[Bmw Fan M240i]

Had the M240i for 2 months now And love it.
Have only covered around 1400 miles, have had it in sports mode many times but today I noticed a slight burble at slow speed. When accelerating softly from a standstill, at around 10-20mph if I release my foot from the accelerator I get a small burble, is this normal? I’ve never noticed it before but I noticed it today over the stereo. It’s only in sports mode and happens everytime i release the peddle, and I’m not putting it under any load. It is a little annoying as I can feel and hear the burble even though it’s only slight, although I suspect this is normal?

[keylime503]

Normal in sport mode

[Maynard]

Probably new owner hallucinosis - mine lasted about 3000miles before I stopped alerting to new odd noises. And IIRC the ASD is supposed to be louder in sport and sport+.

[PeterWT]

Originally Posted by Bmw Fan M240i

...It is a little annoying as I can feel and hear the burble...

Annoying?
I paid 50K USD + a Dinan mid-pipe install and coded out the ASD, just so that I could hear that all the time.

[Bmw Fan M240i]

Originally Posted by PeterWT

Annoying?
I paid 50K USD + a Dinan mid-pipe install and coded out the ASD, just so that I could hear that all the time.

Don’t get me wrong, I love the burble sound and the loudness of it when flooring it and downshifting. but just wasn’t sure if this was a normal sound when I’m just driving in normal traffic, accelerate softly, release, tiny burble over and over again. It’s not a burble that is loud, sounds more like a vibration. But i guess it’s standard so it’s all good

[Ron Jeffries]

Yes it is specially programmed to do that. Supposed to be cool. Even with M Perf Exhaust, it's not loud enough for me and my wife. May have to do the mid-pipe.

My 135is was really snarly, we loved it.

[Bmw Fan M240i]

Originally Posted by Maynard

Probably new owner hallucinosis - mine lasted about 3000miles before I stopped alerting to new odd noises. And IIRC the ASD is supposed to be louder in sport and sport+.

Sorry, just realised how my post may have sounded. What I meant is I heard the slight burble over the stereo that was playing, not from the stereo, when I heard it I turned the stereo off and the exhaust was definitely making the sound. Just found it weird why it would do this under no load and at such a slow speed, like I say it wasn’t that loud so it’s not as if it’s was impressing anyone, if anything it sounds like a rattle. Hence the annoyance. In stop start traffic I just didn’t think it sounded right...

[Ron Jeffries]

Note that the ASD makes sound thru the stereo even with the stereo off, so if you haven't coded it off, it still could be a fake noise.

[Luftwaffe1O1]

It should be real, I didn't hear mine inside the cabin, but with the windows rolled down in the garage at work, I would hear it at low speeds.

[wjones14]

Originally Posted by Bmw Fan M240i

Sorry, just realised how my post may have sounded. What I meant is I heard the slight burble over the stereo that was playing, not from the stereo, when I heard it I turned the stereo off and the exhaust was definitely making the sound. Just found it weird why it would do this under no load and at such a slow speed, like I say it wasn’t that loud so it’s not as if it’s was impressing anyone, if anything it sounds like a rattle. Hence the annoyance. In stop start traffic I just didn’t think it sounded right...

To the ears of most car guys (and gals), that burble when you back off the throttle is like sweet music. The folks who spring for the M Performance Exhaust are rewarded by an even more pronounced burble.

The M235i isn't the only car that does that when letting off the throttle at low cruising speeds like 2nd gear. Just about every performance car does it. To most performance car fans, it's a badge of honor.

[Bmw Fan M240i]

Originally Posted by wjones14

To the ears of most car guys (and gals), that burble when you back off the throttle is like sweet music. The folks who spring for the M Performance Exhaust are rewarded by an even more pronounced burble.

The M235i isn't the only car that does that when letting off the throttle at low cruising speeds like 2nd gear. Just about every performance car does it. To most performance car fans, it's a badge of honor.

This is true, but it took me 1400 miles to notice it and I’ve been in sports mode on a regular basis. It’s very subtle, not like the burbles you get downshifting at high revs. I’d say most people outside the car wouldn’t really hear it with normal traffic noise etc. I’ll have to have another listen when i next take it out