*Knocking Noise* - BMW 1 Series

[Joe1712]

Hi there.

Not sure if this is in the right section, but my BMW 1 Series (2012 Sport Petrol) has a persistent 'Knocking Noise' when the car is running idle, or driving very slowly.

Link to audio here (TURN VOLUME RIGHT UP): http://sendvid.com/oywkbjsw

This doesn't sound healthy at all!?

Thank you.

[Krikkit]

Does a knocking noise ever sound healthy?

Sounds like an accessory like the PAS, AC or water pump...

[bungz]

Do these have a pesky timing chain?

Hard to tell what that is but I would get it looked at by someone familiar with the engine.

Which engine is it?

[thatdude]

Ok, firstly, check the oil level.

Secondly, a knocking noise could be: driveshaft, differential, engine crank, auxillary belt pulley. Does it increase in frequency with revs?

our best bet is to get it to a qualified and professional technician who can listen to it in person, up on a ramp, raher than post a sound clip and ask a bunch of internet weirdos

[Limpet]

Needs a good mechanic with a stethoscope. Could be anything from a loose heatshield to something on the auxiliary drive (alternator, ac pump etc).

It doesn't (to me) sound like anything mechanically terminal, but you need to get it looked at ASAP.

[Joe1712]

Thanks for the quick responses! I have it booked in this afternoon but it's been for 3 repairs already. No luck with this car at all!

[northwest monkey]

Did the N43 engine get fitted to 2012 cars?

For the OP's sake, I hope not.

[iSore]

Coupes and Convertibles were built until 2013 with the old E8* body and the N43 of death. Yes, they're junk.

The 3/5 door hatches were the F20 with the N13 BMW/PSA engine as used in the Mini. Only marginally less crap mind.

It could be anything - chain, brake pump, alternator. These have electric water pumps and PAS so only the alternator and AC pump to be driven. Most of these with more then 50k are ready for a new chain anyway.

[Andy70]

Hi there, stuff the knocking noise but am I the only one getting porn links and ads at the bottom of OP's link :-) ?????

[jerry46]

Hi. I have the same problem with my n13 engine. what was the cause of this sound?

[RUSSELLM]

He only posted Twice, and that was 3 years ago.

I think he’s gone.

[smashy]

Andy70 said:

Hi there, stuff the knocking noise but am I the only one getting porn links and ads at the bottom of OP's link :-) ?????

The knocking was coming from the film being made in the boot.