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2.3 dCi (M9T) vs 2.4 / 2.8 D-4D (GD): which engine is more reliable?

According to our risk index, the 2.4 / 2.8 D-4D (GD) carries less risk than the 2.3 dCi (M9T): 20/100 (low risk) versus 32/100 (moderate risk). The 2.3 dCi (M9T) has 2 documented serious faults, the main one being «Clogged or broken EGR valve damaging the turbo»; the 2.4 / 2.8 D-4D (GD) has no documented serious faults.

Risk index

2.3 dCi (M9T)

32

Moderate risk · 2 serious faults

Risk index

2.4 / 2.8 D-4D (GD)

20

Low risk · 0 serious faults

Lower risk

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

14 sourcesHow 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 2.4 / 2.8 D-4D (GD) reliable?

No serious mechanical faults are documented in the European sources we were able to open: AutoBild saw the 2.8 as more robust than the 3.0 it replaced, although it points to glow plugs that fail early. Its best-documented weak point is the particulate filter, with a lawsuit in Australia but no equivalent recall or legal action in Europe, and there are barely any high-mileage examples from which to judge long-term reliability.[3][4][5]

See the 4 of the 2.4 / 2.8 D-4D (GD) faults

Side-by-side comparison

Comparison of 2.3 dCi (M9T) and 2.4 / 2.8 D-4D (GD)
2.3 dCi (M9T)2.4 / 2.8 D-4D (GD)
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement2,300 cm³—
TimingChainChain
Power100–180 hp150–204 hp
Productionsince 2010[1][2][6]since 2015[7][8][9][10]
Reliability
Risk index (what is it?)32Moderate risk20Low risk
Documented faults54
Of high or critical severity20
Worst severityHigh severityMedium severity
Main faults
  1. High severity: Clogged or broken EGR valve damaging the turbo
  2. Medium severity: Faulty injectors on the 2.3 dCi
  3. Medium severity: Diesel particulate filter (DPF) clogged in urban use
  1. Medium severity: Blocked particulate filter (DPF) due to incomplete regenerations
  2. Medium severity: Variable geometry turbo (VNT) seized by soot
  3. Medium severity: Diesel dilution of the engine oil from interrupted particulate filter regenerations
Most expensive documented repairup to €2,300Clogged or broken EGR valve damaging the turboPublished figure[1][11]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]
  • 2.8 D-4D 204 (1GD-FTV, 204 hp, from 2020)[12]
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)[13]
  • 2.4 D-4D 150 (2GD-FTV, 150 hp, from 2016)[12][14]
  • 2.8 D-4D 177 (1GD-FTV, 177 hp, 2015-2020)[3][4][12]
AvoidVersions to avoidNoneNone

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)

2.4 / 2.8 D-4D (GD)

Other comparisons

With the 2.3 dCi (M9T)

With the 2.4 / 2.8 D-4D (GD)

Compare other engines

That is the comparison you are viewing: change one of the two engines.

Sources

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

  1. Renault Master III 2.3 dCi 130: fiabilité, pannes et coûtsCarverif · Other source · consulted 5 October 2026 · in French
  2. Fiabilité Renault Master 2.3 dCiCarverif · Other source · consulted 5 October 2026 · in French
  3. Toyota Land Cruiser 150: Gebrauchtwagen-TestAUTO BILD · Motoring press · published 20 January 2020 · consulted 9 October 2026 · in German
  4. Toyota Faces Up To $1.5 Billion Payout To Owners Over Diesel Lawsuit In AustraliaCarscoops · Motoring press · published 7 April 2022 · consulted 9 October 2026
  5. DVSA – base de llamadas a revisiónDVSA (Reino Unido) · Official body · consulted 9 October 2026
  6. Renault Master (tercera generación)Wikipedia · Other source · consulted 5 October 2026
  7. Toyota GD engineWikipedia (inglés) · Other source · consulted 9 October 2026
  8. Toyota HiluxWikipedia (inglés) · Other source · consulted 9 October 2026
  9. Allgemeine Daten zum Toyota Land Cruiser 2.8 D-4D (5-Türer) (10/20 - 08/24)ADAC Autokatalog · Technical documentation · consulted 9 October 2026 · in German
  10. Allgemeine Daten zum Toyota Hilux Double Cab 2.4 D-4D Duty 4x4 (08/16 - 09/20)ADAC Autokatalog · Technical documentation · consulted 9 October 2026 · in German
  11. Fiabilité du Renault Master RT 2.3 dCi: analyse complèteCarverif · Other source · consulted 5 October 2026 · in French
  12. Toyota upgrades DPF system, no change on dust issuePractical Motoring · Motoring press · published 27 August 2020 · consulted 9 October 2026
  13. Nissan Navara wymaga zmian systemu oczyszczania spalinAutokatalog.pl · Motoring press · published 23 August 2023 · consulted 5 October 2026 · in another language
  14. DPF regeneration: your questions answeredToyota UK Magazine · Manufacturer · consulted 9 October 2026