THUD sound when starting...

[Maddox2012]

I have a 2007 mdx with 48k on it. Whenever i start the car i can hear a "THUD" sound, is that normal? or should i be concerned? Anyone else having the same issue?

[ken88]

The thud sound means the ABS system is being activated. This is normal.

[Maddox2012]

Thank you for the quick response ken88!

[Needsdecaf]

Originally Posted by Maddox2012

I have a 2007 mdx with 48k on it. Whenever i start the car i can hear a "THUD" sound, is that normal? or should i be concerned? Anyone else having the same issue?

When is the THUD sound?

The abs self check isn't a thud, it's a rapid "tock, tock, tock, tock" and it happens underway at a preset speed (20kmh maybe?)

If it happens when you start it, that's something else. My car has a decided "thud" sound when it starts. When it FIRST catches as it turns over, the first sense of ignition could be considered "thud" like. To me, sounds good. Has always done it.

[MDX Dude]

I have a thud too once every few times I turn my MDX on as well. Mine is loud and can be heard thru the speakers. Just a loud one second "thud" and then its done. I am gonna ask about it when I take it in for my next oil change.

[Maddox2012]

mdx dude , Please let us know what they say when you bring your car in ... Thanks!

[Needsdecaf]

Originally Posted by MDX Dude

I have a thud too once every few times I turn my MDX on as well. Mine is loud and can be heard thru the speakers. Just a loud one second "thud" and then its done. I am gonna ask about it when I take it in for my next oil change.

I haven't been active here in a while, but if I recall, there used to be a TSB for a "popping" sound that came from the speakers when first starting. I used to have it and swapping out the amplifier as per the TSB fixed things.

[MDX Dude]

Originally Posted by Needsdecaf

I haven't been active here in a while, but if I recall, there used to be a TSB for a "popping" sound that came from the speakers when first starting. I used to have it and swapping out the amplifier as per the TSB fixed things.

Thanks for the info man!

[phins2rt]

Could also be the air conditioning kicking on. Turn that off and see if it still makes the noise.

[Snow White]

Originally Posted by Needsdecaf

I haven't been active here in a while, but if I recall, there used to be a TSB for a "popping" sound that came from the speakers when first starting. I used to have it and swapping out the amplifier as per the TSB fixed things.

Anyone have a link to this TSB? My wife's car has the same THUD as described when starting the car. It is clear that it is coming from the speakers.