BMW M4 or M3 rattle from beneath car on startup

[DannyM4]

Hello ladies and gents,
I have on going faults and issues with my car and wanted to ask forum members if on start up they get a rattling noise coming from beneath their car? The sound can be a bit intermittent but I've noticed on mine it does it more and is louder when the engine is warm. It is from the front of the car and only lasts a couple of seconds...
Any replies with info would be much appreciated...
Cheers

[propete1031]

Originally Posted by DannyM4

Hello ladies and gents,
I have on going faults and issues with my car and wanted to ask forum members if on start up they get a rattling noise coming from beneath their car? The sound can be a bit intermittent but I've noticed on mine it does it more and is louder when the engine is warm. It is from the front of the car and only lasts a couple of seconds...
Any replies with info would be much appreciated...
Cheers

Can you video it? Have you had any work done on the car recently? I had an engine replacement once and the rattle I had after that work was a bolt securing the engine exhaust manifold had been forgotten and it was just resonating against the engine - Hell of an annoying noise!

[lethbridge]

Is it the exhaust? Non stock exhausts are certainly prone to do this if not installed very accurately...

[Ghostriderf80]

Originally Posted by DannyM4

Hello ladies and gents,
I have on going faults and issues with my car and wanted to ask forum members if on start up they get a rattling noise coming from beneath their car? The sound can be a bit intermittent but I've noticed on mine it does it more and is louder when the engine is warm. It is from the front of the car and only lasts a couple of seconds...
Any replies with info would be much appreciated...
Cheers

Its normal, if its in the front, its the bolts holding the DPs. Tighten them. the rear its the muffler. Its the character.