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

According to our risk index, the 1.4 D-4D carries less risk than the Skyactiv-D: 48/100 (moderate risk) versus 55/100 (high risk). The Skyactiv-D has 3 documented serious faults, the main one being «Oil dilution with diesel during DPF regenerations»; the 1.4 D-4D has 2 documented serious faults, the main one being «Turbocharger failure».

Risk index

Skyactiv-D

High risk · 3 serious faults

Risk index

1.4 D-4D

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

Reviewed on 27 September 202619 sources How we work

Is the Skyactiv-D reliable?

The Skyactiv-D is a modern and generally reliable diesel, but across its three displacements (1.5, 1.8 and 2.2) it shares oil dilution with diesel fuel during diesel particulate filter regenerations, which means you need to watch the oil level and not stretch oil changes, especially on short journeys; the older 2.2s (2012-2014) also accumulate more turbo and carbon build-up cases.^[1][2][3][4]

See the 4 of the Skyactiv-D 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.^{[5][6][7][8][9]}

See the 6 of the 1.4 D-4D faults

Side-by-side comparison

Comparison of Skyactiv-D and 1.4 D-4D
Item	Skyactiv-D	1.4 D-4D
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	—	1,364 cm³
Timing	Chain	Chain
Power	105–184 hp	75–90 hp
Production	since 2012^[1][10][11]	2002–2018^[5][12]
Reliability
Risk index (what is it?)	55High risk	48Moderate risk
Documented faults	4	6
Of high or critical severity	3	2
Worst severity	Critical severity	High severity
Main faults	High severity: Oil dilution with diesel during DPF regenerations High severity: Turbo wear or failure from lack of lubrication Critical severity: Oil pump chain breakage and camshaft wear	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	2.2 Skyactiv-D 150/175 (SH-VPTS, 2012-2017)^[2][13][14] 2.2 Skyactiv-D 150/175/184 (SH-VPTS, 2017-2021)^[3][15] 1.5 Skyactiv-D 105 (S5-DPTS, 2015-2018)^[4][16] 1.8 Skyactiv-D 116 (S8-DPTS, 2018-present)^[4][17][18]	1.4 D-4D 75 (1ND-TV, 75 hp, 2002-2005)^[7][9] 1.4 D-4D 90 (1ND-TV, 88-90 hp, 2004-2018)^[6][8][19]
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

Skyactiv-D

See the 7 models with the Skyactiv-D

1.4 D-4D

See the 8 models with the 1.4 D-4D

Other comparisons

With the Skyactiv-D

With the 1.4 D-4D

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Sources

Every fact on this page links to its source. If you find an error, let us know.

SkyActivWikipedia (inglés) · Other source · consulted 27 September 2026
Fiabilité Mazda CX-5 (2012-2017)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Mazda 6 (2012-2022)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Mazda CX-3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
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
Mazda CX-5Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Mazda3Wikipedia (inglés) · Other source · consulted 27 September 2026
Toyota Corolla (E120)Wikipedia · Other source · consulted 27 September 2026
Aviso a todos los propietarios de Mazda CX-5 Dieselkm77 · Motoring press · published 22 May 2013 · consulted 27 September 2026 · in Spanish
Mazda6Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Fiabilité Mazda CX-5 II (2017-)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Mazda 3 (2013-2019)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Mazda CX-30Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Mazda 3 (2019-)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Corolla (2002-2007) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French