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Honda e:HEV / i-MMD vs 1.4 and 1.6 TU3/TU5: which engine is more reliable?

According to our risk index, the Honda e:HEV / i-MMD carries less risk than the 1.4 and 1.6 TU3/TU5: 34/100 versus 36/100 (both moderate risk). The Honda e:HEV / i-MMD has 2 documented serious faults, the main one being «Cracked high-pressure fuel pump (Honda campaign 6YP)»; the 1.4 and 1.6 TU3/TU5 has 1 documented serious fault, the main one being «Head gasket damaged after overheating».

Risk index

Honda e:HEV / i-MMD

34

Moderate risk · 2 serious faults

Lower risk

Risk index

1.4 and 1.6 TU3/TU5

36

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

12 sourcesHow we work

Is the Honda e:HEV / i-MMD reliable?

The Honda e:HEV hybrid system (formerly i-MMD) has no serious, widespread faults documented in the sources consulted. The most cited issue is the 12 V battery going flat when the car stands unused and, on the 2.0, a recall for the high-pressure fuel pump.[1][2][3]

See the 3 of the Honda e:HEV / i-MMD faults

Is the 1.4 and 1.6 TU3/TU5 reliable?

The TU is one of PSA's most widely built petrol engines: more than 15.6 million units between 1986 and 2014. It is simple (no turbo, no direct injection or particulate filter, belt-driven timing) and has a reputation for durability. The faults owners cite most are cheap wear parts -ignition coils, sensors and thermostat- and not block failures or cylinder head design flaws.[4][5][6][7]

See the 5 of the 1.4 and 1.6 TU3/TU5 faults

Side-by-side comparison

Comparison of Honda e:HEV / i-MMD and 1.4 and 1.6 TU3/TU5
Honda e:HEV / i-MMD1.4 and 1.6 TU3/TU5
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement——
TimingChainTiming belt (dry)
Power109–184 hp75–112 hp
Productionsince 2018[1][8]1994–2014[4][9][10]
Reliability
Risk index (what is it?)34Moderate risk36Moderate risk
Documented faults35
Of high or critical severity21
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Cracked high-pressure fuel pump (Honda campaign 6YP)
  2. High severity: Faulty fuel pump impeller on the 2019-2020 CR-V hybrid (Honda 6FE campaign)
  3. Low severity: 12 V battery going flat and hybrid system failing to start
  1. High severity: Head gasket damaged after overheating
  2. Medium severity: Ignition coils that fail and cause jerking
  3. Medium severity: Thermostat stuck open or closed
Most expensive documented repairup to €25012 V battery going flat and hybrid system failing to startPublished figure[1]No reliable data
Which versions to buy
BuyRecommended versions
  • e:HEV 1.5 (LEB-H5) 109-131 hp system output (Jazz IV, HR-V III)[1][8]
  • TU3 1.4 75 hp 8v (TU3JP/TU3KFX, 1994-2014)[5][6]
  • TU5 1.6 88-90 hp 8v (TU5JP, from 1994)[10][11]
  • TU5 1.6 16v 109-112 hp (TU5JP4/TU5NFU, from 2000)[5][6][7]
With cautionVersions to be cautious about
  • i-MMD 2.0 184 hp system output (CR-V V hybrid)[1][2]
  • e:HEV 2.0 184 hp system output (Civic XI)[2][12]
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

Honda e:HEV / i-MMD

1.4 and 1.6 TU3/TU5

See the 10 models with the 1.4 and 1.6 TU3/TU5

Other comparisons

With the Honda e:HEV / i-MMD

With the 1.4 and 1.6 TU3/TU5

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.

  1. Sistema híbrido Honda e:HEV (i-MMD): problemas, fiabilidad y coches que lo llevanMotordex · Technical documentation · consulted 29 October 2026 · in Spanish
  2. Honda recalls 1.3 million cars: fuel pump fire risk (KBA 14559R)Car-Recalls.eu · Motoring press · published 17 March 2025 · consulted 29 October 2026
  3. Fiabilité Honda HR-V (2022): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
  4. Moteur PSA TUWikipédia (francés) · Other source · consulted 27 September 2026 · in French
  5. Tous les problèmes sur Peugeot 206 (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  6. Tous les problèmes sur Peugeot 307 (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  7. Tous les problèmes sur Citroën Xsara (témoignages)Fiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  8. Honda LEB-H5 (1.5 i-MMD e:HEV): experiencias, problemas, consumo y consejos de compraAutohints · Technical documentation · consulted 29 October 2026 · in Spanish
  9. PSA TU engineWikipedia (inglés) · Other source · consulted 27 September 2026
  10. Peugeot 206Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  11. Citroën XsaraWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  12. Guide d'achat Honda Civic (nueva campaña 6YP, 4.740 híbridos en Francia)L'argus · Motoring press · published 7 January 2025 · consulted 29 October 2026 · in French