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1.7 CDTI vs 2.2 HDi: which engine is more reliable?

According to our risk index, the 1.7 CDTI carries less risk than the 2.2 HDi: 36/100 versus 48/100 (both moderate risk). The 1.7 CDTI has 3 documented serious faults, the main one being «Dual-mass flywheel and clutch wear»; the 2.2 HDi has 3 documented serious faults, the main one being «DPF clogging with additive, especially on the 128-138 hp version».

Risk index

1.7 CDTI

36

Moderate risk · 3 serious faults

Lower risk

Risk index

2.2 HDi

48

Moderate risk · 3 serious faults

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

18 sourcesHow 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 2.2 HDi reliable?

This is a diesel derived from the 2.0 HDi that PSA and Ford shared in large saloons and MPVs (407, 607, 807, C5, C6, C8) and that Land Rover and Ford used under their own names (TDCi, TD4, SD4) in the Mondeo IV, the Freelander 2 and the first Evoque. According to fiches-auto it does not suffer chronically from the turbo or dual-mass flywheel problems of smaller HDi engines, but the 128-138 hp version does have a recurring problem of DPF clogging.[8][9][10][11]

See the 4 of the 2.2 HDi faults

Side-by-side comparison

Comparison of 1.7 CDTI and 2.2 HDi
1.7 CDTI2.2 HDi
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,686 cm³2,179 cm³
TimingTiming belt (dry)Timing belt (dry)
Power100–130 hp128–204 hp
Production2003–2015[1][12][13]2000–2015[8][10][14][15][16]
Reliability
Risk index (what is it?)36Moderate risk48Moderate risk
Documented faults54
Of high or critical severity33
Worst severityCritical severityHigh severity
Main faults
  1. High severity: Dual-mass flywheel and clutch wear
  2. High severity: Clogged diesel particulate filter (DPF) and oil dilution
  3. Critical severity: Timing belt: risk of serious failure if not changed on time
  1. High severity: DPF clogging with additive, especially on the 128-138 hp version
  2. High severity: Turbo faults, somewhat more frequent on the sequential twin-turbo versions
  3. High severity: Piezo injector wear and failure
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNone
  • 2.2 HDi 150-156 (single variable-geometry turbo, 2006-2012)[17][18]
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]
  • 2.2 HDi 128-138 (DW12 TED4, single turbo, 2000-2006)[11]
  • 2.2 HDi 170-175 twin-turbo (DW12 BTED4, 2005-2010)[11][15]
  • 2.2 HDi 190-204 twin-turbo (DW12 C, 2010-2015)[15]
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

1.7 CDTI

See the 9 models with the 1.7 CDTI

2.2 HDi

See the 13 models with the 2.2 HDi

Other comparisons

With the 1.7 CDTI

With the 2.2 HDi

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. Circle L engineWikipedia (inglés) · Other source · consulted 27 September 2026
  2. Essai complet Opel Astra (H) : fiabilité et avisFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  3. Essai complet Opel Zafira 2 : fiabilité et avisFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  4. Essai complet Opel Meriva : fiabilité et avisFiches-auto.fr · Owners' forum · consulted 27 September 2026 · in French
  5. Opel Astra H (A04): Probleme & KaufberatungGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
  6. Opel Meriva A: ProblemeGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
  7. Opel Meriva B: ProblemeGebrauchtwagenberater.de · Other source · consulted 27 September 2026 · in German
  8. PSA EW/DW engineWikipedia (inglés) · Other source · consulted 27 September 2026
  9. Ford MondeoWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  10. Land Rover FreelanderWikipedia (francés) · Other source · consulted 27 September 2026 · in French
  11. Essai, avis et fiabilité des 2,2 HDI 136 chevauxFiches-Auto · Motoring press · consulted 27 September 2026 · in French
  12. Opel Corsa DWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  13. Opel MerivaWikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  14. Range Rover EvoqueWikipedia (inglés) · Other source · consulted 27 September 2026
  15. Essai, avis et fiabilité des 2,2 HDI 204 chevauxFiches-Auto · Motoring press · consulted 27 September 2026 · in French
  16. Essai Citroën C5 Exclusive + 2.2 HDI 200 TourerActu Automobile · Motoring press · published 2011 · consulted 27 September 2026 · in French
  17. Essai Peugeot 4007 2.2 HDi DCS 6Caradisiac · Motoring press · published 7 April 2010 · consulted 27 September 2026 · in French
  18. Citroën C-CrosserWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish