2012 Mazda 3 problems

• 2.2 MZR-CD 125-185 (R2, 2008-2013)

  125–185 hp · R2

  It retains the 2.0's sensitivity to oil dilution and carbon build-up, and adds a problem of its own: fiches-auto.fr and gebrauchtwagenberater.de independently document timing chain stretch as a known weak point on the Mazda6 and Mazda3. Check that there is no chain noise when cold and review the service history.^[2][3][4][5]

  With caution

Faults that affect 2012 cars

• Critical severityFrequency: CommonTimingTiming chain stretch on the 2.2 MZR-CDThe 2.2-litre redesign (2008-2013) replaced the 2.0's belt with a timing chain that, according to fiches-auto.fr and gebrauchtwagenberater.de, stretches more than expected on the Mazda6 and Mazda3, and, being the same engine, presumably on the CX-7 too; a rattle when cold is the first warning.
• High 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.
• High 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.
• Medium 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.

• 2.3 MZR DISI Turbo (L3-VDT, 2010-2013)

  256–263 hp · L3-VDT

  The design is improved, but there is no data confirming how much it reduced turbo failures and sludge; still ask for the oil service history.^[7][8]

  With caution

Faults that affect 2012 cars

• Critical severityFrequency: CommonTimingTiming chain stretch and VVT actuator failure on the 2.3 DISI TurboThe 2.3 DISI Turbo's timing chain and its tensioner wear sooner than expected, especially on pre-2010 units: a rattle when cold is the warning, and if it fails it can damage the engine.Appears at around 100,000 km
• High severityFrequency: CommonTurboPremature turbocharger wear from poor lubrication on the 2.3 DISI TurboThe 2.3 DISI Turbo's turbo, with faults documented mainly on the CX-7, wears out through poor lubrication and causes blue smoke, loss of power and oil consumption; replacing it costs around €2,200 in Spain.Repair (garage): €2,200Appears at around 100,000 km
• Medium severityFrequency: OccasionalLubricationOil consumption and sludge in the 2.3 DISI Turbo engineThe 2.3 DISI Turbo can burn oil and build up sludge if service intervals are stretched; the sludge blocks the turbo's passages and speeds up wear on the turbo and the timing.

• 1.6 MZR 105 hp (Z6 / ZM-DE, 2003-2013)

  105 hp · Z6, ZM-DE

  It is the version with the best record: gebrauchtwagenberater.de considers petrol Mazda3 models reliable, the fiches-auto.fr page for the BL lists no faults in its 12 testimonials for the 1.6, and the one for the BK counts only a few, mostly sensors, among 28 testimonials.^{[2][5][10][11]}

  Buy

• 2.0 MZR 140-160 hp (LF-DE, LF-VE, 2003-2015)

  140–160 hp · LF-DE, LF-VE

  Gebrauchtwagenberater.de considers the petrol engines of the Mazda3 and Mazda6 reliable and attributes no faults specific to the 2.0; fiches-auto.fr adds isolated cases of oil consumption (3 among 17 testimonials in the Mazda3 BK and 2 among 19 in the Mazda6 GG) and of sensors, and a damaged big-end bearing at around 50,000 km.^{[10][11][12][13]}

  Buy

Faults that affect 2012 cars

• Critical severityFrequency: OccasionalCylinder head and blockBig-end bearing damage in the 2.3 MZR, with isolated cases in the 1.8 and 2.0Gebrauchtwagenberater.de cites big-end bearing damage as a known weak point of the 2.3 MZR of the Mazda6 GG, and fiches-auto.fr adds two isolated cases: a Mazda6 1.8 with a blown engine and a Mazda3 2.0 with a damaged big-end bearing at around 50,000 km.
• Low severityFrequency: OccasionalLubricationOil consumption in the 1.3, 1.6 and 2.0 MZR at high mileageIn the smaller petrol MZR engines, oil use appears mainly at high mileage: gebrauchtwagenberater.de places it in the Mazda2 DE from around 150,000-200,000 km, and fiches-auto.fr records isolated cases in the 2.0 of the Mazda3 and Mazda6 and in the 1.3 of the Mazda2.Appears at around 150,000 km
• Low severityFrequency: OccasionalIgnitionMisfires from spark plugs and ignition coils in petrol MZR enginesSpark plugs appear among the fault points of the Mazda2 DE in the ADAC statistics cited by gebrauchtwagenberater.de, and fiches-auto.fr attributes the misfires of the Mazda3 1.6 to coils, spark plugs or sensors.

• Medium severityFrequency: OccasionalBodywork and interiorRecall for corrosion of the tailgate damper bracketYes: the brackets that hold the Mazda3 BL's tailgate gas struts can rust from road salt and break, so the tailgate may not stay open or may slam shut.
• Medium severityFrequency: OccasionalSuspensionWear of bushes and shock absorbers in the rear suspensionThe suspension axle of the Mazda3 BL is one of the points most often flagged in German TÜV inspections; French owners document worn bushes and shock absorbers, and one case of an anti-roll bar that had to be retightened at 30,000 km.
• Medium severityFrequency: OccasionalElectronics and infotainmentKey detection fault and loss of power in intense coldSome Mazda3 owners, especially of the 2.2 MZR-CD 190, document minor key detection faults when starting and a loss of power in intense cold; gebrauchtwagenberater.de independently confirms that the electronics have caused problems in some units of this generation.
• Medium severityFrequency: RareBrakesFaulty brake hoses on the Mazda 3 (BL) flagged in the TÜV reportAuto Bild, summarising the German TÜV report, states that the brake hoses on the Mazda3 BL may be faulty; it gives no figures and does not explain the cause.
• Low severityFrequency: OccasionalHeadlights and lightsDefects in the front headlights of the Mazda 3 (BL) flagged in German technical inspectionsAuto Zeitung rates the headlights as the most-cited problem on the Mazda 3 BL, and Auto Bild, summarising the German TÜV, reports front lighting defect rates above average; neither specifies the cause.