M271 vs 1.5 VTi-TECH / T-GDI: which engine is more reliable?

According to our risk index, the 1.5 VTi-TECH / T-GDI carries less risk than the M271: 7/100 (low 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 1.5 VTi-TECH / T-GDI has no documented serious faults.

Risk index

M271

High risk · 1 serious fault

Risk index

1.5 VTi-TECH / T-GDI

Low risk · 0 serious faults

Lower risk

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

Reviewed on 30 October 202614 sources How 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 1.5 VTi-TECH / T-GDI reliable?

MG/SAIC's "1.5" covers two different engines: the naturally aspirated VTi-TECH (106 hp), the entry-level engine in the MG ZS, and the turbocharged T-GDI (162-170 hp), found only in the MG HS and as the petrol engine in its plug-in hybrids. Neither has well-documented engine faults in independent sources yet: the complaints published concern electronics, the automatic gearbox and finish, not the engine block.^{[4][5][6][7][8][9]}

See the 2 of the 1.5 VTi-TECH / T-GDI faults

Side-by-side comparison

Comparison of M271 and 1.5 VTi-TECH / T-GDI
Item	M271	1.5 VTi-TECH / T-GDI
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	1,796 cm³	—
Timing	Chain	Chain
Power	122–204 hp	106–170 hp
Production	2002–2015^[2][3]	since 2017^{[4][5][10][11][12]}
Reliability
Risk index (what is it?)	59High risk	7Low risk
Documented faults	4	2
Of high or critical severity	1	0
Worst severity	Critical severity	Low severity
Main faults	Critical severity: Timing chain stretch and wear of the camshaft sprockets Medium severity: Oil leaking from the camshaft adjuster solenoids into the wiring Medium severity: Crankcase ventilation hose under the supercharger: it cracks and lets in false air	Low severity: Jerky or harsh automatic gearbox shifts when cold or at low speed (MG HS) Low severity: Electronic warnings and occasional sensor faults (MG HS)
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	1.5 VTi-TECH naturally aspirated 106 hp (NSE / NSE Plus, from 2017)^[7]
With cautionVersions to be cautious about	M271 Kompressor 1.6/1.8 (KE16/KE18)^[1] M271 EVO 1.8 turbo CGI (DE18 LA)^[1]	1.5 T-GDI turbo 162 hp (GS61H, 2018-2024)^{[8][9][13][14]} 1.5 T-GDI turbo 170 hp (15FDE / 15FKE, from 2024)^[5]
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

M271

See the 7 models with the M271

1.5 VTi-TECH / T-GDI

Other comparisons

With the M271

With the 1.5 VTi-TECH / T-GDI

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Sources

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

Mercedes M271: Typische Probleme und HaltbarkeitGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
Mercedes-Benz M271 engineWikipedia · Other source · consulted 27 September 2026
Mercedes-Benz M 271Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
MG ZS (crossover)Wikipedia (inglés) · Other source · consulted 27 September 2026
MG HSWikipedia (inglés) · Other source · consulted 27 September 2026
Essai complet : MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité et pannes du MG eHSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
MG HS PHEV: guía definitiva de problemas y soluciones del SUV, el híbrido enchufable más vendidoAutopista.es · Motoring press · published 10 November 2025 · consulted 27 September 2026 · in Spanish
MG HSWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
MG HSWikipedia (francés) · Other source · consulted 27 September 2026 · in French
List of General Motors enginesWikipedia (inglés) · Other source · consulted 27 September 2026
MG – Common problems (llamadas a revisión de la UE y del Reino Unido)car-recalls.eu · Other source · consulted 30 October 2026
MG HS SUV (2019-2024) Exclusive 1.5T-GDI 5d: opinión de propietario (10 jun 2022)Parkers · Owners' forum · published 10 June 2022 · consulted 30 October 2026