Skyactiv-G vs 1.0 TCe / SCe: which engine is more reliable?

According to our risk index, the Skyactiv-G carries less risk than the 1.0 TCe / SCe: 25/100 versus 41/100 (both moderate risk). The Skyactiv-G has no documented serious faults; the 1.0 TCe / SCe has 1 documented serious fault, the main one being «LPG (ECO-G) system faults and tank recall».

Risk index

Skyactiv-G

Moderate risk · 0 serious faults

Lower risk

Risk index

1.0 TCe / SCe

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 27 September 202614 sources How we work

Is the Skyactiv-G reliable?

The Skyactiv-G is a naturally aspirated petrol engine that the German specialist press consistently describes as reliable, with no documented pattern of serious engine faults in any Mazda model reviewed. Its weak point, shared with almost any direct-injection petrol engine, is carbon build-up in the intake; in addition, 2017-2020 units had recalls for software and for the fuel pump, since fixed by the manufacturer.^[1][2][3][4]

See the 5 of the Skyactiv-G faults

Is the 1.0 TCe / SCe reliable?

The 1.0 TCe/SCe (H4D/H4Dt) is a simply designed three-cylinder with reasonable reliability. Its most-cited fault is a noise or vibration from the turbo wastegate; the ECO-G (LPG) version adds its own gas-management faults and a 2023 recall over a risk of leaks and fire from the tank. An isolated case of a failed high-pressure pump is also documented, and no oil consumption pattern.^[5][6][7]

See the 4 of the 1.0 TCe / SCe faults

Side-by-side comparison

Comparison of Skyactiv-G and 1.0 TCe / SCe
Item	Skyactiv-G	1.0 TCe / SCe
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	999 cm³
Timing	Chain	Chain
Power	75–187 hp	65–117 hp
Production	since 2011^[1][8]	since 2019^[9][10]
Reliability
Risk index (what is it?)	25Moderate risk	41Moderate risk
Documented faults	5	4
Of high or critical severity	0	1
Worst severity	Medium severity	Critical severity
Main faults	Medium severity: Intake shut-off valve software issue and engine stalling Medium severity: Micro-cracks in the fuel pump impeller Medium severity: ECU programming and loss of power (CX-5 II and Mazda3 IV)	Critical severity: LPG (ECO-G) system faults and tank recall Medium severity: Metallic noise or vibration from the turbo wastegate Medium severity: Failed high-pressure fuel pump (isolated case)
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	1.5 Skyactiv-G (P5-VPS)^[2][11] 2.0 Skyactiv-G (PE-VPS)^[3][4][12] 2.5 Skyactiv-G (PY-VPS)^[3]	1.0 SCe 65/75 (H4D, 2019-present)^[5][13]
With cautionVersions to be cautious about	None	1.0 TCe 90/100 (H4Dt, 2019-present)^[5][13] 1.0 TCe 110 (H4Dt, 2021-present)^[14] 1.0 ECO-G 100 (H4Dt + LPG, 2020-present)^[5][6][14] 1.0 DIG-T / IG-T 100-117 (HR10DDT, Nissan, 2017-present)^[7]
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-G

See the 9 models with the Skyactiv-G

1.0 TCe / SCe

See the 7 models with the 1.0 TCe / SCe

Other comparisons

With the Skyactiv-G

With the 1.0 TCe / SCe

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.

SkyactivWikipedia (inglés) · Other source · consulted 27 September 2026
Mazda 3 (BM/BN, 2013-2019) – Erfahrungen & ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mazda 6 (GJ, III) – Erfahrungen & ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mazda CX-5 II (KF) – Erfahrungen & ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Fiabilité et pannes du Dacia Sandero 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Dacia et Renault – nouveau rappel : fuite du réservoir GPL, risque d'incendie !Motorsactu · Motoring press · published 12 November 2023 · consulted 27 September 2026 · in French
Fiabilité et pannes du Nissan Juke 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
List of Mazda enginesWikipedia (inglés) · Other source · consulted 27 September 2026
Moteur H Renault-NissanWikipedia (francés) · Other source · consulted 27 September 2026 · in French
Nissan JukeWikipedia (inglés) · Other source · consulted 27 September 2026
Mazda 2 (DJ) – Erfahrungen & ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mazda 3 IV (BP) – Erfahrungen & ProblemeGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Fiabilité et pannes de la Renault Clio 5Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia JoggerFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French