2.3 MZR DISI Turbo engine: faults and reliability

• 2.3 MZR DISI Turbo 256-260 hp (L3-VDT, 2005-2009)

  2005–2009 · 256–263 hp · L3-VDT

  With caution

  This is the series most affected by chain problems according to Wikipedia; it is only worth considering with an oil service history and a timing check.^[1][2]

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

  2010–2013 · 256–263 hp · L3-VDT

  With caution

  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.^[1][2]

Buy: No known serious faults, or they have already been corrected, in this version. With caution: Worth buying if something specific is verified: history, a replaced part or a completed campaign. Avoid: High risk of a serious fault that is hard to check for or prevent.

1. 1Critical severityCommonFrequency: 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
2. 2High severityCommonFrequency: 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
3. 3Medium severityOccasionalFrequency: 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.

Severity colours: low, medium, high, critical. How we rate them

Manufacturer

Mazda

Family

MZR

Fuel

Petrol

Displacement

2,261 cm³

Cylinders

4

Fuel system

Turbo

Injection

Direct injection

Timing

Chain

Power

256–263 hp

Peak torque

380 Nm

Production

2005–2013

Makes

Mazda

Technical data^[1][4]

1. 2005–2009

   2.3 MZR DISI Turbo 256-260 hp (L3-VDT, 2005-2009)

   First series of the L3-VDT, from the 2005 Mazda 6 MPS; the chain tensioning problems are concentrated before the 2010 revision.^[1]

2. 2010–2013

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

   2010 revision with a redesigned cylinder head, a faster ECU, better turbo seals and better chain tensioning, according to Wikipedia.^[1][5]