2007 m35 x need help asap

[mistic1209]

having a shaking sound coming from under the car .checked all components under and dont find any problem seems like its from the catalic converter any options to stop this

[szh]

Welcome to NICO!

Unfortunately, I don't think we can diagnose this based on your description ... could be anything from loose under-engine cover, broken spring, loose exhaust shields, small leak in the exhaust, bad gas causing pinging, broken piece inside the muffler or catalytic converter, etc. ...

Best to take it to a tech or the dealer, I think.

Z

[ferrarifrancis]

I have the same sound to only occurs at low rpm sounds like a coin in can rattling. I had the mechanic put the car on the lift and turns out the heat shields on the oem cats are rusted out. Trying to decide should I go with hi flow cats or oem cause I'm gonna do megan exhaust w/midpipe.