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September 30, 2019 Service bulletin

If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake...

Mazda technical service bulletin MT-002-19 for 2004-2020 Mazda MAZDA3, 2013-2019 Mazda CX-5 and 2003-2019 Mazda MAZDA6 and others.

Bulletin number
MT-002-19
Component
Engine and engine cooling
Summary
If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the intake manifold is not cleaned properly, the replacement engine may fail prematurely. Metallic debris from the old engine (with catastrophic internal mechanical failure) may rest inside the intake manifold. When the new engine assembly is installed, debris in the intake manifold will be ingested into the new engine and cause internal damage.

Owners of these vehicles have filed 2,013 complaints in the engine category.

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