2.3 dCi (M9T) vs 2.0/2.2 D-4D: which engine is more reliable?

According to our risk index, the 2.3 dCi (M9T) carries less risk than the 2.0/2.2 D-4D: 32/100 (moderate risk) versus 77/100 (very high risk). The 2.3 dCi (M9T) has 2 documented serious faults, the main one being «Clogged or broken EGR valve damaging the turbo»; 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

2.3 dCi (M9T)

Moderate risk · 2 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 5 October 202617 sources How we work

Is the 2.3 dCi (M9T) reliable?

The 2.3 dCi M9T is a van diesel with good durability if maintenance is kept up. The weak points cited are the EGR and the turbo, the injectors, and the particulate filter in urban use; the sources are mostly opinion websites.^[1][2]

See the 5 of the 2.3 dCi (M9T) 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.^[3][4][5][6]

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

Side-by-side comparison

Comparison of 2.3 dCi (M9T) and 2.0/2.2 D-4D
Item	2.3 dCi (M9T)	2.0/2.2 D-4D
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,300 cm³	—
Timing	Chain	Chain
Power	100–180 hp	116–177 hp
Production	since 2010^[1][2][7]	2005–2018^{[8][9][10][11][12]}
Reliability
Risk index (what is it?)	32Moderate risk	77Very high risk
Documented faults	5	4
Of high or critical severity	2	1
Worst severity	High severity	Critical severity
Main faults	High severity: Clogged or broken EGR valve damaging the turbo Medium severity: Faulty injectors on the 2.3 dCi Medium severity: Diesel particulate filter (DPF) clogged in urban use	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	up to €2,300Clogged or broken EGR valve damaging the turboPublished figure^[1][13]	No reliable data
Which versions to buy
BuyRecommended versions	2.3 dCi 100-125 hp (M9T)^[2] 2.3 dCi 130-145 hp (M9T)^[2]	None
With cautionVersions to be cautious about	2.3 dCi 150-180 hp (M9T, some twin-turbo)^[2] 2.3 dCi in the Navara D23 (NP300)^[14]	2.0 D-4D (1AD-FTV, 116-126 hp, 2005-2018)^[3][15]
AvoidVersions to avoid	None	2.2 D-4D (2AD-FTV, 136-150 hp, 2005-2015)^{[3][4][5][6][15][16][17]} 2.2 D-4D D-CAT (2AD-FHV, 174-177 hp, 2005-2015)^[4][15][16]

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

Cars that each one is fitted to

2.3 dCi (M9T)

2.0/2.2 D-4D

See the 10 models with the 2.0/2.2 D-4D

Other comparisons

With the 2.3 dCi (M9T)

With the 2.0/2.2 D-4D

Compare other engines

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Sources

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

Renault Master III 2.3 dCi 130: fiabilité, pannes et coûtsCarverif · Other source · consulted 5 October 2026 · in French
Fiabilité Renault Master 2.3 dCiCarverif · Other source · consulted 5 October 2026 · in French
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
Renault Master (tercera generación)Wikipedia · Other source · consulted 5 October 2026
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
Fiabilité du Renault Master RT 2.3 dCi: analyse complèteCarverif · Other source · consulted 5 October 2026 · in French
Nissan Navara wymaga zmian systemu oczyszczania spalinAutokatalog.pl · Motoring press · published 23 August 2023 · consulted 5 October 2026 · in another language
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