1.2 16v vs 1.4 and 1.6 16v: which engine is more reliable?

According to our risk index, the 1.2 16v carries less risk than the 1.4 and 1.6 16v: 36/100 versus 45/100 (both moderate risk). The 1.2 16v has 1 documented serious fault, the main one being «Damaged head gasket and coolant loss»; the 1.4 and 1.6 16v has 1 documented serious fault, the main one being «Timing belt breakage or premature failure».

Risk index

1.2 16v

Moderate risk · 1 serious fault

Lower risk

Risk index

1.4 and 1.6 16v

Moderate risk · 1 serious fault

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

Reviewed on 27 September 202620 sources How we work

Is the 1.2 16v reliable?

The 1.2 16v (D4F) and its 8-valve predecessor, the D7F, are simple naturally aspirated engines, used for over two decades as the entry-level option in Renault and Dacia cars, with a reputation for reliability: the reliability pages consulted document no catastrophic failures and no oil consumption. The most-cited problems are ignition coils and sensors and, on higher-mileage cars, the head gasket.^[1][2][3][4]

See the 5 of the 1.2 16v faults

Is the 1.4 and 1.6 16v reliable?

The K4J (1.4) and K4M (1.6), both naturally aspirated 16-valve units, are simple and generally reliable petrol engines: no source consulted documents oil consumption or faults that destroy the block. Their most-cited weak point is the ignition coils, followed by the crankshaft sensor and, on versions with a variable valve timing unit, its pulley; a neglected belt can cause serious damage, as one case in the Renault Laguna II documents.^[5][6][7][8]

See the 5 of the 1.4 and 1.6 16v faults

Side-by-side comparison

Comparison of 1.2 16v and 1.4 and 1.6 16v
Item	1.2 16v	1.4 and 1.6 16v
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,149 cm³	—
Timing	Timing belt (dry)	Timing belt (dry)
Power	60–76 hp	75–135 hp
Production	2001–2020^{[9][10][11][12]}	since 1998^[10][13][14]
Reliability
Risk index (what is it?)	36Moderate risk	45Moderate risk
Documented faults	5	5
Of high or critical severity	1	1
Worst severity	High severity	High severity
Main faults	High severity: Damaged head gasket and coolant loss Medium severity: Ignition coil failure (misfires, engine warning light) Medium severity: Probe and sensor faults (crankshaft position, throttle body)	Medium severity: Ignition coil failure High severity: Timing belt breakage or premature failure Medium severity: Crankshaft position sensor failure
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	1.2 16v 75/76 (D4F, 2001-2020)^{[1][2][3][4][15][16][17][18]} 1.2 16v 60 (D4F 708, Twingo I, 2004-2007)^[11]	1.6 16V 105-110 hp Dacia, without variable valve timing unit (K4M, 2004-2020)^[8][16]
With cautionVersions to be cautious about	None	1.4 16V 75-100 hp (K4J, 1999-2012)^[1][2] 1.6 16V 110-135 hp with variable valve timing unit (K4M, 1998-2020)^[7][19][20]
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

1.2 16v

See the 11 models with the 1.2 16v

1.4 and 1.6 16v

See the 11 models with the 1.4 and 1.6 16v

Other comparisons

With the 1.2 16v

With the 1.4 and 1.6 16v

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Sources

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

1.Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
2.Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
3.Fiabilité et pannes du Dacia Sandero 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
4.Maxi-fiche fiabilité : la Renault Twingo 2Caradisiac · Motoring press · consulted 27 September 2026 · in French
5.Fiabilité et pannes de la Renault Mégane 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
6.Fiabilité et pannes du Renault Scénic 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
7.Fiabilité et pannes de la Renault Laguna 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
8.Fiabilité et pannes du Dacia Duster 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
9.Moteur D RenaultWikipédia (francés) · Other source · consulted 27 September 2026 · in French
10.Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
11.Renault TwingoWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
12.Renault Clio IIWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
13.Renault K-Type engineWikipedia (inglés) · Other source · consulted 27 September 2026
14.Moteur K RenaultWikipedia (francés) · Other source · consulted 27 September 2026 · in French
15.Fiabilité et pannes de la Renault KangooFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
16.Fiabilité et pannes du Dacia LoganFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
17.Fiabilité et pannes du Dacia SanderoFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
18.Fiabilité et pannes du Dacia Logan 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
19.Fiabilité et pannes de la Renault Mégane 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
20.Fiabilité et pannes du Renault Scénic 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French