1.0 T3 and 1.3 T4 FireFly Turbo vs 0.9 TCe: which engine is more reliable?

According to our risk index, the 1.0 T3 and 1.3 T4 FireFly Turbo carries less risk than the 0.9 TCe: 18/100 (low risk) versus 49/100 (moderate risk). The 1.0 T3 and 1.3 T4 FireFly Turbo has no documented serious faults; the 0.9 TCe has 3 documented serious faults, the main one being «Coolant leak at the thermostat housing».

Risk index

1.0 T3 and 1.3 T4 FireFly Turbo

Low risk · 0 serious faults

Lower risk

Risk index

0.9 TCe

Moderate risk · 3 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 1.0 T3 and 1.3 T4 FireFly Turbo reliable?

The FireFly turbo 1.0 T3 and 1.3 T4 show no systemic fault in open sources; there are only isolated cases of jerking with replacement of the MultiAir block on the 1.0 and one engine failure on a 1.3. The evidence is thin and is not a guarantee of reliability.^[1][2][3]

See the 2 of the 1.0 T3 and 1.3 T4 FireFly Turbo faults

Is the 0.9 TCe reliable?

The 0.9 TCe (H4Bt) is a three-cylinder turbo with a good reliability reputation, better than that of its sibling the 1.2 TCe: it does not share the same oil consumption or the same rate of chain problems. Its most-cited weak point is a coolant leak at the thermostat housing, which if ignored can end up damaging the head gasket; chain, turbo and lambda sensor cases appear less often.^[4][5]

See the 5 of the 0.9 TCe faults

Side-by-side comparison

Comparison of 1.0 T3 and 1.3 T4 FireFly Turbo and 0.9 TCe
Item	1.0 T3 and 1.3 T4 FireFly Turbo	0.9 TCe
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,332 cm³	898 cm³
Timing	Chain	Chain
Power	100–180 hp	90 hp
Production	since 2018^[6]	2012–2024^{[4][5][7][8][9]}
Reliability
Risk index (what is it?)	18Low risk	49Moderate risk
Documented faults	2	5
Of high or critical severity	0	3
Worst severity	Medium severity	Critical severity
Main faults	Medium severity: Oil consumption and premature turbo wear on the 1.0 T3 and 1.3 T4 Medium severity: Jerking and MultiAir block failures on the 1.0 T3	High severity: Coolant leak at the thermostat housing Critical severity: Timing chain or tensioner failure High severity: Turbocharger wear or failure
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	1.3 GSE T4 Turbo 150-180 hp (FireFly, since 2018)^[1][10] 1.3 GSE T4 Turbo plug-in hybrid 4xe (130-180 hp from the petrol engine, since 2021)^[11][12]	None
With cautionVersions to be cautious about	1.0 GSE T3 Turbo 100-120 hp (FireFly, since 2018)^[1][2]	0.9 TCe 90 (H4Bt, 2012-2024)^[4][5]
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

1.0 T3 and 1.3 T4 FireFly Turbo

0.9 TCe

See the 8 models with the 0.9 TCe

Other comparisons

With the 1.0 T3 and 1.3 T4 FireFly Turbo

With the 0.9 TCe

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Sources

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

Fiabilité Jeep: témoignages de propriétairesfiches-auto.fr · Other source · consulted 29 October 2026 · in French
Fiabilité Fiat: témoignages de propriétairesfiches-auto.fr · Other source · consulted 29 October 2026 · in French
Broken chain in Firefly 1.0 engineFiat Forum · Owners' forum · consulted 30 October 2026
Fiabilité des 0.9 TCeFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Moteur H Renault-NissanWikipedia (francés) · Other source · consulted 27 September 2026 · in French
Fiat Global Small EngineWikipedia (inglés) · Other source · consulted 29 October 2026
Mercedes-Benz M281 engineWikipedia (inglés) · Other source · consulted 27 September 2026
Renault ClioWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Dacia SanderoWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Problemas Jeep CompassTotal Renting · Other source · consulted 29 October 2026 · in Spanish
Jeep Renegade Problemecarwiki.de · Other source · consulted 29 October 2026 · in German
Jeep Renegade 4xe plug-in hybrid reliability and safetyDriving Electric · Motoring press · consulted 29 October 2026