Abnormal noise

[mkaay]

I just purchase BMW 7 Series 730Ld G12 2015 (new shape), in the morning when I start the engine I hear abnormal noise.

Please can anyone advise the noise from the car is normal in the cold engine? If the noise is abnormal then what could be the problem?

Here is the video:

The car is under warranty.

[Googsy]

It shouldn’t make that noise .Sounds like a belt rubbing off something . Have the popped the hood and had a listen to see if you can determine source of noise? I would get it back to the dealer you bought it from promptly if it was mine.

[mkaay]

Originally Posted by Googsy

It shouldn’t make that noise .Sounds like a belt rubbing off something . Have the popped the hood and had a listen to see if you can determine source of noise? I would get it back to the dealer you bought it from promptly if it was mine.

Thanks! I will get in touch with the dealer and ask them to fix the issue.

[ztx84]

My initial reaction was it might be a loose heat shield or something like that perhaps? Could be a belt too, but yes - if you've just bought it then make use of your warranty - should be something pretty simple.

[mkaay]

Originally Posted by ztx84

My initial reaction was it might be a loose heat shield or something like that perhaps? Could be a belt too, but yes - if you've just bought it then make use of your warranty - should be something pretty simple.

I am surprised how this car passed BMW approved used car standard with this noise. I've emailed the dealer, waiting for this response.

[Googsy]

Any developments ?

[mkaay]

Originally Posted by Googsy

Any developments ?

The dealer investigates the issue and couldn't hear any noise. The noise is not permanent, sometimes only during cold engine, some after a long journey.

I got the car back and will observe for few days.

[mkaay]

I finally manage to show the dealer the noise car generates randomly, they advised that exhaust make this noise when the car self cleans the diesel particles. The noise stopped once the cleaning process is done.

[Googsy]

I’m still not convinced , I have had plenty of diesels and they never made a sound like that. Given the price of a 7 series I’m not convinced that sound is normal . If it was mine , I would get a second opinion whilst it’s under warranty , maybe if you have a local specialist nearby. Better safe than sorry that’s my motto. I have been burnt a few times in the past .

[mkaay]

I can't any specialist in the area but have a friend who owns a garage. I will take the car and ask him to inspect it. I will post an update after inspection.

[Googsy]

Yep do especially whilst it’s still under warranty.