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2.4 JTD / JTDm Multijet vs e-Skyactiv D 3.3: which engine is more reliable?

According to our risk index, the e-Skyactiv D 3.3 carries less risk than the 2.4 JTD / JTDm Multijet: 21/100 (low risk) versus 25/100 (moderate risk). The 2.4 JTD / JTDm Multijet has no documented serious faults; the e-Skyactiv D 3.3 has 2 documented serious faults, the main one being «Stalling and restart failures due to control unit software».

Risk index

2.4 JTD / JTDm Multijet

25

Moderate risk · 0 serious faults

Risk index

e-Skyactiv D 3.3

21

Low 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 2.4 JTD / JTDm Multijet reliable?

The five-cylinder 2.4 JTD/JTDm is powerful but more delicate in its 20V version. Auto Świat says the 10V rarely breaks down on its own; on the 20V, owner testimonies for the 200 and 210 hp Alfa 159 pile up mentions of the EGR and particulate filter, and the 200 hp had the manifold flap failure that Fiat corrected in 2007.[1][2]

See the 4 of the 2.4 JTD / JTDm Multijet faults

Is the e-Skyactiv D 3.3 reliable?

The e-Skyactiv D 3.3 is an inline-six diesel with mild-hybrid assistance that Mazda debuted in the CX-60. It is a very recent engine: there is no in-service reliability data, and what is documented are software recalls (stalling, restarting, clutch) fixed at the official dealer.[3][4][5]

See the 2 of the e-Skyactiv D 3.3 faults

Side-by-side comparison

Comparison of 2.4 JTD / JTDm Multijet and e-Skyactiv D 3.3
2.4 JTD / JTDm Multijete-Skyactiv D 3.3
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement2,387 cm³3,283 cm³
TimingTiming belt (dry)—
Power136–210 hp254 hp
Production1998–2011[1][6][7][8][9]since 2022[10][11]
Reliability
Risk index (what is it?)25Moderate risk21Low risk
Documented faults42
Of high or critical severity02
Worst severityMedium severityHigh severity
Main faults
  1. Medium severity: Intake manifold flap failure (swirl flaps)
  2. Medium severity: Clogged or faulty EGR valve on the 2.4 JTD and JTDm
  3. Medium severity: Injector failure and diesel leaks on the 2.4 JTDm
  1. High severity: Stalling and restart failures due to control unit software
  2. High severity: Clutch between engine and electric motor that does not re-engage after braking
Most expensive documented repairup to €800Clogged or faulty EGR valve on the 2.4 JTD and JTDmPublished figure[12]No reliable data
Which versions to buy
BuyRecommended versionsNone
With cautionVersions to be cautious about
  • 2.4 JTDm / Multijet 20V (175-185 hp, 2003-2009)[1][13]
  • 2.4 JTDm / Multijet 20V 200 hp (2005-2011)[1][2]
  • 2.4 JTDm 20V 210 hp (Alfa Romeo, 2007-2010)[1][2][14][15]
  • 3.3 e-Skyactiv D 254 (T3-VPTS, 2022-present)[3][4][5]
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

2.4 JTD / JTDm Multijet

See the 7 models with the 2.4 JTD / JTDm Multijet

e-Skyactiv D 3.3

Other comparisons

With the 2.4 JTD / JTDm Multijet

With the e-Skyactiv D 3.3

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. Silnik 2.4 JTD: mocny i trwały, ale czasem też kapryśnyAuto Świat · Motoring press · published 26 September 2011 · consulted 8 October 2026 · in another language
  2. Fiabilité Alfa-romeo 159 (2005-2012) (428 témoignages)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
  3. DVSA – base de llamadas a revisión (Mazda CX-60)DVSA (Reino Unido) · Official body · consulted 29 October 2026
  4. Mazda CX-60 (2022 – 2024): engine stall (Safety Gate SR/01913/25)Car-Recalls.eu · Official body · published 23 May 2025 · consulted 29 October 2026
  5. Mazda CX-60: The engine not responding to the accelerator after stopping (KBA 14131R)Car-Recalls.eu · Official body · published 11 August 2025 · consulted 29 October 2026
  6. Fiat JTD engineWikipedia · Other source · consulted 8 October 2026
  7. Alfa Romeo Brera (guía del taller)The Alfa Workshop · Other source · consulted 8 October 2026
  8. Alfa Romeo 159Wikipedia (alemán) · Other source · consulted 8 October 2026 · in German
  9. SCHAEFFLER - ALFA ROMEO 159 (939_) 2.4 JTDM (939AXD)Rolling Kft. (catálogo) · Technical documentation · consulted 8 October 2026
  10. Skyactiv (apartado Skyactiv-D 3.3)Wikipedia (inglés) · Other source · consulted 29 October 2026
  11. Mazda CX-60 3.3 e-Skyactiv D MHEV 254ps AWD HomuraPractical Caravan · Motoring press · consulted 29 October 2026
  12. ¿Qué precio tiene cambiar una válvula EGR?RACE (Real Automóvil Club de España) · Other source · published 17 June 2024 · consulted 8 October 2026 · in Spanish
  13. Fiabilité Alfa-romeo 156: pannes par motorisation (2.4 JTD)Fiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
  14. Alfa Romeo 159 2.4 JTD 210 ch 93 000 km (2008, Ti): avis d'un propriétaireFiches-auto.fr · Owners' forum · published 26 January 2013 · consulted 8 October 2026 · in French
  15. Guía de compra del Alfa Romeo 159 de segunda manoDiariomotor · Motoring press · published 9 February 2024 · consulted 8 October 2026 · in Spanish