INFINITI FX35 knocking noise on passenger side near shifter when idling above 30 mph on INFINITI FX35

Some INFINITI FX35 owners report experiencing a knocking noise on the passenger side near the shifter when idling above 30 mph, which may indicate various underlying issues. This noise could originate from the engine compartment, highlighting a potential problem that requires immediate attention to prevent worsening over time. Common causes include detonation knock, wear and tear, damage to wheels and suspension, or build-up of mud or ice. Engine knocking at idle may stem from worn main bearings or crankshaft, fuel delivery issues, inferior fuel quality, incorrect engine timing, or malfunctioning sensors like the mass air flow or engine knock sensor. Additionally, some owners have noted that problems in the exhaust system can lead to unusual knocking or rattling sounds during idling or acceleration. It is advisable for owners experiencing these symptoms to have a mechanic inspect the fuel damper hose, main bearings, crankshaft, fuel delivery system, and exhaust system to identify and resolve the source of the noise.