1.6 and 1.8 Ecotec 16v vs 2.3 VR5 (V5): which engine is more reliable?

According to our risk index, the 1.6 and 1.8 Ecotec 16v carries less risk than the 2.3 VR5 (V5): 23/100 (low risk) versus 32/100 (moderate risk). The 1.6 and 1.8 Ecotec 16v has no documented serious faults; the 2.3 VR5 (V5) has 1 documented serious fault, the main one being «Timing chain stretch».

Risk index

1.6 and 1.8 Ecotec 16v

Low risk · 0 serious faults

Lower risk

Risk index

2.3 VR5 (V5)

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 2 November 202618 sources How we work

Is the 1.6 and 1.8 Ecotec 16v reliable?

The 1.6 and 1.8 16v Ecotec (Z16XER/A16XER, Z18XER/A18XER) that Opel fitted between 2005 and 2015 to the Astra H and J, Zafira B, Vectra C and Insignia A have a reputation as reliable naturally aspirated engines: the sources consulted document no serious faults or failure patterns, only minor problems such as ignition coils and, on the 1.8, leaks from the oil cooler or thermostat.^[1][2][3][4]

See the 3 of the 1.6 and 1.8 Ecotec 16v faults

Is the 2.3 VR5 (V5) reliable?

The 2.3-litre VR5 is a naturally aspirated five-cylinder with the timing chain at the rear of the engine. Gebrauchtwagenberater rates it as a buy with no known problems in the Golf IV, but in the Bora it warns that the chain sometimes stretches; AutoHints adds the coils and the plastic coolant parts as points to watch.^[5][6][7][8]

See the 3 of the 2.3 VR5 (V5) faults

Side-by-side comparison

Comparison of 1.6 and 1.8 Ecotec 16v and 2.3 VR5 (V5)
Item	1.6 and 1.8 Ecotec 16v	2.3 VR5 (V5)
Technical data
Type	Engine	Engine
Fuel	Petrol	Petrol
Displacement	—	2,324 cm³
Timing	Timing belt (dry)	Chain
Power	115–140 hp	150–170 hp
Production	2005–2015^{[9][10][11][12]}	1997–2006^[13][14][15]
Reliability
Risk index (what is it?)	23Low risk	32Moderate risk
Documented faults	3	3
Of high or critical severity	0	1
Worst severity	Medium severity	High severity
Main faults	Medium severity: Oil and coolant leak or mixing via the oil cooler (1.8) Medium severity: Coolant loss through the thermostat or water pump Low severity: Ignition coil failures	High severity: Timing chain stretch Medium severity: Faulty ignition coils Medium severity: Coolant leaks from the hoses and thermostat housing
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	1.6 16V Ecotec 115 hp (Z16XER/A16XER, 2006-2015)^[1][2][3] 1.8 16V Ecotec 140 hp (Z18XER/A18XER, 2005-2014)^[1][4][16] 1.6 16V Ecotec 113–124 hp (LDE, Chevrolet Cruze, 2009–2015)^[17][18]	None
With cautionVersions to be cautious about	None	2.3 VR5 10v 150 hp (AGZ; 1997-2001)^[6][7] 2.3 VR5 20v 170 hp (AQN, AZX; 2000-2006)^[6][8]
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

1.6 and 1.8 Ecotec 16v

See the 9 models with the 1.6 and 1.8 Ecotec 16v

2.3 VR5 (V5)

Other comparisons

With the 1.6 and 1.8 Ecotec 16v

With the 2.3 VR5 (V5)

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Sources

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

Opel Insignia A – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
Fiabilité Opel Astra (H): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Opel Zafira 2 (B): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Opel Insignia (A): pannes et témoignagesFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
VW Golf 4: Typische Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · published 2 September 2026 · consulted 2 November 2026 · in German
VW Bora (1J2) – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Motoring press · published 14 July 2022 · consulted 2 November 2026 · in German
Engine 2.3 VR5 (AGZ) 150 HP: Experiences, problems, fuel consumption and used-car buying tipsAutoHints · Technical documentation · published 24 July 2025 · consulted 2 November 2026
Volkswagen 2.3 VR5 20V (AQN): Experiences, problems, fuel consumption and used car buying tipsAutoHints · Technical documentation · published 24 July 2025 · consulted 2 November 2026
Opel Astra HWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Opel ZafiraWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Opel Astra JWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Opel Astra J – Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
VR5 engineWikipedia (inglés) · Other source · consulted 2 November 2026
List of discontinued Volkswagen Group petrol enginesWikipedia (inglés) · Other source · consulted 2 November 2026
VR-MotorWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
Opel Vectra C: ProblemeGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
Chevrolet Cruze (J300, 2008-2016): Typische Probleme & SchwachstellenGebrauchtwagenberater.de · Other source · consulted 2 November 2026 · in German
Fiabilité Chevrolet Cruze (2009-2015): pannes et témoignagesfiches-auto.fr · Motoring press · consulted 2 November 2026 · in French