1.7 CDTI vs 2.0/2.2 D-4D: which engine is more reliable?

According to our risk index, the 1.7 CDTI carries less risk than the 2.0/2.2 D-4D: 36/100 (moderate risk) versus 77/100 (very high risk). The 1.7 CDTI has 3 documented serious faults, the main one being «Dual-mass flywheel and clutch wear»; the 2.0/2.2 D-4D has 1 documented serious fault, the main one being «Warped cylinder head gasket and oil consumption on the 2.2 D-4D».

Risk index

1.7 CDTI

Moderate risk · 3 serious faults

Lower risk

Risk index

2.0/2.2 D-4D

Very high 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 1.7 CDTI reliable?

The 1.7 CDTI (Isuzu, 2003-2015) is a simple, widely used diesel, but it has built up accounts of soot-fouled EGR valves and injectors, a clogged diesel particulate filter (DPF) with oil dilution, wear of the dual-mass flywheel and clutch, and of the Hitachi-brand alternator; it also requires the timing belt to be changed every 150,000 km or 6 years to avoid a serious failure.^{[1][2][3][4][5][6][7]}

See the 5 of the 1.7 CDTI faults

Is the 2.0/2.2 D-4D reliable?

No: the 2.0/2.2 D-4D family is among the most problematic Toyota diesels. The 2.2 block (2AD-FTV and 2AD-FHV D-CAT) has a large number of cases of warped cylinder head gaskets and oil consumption or dilution in the Avensis, RAV4, Auris, Corolla Verso and Verso; the EGR valve and injectors fail frequently across the whole family, and the D-CAT filter clogs up if the car is not driven regularly on open roads.^{[8][9][10][11]}

See the 4 of the 2.0/2.2 D-4D faults

Side-by-side comparison

Comparison of 1.7 CDTI and 2.0/2.2 D-4D
Item	1.7 CDTI	2.0/2.2 D-4D
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,686 cm³	—
Timing	Timing belt (dry)	Chain
Power	100–130 hp	116–177 hp
Production	2003–2015^[1][12][13]	2005–2018^{[14][15][16][17][18]}
Reliability
Risk index (what is it?)	36Moderate risk	77Very high risk
Documented faults	5	4
Of high or critical severity	3	1
Worst severity	Critical severity	Critical severity
Main faults	High severity: Dual-mass flywheel and clutch wear High severity: Clogged diesel particulate filter (DPF) and oil dilution Critical severity: Timing belt: risk of serious failure if not changed on time	Critical severity: Warped cylinder head gasket and oil consumption on the 2.2 D-4D Medium severity: EGR valve clogged with soot Medium severity: Injector wear and failure
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	None
With cautionVersions to be cautious about	1.7 CDTI 100-101 hp (Z17DTH, 2003-2007)^[6][7] 1.7 CDTI 110 hp (Z17DTJ/A17DTJ/A17DTC/A17DTE, 2007-2014)^[6][7] 1.7 CDTI 125 hp (Z17DTR/A17DTR, 2006-2013)^[2][3] 1.7 CDTI 130 hp (A17DTS, 2010-2015)^[6][7]	2.0 D-4D (1AD-FTV, 116-126 hp, 2005-2018)^[8][19]
AvoidVersions to avoid	None	2.2 D-4D (2AD-FTV, 136-150 hp, 2005-2015)^{[8][9][10][11][19][20][21]} 2.2 D-4D D-CAT (2AD-FHV, 174-177 hp, 2005-2015)^[9][19][20]

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

1.7 CDTI

See the 7 models with the 1.7 CDTI

2.0/2.2 D-4D

See the 9 models with the 2.0/2.2 D-4D

Other comparisons

With the 1.7 CDTI

With the 2.0/2.2 D-4D

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Sources

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

Circle L engineWikipedia (inglés) · Other source · consulted 27 September 2026
Essai complet Opel Astra (H) : fiabilité et avisFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Essai complet Opel Zafira 2 : fiabilité et avisFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Essai complet Opel Meriva : fiabilité et avisFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
Opel Astra H (A04): Probleme & KaufberatungGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
Opel Meriva A: ProblemeGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
Opel Meriva B: ProblemeGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
Toyota Avensis (2003-2009) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Avensis (2008-2018) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota RAV4 (2006-2012) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota RAV4 (2013-2019) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Opel Corsa DWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Opel MerivaWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Toyota AD engineWikipedia · Other source · consulted 27 September 2026
Toyota AvensisWikipedia · Other source · consulted 27 September 2026
Toyota AvensisWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Toyota AurisWikipedia · Other source · consulted 27 September 2026
Toyota VersoWikipedia · Other source · consulted 27 September 2026
Toyota Auris (2007-2012) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Corolla Verso : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Toyota Verso : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French