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1.6 CRDi vs 2.2 JTDm Multijet II: which engine is more reliable?

According to our risk index, the 2.2 JTDm Multijet II carries less risk than the 1.6 CRDi: 36/100 (moderate risk) versus 70/100 (high risk). The 1.6 CRDi has 4 documented serious faults, the main one being «MHSG belt tensioner and crankshaft pulley failure (48V mild hybrid)»; the 2.2 JTDm Multijet II has 2 documented serious faults, the main one being «Diesel leak from the fuel filter gasket».

Risk index

1.6 CRDi

70

High risk · 4 serious faults

Risk index

2.2 JTDm Multijet II

36

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

22 sourcesHow we work

Is the 1.6 CRDi reliable?

The U2 D4FB (2009-2018) is a generally robust diesel if well maintained, with known turbo failures in the early units and timing chain problems from 120,000-150,000 km. Its successor, the Smartstream (U3 D4FE, from 2018), has a good reputation, except in the 48V mild hybrid version, which has a belt tensioner and crankshaft pulley fault that can destroy the engine.[1][2][3]

See the 6 of the 1.6 CRDi faults

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).[4][5][6][7][8][9]

See the 4 of the 2.2 JTDm Multijet II faults

Side-by-side comparison

Comparison of 1.6 CRDi and 2.2 JTDm Multijet II
1.6 CRDi2.2 JTDm Multijet II
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,582 cm³2,143 cm³
TimingChainTiming belt (dry)
Power90–136 hp136–210 hp
Productionsince 2009[1][10][11][12]since 2016[13][14][15][16][17]
Reliability
Risk index (what is it?)70High risk36Moderate risk
Documented faults64
Of high or critical severity42
Worst severityCritical severityHigh severity
Main faults
  1. Critical severity: MHSG belt tensioner and crankshaft pulley failure (48V mild hybrid)
  2. Critical severity: Timing chain stretch
  3. High severity: Premature variable-geometry turbo (VGT) failure
  1. High severity: Diesel leak from the fuel filter gasket
  2. High severity: Alternator cable touching the exhaust gas recirculation pipe (fire risk)
  3. Medium severity: Engine oil leaks
Most expensive documented repairup to €1,800Particulate filter (DPF) blocked in urban usePublished figure[18]No reliable data
Which versions to buy
BuyRecommended versions
  • Smartstream 1.6 CRDi U3 (D4FE, 115-136 hp, without mild hybrid, from 2018)[2][19]
None
With cautionVersions to be cautious about
  • 1.6 CRDi U2 (D4FB, 90-136 hp, sold in Spain from 2010 to ~2018)[1][20][21]
  • Smartstream 1.6 CRDi 48V mild hybrid (D4FE MHEV, 136 hp, from ~2019)[3][22]
  • 2.2 JTDm Euro 6 (136-210 hp, 2016-2019)[4][6][7][8][9]
  • 2.2 JTDm Euro 6d with AdBlue (136-210 hp, 2019 onwards)[5]
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

1.6 CRDi

See the 16 models with the 1.6 CRDi

2.2 JTDm Multijet II

Other comparisons

With the 1.6 CRDi

With the 2.2 JTDm Multijet II

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.

  1. Motor Kia y Hyundai 1.6 CRDI (D4FB): ficha tecnica, problemas y tuningMotordinámico · Technical documentation · consulted 26 September 2026 · in Spanish
  2. Kia Ceed III: Bekannte Probleme & RückrufeGebrauchtwagenberater · Other source · consulted 26 September 2026 · in German
  3. Kia / Hyundai 1.6 CRDi MHEV Engine FailuresDOHC (especialista en reconstrucción de motores) · Technical documentation · consulted 26 September 2026
  4. Alfa Romeo Stelvio Probleme und SchwachstellenGebrauchtwagenberater.de · Motoring press · consulted 8 October 2026 · in German
  5. Alfa Romeo Stelvio: opinia i test 100 tys. kmAuto Świat · Motoring press · published May 2024 · consulted 8 October 2026 · in another language
  6. Fiabilité Alfa Romeo Stelvio, pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
  7. Fiabilité Alfa Romeo Giulia, pannes et témoignagesFiches-auto.fr · Owners' forum · consulted 8 October 2026 · in French
  8. Alfa Romeo Giulia usata: pregi e difettiAlvolante · Motoring press · consulted 8 October 2026 · in Italian
  9. Rappels Alfa Romeo StelvioFiches-auto.fr · Other source · consulted 8 October 2026 · in French
  10. Hyundai U engineWikipedia · Other source · consulted 26 September 2026
  11. Hyundai Smartstream engineWikipedia · Other source · consulted 26 September 2026
  12. Hyundai i30 Kombi 1.6 CRDi 48V-Mildhybrid Trend (10/20-01/22): Technische Daten, Bilder, PreiseADAC · Technical documentation · consulted 26 September 2026 · in German
  13. Alfa Romeo Giulia (952)Wikipedia (en) · Other source · consulted 8 October 2026
  14. Alfa Romeo StelvioWikipedia (en) · Other source · consulted 8 October 2026
  15. Alfa Romeo Giulia (2016)Wikipedia (it) · Other source · consulted 8 October 2026 · in Italian
  16. Alfa Romeo Stelvio: kits de correa de distribución (2.2 diésel)Alfa Workshop · Technical documentation · consulted 9 October 2026
  17. Zahnriemenwechsel Alfa Romeo StelvioCarWiki.de · Other source · consulted 8 October 2026 · in German
  18. Kia Ceed 1.6 Crdi Problemas | Fallos y averías más frecuentesTotalRenting · Other source · consulted 26 September 2026 · in Spanish
  19. Kia Ceed im TÜV-Check 2026: Schwachstellen, Mängel und ProblemeAUTO BILD · Motoring press · published 2026 · consulted 26 September 2026 · in German
  20. Kia and Hyundai 1.6 CRDI (D4FB) engineEngineDNA · Other source · consulted 26 September 2026
  21. Best Hyundai Kia 1.6 CRDI Mods & Upgrades Guide to D4FB TuningTorqueCars · Other source · consulted 26 September 2026
  22. KIA SPORTAGE 2023 - vehicle recallsGOV.UK (Driver and Vehicle Standards Agency) · Official body · consulted 26 September 2026