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M271 vs 1.4 and 1.6 16v: which engine is more reliable?

According to our risk index, the 1.4 and 1.6 16v carries less risk than the M271: 45/100 (moderate risk) versus 59/100 (high risk). The M271 has 1 documented serious fault, the main one being «Timing chain stretch and wear of the camshaft sprockets»; the 1.4 and 1.6 16v has 1 documented serious fault, the main one being «Timing belt breakage or premature failure».

Risk index

M271

59

High risk · 1 serious fault

Risk index

1.4 and 1.6 16v

45

Moderate risk · 1 serious fault

Lower risk

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

15 sourcesHow we work

Is the M271 reliable?

The M271 is the four-cylinder petrol engine Mercedes-Benz fitted from 2002 to 2015, first with a mechanical supercharger (Kompressor) and, from 2009, with a turbo in the EVO revision. It has one well-documented weak point across the range: the timing chain and the camshaft sprockets can wear prematurely, a problem a specialist source describes as persistent even after the EVO redesign.[1][2][3]

See the 4 of the M271 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.[4][5][6][7]

See the 6 of the 1.4 and 1.6 16v faults

Side-by-side comparison

Comparison of M271 and 1.4 and 1.6 16v
M2711.4 and 1.6 16v
Technical data
TypeEngineEngine
FuelPetrolPetrol
Displacement1,796 cm³—
TimingChainTiming belt (dry)
Power122–204 hp75–135 hp
Production2002–2015[2][3]since 1998[8][9][10]
Reliability
Risk index (what is it?)59High risk45Moderate risk
Documented faults46
Of high or critical severity11
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: Timing chain stretch and wear of the camshaft sprockets
  2. Medium severity: Oil leaking from the camshaft adjuster solenoids into the wiring
  3. Medium severity: Crankcase ventilation hose under the supercharger: it cracks and lets in false air
  1. Medium severity: Ignition coil failure
  2. High severity: Timing belt breakage or premature failure
  3. Medium severity: Crankshaft position sensor failure
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNone
  • 1.6 16V 105-110 hp Dacia, without variable valve timing unit (K4M, 2004-2020)[7][11]
With cautionVersions to be cautious about
  • M271 Kompressor 1.6/1.8 (KE16/KE18)[1]
  • M271 EVO 1.8 turbo CGI (DE18 LA)[1]
  • 1.4 16V 75-100 hp (K4J, 1999-2012)[12][13]
  • 1.6 16V 110-135 hp with variable valve timing unit (K4M, 1998-2020)[6][14][15]
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

M271

See the 7 models with the M271

1.4 and 1.6 16v

See the 13 models with the 1.4 and 1.6 16v

Other comparisons

With the M271

With the 1.4 and 1.6 16v

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.

  1. Mercedes M271: Typische Probleme und HaltbarkeitGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
  2. Mercedes-Benz M271 engineWikipedia · Other source · consulted 27 September 2026
  3. Mercedes-Benz M 271Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  4. Fiabilité et pannes de la Renault Mégane 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  5. Fiabilité et pannes du Renault Scénic 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  6. Fiabilité et pannes de la Renault Laguna 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  7. Fiabilité et pannes du Dacia Duster 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  8. Renault K-Type engineWikipedia (inglés) · Other source · consulted 27 September 2026
  9. Moteur K RenaultWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  10. Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
  11. Fiabilité et pannes du Dacia Logan 1Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  12. Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  13. Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  14. Fiabilité et pannes de la Renault Mégane 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  15. Fiabilité et pannes du Renault Scénic 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French