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MotorFiable

e-Skyactiv D 3.3 vs 1.5 D (TUD5): which engine is more reliable?

According to our risk index, the 1.5 D (TUD5) carries less risk than the e-Skyactiv D 3.3: 19/100 versus 21/100 (both low risk). The e-Skyactiv D 3.3 has 2 documented serious faults, the main one being «Stalling and restart failures due to control unit software»; the 1.5 D (TUD5) has no documented serious faults.

Risk index

e-Skyactiv D 3.3

21

Low risk · 2 serious faults

Risk index

1.5 D (TUD5)

19

Low risk · 0 serious faults

Lower risk

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

13 sourcesHow we work

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.[1][2][3]

See the 2 of the e-Skyactiv D 3.3 faults

Is the 1.5 D (TUD5) reliable?

A small indirect-injection diesel, slow but simple, with a good reputation for durability once its early problems are behind it. Its documented weak point is the cylinder head gasket, with oil leaks that PSA corrected in stages between 1995 and 1998; other issues (high idle, pump leaks, glow plug connector) are occasional.[4][5][6]

See the 3 of the 1.5 D (TUD5) faults

Side-by-side comparison

Comparison of e-Skyactiv D 3.3 and 1.5 D (TUD5)
e-Skyactiv D 3.31.5 D (TUD5)
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement3,283 cm³—
Timing—Timing belt (dry)
Power254 hp50–58 hp
Productionsince 2022[7][8]1988–2004[9][10][11]
Reliability
Risk index (what is it?)21Low risk19Low risk
Documented faults23
Of high or critical severity20
Worst severityHigh severityMedium severity
Main faults
  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
  1. Medium severity: Oil leaks from the cylinder head gasket and crankshaft seal
  2. Medium severity: Injection pump: high idle and leaks
  3. Low severity: Glow plug faults: corroded connector and glow plugs
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • 3.3 e-Skyactiv D 254 (T3-VPTS, 2022-present)[1][2][3]
  • 1.4 D 50 hp (TUD3Y, 1993-1994 on the 106)[4][6]
  • 1.5 D 54-58 hp (TUD5: VJZ, VJY and VJX, 1994-2003)[4][12][13]
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

e-Skyactiv D 3.3

1.5 D (TUD5)

Other comparisons

With the e-Skyactiv D 3.3

With the 1.5 D (TUD5)

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. DVSA – base de llamadas a revisión (Mazda CX-60)DVSA (Reino Unido) · Official body · consulted 29 October 2026
  2. 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
  3. 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
  4. Peugeot 106: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
  5. Citroën Saxo: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
  6. Quelle citadine d'occasion choisir ?L'argus · Motoring press · consulted 2 November 2026 · in French
  7. Skyactiv (apartado Skyactiv-D 3.3)Wikipedia (inglés) · Other source · consulted 29 October 2026
  8. Mazda CX-60 3.3 e-Skyactiv D MHEV 254ps AWD HomuraPractical Caravan · Motoring press · consulted 29 October 2026
  9. PSA TUD engineWikipedia (en) · Other source · consulted 2 November 2026
  10. Peugeot 106Wikipedia (de) · Other source · consulted 2 November 2026 · in German
  11. Peugeot 106 1.5 D 58 ch: fiabilité du moteurFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  12. Fiabilité Peugeot 106: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  13. Fiabilité Citroën Saxo: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French