Honda e:HEV / i-MMD vs 1.4 Turbo: which engine is more reliable?

According to our risk index, the Honda e:HEV / i-MMD carries less risk than the 1.4 Turbo: 34/100 versus 45/100 (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 Turbo has 2 documented serious faults, the main one being «Early engine failure from a cracked piston».

Risk index

Honda e:HEV / i-MMD

Moderate risk · 2 serious faults

Lower risk

Risk index

1.4 Turbo

Moderate risk · 2 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 202615 sources How 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 Turbo reliable?

The Opel/Vauxhall 1.4 Turbo (GM Small Gasoline Engine; A14NET, A14NEL, B14NET and, from 2015-2016, B14NEH/B14XFT/D14XFT) powered much of Opel's petrol range between 2009 and 2018, with outputs from 120 to 152 hp. There is no documented timing chain failure pattern, but there is one for the water pump and thermostat housing, the ignition coils, turbocharger wear and, in fewer cases, early engine failure from a cracked piston.^{[4][5][6][7][8][9]}

See the 4 of the 1.4 Turbo faults

Side-by-side comparison

Comparison of Honda e:HEV / i-MMD and 1.4 Turbo
Item	Honda e:HEV / i-MMD	1.4 Turbo
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	1,364 cm³
Timing	Chain	Chain
Power	109–184 hp	120–152 hp
Production	since 2018^[1][10]	2009–2018^{[4][11][12][13]}
Reliability
Risk index (what is it?)	34Moderate risk	45Moderate risk
Documented faults	3	4
Of high or critical severity	2	2
Worst severity	High severity	Critical severity
Main faults	High severity: Cracked high-pressure fuel pump (Honda campaign 6YP) High severity: Faulty fuel pump impeller on the 2019-2020 CR-V hybrid (Honda 6FE campaign) Low severity: 12 V battery going flat and hybrid system failing to start	Critical severity: Early engine failure from a cracked piston High severity: Whistling, loss of power and turbocharger wear Medium severity: Coolant leak from the water pump or thermostat housing
Most expensive documented repair	up to €25012 V battery going flat and hybrid system failing to startPublished figure^[1]	up to €600Ignition coil failurePublished figure^[6]
Which versions to buy
BuyRecommended versions	e:HEV 1.5 (LEB-H5) 109-131 hp system output (Jazz IV, HR-V III)^[1][10]	None
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][14]	1.4 Turbo 120-140 hp (A14NET/A14NEL/B14NET, indirect injection, 2009-2015)^[5][6][7][8] 1.4 Turbo 150-152 hp (B14NEH/B14XFT/D14XFT, from 2015-2016)^[9][15]
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

Honda e:HEV / i-MMD

1.4 Turbo

See the 10 models with the 1.4 Turbo

Other comparisons

With the Honda e:HEV / i-MMD

With the 1.4 Turbo

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Sources

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

Sistema híbrido Honda e:HEV (i-MMD): problemas, fiabilidad y coches que lo llevanMotordex · Technical documentation · consulted 29 October 2026 · in Spanish
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
Fiabilité Honda HR-V (2022): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
Opel Astra JWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Opel Astra 3 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Mokka : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Meriva 2 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Zafira Tourer : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Astra 5 : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Honda LEB-H5 (1.5 i-MMD e:HEV): experiencias, problemas, consumo y consejos de compraAutohints · Technical documentation · consulted 29 October 2026 · in Spanish
GM Family 0 engineWikipedia (inglés) · Other source · consulted 27 September 2026
Opel InsigniaWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Opel MokkaWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
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
Opel Adam : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French