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BMW B58 vs 1.0 SCe (B4D): which engine is more reliable?

According to our risk index, the 1.0 SCe (B4D) carries less risk than the BMW B58: 23/100 (low risk) versus 38/100 (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 1.0 SCe (B4D) has no documented serious faults.

Risk index

BMW B58

38

Moderate risk · 1 serious fault

Risk index

1.0 SCe (B4D)

23

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

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 1.0 SCe (B4D) reliable?

The 1.0 SCe (B4D) is a simple, low-power (70-75 hp) naturally aspirated three-cylinder engine, with no serious or systemic faults documented. Its most cited issues are a clutch that can slip or judder when cold and, more occasionally on the Dacia Sandero II, higher-than-normal oil consumption; there is no pattern of faults in the chain-driven timing.[5][6][7]

See the 4 of the 1.0 SCe (B4D) faults

Side-by-side comparison

Comparison of BMW B58 and 1.0 SCe (B4D)
BMW B581.0 SCe (B4D)
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement2,998 cm³999 cm³
TimingChainChain
Power290–441 hp70–75 hp
Productionsince 2015[8][9]2014–2024[10][11]
Reliability
Risk index (what is it?)38Moderate risk23Low risk
Documented faults64
Of high or critical severity10
Worst severityHigh severityMedium 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. Medium severity: Clutch that slips or judders, especially when cold
  2. Medium severity: Jerking, rough idle or warning light from sensors and ignition coils
  3. Low severity: Higher-than-normal oil consumption (especially on the Dacia Sandero II)
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versions
  • B58TU2 381 hp (B58B30M2, since 2022)[2][3]
None
With cautionVersions to be cautious about
  • B58 326 hp (B58B30M0, 2015-2019)[2][3][12]
  • B58 340-360 hp (B58B30M0, 2016-2019)[2][3][12]
  • B58TU 333-340 hp (B58B30M1, since 2018)[2][3]
  • B58TU 374 hp (B58B30O1, M340i, M440i and M240i, since 2019)[3]
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

1.0 SCe (B4D)

Other comparisons

With the BMW B58

With the 1.0 SCe (B4D)

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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. Fiabilité et pannes de la Dacia Sandero 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  6. Fiabilité et pannes du Dacia Logan 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  7. Fiabilité et pannes de la Renault Twingo 3Fiches-auto.fr · Motoring press · consulted 27 September 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. List of Renault enginesWikipedia (inglés) · Other source · consulted 27 September 2026
  11. Renault TwingoWikipedia (inglés) · Other source · consulted 27 September 2026
  12. 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