2.0 HDi vs MZR-CD: which engine is more reliable?

According to our risk index, the 2.0 HDi carries less risk than the MZR-CD: 55/100 versus 64/100 (both high risk). The 2.0 HDi has 2 documented serious faults, the main one being «Variable-geometry turbo failures (actuator, sensors and clogging)»; the MZR-CD has 3 documented serious faults, the main one being «Timing chain stretch on the 2.2 MZR-CD».

Risk index

2.0 HDi

High risk · 2 serious faults

Lower risk

Risk index

MZR-CD

High risk · 3 serious faults

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

Reviewed on 27 September 202622 sources How we work

Is the 2.0 HDi reliable?

It is a robust diesel in its simplest 90 hp version, but the 136 to 140 hp generation with a DPF (2004-2011) concentrates the engine's problems: turbo, DPF, EGR and, above all, a dual-mass flywheel that fails very often. The BlueHDi engines (from 2013) are mechanically more reliable, but add an AdBlue tank that can crystallise; the OCU (Spanish consumer organisation) has reported this fault in Spain and Stellantis covers it with a compensation programme.^[1][2][3][4]

See the 5 of the 2.0 HDi faults

Is the MZR-CD reliable?

The MZR-CD is Mazda's most widespread diesel between 2002 and 2013, fitted to the Mazda3, Mazda6, Mazda5 and CX-7. It is sensitive to short journeys: the injector seals and incomplete DPF regenerations can dilute the oil, and the EGR and intake build up carbon. The 2.2-litre redesign (from 2008), with a timing chain instead of a belt, adds the risk of that chain stretching and damaging the engine.^[5][6][7][8]

See the 4 of the MZR-CD faults

Side-by-side comparison

Comparison of 2.0 HDi and MZR-CD
Item	2.0 HDi	MZR-CD
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	1,997 cm³	—
Timing	Timing belt (dry)	Timing belt (dry)
Power	90–180 hp	105–185 hp
Production	1999–2021^{[1][9][10][11][12]}	2002–2013^{[13][14][15][16][17]}
Reliability
Risk index (what is it?)	55High risk	64High risk
Documented faults	5	4
Of high or critical severity	2	3
Worst severity	High severity	Critical severity
Main faults	High severity: Variable-geometry turbo failures (actuator, sensors and clogging) High severity: DPF clogging on additive-type systems (Eolys/cerine) Medium severity: Premature dual-mass flywheel wear (from 107/110 hp)	Critical severity: Timing chain stretch on the 2.2 MZR-CD High severity: Oil dilution from leaking injector seals and DPF regenerations High severity: Turbocharger wear or failure
Most expensive documented repair	up to €1,200AdBlue tank crystallisation and failures (BlueHDi)Published figure^[3][4][18]	No reliable data
Which versions to buy
BuyRecommended versions	2.0 HDi 90 (DW10TD, 1999-2005)^[1] 2.0 HDi 150/163 DPF (DW10C / DW10CTED4, 2007-2013)^[1]	None
With cautionVersions to be cautious about	2.0 HDi 107/110 (DW10ATED / DW10ATED4, 2000-2008)^[1] 2.0 HDi 136/138/140 DPF (DW10BTED4, 2004-2011)^[1] 2.0 BlueHDi 120/150/163/180 (DW10FE / DW10FD / DW10FC, 2013-2021)^[1][2][3][4]	2.0 MZR-CD 121-143 (RF, 2002-2005, no DPF)^[5][7][19] 2.0 MZR-CD 105-143 (RF, 2005-2010, with DPF)^{[5][7][19][20]} 2.2 MZR-CD 125-185 (R2, 2008-2013)^{[6][8][21][22]}
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

2.0 HDi

See the 19 models with the 2.0 HDi

MZR-CD

Other comparisons

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With the MZR-CD

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Sources

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

Fiabilité du 2.0 HDIFiches-Auto · Motoring press · consulted 27 September 2026 · in French
AdBlue : problèmes en pagailleFiches-Auto · Motoring press · consulted 27 September 2026 · in French
Más problemas para Stellantis: ahora tendrá que indemnizar también a los afectados por el AdBlueAutopista · Motoring press · published 30 December 2024 · consulted 27 September 2026 · in Spanish
El fallo que afecta a cientos de coches y que ahora la OCU denuncia para reclamar indemnizacionesAutopista · Motoring press · published 29 May 2023 · consulted 27 September 2026 · in Spanish
Fiabilité Mazda 6 (2002-2008)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Mazda 6 (2008-2013)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Mazda 6 I: Bekannte Probleme und Schwachstellengebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Mazda 6 II: Bekannte Probleme und Schwachstellengebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
PSA EW/DW engineWikipedia (inglés) · Other source · consulted 27 September 2026
Peugeot 307Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Peugeot 3008Wikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Citroën C4 PicassoWikipedia (español) · Other source · consulted 27 September 2026 · in Spanish
Mazda diesel enginesWikipedia (inglés) · Other source · consulted 27 September 2026
Mazda6Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Mazda3Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Mazda5Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Mazda CX-7Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
Aditivo AdBlue: qué debes usar para evitar una reparación de 2.000 euros en tu coche diéselAutopista · Motoring press · published 1 April 2026 · consulted 27 September 2026 · in Spanish
Fiabilité Mazda 3 (2003-2009)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Japanische Zuverlässigkeit? Ärger mit den Dieseln von Mazda und Toyotagebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
Fiabilité Mazda 3 (2009-2013)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Mazda 3 II (2009-2013): Typische Probleme & Schwachstellengebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German