e-Skyactiv D 3.3 vs 1.4 HDi: which engine is more reliable?

According to our risk index, the e-Skyactiv D 3.3 carries less risk than the 1.4 HDi: 21/100 (low risk) versus 43/100 (moderate 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 1.4 HDi has 1 documented serious fault, the main one being «Timing belt and water pump».

Risk index

e-Skyactiv D 3.3

Low risk · 2 serious faults

Lower risk

Risk index

1.4 HDi

Moderate risk · 1 serious fault

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

Reviewed on 30 October 202611 sources How 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 1.4 HDi reliable?

It is a small diesel that is generally reliable, but with a very well-documented weakness: the injectors tend to lose their seal over time and let diesel escape. The turbo and the EGR valve also fail on a noticeable minority of units, and there are isolated cases of the crankshaft damper pulley failing at very high mileages. The timing belt does not seem to cause more problems than on any diesel of its era if it is changed on time.^[4][5][6]

See the 5 of the 1.4 HDi faults

Side-by-side comparison

Comparison of e-Skyactiv D 3.3 and 1.4 HDi
Item	e-Skyactiv D 3.3	1.4 HDi
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	3,283 cm³	1,399 cm³
Timing	—	Timing belt (dry)
Power	254 hp	54–92 hp
Production	since 2022^[7][8]	2001–2010^{[4][9][10][11]}
Reliability
Risk index (what is it?)	21Low risk	43Moderate risk
Documented faults	2	5
Of high or critical severity	2	1
Worst severity	High severity	High severity
Main faults	High severity: Stalling and restart failures due to control unit software High severity: Clutch between engine and electric motor that does not re-engage after braking	Medium severity: Injectors that lose their seal and let diesel escape High severity: Timing belt and water pump Medium severity: Premature turbo wear from poor lubrication
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	None
With cautionVersions to be cautious about	3.3 e-Skyactiv D 254 (T3-VPTS, 2022-present)^[1][2][3]	1.4 HDi/TDCi 54/68/70 8V (DV4TD, 2001-2009)^[5][6] 1.4 HDi 90/92 16V (DV4TED4, 2002-2009)^[5][11]
AvoidVersions to avoid	None	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

e-Skyactiv D 3.3

Mazda CX-60

1.4 HDi

See the 12 models with the 1.4 HDi

Other comparisons

With the e-Skyactiv D 3.3

With the 1.4 HDi

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.

DVSA – base de llamadas a revisión (Mazda CX-60)DVSA (Reino Unido) · Official body · consulted 29 October 2026
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
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
Motor PSA DVWikipedia (es) · Other source · consulted 27 September 2026 · in Spanish
Essai, avis et fiabilité des 1.4 HDI 68 chFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
Essai, avis et fiabilité des 1.4 HDI 70 chFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
Skyactiv (apartado Skyactiv-D 3.3)Wikipedia (inglés) · Other source · consulted 29 October 2026
Mazda CX-60 3.3 e-Skyactiv D MHEV 254ps AWD HomuraPractical Caravan · Motoring press · consulted 29 October 2026
Ford Duratorq engineWikipedia (en) · Other source · consulted 27 September 2026
Peugeot DV4TD engine: specifications and applicationsMyMotorList · Technical documentation · consulted 27 September 2026
Peugeot DV4TED4 engine: specifications and applicationsMyMotorList · Technical documentation · consulted 27 September 2026