2.2 JTDm Multijet II vs 2.3 dCi (M9T): which engine is more reliable?

According to our risk index, the 2.3 dCi (M9T) carries less risk than the 2.2 JTDm Multijet II: 32/100 versus 36/100 (both moderate risk). The 2.2 JTDm Multijet II has 2 documented serious faults, the main one being «Diesel leak from the fuel filter gasket»; the 2.3 dCi (M9T) has 2 documented serious faults, the main one being «Clogged or broken EGR valve damaging the turbo».

Risk index

2.2 JTDm Multijet II

Moderate risk · 2 serious faults

Risk index

2.3 dCi (M9T)

Moderate risk · 2 serious faults

Lower risk

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

Reviewed on 9 October 202616 sources How we work

Is the 2.2 JTDm Multijet II reliable?

Alfa Romeo's 2.2 diesel (Giulia and Stelvio) has a good reputation: a German guide rates it as very reliable and a 210 hp Stelvio covered 100,000 km in a test without any faults. The sources mainly record leaks and oil consumption, the odd particulate filter and EGR case, and two one-off campaigns: the fuel filter gasket (2018 Giulia) and the alternator cable next to the EGR pipe (2017-2018 Stelvio).^{[1][2][3][4][5][6]}

See the 4 of the 2.2 JTDm Multijet II faults

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.^[7][8]

See the 5 of the 2.3 dCi (M9T) faults

Side-by-side comparison

Comparison of 2.2 JTDm Multijet II and 2.3 dCi (M9T)
Item	2.2 JTDm Multijet II	2.3 dCi (M9T)
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,143 cm³	2,300 cm³
Timing	Timing belt (dry)	Chain
Power	136–210 hp	100–180 hp
Production	since 2016^{[9][10][11][12][13]}	since 2010^[7][8][14]
Reliability
Risk index (what is it?)	36Moderate risk	32Moderate risk
Documented faults	4	5
Of high or critical severity	2	2
Worst severity	High severity	High severity
Main faults	High severity: Diesel leak from the fuel filter gasket High severity: Alternator cable touching the exhaust gas recirculation pipe (fire risk) Medium severity: Engine oil leaks	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
Most expensive documented repair	No reliable data	up to €2,300Clogged or broken EGR valve damaging the turboPublished figure^[7][15]
Which versions to buy
BuyRecommended versions	None	2.3 dCi 100-125 hp (M9T)^[8] 2.3 dCi 130-145 hp (M9T)^[8]
With cautionVersions to be cautious about	2.2 JTDm Euro 6 (136-210 hp, 2016-2019)^{[1][3][4][5][6]} 2.2 JTDm Euro 6d with AdBlue (136-210 hp, 2019 onwards)^[2]	2.3 dCi 150-180 hp (M9T, some twin-turbo)^[8] 2.3 dCi in the Navara D23 (NP300)^[16]
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

2.2 JTDm Multijet II

2.3 dCi (M9T)

Other comparisons

With the 2.2 JTDm Multijet II

With the 2.3 dCi (M9T)

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Sources

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

Alfa Romeo Stelvio Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
Alfa Romeo Stelvio: opinia i test 100 tys. kmAuto Świat · Motoring press · published May 2024 · consulted 8 October 2026 · in another language
Fiabilité Alfa Romeo Stelvio, pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Fiabilité Alfa Romeo Giulia, pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
Alfa Romeo Giulia usata: pregi e difettiAlvolante · Motoring press · consulted 8 October 2026 · in Italian
Rappels Alfa Romeo StelvioFiches-auto.fr · Other source · consulted 8 October 2026 · in French
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
Alfa Romeo Giulia (952)Wikipedia (en) · Other source · consulted 8 October 2026
Alfa Romeo StelvioWikipedia (en) · Other source · consulted 8 October 2026
Alfa Romeo Giulia (2016)Wikipedia (it) · Other source · consulted 8 October 2026 · in Italian
Alfa Romeo Stelvio: kits de correa de distribución (2.2 diésel)Alfa Workshop · Technical documentation · consulted 9 October 2026
Zahnriemenwechsel Alfa Romeo StelvioCarWiki.de · Other source · consulted 8 October 2026 · in German
Renault Master (tercera generación)Wikipedia · Other source · consulted 5 October 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