1.5 VTi-TECH / T-GDI vs 1.2 16v: which engine is more reliable?

According to our risk index, the 1.5 VTi-TECH / T-GDI carries less risk than the 1.2 16v: 7/100 (low risk) versus 36/100 (moderate risk). The 1.5 VTi-TECH / T-GDI has no documented serious faults; the 1.2 16v has 1 documented serious fault, the main one being «Damaged head gasket and coolant loss».

Risk index

1.5 VTi-TECH / T-GDI

Low risk · 0 serious faults

Lower risk

Risk index

1.2 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 202621 sources How we work

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.^{[1][2][3][4][5][6]}

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

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.^{[7][8][9][10]}

See the 5 of the 1.2 16v faults

Side-by-side comparison

Comparison of 1.5 VTi-TECH / T-GDI and 1.2 16v
Item	1.5 VTi-TECH / T-GDI	1.2 16v
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	1,149 cm³
Timing	Chain	Timing belt (dry)
Power	106–170 hp	60–76 hp
Production	since 2017^{[1][2][11][12][13]}	2001–2020^{[14][15][16][17]}
Reliability
Risk index (what is it?)	7Low risk	36Moderate risk
Documented faults	2	5
Of high or critical severity	0	1
Worst severity	Low severity	High severity
Main faults	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)	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)
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	1.5 VTi-TECH naturally aspirated 106 hp (NSE / NSE Plus, from 2017)^[4]	1.2 16v 75/76 (D4F, 2001-2020)^{[7][8][9][10][18][19][20][21]} 1.2 16v 60 (D4F 708, Twingo I, 2004-2007)^[16]
With cautionVersions to be cautious about	1.5 T-GDI turbo 162 hp (GS61H, 2018-2024)^[5][6] 1.5 T-GDI turbo 170 hp (15FDE / 15FKE, from 2024)^[2]	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

1.5 VTi-TECH / T-GDI

MG ZS I

1.2 16v

See the 11 models with the 1.2 16v

Other comparisons

With the 1.5 VTi-TECH / T-GDI

With the 1.2 16v

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Sources

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

1.MG ZS (crossover)Wikipedia (inglés) · Other source · consulted 27 September 2026
2.MG HSWikipedia (inglés) · Other source · consulted 27 September 2026
3.Essai complet : MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
4.Fiabilité et pannes du MG ZSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
5.Fiabilité et pannes du MG eHSFiches-Auto.fr · Motoring press · consulted 27 September 2026 · in French
6.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
7.Fiabilité et pannes de la Renault Clio 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
8.Fiabilité et pannes de la Renault Clio 3Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
9.Fiabilité et pannes du Dacia Sandero 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
10.Maxi-fiche fiabilité : la Renault Twingo 2Caradisiac · Motoring press · consulted 27 September 2026 · in French
11.MG HSWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
12.MG HSWikipedia (francés) · Other source · consulted 27 September 2026 · in French
13.List of General Motors enginesWikipedia (inglés) · Other source · consulted 27 September 2026
14.Moteur D RenaultWikipédia (francés) · Other source · consulted 27 September 2026 · in French
15.Anexo:Motores de RenaultWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
16.Renault TwingoWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
17.Renault Clio IIWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
18.Fiabilité et pannes de la Renault KangooFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
19.Fiabilité et pannes du Dacia LoganFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
20.Fiabilité et pannes du Dacia SanderoFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
21.Fiabilité et pannes du Dacia Logan 2Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French