Skip to content
MotorFiable
en

1.9 JTD/Multijet and 2.4 JTD vs 2.3 dCi (M9T): which engine is more reliable?

According to our risk index, the 2.3 dCi (M9T) carries less risk than the 1.9 JTD/Multijet and 2.4 JTD: 32/100 versus 48/100 (both moderate risk). The 1.9 JTD/Multijet and 2.4 JTD has 2 documented serious faults, the main one being «Intake manifold flap failure (swirl effect)»; the 2.3 dCi (M9T) has 2 documented serious faults, the main one being «Clogged or broken EGR valve damaging the turbo».

Risk index

1.9 JTD/Multijet and 2.4 JTD

48

Moderate risk · 2 serious faults

Risk index

2.3 dCi (M9T)

32

Moderate risk · 2 serious faults

Lower risk

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

15 sourcesHow we work

Is the 1.9 JTD/Multijet and 2.4 JTD reliable?

The 1.9 JTD/Multijet (8v and 16v) and the five-cylinder 2.4 JTD were the world's first common rail diesels and have a reputation for robust, long-lived mechanicals. Before buying, check the known faults: the intake manifold flaps and the EGR valve fail or clog with urban use, the turbo and dual-mass flywheel wear with mileage, and the particulate filter on versions that have one clogs if there are not enough long journeys.[1][2][3][4]

See the 6 of the 1.9 JTD/Multijet and 2.4 JTD faults

Is the 2.3 dCi (M9T) reliable?

The 2.3 dCi M9T is a van diesel with good durability if maintenance is kept up. The weak points cited are the EGR and the turbo, the injectors, and the particulate filter in urban use; the sources are mostly opinion websites.[5][6]

See the 5 of the 2.3 dCi (M9T) faults

Side-by-side comparison

Comparison of 1.9 JTD/Multijet and 2.4 JTD and 2.3 dCi (M9T)
1.9 JTD/Multijet and 2.4 JTD2.3 dCi (M9T)
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement—2,300 cm³
TimingTiming belt (dry)Chain
Power78–210 hp100–180 hp
Production1997–2012[1][7][8]since 2010[5][6][9]
Reliability
Risk index (what is it?)48Moderate risk32Moderate risk
Documented faults65
Of high or critical severity22
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Intake manifold flap failure (swirl effect)
  2. High severity: Turbocharger wear or failure
  3. Medium severity: EGR valve blocked by carbon
  1. High severity: Clogged or broken EGR valve damaging the turbo
  2. Medium severity: Faulty injectors on the 2.3 dCi
  3. Medium severity: Diesel particulate filter (DPF) clogged in urban use
Most expensive documented repairup to €1,900Dual-mass flywheel wear on manual gearbox versionsPublished figure[10]up to €2,300Clogged or broken EGR valve damaging the turboPublished figure[5][11]
Which versions to buy
BuyRecommended versionsNone
  • 2.3 dCi 100-125 hp (M9T)[6]
  • 2.3 dCi 130-145 hp (M9T)[6]
With cautionVersions to be cautious about
  • 1.9 JTD/Multijet 8v (78-130 hp, 1997-2010)[2][12][13]
  • 1.9 JTD/Multijet 16v (140-190 hp, 2002-2010)[3][14]
  • 2.4 JTD/Multijet (136-210 hp, 1997-2010)[8][14]
  • 2.3 dCi 150-180 hp (M9T, some twin-turbo)[6]
  • 2.3 dCi in the Navara D23 (NP300)[15]
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

1.9 JTD/Multijet and 2.4 JTD

See the 16 models with the 1.9 JTD/Multijet and 2.4 JTD

2.3 dCi (M9T)

Other comparisons

With the 1.9 JTD/Multijet and 2.4 JTD

With the 2.3 dCi (M9T)

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. Fiat JTD engineWikipedia · Other source · consulted 27 September 2026
  2. Opel Vectra C (2002-2008) – Typische Probleme & SchwachstellenGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
  3. Opel Zafira B (2005-2014) – Typische Probleme & SchwachstellenGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
  4. Alfa Romeo GT: problemas, fallos y averías más frecuentesTotalrenting · Other source · consulted 27 September 2026 · in Spanish
  5. Renault Master III 2.3 dCi 130: fiabilité, pannes et coûtsCarverif · Other source · consulted 5 October 2026 · in French
  6. Fiabilité Renault Master 2.3 dCiCarverif · Other source · consulted 5 October 2026 · in French
  7. Saab 9-3Wikipedia · Other source · consulted 27 September 2026
  8. Fiat CromaWikipedia · Other source · consulted 27 September 2026 · in Spanish
  9. Renault Master (tercera generación)Wikipedia · Other source · consulted 5 October 2026
  10. Opel Zafira 2 : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  11. Fiabilité du Renault Master RT 2.3 dCi: analyse complèteCarverif · Other source · consulted 5 October 2026 · in French
  12. Alfa Romeo 156 : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  13. Alfa Romeo 147 : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  14. Alfa Romeo 159 : les plus et les moinsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  15. Nissan Navara wymaga zmian systemu oczyszczania spalinAutokatalog.pl · Motoring press · published 23 August 2023 · consulted 5 October 2026 · in another language