1.0 SCe (B4D) engine: faults and reliability

The 1.0 SCe (engine code B4D) is an inline three-cylinder petrol engine of 999 cc (71 x 84 mm bore and stroke), naturally aspirated with indirect multipoint injection, designed as a low-cost entry-level engine. Renault presented it in 2014 with the launch of the Twingo III, in the SCe 70 tune (70 hp at 6,000 rpm and 91 Nm at 2,850 rpm), which was later joined by an SCe 75 tune.^[4][5]

Dacia adopted it from the 2016 facelift of the Sandero II and Logan II, replacing the old naturally aspirated 1.2 16v engine, as the entry-level option under the name SCe 75.^[6][7]

It is a different engine, despite the identical trade name, from the more recent "1.0 SCe" (code H4D) that Renault introduced in 2019 within the "H" family of the Renault-Nissan-Mitsubishi Alliance for the Clio V, the Dacia Sandero III and the Logan III, which has its own page on this site. The Renault Clio IV (2012-2019), although this engine is sometimes associated with it, never used it according to the sources consulted: its entry-level naturally aspirated petrol engine remained the 1.2 16v (D4F) throughout its time on sale; the 1.0 SCe only reached the Clio with the fifth generation, already with the more recent H4D engine.^[8][9][10]

The Dacia Duster, in both its generations (2010-2017 and 2017-2024), does not use it either: its naturally aspirated petrol engines are the 1.6 105 (K4M) and the 1.6 SCe 115 (H4M), both four-cylinder and of larger displacement, in addition to its TCe turbo versions; that is why we do not include it as an application of this engine. Among the cars that do use it, the reliability sources consulted do not describe any serious or systemic fault: the most cited issues are the clutch (which can slip or judder when cold) and, more occasionally on the Dacia Sandero II, higher-than-normal oil consumption.^{[1][2][3][11][12]}