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BMW B58 vs Honda e:HEV / i-MMD: which engine is more reliable?

According to our risk index, the Honda e:HEV / i-MMD carries less risk than the BMW B58: 34/100 versus 38/100 (both moderate risk). The BMW B58 has 1 documented serious fault, the main one being «Failure of the oil pump with a plastic rotor housing»; the Honda e:HEV / i-MMD has 2 documented serious faults, the main one being «Cracked high-pressure fuel pump (Honda campaign 6YP)».

Risk index

BMW B58

38

Moderate risk · 1 serious fault

Risk index

Honda e:HEV / i-MMD

34

Moderate risk · 2 serious faults

Lower risk

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 BMW B58 reliable?

The B58 (3.0 turbo straight-six, since 2015) is considered robust and less troublesome than the N54/N55 it replaced, and the sources do not document widespread internal failures. The known faults are on the periphery: the plastic oil filter housing, crankcase ventilation, gaskets and coolant. On units built before 2021 there are also US reports of an oil pump with a plastic housing.[1][2][3][4]

See the 6 of the BMW B58 faults

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.[5][6][7]

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

Side-by-side comparison

Comparison of BMW B58 and Honda e:HEV / i-MMD
BMW B58Honda e:HEV / i-MMD
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement2,998 cm³—
TimingChainChain
Power290–441 hp109–184 hp
Productionsince 2015[8][9]since 2018[5][10]
Reliability
Risk index (what is it?)38Moderate risk34Moderate risk
Documented faults63
Of high or critical severity12
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Failure of the oil pump with a plastic rotor housing
  2. Medium severity: Oil and coolant leak from the plastic oil filter housing
  3. Medium severity: Failure of the crankcase ventilation PCV valve (integrated in the valve cover)
  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
Most expensive documented repairNo reliable dataup to €25012 V battery going flat and hybrid system failing to startPublished figure[5]
Which versions to buy
BuyRecommended versions
  • B58TU2 381 hp (B58B30M2, since 2022)[2][3]
  • e:HEV 1.5 (LEB-H5) 109-131 hp system output (Jazz IV, HR-V III)[5][10]
With cautionVersions to be cautious about
  • B58 326 hp (B58B30M0, 2015-2019)[2][3][11]
  • B58 340-360 hp (B58B30M0, 2016-2019)[2][3][11]
  • B58TU 333-340 hp (B58B30M1, since 2018)[2][3]
  • B58TU 374 hp (B58B30O1, M340i, M440i and M240i, since 2019)[3]
  • i-MMD 2.0 184 hp system output (CR-V V hybrid)[5][6]
  • e:HEV 2.0 184 hp system output (Civic XI)[6][12]
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

BMW B58

See the 16 models with the BMW B58

Honda e:HEV / i-MMD

Other comparisons

With the BMW B58

With the Honda e:HEV / i-MMD

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Sources

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

  1. The 5 Most Common BMW B58 Engine ProblemsBMW Tuning · Technical documentation · published 7 February 2020 · consulted 9 October 2026
  2. BMW B58 EngineFCP Euro · Technical documentation · consulted 9 October 2026
  3. The Popular BMW B58 Inline-Six Engine Has One Big Achilles HeelThe Autopian · Motoring press · published 14 June 2024 · consulted 9 October 2026
  4. ¿En qué se diferencian los motores B58 y S58 de BMW?Diariomotor · Motoring press · published 27 April 2024 · consulted 9 October 2026 · in Spanish
  5. Sistema híbrido Honda e:HEV (i-MMD): problemas, fiabilidad y coches que lo llevanMotordex · Technical documentation · consulted 29 October 2026 · in Spanish
  6. 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
  7. Fiabilité Honda HR-V (2022): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
  8. BMW B58Wikipedia (inglés) · Other source · consulted 9 October 2026
  9. BMW B58Wikipedia (alemán) · Other source · consulted 9 October 2026 · in German
  10. Honda LEB-H5 (1.5 i-MMD e:HEV): experiencias, problemas, consumo y consejos de compraAutohints · Technical documentation · consulted 29 October 2026 · in Spanish
  11. How A Plastic Part On BMW's B58 Engine Can Turn An Oil Change Into A $3,000 RepairThe Autopian · Motoring press · published 28 March 2025 · consulted 9 October 2026
  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