Skip to content
MotorFiable

B4D

1.0 SCe 70/75 (B4D, 2014-2024) engine: faults and reliability

Renault 1.0 SCe (B4D) version

With caution

No serious or systemic fault is documented in the reliability sources consulted (117 combined reviews across the three cars). It is worth checking the clutch, with a pattern of slipping or juddering when cold cited independently on the Dacia Sandero II, the Dacia Logan II and the Renault Twingo III, and, in the specific case of the Sandero II, keeping an eye on oil consumption.[1][2][3]

Years
2014–2024
Power
70–75 hp
Faults that affect it
4
0 of high or critical severity
Cars that use it
5
in our database

8 sourcesHow we work

What changes in this version

Low-cost entry-level engine, with no design changes noted in the sources consulted over its time on sale: it arrived with the Twingo III in 2014 (SCe 70) and in 2016 spread to the Dacia Sandero II and the Dacia Logan II (SCe 75) as a replacement for the naturally aspirated 1.2 16v.[4][5][6][7]

Engine codes of this version: B4D.

Faults of the B4D engine

The documented engine faults that affect this version and its years, from most to least important.

  1. 1Medium severityFrequency: OccasionalClutchClutch that slips or judders, especially when coldThe 1.0 SCe can have a clutch that slips or judders, especially with a cold engine. It is the issue that recurs most in the sources consulted, documented independently on the Sandero II, the Logan II and the Twingo III, without being described as a fault that damages the engine.
  2. 2Medium severityFrequency: OccasionalElectronicsJerking, rough idle or warning light from sensors and ignition coilsThe 1.0 SCe can jerk, run unevenly or light up the engine fault warning light because of sensor faults (lambda sensor), ignition coils or injection management. It is a recurring but minority issue in the sources consulted, unrelated to a mechanical problem with the engine block.
  3. 3Low severityFrequency: OccasionalLubricationHigher-than-normal oil consumption (especially on the Dacia Sandero II)The Dacia Sandero II with the 1.0 SCe can use more oil than normal, with one documented case of 750 ml every 5,000 km; on the Dacia Logan II and the Renault Twingo III with the same engine this problem is not described in a comparable proportion.
  4. 4Low severityFrequency: RareTimingChain-driven timing: no documented pattern of faultsUnlike engines with a timing belt, the 1.0 SCe barely records any mentions of the timing in the sources consulted: 1 case out of 117 combined reviews of the Sandero II, the Logan II and the Twingo III, with no further detail. It is not a fault that we can document as a pattern on this engine.

Cars fitted with the B4D engine

Open each car to see all its faults with this engine and what to check before buying it.

Dacia

Renault

Smart

Frequently asked questions

Is the B4D engine reliable?

Our verdict is “With caution”. No serious or systemic fault is documented in the reliability sources consulted (117 combined reviews across the three cars). It is worth checking the clutch, with a pattern of slipping or juddering when cold cited independently on the Dacia Sandero II, the Dacia Logan II and the Renault Twingo III, and, in the specific case of the Sandero II, keeping an eye on oil consumption.[1][2][3]

What faults does the B4D engine have?

The documented ones that affect this version, by importance: clutch that slips or judders, especially when cold (medium severity), jerking, rough idle or warning light from sensors and ignition coils (medium severity), higher-than-normal oil consumption (especially on the Dacia Sandero II) (low severity) and chain-driven timing: no documented pattern of faults (low severity).

Which cars use the B4D engine?

Renault Twingo III (2014–2024), Dacia Sandero II (2016–2020), Dacia Logan II (2016–2020), Smart Fortwo (2014–2019) and Smart Forfour (2014–2019).[1][2][3][5][6][7][8]

Are you buying a car with the B4D engine?

We will put you in touch with a partner only if you authorise it in the form.

Do you have a car with this engine? Tell us which faults you have had and at how many kilometres. Report your fault.

Sources

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

  1. Fiabilité et pannes de la Dacia Sandero 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  2. Fiabilité et pannes du Dacia Logan 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  3. Fiabilité et pannes de la Renault Twingo 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  4. List of Renault enginesWikipedia (inglés) · Other source · consulted 27 September 2026
  5. Dacia SanderoWikipedia (inglés) · Other source · consulted 27 September 2026
  6. Dacia LoganWikipedia (inglés) · Other source · consulted 27 September 2026
  7. Renault TwingoWikipedia (inglés) · Other source · consulted 27 September 2026
  8. Mercedes-Benz M281 engine (applications)Wikipedia (en) · Other source · consulted 30 October 2026