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RF

2.0 MZR-CD 121-143 (RF, 2002-2005, no DPF) engine: faults and reliability

Mazda MZR-CD 2.0/2.2 (RF, R2) version

With caution

It is the oldest version of the family (over 20 years old in 2026) and shares with the rest the sensitivity to oil dilution and carbon build-up documented by fiches-auto.fr and gebrauchtwagenberater.de, although without a particulate filter as yet. A reasonable buy if you check the service history.[1][2][3]

Years
2002–2005
Power
121–143 hp
Faults that affect it
3
2 of high or critical severity
Cars that use it
2
in our database

6 sourcesHow we work

What changes in this version

First generation of the MZR-CD: 1,998 cc, Denso common rail at 1,800 bar, variable-geometry turbo and belt-driven timing. It debuted in the Mazda6 (GG) in February 2002 with 121 hp and reached the Mazda3 (BK) in 2003 in a 143 hp tune; neither version had a particulate filter yet.[4][5][6]

Engine codes of this version: RF.

Faults of the RF engine

The documented engine faults that affect this version and its years, from most to least important.

  1. 1High severityFrequency: CommonLubricationOil dilution from leaking injector seals and DPF regenerationsOn the 2.0 and 2.2 MZR-CD, injector seals that age badly and incomplete particulate filter regenerations on short journeys can let unburnt diesel into the sump, diluting the oil and leaving the engine with less lubrication.
  2. 2High severityFrequency: OccasionalTurboTurbocharger wear or failureThe MZR-CD's variable-geometry turbo appears among the faults cited by Mazda6 and Mazda3 owners, with cases of whistling, loss of boost pressure and, in one documented case, a repair of over €3,600 in France; it tends to be made worse if the oil has previously been diluted.
  3. 3Medium severityFrequency: CommonIntakeCarbon on the injectors, EGR valve and intakeUrban use and short journeys encourage carbon to build up on the injectors, EGR valve and intake of the MZR-CD, with loss of power and jerking; documented on the Mazda6 and Mazda3, on both the 2.0 and the 2.2.

Cars fitted with the RF engine

Open each car to see all its faults with this engine and what to check before buying it.

Mazda

Frequently asked questions

Is the RF engine reliable?

Our verdict is “With caution”. It is the oldest version of the family (over 20 years old in 2026) and shares with the rest the sensitivity to oil dilution and carbon build-up documented by fiches-auto.fr and gebrauchtwagenberater.de, although without a particulate filter as yet. A reasonable buy if you check the service history.[1][2][3]

What faults does the RF engine have?

The documented ones that affect this version, by importance: oil dilution from leaking injector seals and DPF regenerations (high severity), turbocharger wear or failure (high severity) and carbon on the injectors, EGR valve and intake (medium severity).

Which cars use the RF engine?

Mazda 3 I (2003–2009) and Mazda 6 I (2002–2007).[1][2][5][6]

Are you buying a car with the RF engine?

We will put you in touch with a partner only if you authorise it in the form.

Do you have a car with this engine? Tell us which faults you have had and at how many kilometres. Report your fault.

Sources

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

  1. Fiabilité Mazda 6 (2002-2008)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  2. Fiabilité Mazda 3 (2003-2009)Fiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  3. Mazda 6 I: Bekannte Probleme und Schwachstellengebrauchtwagenberater.de · Motoring press · consulted 27 September 2026 · in German
  4. Mazda diesel enginesWikipedia (inglés) · Other source · consulted 27 September 2026
  5. Mazda6Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  6. Mazda3Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German