Hi, I recently bought a Honda Jazz 2013 model which has run for 105k miles. While driving I hear a metal rattling sound in 3rd, 4th, 5th gears, only at certain rpm like 2000 where it feels like there is some load on the engine. I have no idea where the sound is coming from as it's not there while the car is not running even if I rev the engine. The mechanic also couldn't spot the reason.

I put my phone inside the bonnet and then drove the car to capture the sound. Attached is the sound capture from inside the bonnet. In 4th gear I rev the engine in intervals to capture the sound.

Can anyone please help me spot where the sound comes from?

 

Hard to say from the sound alone. To me it sounds like it could be an exhaust sound.

Perhaps the exhaust pipes are rattling against the heat shield or the heat shield has come loose and is rattling against something else.

I would check the heat shield, exhaust, engine mounts and splash guard for missing fasteners or signs of decay.

 

Loose heat shield on exhaust?

Tap your exhaust with a rubber mallet, it should reproduce the sound...

 

3rd for exhaust.