2.0 CDTI vs 2.2 dCi and 3.0 dCi V6: which engine is more reliable?

According to our risk index, the 2.0 CDTI carries less risk than the 2.2 dCi and 3.0 dCi V6: 38/100 versus 46/100 (both moderate risk). The 2.0 CDTI has 2 documented serious faults, the main one being «Turbocharger wear or failure»; the 2.2 dCi and 3.0 dCi V6 has 2 documented serious faults, the main one being «3.0 dCi V6 overheating and expansion tank failures».

Risk index

2.0 CDTI

Moderate risk · 2 serious faults

Lower risk

Risk index

2.2 dCi and 3.0 dCi V6

Moderate risk · 2 serious faults

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 2.0 CDTI reliable?

Unlike the 1.3 and 1.6 CDTI of the same era, the Opel/Vauxhall 2.0 CDTI (2008-2019, 110-210 hp with BiTurbo variants) is an engine with a timing belt rather than a chain. It builds up soot in the injectors and EGR valve, clogs its DPF on short journeys, has a recorded faulty turbo and one engine failure, and its models were among those investigated by Germany's KBA and the Frankfurt public prosecutor over a possible switching-off of the emissions treatment.^{[1][2][3][4][5][6]}

See the 6 of the 2.0 CDTI faults

Is the 2.2 dCi and 3.0 dCi V6 reliable?

Renault's big 2000s diesels, the 2.2 dCi (G9T) and the 3.0 V6 dCi (P9X), have a poor reputation among owners: big-end bearing failures are cited on the 2.2 and overheating on the V6. The sources are mainly forums and the press that reports them, with no official statistics.^[7][8][9]

See the 3 of the 2.2 dCi and 3.0 dCi V6 faults

Side-by-side comparison

Comparison of 2.0 CDTI and 2.2 dCi and 3.0 dCi V6
Item	2.0 CDTI	2.2 dCi and 3.0 dCi V6
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,956 cm³	2,188 cm³
Timing	Timing belt (dry)	Timing belt (dry)
Power	110–210 hp	115–180 hp
Production	2008–2019^[1][10]	2001–2009^[11][12]
Reliability
Risk index (what is it?)	38Moderate risk	46Moderate risk
Documented faults	6	3
Of high or critical severity	2	2
Worst severity	Critical severity	Critical severity
Main faults	High severity: Turbocharger wear or failure Medium severity: Soot build-up in the injectors and EGR valve Medium severity: Clogged particulate filter (DPF) and oil dilution on short journeys	Critical severity: 3.0 dCi V6 overheating and expansion tank failures Critical severity: Big-end bearing failure in the 2.2 dCi (G9T) Medium severity: Blocked EGR valve and turbo and injector faults on the 2.2 dCi (G9T)
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	None
With cautionVersions to be cautious about	2.0 CDTI 110-131 hp (A20DTH/A20DTJ, 2008-2015)^[2][13] 2.0 CDTI 160-170 hp (A20DTH/A20DTJ/B20DTH, 2008-2019)^[3][4] 2.0 BiTurbo CDTI 195 hp (A20DTR, 2011-2015)^[2] 2.0 CDTI BiTurbo 210 hp 4x4 (Insignia B, 2017-2022)^[10]	2.2 dCi 115-150 (G9T)^[8][9] 3.0 dCi V6 180 (P9X)^[7][14]
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

2.0 CDTI

2.2 dCi and 3.0 dCi V6

Other comparisons

With the 2.0 CDTI

With the 2.2 dCi and 3.0 dCi V6

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Sources

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

Opel Insignia AWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Opel Astra (H, J, K): Technische Daten, Abmessungen, AnhängelastGebrauchtwagenberater.de · Technical documentation · consulted 27 September 2026 · in German
Fiabilité Opel Insignia - avis et pannes des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Fiabilité Opel Insignia Grand Sport - avis et pannes des propriétairesFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Opel está de nuevo en el punto de mira por las emisiones con 60.000 coches afectadosMotorpasión · Motoring press · published 16 July 2018 · consulted 27 September 2026 · in Spanish
La Fiscalía alemana registra las instalaciones de Opel en el marco de una investigación sobre emisionesMotorpasión · Motoring press · published 15 October 2018 · consulted 27 September 2026 · in Spanish
Renault Espace et Vel Satis : le 3.0 V6 dCi surchauffeL'argus · Motoring press · published 22 June 2010 · consulted 5 October 2026 · in French
Laguna II : remplacement préventif coussinet de bielle 2.2 dCiPlanèteRenault (foro) · Owners' forum · consulted 5 October 2026 · in French
Avantime : casse moteur 2.2 dCiPlanèteRenault (foro) · Owners' forum · consulted 5 October 2026 · in French
Opel InsigniaWikipedia (inglés) · Other source · consulted 27 September 2026
Renault G-Type engineWikipedia (en) · Other source · consulted 5 October 2026
Renault Vel SatisWikipedia (fr) · Other source · consulted 5 October 2026 · in French
Opel Insignia A – Typische Probleme & KrankheitenGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
Vel Satis I : ma Vel Satis 3.0 dCi Initiale a des problèmesPlanèteRenault (foro) · Owners' forum · consulted 5 October 2026 · in French