)63High risk63High risk
Documented faults85
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: Cracked pistons in the 3.0 D-4D (1KD-FTV)
  2. Critical severity: Leaking copper injector seats and blocked oil pickup
  3. High severity: Denso injector failure in the 3.0 D-4D (blockage and wear)
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)[15][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][12]
  • 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]
  • 2.5 D-4D 102-120 hp (2KD-FTV, 2005-2011)[7]
  • 2.5 D-4D 144 hp (2KD-FTV, 2011-2016)[7][29]
  • 3.0 D-4D 163-166 hp (1KD-FTV, Land Cruiser J120, 2003-2006)[5][30]
  • 3.0 D-4D 173 hp (1KD-FTV, Euro 4, Land Cruiser J120, 2006-2009)[5][7][9]
  • 3.0 D-4D 171 hp (1KD-FTV, Hilux, 2005-2016)[6][29]
  • 3.0 D-4D 190 hp (1KD-FTV, Euro 5, Land Cruiser J150, 2010-2015)[8][9]
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 48 models with the 1.5 dCi

2.5 / 3.0 D-4D (KD)

Other comparisons

With the 1.5 dCi

With the 2.5 / 3.0 D-4D (KD)

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. Toyota 1KD-FTV 3.0 D-4D: ficha del motor, puntos débiles y fiabilidadMotorReviewer · Technical documentation · consulted 2 November 2026
  6. D4D Toyota HiLux common problems and solutionsUnsealed 4x4 · Motoring press · consulted 2 November 2026
  7. Toyota Hilux (2005 - 2012) used car reviewRAC Drive · Motoring press · published 17 February 2017 · consulted 2 November 2026
  8. Toyota Land Cruiser 150: Gebrauchtwagen-TestAUTO BILD · Motoring press · published 20 January 2020 · consulted 2 November 2026 · in German
  9. 1KD-FTV - piston crackToyota-Club.net · Other source · published October 2015 · consulted 2 November 2026
  10. Renault K-Type engineWikipedia · Other source · consulted 26 September 2026
  11. Moteur K RenaultWikipédia · Other source · consulted 26 September 2026 · in French
  12. Fiabilité Renault Mégane 3 : que vaut le modèle en occasion ?Caradisiac · Motoring press · published 25 November 2015 · consulted 26 September 2026 · in French
  13. 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
  14. Nissan : le Qashqai reçoit un nouveau moteur dCiCaradisiac · Motoring press · published 14 September 2018 · consulted 26 September 2026 · in French
  15. Estos son los motores Renault que usa MercedesDiariomotor · Motoring press · published 22 December 2019 · consulted 26 September 2026 · in Spanish
  16. Toyota KD engineWikipedia (inglés) · Other source · consulted 2 November 2026
  17. Allgemeine Daten zum Toyota Hilux Double Cab 3.0 D-4D Life 4x4 (12/11 - 08/14)ADAC Autokatalog · Technical documentation · consulted 2 November 2026 · in German
  18. Allgemeine Daten zum Toyota Hilux Single Cab 2.5 D-4D 4x2 (12/11 - 08/16)ADAC Autokatalog · Technical documentation · consulted 2 November 2026 · in German
  19. Allgemeine Daten zum Toyota Land Cruiser 3.0 D-4D (5-Türer, 01/11 - 10/13)ADAC Autokatalog · Technical documentation · consulted 2 November 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. Vanliga fel: Toyota Hilux (guía de averías comunes)BilKoll · Other source · consulted 2 November 2026 · in another language
  30. Toyota Land Cruiser 125 D4-DAutofácil · Motoring press · published 2 February 2011 · consulted 2 November 2026 · in Spanish