1.0 SCe (B4D) vs 1.2 Dualjet and 1.2 VVT: which engine is more reliable?

The 1.0 SCe (B4D) and the 1.2 Dualjet and 1.2 VVT tie on our risk index: 23/100 (low risk). The 1.0 SCe (B4D) has no documented serious faults; the 1.2 Dualjet and 1.2 VVT has no documented serious faults.

Risk index

1.0 SCe (B4D)

Low risk · 0 serious faults

Risk index

1.2 Dualjet and 1.2 VVT

Low risk · 0 serious faults

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

Reviewed on 27 September 202612 sources How we work

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.^[1][2][3]

See the 4 of the 1.0 SCe (B4D) faults

Is the 1.2 Dualjet and 1.2 VVT reliable?

The Suzuki 1.2 VVT and 1.2 Dualjet (K12B/K12C/K12M) is a naturally aspirated petrol engine with a timing chain and indirect injection, fitted since 2008 to the Splash, Swift, Ignis and Baleno, with an SHVS mild-hybrid variant since 2016. It is reliable: there is no serious documented fault with the engine block itself; the main points are a clutch that wears out sooner than expected on some cars and two SHVS recalls that have already been resolved.^{[4][5][6][7][8]}

See the 5 of the 1.2 Dualjet and 1.2 VVT faults

Side-by-side comparison

Comparison of 1.0 SCe (B4D) and 1.2 Dualjet and 1.2 VVT
Item	1.0 SCe (B4D)	1.2 Dualjet and 1.2 VVT
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	999 cm³	—
Timing	Chain	Chain
Power	70–75 hp	82–92 hp
Production	2014–2024^[9][10]	since 2008^[4][5]
Reliability
Risk index (what is it?)	23Low risk	23Low risk
Documented faults	4	5
Of high or critical severity	0	0
Worst severity	Medium severity	Medium severity
Main faults	Medium severity: Clutch that slips or judders, especially when cold Medium severity: Jerking, rough idle or warning light from sensors and ignition coils Low severity: Higher-than-normal oil consumption (especially on the Dacia Sandero II)	Medium severity: Clutch: premature wear and clutch cable anchor failure Medium severity: SHVS mild-hybrid system: recalls for the starter generator belt and software Medium severity: Water pump pulley fixing (2013-2014): recall
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	1.2 VVT 86-92 hp (K12B, one injector per cylinder, 2008-2013)^[7] 1.2 Dualjet non-hybrid 89-91 hp (K12B/K12C, dual injector, 2013-2020)^[8][11][12] 1.2 Dualjet SHVS mild hybrid 82-90 hp (K12C/K12D, since 2016)^[8]
With cautionVersions to be cautious about	1.0 SCe 70/75 (B4D, 2014-2024)^[1][2][3]	None
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

1.0 SCe (B4D)

1.2 Dualjet and 1.2 VVT

See the 7 models with the 1.2 Dualjet and 1.2 VVT

Other comparisons

With the 1.0 SCe (B4D)

With the 1.2 Dualjet and 1.2 VVT

Compare other engines

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Sources

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

Fiabilité et pannes de la Dacia Sandero 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du Dacia Logan 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes de la Renault Twingo 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Suzuki motor KWikipedia · Other source · consulted 27 September 2026 · in Spanish
Suzuki K engineWikipedia · Other source · consulted 27 September 2026
Suzuki Swift (NZ) – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Suzuki Splash (2008–2014) – Bekannte Probleme & KrankheitenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Suzuki Ignis (MF, ab 2016) – Bekannte Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
List of Renault enginesWikipedia (inglés) · Other source · consulted 27 September 2026
Renault TwingoWikipedia (inglés) · Other source · consulted 27 September 2026
Suzuki Ignis : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Suzuki Swift 2 : avis, qualités et défauts des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French