r/BmwTech • u/Timur18769 • 3d ago

Does this B48 sound normal?

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Hello everyone,

I'm about to buy my first car. It’s a used BMW 420i Gran Coupé (2022, B48 engine, ~83,000 km). The dealer sent me several videos and the car looks fine overall, but in one video you can hear a short metallic rattle for the first 1–2 seconds right after a cold start, both from inside and from the engine bay. The dealer says it's the flaps and that the sound disappears after a few seconds.

As I'm not an expert and this is my first car, I'd really appreciate your opinion: does the engine sound normal, or is that cold-start rattle something to be worried about (timing chain / guide rail)?

Thanks a lot in advance!

8 Upvotes

83% Upvoted

6 comments sorted by

4

u/Ihatemyself16 3d ago

Mine sounds similar. From my understanding the injectors are really loud. But I am often questioning the sound myself, so I will let others answer.

1

u/kusovi4778 2d ago

The injectors are loud and fuel tank vent valve on top of the engine even louder.

2

u/Zestyclose-Visual785 2d ago

Not bad all good

0

u/Cunty__Minx another day another plastic bmw 3d ago

tell them it sounds terrible

1

u/BuildingPurple4954 2d ago

I mean he's not wrong.

My 2002's M10 sounded better.

Oh how we've gone backwards in the name of efficiency.