e-Skyactiv D 3.3 vs 1.4 D-4D: which engine is more reliable?

According to our risk index, the e-Skyactiv D 3.3 carries less risk than the 1.4 D-4D: 21/100 (low risk) versus 48/100 (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 D-4D has 2 documented serious faults, the main one being «Turbocharger failure».

Risk index

e-Skyactiv D 3.3

Low risk · 2 serious faults

Lower risk

Risk index

1.4 D-4D

Moderate risk · 2 serious faults

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

Reviewed on 30 October 202612 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 D-4D reliable?

Yes, generally: the 1.4 D-4D (1ND-TV) is one of Toyota's most widespread small diesels, with a reputation for reasonable reliability. The documented weak points are the injectors, the turbo, the EGR valve, the diesel particulate filter (on versions that have one) and the clutch and dual-mass flywheel assembly, with cases spread between 2002 and 2018 across the Yaris, Corolla, Auris, Urban Cruiser, Verso-S and MINI One D.^{[4][5][6][7][8]}

See the 6 of the 1.4 D-4D faults

Side-by-side comparison

Comparison of e-Skyactiv D 3.3 and 1.4 D-4D
Item	e-Skyactiv D 3.3	1.4 D-4D
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	3,283 cm³	1,364 cm³
Timing	—	Chain
Power	254 hp	75–90 hp
Production	since 2022^[9][10]	2002–2018^[4][11]
Reliability
Risk index (what is it?)	21Low risk	48Moderate risk
Documented faults	2	6
Of high or critical severity	2	2
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	High severity: Turbocharger failure High severity: Oil build-up in the intercooler of the 1.4 D-4D (2014 campaign) Medium severity: Injector wear and failure
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 D-4D 75 (1ND-TV, 75 hp, 2002-2005)^[6][8] 1.4 D-4D 90 (1ND-TV, 88-90 hp, 2004-2018)^[5][7][12]
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 D-4D

See the 8 models with the 1.4 D-4D

Other comparisons

With the e-Skyactiv D 3.3

With the 1.4 D-4D

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
Toyota ND engineWikipedia · Other source · consulted 27 September 2026
Toyota Yaris 2 (2005-2011) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Yaris (1999-2005) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Auris (2007-2012) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Mini Mini (2001-2006) : fiabilité, pannes et rappelsFiches-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
Toyota Corolla (E120)Wikipedia · Other source · consulted 27 September 2026
Toyota Corolla (2002-2007) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French