Rattling noise when Accelerating

Asked by Nov 26, 2016 at 02:10 AM about the 2007 Infiniti M35 4 Dr Sport

Question type: Maintenance & Repair

My 2007 infiniti M35X is making a noise when I accelerate and reach speeds at
40mph and 70mph. It's like an exhaust rattling noise or something to that
nature.

2 Answers

223,725

Might be a loose catalytic convertor heat shield. The tend to rust and the welds break loose and rattle at certain rpms and speeds.

40,725

Are you running premium fuel as recommended?

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