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1.7 CRDi vs e-Skyactiv D 3.3: which engine is more reliable?

According to our risk index, the e-Skyactiv D 3.3 carries less risk than the 1.7 CRDi: 21/100 (low risk) versus 38/100 (moderate risk). The 1.7 CRDi has 2 documented serious faults, the main one being «Injectors that lose calibration with mileage»; the e-Skyactiv D 3.3 has 2 documented serious faults, the main one being «Stalling and restart failures due to control unit software».

Risk index

1.7 CRDi

38

Moderate risk · 2 serious faults

Risk index

e-Skyactiv D 3.3

21

Low 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

11 sourcesHow we work

Is the 1.7 CRDi reliable?

The 1.7 CRDi (U2 D4FD, 2010-2018) is a reasonably reliable diesel if it is properly maintained, with one specific documented problem in cold weather: power loss and stalling caused by the turbo actuator, the diesel filter and the glow plugs. It also suffers the emissions-system wear (EGR, DPF) typical of its generation, injectors that can lose calibration and, in a particular mileage range, high-pressure pump failures.[1][2][3]

See the 5 of the 1.7 CRDi faults

Is the e-Skyactiv D 3.3 reliable?

The e-Skyactiv D 3.3 is an inline-six diesel with mild-hybrid assistance that Mazda debuted in the CX-60. It is a very recent engine: there is no in-service reliability data, and what is documented are software recalls (stalling, restarting, clutch) fixed at the official dealer.[4][5][6]

See the 2 of the e-Skyactiv D 3.3 faults

Side-by-side comparison

Comparison of 1.7 CRDi and e-Skyactiv D 3.3
1.7 CRDie-Skyactiv D 3.3
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement1,685 cm³3,283 cm³
TimingChain—
Power115–141 hp254 hp
Production2010–2018[1][7][8][9]since 2022[10][11]
Reliability
Risk index (what is it?)38Moderate risk21Low risk
Documented faults52
Of high or critical severity22
Worst severityHigh severityHigh severity
Main faults
  1. High severity: Injectors that lose calibration with mileage
  2. High severity: High-pressure fuel pump failure
  3. Medium severity: Seized turbo actuator (VGT) and power loss when cold
  1. High severity: Stalling and restart failures due to control unit software
  2. High severity: Clutch between engine and electric motor that does not re-engage after braking
Most expensive documented repairup to €2,000High-pressure fuel pump failurePublished figure[3]No reliable data
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • 1.7 CRDi U2 (D4FD, 115-141 hp, sold in Spain 2010-2018)[2][3]
  • 3.3 e-Skyactiv D 254 (T3-VPTS, 2022-present)[4][5][6]
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 CRDi

See the 8 models with the 1.7 CRDi

e-Skyactiv D 3.3

Other comparisons

With the 1.7 CRDi

With the e-Skyactiv D 3.3

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. Hyundai U engineWikipedia · Other source · consulted 27 September 2026
  2. Kia Sportage 1.7 Crdi Problemas | Fallos y averías más frecuentesTotalRenting · Other source · consulted 27 September 2026 · in Spanish
  3. Hyundai iX35 1.7 Crdi Problemas | Fallos y averías más frecuentesTotalRenting · Other source · consulted 27 September 2026 · in Spanish
  4. DVSA – base de llamadas a revisión (Mazda CX-60)DVSA (Reino Unido) · Official body · consulted 29 October 2026
  5. Mazda CX-60 (2022 – 2024): engine stall (Safety Gate SR/01913/25)Car-Recalls.eu · Official body · published 23 May 2025 · consulted 29 October 2026
  6. Mazda CX-60: The engine not responding to the accelerator after stopping (KBA 14131R)Car-Recalls.eu · Official body · published 11 August 2025 · consulted 29 October 2026
  7. Kia Sportage - Timing Belt or Timing Chain?cochesconcadena.com · Technical documentation · consulted 27 September 2026
  8. Hyundai Tucson 2015 | Precios, datos y equipamientoskm77 · Technical documentation · consulted 27 September 2026 · in Spanish
  9. KIA Sportage 2016 | Precios, datos y equipamientoskm77 · Technical documentation · consulted 27 September 2026 · in Spanish
  10. Skyactiv (apartado Skyactiv-D 3.3)Wikipedia (inglés) · Other source · consulted 29 October 2026
  11. Mazda CX-60 3.3 e-Skyactiv D MHEV 254ps AWD HomuraPractical Caravan · Motoring press · consulted 29 October 2026