Some vehicles may exhibit an unusual rattle/buzzing type noise from the presilencer when driving at...
Mazda technical service bulletin 01-024-15-3110 for 2010-2015 Mazda CX-9.
- Bulletin number
- 01-024-15-3110
- Component
- Equipment adaptive/mobility
- Summary
- Some vehicles may exhibit an unusual rattle/buzzing type noise from the presilencer when driving at approximately 1800 RPM. The lower (rear-side) of the pre-silencer may be thermally deformed due to insufficient rigidity (fewer weld spots). The deformed portion may resonate exhaust gas pulsations, which causes noise. A reinforced plate has been added to the pre-silencer to increase the rigidity, thereby eliminating deformation.
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