1.0 T3 and 1.3 T4 FireFly Turbo vs 1.2 16v: 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 1.2 16v: 18/100 (low risk) versus 36/100 (moderate risk). The 1.0 T3 and 1.3 T4 FireFly Turbo has no documented serious faults; the 1.2 16v has 1 documented serious fault, the main one being «Damaged head gasket and coolant loss».

Risk index

1.0 T3 and 1.3 T4 FireFly Turbo

Low risk · 0 serious faults

Lower risk

Risk index

1.2 16v

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 202619 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 1.2 16v reliable?

The 1.2 16v (D4F) and its 8-valve predecessor, the D7F, are simple naturally aspirated engines, used for over two decades as the entry-level option in Renault and Dacia cars, with a reputation for reliability: the reliability pages consulted document no catastrophic failures and no oil consumption. The most-cited problems are ignition coils and sensors and, on higher-mileage cars, the head gasket.^[4][5][6][7]

See the 5 of the 1.2 16v faults

Side-by-side comparison

Comparison of 1.0 T3 and 1.3 T4 FireFly Turbo and 1.2 16v
Item	1.0 T3 and 1.3 T4 FireFly Turbo	1.2 16v
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,332 cm³	1,149 cm³
Timing	Chain	Timing belt (dry)
Power	100–180 hp	60–76 hp
Production	since 2018^[8]	2001–2020^{[9][10][11][12]}
Reliability
Risk index (what is it?)	18Low risk	36Moderate risk
Documented faults	2	5
Of high or critical severity	0	1
Worst severity	Medium severity	High 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: Damaged head gasket and coolant loss Medium severity: Ignition coil failure (misfires, engine warning light) Medium severity: Probe and sensor faults (crankshaft position, throttle body)
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][13] 1.3 GSE T4 Turbo plug-in hybrid 4xe (130-180 hp from the petrol engine, since 2021)^[14][15]	1.2 16v 75/76 (D4F, 2001-2020)^{[4][5][6][7][16][17][18][19]} 1.2 16v 60 (D4F 708, Twingo I, 2004-2007)^[11]
With cautionVersions to be cautious about	1.0 GSE T3 Turbo 100-120 hp (FireFly, since 2018)^[1][2]	None
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

1.2 16v

See the 11 models with the 1.2 16v

Other comparisons

With the 1.0 T3 and 1.3 T4 FireFly Turbo

With the 1.2 16v

Compare other engines

First engine

Second engine

That is the comparison you are viewing: change one of the two engines.

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 et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia Sandero 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Maxi-fiche fiabilité : la Renault Twingo 2Caradisiac · Motoring press · consulted 27 September 2026 · in French
Fiat Global Small EngineWikipedia (inglés) · Other source · consulted 29 October 2026
Moteur D RenaultWikipédia (francés) · Other source · consulted 27 September 2026 · in French
Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Renault TwingoWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Renault Clio IIWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
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
Fiabilité et pannes de la Renault KangooFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia LoganFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia SanderoFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia Logan 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French