Skip to content
MotorFiable
en

1.0 T3 and 1.3 T4 FireFly Turbo vs 1.5 K15B (Jimny): which engine is more reliable?

According to our risk index, the 1.5 K15B (Jimny) carries less risk than the 1.0 T3 and 1.3 T4 FireFly Turbo: 14/100 versus 18/100 (both low risk). The 1.0 T3 and 1.3 T4 FireFly Turbo has no documented serious faults; the 1.5 K15B (Jimny) has no documented serious faults.

Risk index

1.0 T3 and 1.3 T4 FireFly Turbo

18

Low risk · 0 serious faults

Risk index

1.5 K15B (Jimny)

14

Low risk · 0 serious faults

Lower risk

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

13 sourcesHow 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 1.5 K15B (Jimny) reliable?

The 1.5 K15B in the Suzuki Jimny is a 102 hp naturally aspirated four-cylinder with a timing chain, simple and with no documented faults of its own. The only thing recorded in Europe is a 2018-2020 recall for the fuel pump, precautionary and with a definitive remedy.[4][5][6]

See the of the 1.5 K15B (Jimny) fault

Side-by-side comparison

Comparison of 1.0 T3 and 1.3 T4 FireFly Turbo and 1.5 K15B (Jimny)
1.0 T3 and 1.3 T4 FireFly Turbo1.5 K15B (Jimny)
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,332 cm³1,462 cm³
TimingChainChain
Power100–180 hp102 hp
Productionsince 2018[7]since 2018[8][9][10]
Reliability
Risk index (what is it?)18Low risk14Low risk
Documented faults21
Of high or critical severity00
Worst severityMedium severityMedium severity
Main faults
  1. Medium severity: Oil consumption and premature turbo wear on the 1.0 T3 and 1.3 T4
  2. Medium severity: Jerking and MultiAir block failures on the 1.0 T3
  1. Medium severity: Fuel pump with resin impeller that swells (recall)
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • 1.3 GSE T4 Turbo 150-180 hp (FireFly, since 2018)[1][11]
  • 1.3 GSE T4 Turbo plug-in hybrid 4xe (130-180 hp from the petrol engine, since 2021)[12][13]
  • 1.5 K15B 102 hp (Jimny IV, 2018-present)[4][5][6]
With cautionVersions to be cautious about
  • 1.0 GSE T3 Turbo 100-120 hp (FireFly, since 2018)[1][2]
None
AvoidVersions to avoidNoneNone

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

1.5 K15B (Jimny)

Other comparisons

With the 1.0 T3 and 1.3 T4 FireFly Turbo

With the 1.5 K15B (Jimny)

Compare other engines

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.

  1. Fiabilité Jeep: témoignages de propriétairesfiches-auto.fr · Other source · consulted 29 October 2026 · in French
  2. Fiabilité Fiat: témoignages de propriétairesfiches-auto.fr · Other source · consulted 29 October 2026 · in French
  3. Broken chain in Firefly 1.0 engineFiat Forum · Owners' forum · consulted 30 October 2026
  4. Problemas Suzuki JimnyTotalrenting · General press · consulted 30 October 2026 · in Spanish
  5. Suzuki Jimny: problemas comunes y llamadas a revisióncar-recalls.eu · Other source · consulted 30 October 2026 · in Spanish
  6. Suzuki Jimny Problemecarwiki.de · General press · consulted 30 October 2026 · in German
  7. Fiat Global Small EngineWikipedia (inglés) · Other source · consulted 29 October 2026
  8. Suzuki K engineWikipedia · Other source · consulted 30 October 2026
  9. Suzuki motor KWikipedia · Other source · consulted 30 October 2026 · in Spanish
  10. Suzuki JimnyWikipedia · Other source · consulted 30 October 2026 · in Spanish
  11. Problemas Jeep CompassTotal Renting · Other source · consulted 29 October 2026 · in Spanish
  12. Jeep Renegade Problemecarwiki.de · Other source · consulted 29 October 2026 · in German
  13. Jeep Renegade 4xe plug-in hybrid reliability and safetyDriving Electric · Motoring press · consulted 29 October 2026